From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../listing-02-01/Cargo.lock                       |   6 ++
 .../listing-02-01/Cargo.toml                       |   8 ++
 .../listing-02-01/src/main.rs                      |  31 ++++++
 .../listing-02-02/Cargo.lock                       |  83 +++++++++++++++
 .../listing-02-02/Cargo.toml                       |   9 ++
 .../listing-02-02/src/main.rs                      |  15 +++
 .../listing-02-03/Cargo.lock                       |  83 +++++++++++++++
 .../listing-02-03/Cargo.toml                       |   9 ++
 .../listing-02-03/src/main.rs                      |  28 +++++
 .../listing-02-04/Cargo.lock                       |  83 +++++++++++++++
 .../listing-02-04/Cargo.toml                       |   9 ++
 .../listing-02-04/output.txt                       |  20 ++++
 .../listing-02-04/src/main.rs                      |  32 ++++++
 .../listing-02-05/Cargo.lock                       |  83 +++++++++++++++
 .../listing-02-05/Cargo.toml                       |   9 ++
 .../listing-02-05/src/main.rs                      |  45 ++++++++
 .../listing-02-06/Cargo.lock                       |  83 +++++++++++++++
 .../listing-02-06/Cargo.toml                       |   9 ++
 .../listing-02-06/src/main.rs                      |  35 +++++++
 .../no-listing-01-cargo-new/Cargo.lock             |   7 ++
 .../no-listing-01-cargo-new/Cargo.toml             |   8 ++
 .../no-listing-01-cargo-new/output.txt             |   5 +
 .../no-listing-01-cargo-new/src/main.rs            |   3 +
 .../no-listing-02-without-expect/Cargo.lock        |   6 ++
 .../no-listing-02-without-expect/Cargo.toml        |   8 ++
 .../no-listing-02-without-expect/output.txt        |  13 +++
 .../no-listing-02-without-expect/src/main.rs       |  13 +++
 .../Cargo.lock                                     |  83 +++++++++++++++
 .../Cargo.toml                                     |   9 ++
 .../src/main.rs                                    |  33 ++++++
 .../no-listing-04-looping/Cargo.lock               |  83 +++++++++++++++
 .../no-listing-04-looping/Cargo.toml               |   9 ++
 .../no-listing-04-looping/src/main.rs              |  40 ++++++++
 .../no-listing-05-quitting/Cargo.lock              |  83 +++++++++++++++
 .../no-listing-05-quitting/Cargo.toml              |   9 ++
 .../no-listing-05-quitting/src/main.rs             |  38 +++++++
 .../listing-03-01/Cargo.lock                       |   6 ++
 .../listing-03-01/Cargo.toml                       |   6 ++
 .../listing-03-01/src/main.rs                      |   3 +
 .../listing-03-02/Cargo.lock                       |   6 ++
 .../listing-03-02/Cargo.toml                       |   6 ++
 .../listing-03-02/output.txt                       |   5 +
 .../listing-03-02/src/main.rs                      |   6 ++
 .../listing-03-03/Cargo.lock                       |   6 ++
 .../listing-03-03/Cargo.toml                       |   6 ++
 .../listing-03-03/src/main.rs                      |  11 ++
 .../listing-03-04/Cargo.lock                       |   6 ++
 .../listing-03-04/Cargo.toml                       |   6 ++
 .../listing-03-04/output.txt                       |   9 ++
 .../listing-03-04/src/main.rs                      |  10 ++
 .../listing-03-05/Cargo.lock                       |   6 ++
 .../listing-03-05/Cargo.toml                       |   6 ++
 .../listing-03-05/src/main.rs                      |   7 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  16 +++
 .../src/main.rs                                    |   6 ++
 .../no-listing-02-adding-mut/Cargo.lock            |   6 ++
 .../no-listing-02-adding-mut/Cargo.toml            |   6 ++
 .../no-listing-02-adding-mut/output.txt            |   6 ++
 .../no-listing-02-adding-mut/src/main.rs           |   6 ++
 .../no-listing-03-shadowing/Cargo.lock             |   6 ++
 .../no-listing-03-shadowing/Cargo.toml             |   6 ++
 .../no-listing-03-shadowing/output.txt             |   6 ++
 .../no-listing-03-shadowing/src/main.rs            |  12 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |   6 ++
 .../no-listing-05-mut-cant-change-types/Cargo.lock |   6 ++
 .../no-listing-05-mut-cant-change-types/Cargo.toml |   6 ++
 .../no-listing-05-mut-cant-change-types/output.txt |  12 +++
 .../src/main.rs                                    |   6 ++
 .../no-listing-06-floating-point/Cargo.lock        |   6 ++
 .../no-listing-06-floating-point/Cargo.toml        |   6 ++
 .../no-listing-06-floating-point/src/main.rs       |   5 +
 .../no-listing-07-numeric-operations/Cargo.lock    |   6 ++
 .../no-listing-07-numeric-operations/Cargo.toml    |   6 ++
 .../no-listing-07-numeric-operations/src/main.rs   |  17 ++++
 .../no-listing-08-boolean/Cargo.lock               |   6 ++
 .../no-listing-08-boolean/Cargo.toml               |   6 ++
 .../no-listing-08-boolean/src/main.rs              |   5 +
 .../no-listing-09-char/Cargo.lock                  |   6 ++
 .../no-listing-09-char/Cargo.toml                  |   6 ++
 .../no-listing-09-char/src/main.rs                 |   5 +
 .../no-listing-10-tuples/Cargo.lock                |   6 ++
 .../no-listing-10-tuples/Cargo.toml                |   6 ++
 .../no-listing-10-tuples/src/main.rs               |   3 +
 .../no-listing-11-destructuring-tuples/Cargo.lock  |   6 ++
 .../no-listing-11-destructuring-tuples/Cargo.toml  |   6 ++
 .../no-listing-11-destructuring-tuples/src/main.rs |   7 ++
 .../no-listing-12-tuple-indexing/Cargo.lock        |   6 ++
 .../no-listing-12-tuple-indexing/Cargo.toml        |   6 ++
 .../no-listing-12-tuple-indexing/src/main.rs       |   9 ++
 .../no-listing-13-arrays/Cargo.lock                |   6 ++
 .../no-listing-13-arrays/Cargo.toml                |   6 ++
 .../no-listing-13-arrays/src/main.rs               |   3 +
 .../no-listing-14-array-indexing/Cargo.lock        |   6 ++
 .../no-listing-14-array-indexing/Cargo.toml        |   6 ++
 .../no-listing-14-array-indexing/src/main.rs       |   6 ++
 .../no-listing-15-invalid-array-access/Cargo.lock  |   6 ++
 .../no-listing-15-invalid-array-access/Cargo.toml  |   6 ++
 .../no-listing-15-invalid-array-access/src/main.rs |  22 ++++
 .../no-listing-16-functions/Cargo.lock             |   6 ++
 .../no-listing-16-functions/Cargo.toml             |   6 ++
 .../no-listing-16-functions/output.txt             |   6 ++
 .../no-listing-16-functions/src/main.rs            |   9 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |   5 +
 .../src/main.rs                                    |   7 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |   5 +
 .../src/main.rs                                    |   7 ++
 .../Cargo.lock                                     |   4 +
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  34 +++++++
 .../rustfmt-ignore                                 |   1 +
 .../src/main.rs                                    |   3 +
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |   8 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |   5 +
 .../src/main.rs                                    |   9 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |   9 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  14 +++
 .../src/main.rs                                    |   9 ++
 .../no-listing-24-comments-end-of-line/Cargo.lock  |   6 ++
 .../no-listing-24-comments-end-of-line/Cargo.toml  |   6 ++
 .../no-listing-24-comments-end-of-line/src/main.rs |   3 +
 .../no-listing-25-comments-above-line/Cargo.lock   |   6 ++
 .../no-listing-25-comments-above-line/Cargo.toml   |   6 ++
 .../no-listing-25-comments-above-line/src/main.rs  |   4 +
 .../no-listing-26-if-true/Cargo.lock               |   6 ++
 .../no-listing-26-if-true/Cargo.toml               |   6 ++
 .../no-listing-26-if-true/output.txt               |   5 +
 .../no-listing-26-if-true/src/main.rs              |   9 ++
 .../no-listing-27-if-false/Cargo.lock              |   6 ++
 .../no-listing-27-if-false/Cargo.toml              |   6 ++
 .../no-listing-27-if-false/output.txt              |   5 +
 .../no-listing-27-if-false/src/main.rs             |  11 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  10 ++
 .../src/main.rs                                    |   7 ++
 .../no-listing-29-if-not-equal-0/Cargo.lock        |   6 ++
 .../no-listing-29-if-not-equal-0/Cargo.toml        |   6 ++
 .../no-listing-29-if-not-equal-0/src/main.rs       |   7 ++
 .../no-listing-30-else-if/Cargo.lock               |   6 ++
 .../no-listing-30-else-if/Cargo.toml               |   6 ++
 .../no-listing-30-else-if/output.txt               |   5 +
 .../no-listing-30-else-if/src/main.rs              |  13 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  12 +++
 .../src/main.rs                                    |   7 ++
 .../no-listing-32-5-loop-labels/Cargo.lock         |   5 +
 .../no-listing-32-5-loop-labels/Cargo.toml         |   6 ++
 .../no-listing-32-5-loop-labels/output.txt         |  13 +++
 .../no-listing-32-5-loop-labels/src/main.rs        |  21 ++++
 .../no-listing-32-loop/Cargo.lock                  |   6 ++
 .../no-listing-32-loop/Cargo.toml                  |   6 ++
 .../no-listing-32-loop/src/main.rs                 |   5 +
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  13 +++
 .../no-listing-34-for-range/Cargo.lock             |   6 ++
 .../no-listing-34-for-range/Cargo.toml             |   6 ++
 .../no-listing-34-for-range/src/main.rs            |   6 ++
 .../output-only-01-no-type-annotations/Cargo.lock  |   6 ++
 .../output-only-01-no-type-annotations/Cargo.toml  |   8 ++
 .../output-only-01-no-type-annotations/output.txt  |  10 ++
 .../output-only-01-no-type-annotations/src/main.rs |   3 +
 .../listing-04-01/Cargo.lock                       |   4 +
 .../listing-04-01/Cargo.toml                       |   6 ++
 .../listing-04-01/rustfmt-ignore                   |   3 +
 .../listing-04-01/src/main.rs                      |   9 ++
 .../listing-04-02/Cargo.lock                       |   6 ++
 .../listing-04-02/Cargo.toml                       |   6 ++
 .../listing-04-02/src/main.rs                      |   6 ++
 .../listing-04-03/Cargo.lock                       |   4 +
 .../listing-04-03/Cargo.toml                       |   6 ++
 .../listing-04-03/rustfmt-ignore                   |   3 +
 .../listing-04-03/src/main.rs                      |  23 +++++
 .../listing-04-04/Cargo.lock                       |   4 +
 .../listing-04-04/Cargo.toml                       |   6 ++
 .../listing-04-04/rustfmt-ignore                   |   3 +
 .../listing-04-04/src/main.rs                      |  29 ++++++
 .../listing-04-05/Cargo.lock                       |   6 ++
 .../listing-04-05/Cargo.toml                       |   6 ++
 .../listing-04-05/src/main.rs                      |  13 +++
 .../listing-04-06/Cargo.lock                       |   6 ++
 .../listing-04-06/Cargo.toml                       |   6 ++
 .../listing-04-06/output.txt                       |  12 +++
 .../listing-04-06/src/main.rs                      |   9 ++
 .../listing-04-07/Cargo.lock                       |   6 ++
 .../listing-04-07/Cargo.toml                       |   6 ++
 .../listing-04-07/src/main.rs                      |  21 ++++
 .../listing-04-08/Cargo.lock                       |   6 ++
 .../listing-04-08/Cargo.toml                       |   6 ++
 .../listing-04-08/src/main.rs                      |  24 +++++
 .../listing-04-09/Cargo.lock                       |   6 ++
 .../listing-04-09/Cargo.toml                       |   6 ++
 .../listing-04-09/src/main.rs                      |  36 +++++++
 .../no-listing-01-can-mutate-string/Cargo.lock     |   6 ++
 .../no-listing-01-can-mutate-string/Cargo.toml     |   6 ++
 .../no-listing-01-can-mutate-string/src/main.rs    |   9 ++
 .../no-listing-02-string-scope/Cargo.lock          |   4 +
 .../no-listing-02-string-scope/Cargo.toml          |   6 ++
 .../no-listing-02-string-scope/rustfmt-ignore      |   3 +
 .../no-listing-02-string-scope/src/main.rs         |  10 ++
 .../no-listing-03-string-move/Cargo.lock           |   6 ++
 .../no-listing-03-string-move/Cargo.toml           |   6 ++
 .../no-listing-03-string-move/src/main.rs          |   6 ++
 .../no-listing-04-cant-use-after-move/Cargo.lock   |   6 ++
 .../no-listing-04-cant-use-after-move/Cargo.toml   |   6 ++
 .../no-listing-04-cant-use-after-move/output.txt   |  17 ++++
 .../no-listing-04-cant-use-after-move/src/main.rs  |   8 ++
 .../no-listing-05-clone/Cargo.lock                 |   6 ++
 .../no-listing-05-clone/Cargo.toml                 |   6 ++
 .../no-listing-05-clone/src/main.rs                |   8 ++
 .../no-listing-06-copy/Cargo.lock                  |   6 ++
 .../no-listing-06-copy/Cargo.toml                  |   6 ++
 .../no-listing-06-copy/src/main.rs                 |   8 ++
 .../no-listing-07-reference/Cargo.lock             |   6 ++
 .../no-listing-07-reference/Cargo.toml             |   6 ++
 .../no-listing-07-reference/src/main.rs            |  15 +++
 .../Cargo.lock                                     |   4 +
 .../Cargo.toml                                     |   6 ++
 .../rustfmt-ignore                                 |   3 +
 .../src/main.rs                                    |  14 +++
 .../no-listing-09-fixes-listing-04-06/Cargo.lock   |   6 ++
 .../no-listing-09-fixes-listing-04-06/Cargo.toml   |   6 ++
 .../no-listing-09-fixes-listing-04-06/src/main.rs  |   9 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  15 +++
 .../src/main.rs                                    |  10 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  11 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  16 +++
 .../src/main.rs                                    |  11 ++
 .../no-listing-13-reference-scope-ends/Cargo.lock  |   6 ++
 .../no-listing-13-reference-scope-ends/Cargo.toml  |   6 ++
 .../no-listing-13-reference-scope-ends/src/main.rs |  13 +++
 .../no-listing-14-dangling-reference/Cargo.lock    |   6 ++
 .../no-listing-14-dangling-reference/Cargo.toml    |   6 ++
 .../no-listing-14-dangling-reference/output.txt    |  16 +++
 .../no-listing-14-dangling-reference/src/main.rs   |   9 ++
 .../Cargo.lock                                     |   4 +
 .../Cargo.toml                                     |   6 ++
 .../rustfmt-ignore                                 |   3 +
 .../src/main.rs                                    |  13 +++
 .../no-listing-16-no-dangle/Cargo.lock             |   6 ++
 .../no-listing-16-no-dangle/Cargo.toml             |   6 ++
 .../no-listing-16-no-dangle/src/main.rs            |  11 ++
 .../no-listing-17-slice/Cargo.lock                 |   6 ++
 .../no-listing-17-slice/Cargo.toml                 |   6 ++
 .../no-listing-17-slice/src/main.rs                |   8 ++
 .../no-listing-18-first-word-slice/Cargo.lock      |   6 ++
 .../no-listing-18-first-word-slice/Cargo.toml      |   6 ++
 .../no-listing-18-first-word-slice/src/main.rs     |  15 +++
 .../no-listing-19-slice-error/Cargo.lock           |   6 ++
 .../no-listing-19-slice-error/Cargo.toml           |   6 ++
 .../no-listing-19-slice-error/output.txt           |  16 +++
 .../no-listing-19-slice-error/src/main.rs          |  23 +++++
 .../listing-05-01/Cargo.lock                       |   6 ++
 .../listing-05-01/Cargo.toml                       |   6 ++
 .../listing-05-01/src/main.rs                      |  10 ++
 .../listing-05-02/Cargo.lock                       |   6 ++
 .../listing-05-02/Cargo.toml                       |   6 ++
 .../listing-05-02/src/main.rs                      |  17 ++++
 .../listing-05-03/Cargo.lock                       |   6 ++
 .../listing-05-03/Cargo.toml                       |   6 ++
 .../listing-05-03/src/main.rs                      |  19 ++++
 .../listing-05-04/Cargo.lock                       |   6 ++
 .../listing-05-04/Cargo.toml                       |   6 ++
 .../listing-05-04/src/main.rs                      |  24 +++++
 .../listing-05-05/Cargo.lock                       |   6 ++
 .../listing-05-05/Cargo.toml                       |   6 ++
 .../listing-05-05/src/main.rs                      |  24 +++++
 .../listing-05-06/Cargo.lock                       |   6 ++
 .../listing-05-06/Cargo.toml                       |   6 ++
 .../listing-05-06/src/main.rs                      |  28 +++++
 .../listing-05-07/Cargo.lock                       |   6 ++
 .../listing-05-07/Cargo.toml                       |   6 ++
 .../listing-05-07/src/main.rs                      |  26 +++++
 .../listing-05-08/Cargo.lock                       |   5 +
 .../listing-05-08/Cargo.toml                       |   6 ++
 .../listing-05-08/output.txt                       |   5 +
 .../listing-05-08/src/main.rs                      |  17 ++++
 .../listing-05-09/Cargo.lock                       |   5 +
 .../listing-05-09/Cargo.toml                       |   6 ++
 .../listing-05-09/src/main.rs                      |  12 +++
 .../listing-05-10/Cargo.lock                       |   5 +
 .../listing-05-10/Cargo.toml                       |   6 ++
 .../listing-05-10/src/main.rs                      |  20 ++++
 .../listing-05-11/Cargo.lock                       |   5 +
 .../listing-05-11/Cargo.toml                       |   6 ++
 .../listing-05-11/output.txt                       |  14 +++
 .../listing-05-11/src/main.rs                      |  13 +++
 .../listing-05-12/Cargo.lock                       |   5 +
 .../listing-05-12/Cargo.toml                       |   6 ++
 .../listing-05-12/output.txt                       |   5 +
 .../listing-05-12/src/main.rs                      |  14 +++
 .../listing-05-13/Cargo.lock                       |   5 +
 .../listing-05-13/Cargo.toml                       |   6 ++
 .../listing-05-13/src/main.rs                      |  23 +++++
 .../listing-05-14/Cargo.lock                       |   5 +
 .../listing-05-14/Cargo.toml                       |   6 ++
 .../listing-05-14/src/main.rs                      |  17 ++++
 .../listing-05-15/Cargo.lock                       |   5 +
 .../listing-05-15/Cargo.toml                       |   6 ++
 .../listing-05-15/src/main.rs                      |  35 +++++++
 .../listing-05-16/Cargo.lock                       |   5 +
 .../listing-05-16/Cargo.toml                       |   6 ++
 .../listing-05-16/src/main.rs                      |  37 +++++++
 .../no-listing-01-tuple-structs/Cargo.lock         |   6 ++
 .../no-listing-01-tuple-structs/Cargo.toml         |   6 ++
 .../no-listing-01-tuple-structs/src/main.rs        |   7 ++
 .../no-listing-02-reference-in-struct/Cargo.lock   |   6 ++
 .../no-listing-02-reference-in-struct/Cargo.toml   |   8 ++
 .../no-listing-02-reference-in-struct/output.txt   |  31 ++++++
 .../no-listing-02-reference-in-struct/src/main.rs  |  15 +++
 .../no-listing-03-associated-functions/Cargo.lock  |   5 +
 .../no-listing-03-associated-functions/Cargo.toml  |   6 ++
 .../no-listing-03-associated-functions/src/main.rs |  20 ++++
 .../no-listing-04-unit-like-structs/Cargo.lock     |   7 ++
 .../no-listing-04-unit-like-structs/Cargo.toml     |   6 ++
 .../no-listing-04-unit-like-structs/src/main.rs    |   5 +
 .../no-listing-05-dbg-macro/Cargo.lock             |   5 +
 .../no-listing-05-dbg-macro/Cargo.toml             |   6 ++
 .../no-listing-05-dbg-macro/output.txt             |   9 ++
 .../no-listing-05-dbg-macro/src/main.rs            |  15 +++
 .../Cargo.lock                                     |   5 +
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  24 +++++
 .../output-only-01-debug/Cargo.lock                |   5 +
 .../output-only-01-debug/Cargo.toml                |   6 ++
 .../output-only-01-debug/output.txt                |  18 ++++
 .../output-only-01-debug/src/main.rs               |  13 +++
 .../output-only-02-pretty-debug/Cargo.lock         |   5 +
 .../output-only-02-pretty-debug/Cargo.toml         |   6 ++
 .../output-only-02-pretty-debug/output.txt         |   8 ++
 .../output-only-02-pretty-debug/src/main.rs        |  14 +++
 .../listing-06-01/Cargo.lock                       |   6 ++
 .../listing-06-01/Cargo.toml                       |   6 ++
 .../listing-06-01/src/main.rs                      |  23 +++++
 .../listing-06-02/Cargo.lock                       |   6 ++
 .../listing-06-02/Cargo.toml                       |   6 ++
 .../listing-06-02/src/main.rs                      |  10 ++
 .../listing-06-03/Cargo.lock                       |   6 ++
 .../listing-06-03/Cargo.toml                       |   6 ++
 .../listing-06-03/src/main.rs                      |  19 ++++
 .../listing-06-04/Cargo.lock                       |   6 ++
 .../listing-06-04/Cargo.toml                       |   6 ++
 .../listing-06-04/src/main.rs                      |  17 ++++
 .../listing-06-05/Cargo.lock                       |   6 ++
 .../listing-06-05/Cargo.toml                       |   6 ++
 .../listing-06-05/src/main.rs                      |  18 ++++
 .../listing-06-06/Cargo.lock                       |   6 ++
 .../listing-06-06/Cargo.toml                       |   6 ++
 .../listing-06-06/src/main.rs                      |   9 ++
 .../no-listing-01-defining-enums/Cargo.lock        |   6 ++
 .../no-listing-01-defining-enums/Cargo.toml        |   6 ++
 .../no-listing-01-defining-enums/src/main.rs       |  22 ++++
 .../no-listing-02-enum-with-data/Cargo.lock        |   6 ++
 .../no-listing-02-enum-with-data/Cargo.toml        |   6 ++
 .../no-listing-02-enum-with-data/src/main.rs       |  12 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  12 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  11 ++
 .../no-listing-05-methods-on-enums/Cargo.lock      |   6 ++
 .../no-listing-05-methods-on-enums/Cargo.toml      |   6 ++
 .../no-listing-05-methods-on-enums/src/main.rs     |  19 ++++
 .../no-listing-06-option-examples/Cargo.lock       |   6 ++
 .../no-listing-06-option-examples/Cargo.toml       |   6 ++
 .../no-listing-06-option-examples/src/main.rs      |   8 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  22 ++++
 .../src/main.rs                                    |   8 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  22 ++++
 .../no-listing-09-variable-in-pattern/Cargo.lock   |   6 ++
 .../no-listing-09-variable-in-pattern/Cargo.toml   |   6 ++
 .../no-listing-09-variable-in-pattern/src/main.rs  |  31 ++++++
 .../no-listing-10-non-exhaustive-match/Cargo.lock  |   6 ++
 .../no-listing-10-non-exhaustive-match/Cargo.toml  |   6 ++
 .../no-listing-10-non-exhaustive-match/output.txt  |  18 ++++
 .../no-listing-10-non-exhaustive-match/src/main.rs |  13 +++
 .../no-listing-12-if-let/Cargo.lock                |   6 ++
 .../no-listing-12-if-let/Cargo.toml                |   6 ++
 .../no-listing-12-if-let/src/main.rs               |   8 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  24 +++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  25 +++++
 .../no-listing-15-binding-catchall/Cargo.lock      |   6 ++
 .../no-listing-15-binding-catchall/Cargo.toml      |   6 ++
 .../no-listing-15-binding-catchall/src/main.rs     |  14 +++
 .../no-listing-16-underscore-catchall/Cargo.lock   |   6 ++
 .../no-listing-16-underscore-catchall/Cargo.toml   |   6 ++
 .../no-listing-16-underscore-catchall/src/main.rs  |  14 +++
 .../no-listing-17-underscore-unit/Cargo.lock       |   6 ++
 .../no-listing-17-underscore-unit/Cargo.toml       |   6 ++
 .../no-listing-17-underscore-unit/src/main.rs      |  13 +++
 .../listing-07-01/Cargo.lock                       |   6 ++
 .../listing-07-01/Cargo.toml                       |   6 ++
 .../listing-07-01/src/lib.rs                       |  15 +++
 .../listing-07-03/Cargo.lock                       |   6 ++
 .../listing-07-03/Cargo.toml                       |   6 ++
 .../listing-07-03/output.txt                       |  28 +++++
 .../listing-07-03/src/lib.rs                       |  13 +++
 .../listing-07-05/Cargo.lock                       |   6 ++
 .../listing-07-05/Cargo.toml                       |   6 ++
 .../listing-07-05/output.txt                       |  28 +++++
 .../listing-07-05/src/lib.rs                       |  13 +++
 .../listing-07-07/Cargo.lock                       |   6 ++
 .../listing-07-07/Cargo.toml                       |   6 ++
 .../listing-07-07/src/lib.rs                       |  13 +++
 .../listing-07-08/Cargo.lock                       |   6 ++
 .../listing-07-08/Cargo.toml                       |   6 ++
 .../listing-07-08/src/lib.rs                       |  10 ++
 .../listing-07-09/Cargo.lock                       |   6 ++
 .../listing-07-09/Cargo.toml                       |   6 ++
 .../listing-07-09/src/lib.rs                       |  27 +++++
 .../listing-07-10/Cargo.lock                       |   6 ++
 .../listing-07-10/Cargo.toml                       |   6 ++
 .../listing-07-10/src/lib.rs                       |  11 ++
 .../listing-07-11/Cargo.lock                       |   6 ++
 .../listing-07-11/Cargo.toml                       |   6 ++
 .../listing-07-11/src/lib.rs                       |  11 ++
 .../listing-07-12/Cargo.lock                       |   6 ++
 .../listing-07-12/Cargo.toml                       |   6 ++
 .../listing-07-12/output.txt                       |  19 ++++
 .../listing-07-12/src/lib.rs                       |  13 +++
 .../listing-07-13/Cargo.lock                       |   6 ++
 .../listing-07-13/Cargo.toml                       |   6 ++
 .../listing-07-13/src/lib.rs                       |  11 ++
 .../listing-07-14/Cargo.lock                       |   6 ++
 .../listing-07-14/Cargo.toml                       |   6 ++
 .../listing-07-14/src/main.rs                      |   6 ++
 .../listing-07-15/Cargo.lock                       |   6 ++
 .../listing-07-15/Cargo.toml                       |   6 ++
 .../listing-07-15/src/lib.rs                       |  18 ++++
 .../listing-07-16/Cargo.lock                       |   6 ++
 .../listing-07-16/Cargo.toml                       |   6 ++
 .../listing-07-16/src/lib.rs                       |  18 ++++
 .../listing-07-17/Cargo.lock                       |   6 ++
 .../listing-07-17/Cargo.toml                       |   6 ++
 .../listing-07-17/src/lib.rs                       |  11 ++
 .../listing-07-18/Cargo.lock                       |  83 +++++++++++++++
 .../listing-07-18/Cargo.toml                       |   7 ++
 .../listing-07-18/src/main.rs                      |  32 ++++++
 .../listing-07-19/Cargo.lock                       |   6 ++
 .../listing-07-19/Cargo.toml                       |   6 ++
 .../listing-07-19/src/lib.rs                       |   2 +
 .../listing-07-20/Cargo.lock                       |   6 ++
 .../listing-07-20/Cargo.toml                       |   6 ++
 .../listing-07-20/src/lib.rs                       |   1 +
 .../listing-07-21-and-22/Cargo.lock                |   6 ++
 .../listing-07-21-and-22/Cargo.toml                |   6 ++
 .../listing-07-21-and-22/src/front_of_house.rs     |   3 +
 .../listing-07-21-and-22/src/lib.rs                |   7 ++
 .../no-listing-01-use-std-unnested/Cargo.lock      |  83 +++++++++++++++
 .../no-listing-01-use-std-unnested/Cargo.toml      |   9 ++
 .../no-listing-01-use-std-unnested/src/main.rs     |  31 ++++++
 .../no-listing-02-extracting-hosting/Cargo.lock    |   6 ++
 .../no-listing-02-extracting-hosting/Cargo.toml    |   6 ++
 .../src/front_of_house.rs                          |   1 +
 .../src/front_of_house/hosting.rs                  |   1 +
 .../no-listing-02-extracting-hosting/src/lib.rs    |   7 ++
 .../quick-reference-example/Cargo.lock             |   7 ++
 .../quick-reference-example/Cargo.toml             |   6 ++
 .../quick-reference-example/output.txt             |   5 +
 .../quick-reference-example/src/garden.rs          |   1 +
 .../src/garden/vegetables.rs                       |   2 +
 .../quick-reference-example/src/main.rs            |   8 ++
 .../listing-08-01/Cargo.lock                       |   6 ++
 .../listing-08-01/Cargo.toml                       |   6 ++
 .../listing-08-01/src/main.rs                      |   5 +
 .../listing-08-02/Cargo.lock                       |   6 ++
 .../listing-08-02/Cargo.toml                       |   6 ++
 .../listing-08-02/src/main.rs                      |   5 +
 .../listing-08-03/Cargo.lock                       |   6 ++
 .../listing-08-03/Cargo.toml                       |   6 ++
 .../listing-08-03/src/main.rs                      |  10 ++
 .../listing-08-04/Cargo.lock                       |   6 ++
 .../listing-08-04/Cargo.toml                       |   6 ++
 .../listing-08-04/src/main.rs                      |  14 +++
 .../listing-08-05/Cargo.lock                       |   6 ++
 .../listing-08-05/Cargo.toml                       |   6 ++
 .../listing-08-05/src/main.rs                      |   8 ++
 .../listing-08-06/Cargo.lock                       |   6 ++
 .../listing-08-06/Cargo.toml                       |   6 ++
 .../listing-08-06/output.txt                       |  16 +++
 .../listing-08-06/src/main.rs                      |  11 ++
 .../listing-08-07/Cargo.lock                       |   6 ++
 .../listing-08-07/Cargo.toml                       |   6 ++
 .../listing-08-07/src/main.rs                      |   8 ++
 .../listing-08-08/Cargo.lock                       |   6 ++
 .../listing-08-08/Cargo.toml                       |   6 ++
 .../listing-08-08/src/main.rs                      |   8 ++
 .../listing-08-09/Cargo.lock                       |   6 ++
 .../listing-08-09/Cargo.toml                       |   6 ++
 .../listing-08-09/src/main.rs                      |  15 +++
 .../listing-08-10/Cargo.lock                       |   6 ++
 .../listing-08-10/Cargo.toml                       |   6 ++
 .../listing-08-10/src/main.rs                      |   9 ++
 .../listing-08-11/Cargo.lock                       |   6 ++
 .../listing-08-11/Cargo.toml                       |   6 ++
 .../listing-08-11/src/main.rs                      |   5 +
 .../listing-08-12/Cargo.lock                       |   6 ++
 .../listing-08-12/Cargo.toml                       |   6 ++
 .../listing-08-12/src/main.rs                      |  10 ++
 .../listing-08-13/Cargo.lock                       |   6 ++
 .../listing-08-13/Cargo.toml                       |   6 ++
 .../listing-08-13/src/main.rs                      |   5 +
 .../listing-08-14/Cargo.lock                       |   6 ++
 .../listing-08-14/Cargo.toml                       |   6 ++
 .../listing-08-14/src/main.rs                      |  19 ++++
 .../listing-08-15/Cargo.lock                       |   6 ++
 .../listing-08-15/Cargo.toml                       |   6 ++
 .../listing-08-15/src/main.rs                      |   6 ++
 .../listing-08-16/Cargo.lock                       |   6 ++
 .../listing-08-16/Cargo.toml                       |   6 ++
 .../listing-08-16/src/main.rs                      |   8 ++
 .../listing-08-17/Cargo.lock                       |   6 ++
 .../listing-08-17/Cargo.toml                       |   6 ++
 .../listing-08-17/src/main.rs                      |   6 ++
 .../listing-08-18/Cargo.lock                       |   6 ++
 .../listing-08-18/Cargo.toml                       |   6 ++
 .../listing-08-18/src/main.rs                      |   7 ++
 .../listing-08-19/Cargo.lock                       |   6 ++
 .../listing-08-19/Cargo.toml                       |   6 ++
 .../listing-08-19/output.txt                       |  20 ++++
 .../listing-08-19/src/main.rs                      |   6 ++
 .../listing-08-20/Cargo.lock                       |   6 ++
 .../listing-08-20/Cargo.toml                       |   6 ++
 .../listing-08-20/src/main.rs                      |  10 ++
 .../listing-08-21/Cargo.lock                       |   6 ++
 .../listing-08-21/Cargo.toml                       |   6 ++
 .../listing-08-21/src/main.rs                      |  13 +++
 .../listing-08-22/Cargo.lock                       |   6 ++
 .../listing-08-22/Cargo.toml                       |   6 ++
 .../listing-08-22/src/main.rs                      |  13 +++
 .../listing-08-23/Cargo.lock                       |   6 ++
 .../listing-08-23/Cargo.toml                       |   6 ++
 .../listing-08-23/src/main.rs                      |  12 +++
 .../listing-08-24/Cargo.lock                       |   6 ++
 .../listing-08-24/Cargo.toml                       |   6 ++
 .../listing-08-24/src/main.rs                      |  13 +++
 .../listing-08-25/Cargo.lock                       |   6 ++
 .../listing-08-25/Cargo.toml                       |   6 ++
 .../listing-08-25/src/main.rs                      |  16 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |   9 ++
 .../no-listing-02-format/Cargo.lock                |   6 ++
 .../no-listing-02-format/Cargo.toml                |   6 ++
 .../no-listing-02-format/src/main.rs               |   9 ++
 .../no-listing-03-iterate-over-hashmap/Cargo.lock  |   6 ++
 .../no-listing-03-iterate-over-hashmap/Cargo.toml  |   6 ++
 .../no-listing-03-iterate-over-hashmap/src/main.rs |  14 +++
 .../output-only-01-not-char-boundary/Cargo.lock    |   6 ++
 .../output-only-01-not-char-boundary/Cargo.toml    |   6 ++
 .../output-only-01-not-char-boundary/output.txt    |   6 ++
 .../output-only-01-not-char-boundary/src/main.rs   |   5 +
 .../ch09-error-handling/listing-09-01/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-01/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-01/output.txt   |   6 ++
 .../ch09-error-handling/listing-09-01/src/main.rs  |   5 +
 .../ch09-error-handling/listing-09-03/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-03/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-03/src/main.rs  |   5 +
 .../ch09-error-handling/listing-09-04/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-04/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-04/output.txt   |   6 ++
 .../ch09-error-handling/listing-09-04/src/main.rs  |  10 ++
 .../ch09-error-handling/listing-09-05/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-05/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-05/src/main.rs  |  19 ++++
 .../ch09-error-handling/listing-09-06/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-06/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-06/src/main.rs  |  24 +++++
 .../ch09-error-handling/listing-09-07/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-07/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-07/src/main.rs  |  16 +++
 .../ch09-error-handling/listing-09-08/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-08/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-08/src/main.rs  |  17 ++++
 .../ch09-error-handling/listing-09-09/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-09/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-09/src/main.rs  |  12 +++
 .../ch09-error-handling/listing-09-10/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-10/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-10/output.txt   |  15 +++
 .../ch09-error-handling/listing-09-10/src/main.rs  |   5 +
 .../ch09-error-handling/listing-09-11/Cargo.lock   |   7 ++
 .../ch09-error-handling/listing-09-11/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-11/src/main.rs  |  15 +++
 .../ch09-error-handling/listing-09-12/Cargo.lock   |   6 ++
 .../ch09-error-handling/listing-09-12/Cargo.toml   |   6 ++
 .../ch09-error-handling/listing-09-12/src/main.rs  |   8 ++
 .../ch09-error-handling/listing-09-13/Cargo.lock   |  83 +++++++++++++++
 .../ch09-error-handling/listing-09-13/Cargo.toml   |   7 ++
 .../ch09-error-handling/listing-09-13/src/main.rs  |  55 ++++++++++
 .../no-listing-01-panic/Cargo.lock                 |   6 ++
 .../no-listing-01-panic/Cargo.toml                 |   6 ++
 .../no-listing-01-panic/output.txt                 |   6 ++
 .../no-listing-01-panic/src/main.rs                |   3 +
 .../no-listing-04-unwrap/Cargo.lock                |   6 ++
 .../no-listing-04-unwrap/Cargo.toml                |   6 ++
 .../no-listing-04-unwrap/src/main.rs               |   5 +
 .../no-listing-05-expect/Cargo.lock                |   6 ++
 .../no-listing-05-expect/Cargo.toml                |   6 ++
 .../no-listing-05-expect/src/main.rs               |   6 ++
 .../no-listing-08-unwrap-that-cant-fail/Cargo.lock |   6 ++
 .../no-listing-08-unwrap-that-cant-fail/Cargo.toml |   6 ++
 .../src/main.rs                                    |   9 ++
 .../no-listing-09-guess-out-of-range/Cargo.lock    |  83 +++++++++++++++
 .../no-listing-09-guess-out-of-range/Cargo.toml    |   7 ++
 .../no-listing-09-guess-out-of-range/src/main.rs   |  47 +++++++++
 .../listing-10-01/Cargo.lock                       |   6 ++
 .../listing-10-01/Cargo.toml                       |   6 ++
 .../listing-10-01/src/main.rs                      |  18 ++++
 .../listing-10-02/Cargo.lock                       |   6 ++
 .../listing-10-02/Cargo.toml                       |   6 ++
 .../listing-10-02/src/main.rs                      |  25 +++++
 .../listing-10-03/Cargo.lock                       |   6 ++
 .../listing-10-03/Cargo.toml                       |   6 ++
 .../listing-10-03/src/main.rs                      |  31 ++++++
 .../listing-10-04/Cargo.lock                       |   6 ++
 .../listing-10-04/Cargo.toml                       |   6 ++
 .../listing-10-04/src/main.rs                      |  43 ++++++++
 .../listing-10-05/Cargo.lock                       |   6 ++
 .../listing-10-05/Cargo.toml                       |   6 ++
 .../listing-10-05/output.txt                       |  17 ++++
 .../listing-10-05/src/main.rs                      |  23 +++++
 .../listing-10-06/Cargo.lock                       |   6 ++
 .../listing-10-06/Cargo.toml                       |   6 ++
 .../listing-10-06/src/main.rs                      |   9 ++
 .../listing-10-07/Cargo.lock                       |   6 ++
 .../listing-10-07/Cargo.toml                       |   6 ++
 .../listing-10-07/output.txt                       |  10 ++
 .../listing-10-07/src/main.rs                      |   8 ++
 .../listing-10-08/Cargo.lock                       |   6 ++
 .../listing-10-08/Cargo.toml                       |   6 ++
 .../listing-10-08/src/main.rs                      |  10 ++
 .../listing-10-09/Cargo.lock                       |   6 ++
 .../listing-10-09/Cargo.toml                       |   6 ++
 .../listing-10-09/src/main.rs                      |  16 +++
 .../listing-10-10/Cargo.lock                       |   6 ++
 .../listing-10-10/Cargo.toml                       |   6 ++
 .../listing-10-10/src/main.rs                      |  24 +++++
 .../listing-10-11/Cargo.lock                       |   6 ++
 .../listing-10-11/Cargo.toml                       |   6 ++
 .../listing-10-11/src/main.rs                      |  22 ++++
 .../listing-10-12/Cargo.lock                       |   7 ++
 .../listing-10-12/Cargo.toml                       |   6 ++
 .../listing-10-12/src/lib.rs                       |   3 +
 .../listing-10-13/Cargo.lock                       |   7 ++
 .../listing-10-13/Cargo.toml                       |   6 ++
 .../listing-10-13/src/lib.rs                       |  31 ++++++
 .../listing-10-14/Cargo.lock                       |   7 ++
 .../listing-10-14/Cargo.toml                       |   6 ++
 .../listing-10-14/src/lib.rs                       |  29 ++++++
 .../listing-10-15/Cargo.lock                       |   6 ++
 .../listing-10-15/Cargo.toml                       |   6 ++
 .../listing-10-15/src/lib.rs                       |  22 ++++
 .../listing-10-16/Cargo.lock                       |   6 ++
 .../listing-10-16/Cargo.toml                       |   6 ++
 .../listing-10-16/output.txt                       |  15 +++
 .../listing-10-16/src/main.rs                      |  10 ++
 .../listing-10-17/Cargo.lock                       |   4 +
 .../listing-10-17/Cargo.toml                       |   6 ++
 .../listing-10-17/rustfmt-ignore                   |   3 +
 .../listing-10-17/src/main.rs                      |  10 ++
 .../listing-10-18/Cargo.lock                       |   4 +
 .../listing-10-18/Cargo.toml                       |   6 ++
 .../listing-10-18/rustfmt-ignore                   |   3 +
 .../listing-10-18/src/main.rs                      |   8 ++
 .../listing-10-19/Cargo.lock                       |   6 ++
 .../listing-10-19/Cargo.toml                       |   6 ++
 .../listing-10-19/src/main.rs                      |   7 ++
 .../listing-10-20/Cargo.lock                       |   6 ++
 .../listing-10-20/Cargo.toml                       |   6 ++
 .../listing-10-20/output.txt                       |  16 +++
 .../listing-10-20/src/main.rs                      |  17 ++++
 .../listing-10-21/Cargo.lock                       |   6 ++
 .../listing-10-21/Cargo.toml                       |   6 ++
 .../listing-10-21/src/main.rs                      |  17 ++++
 .../listing-10-22/Cargo.lock                       |   6 ++
 .../listing-10-22/Cargo.toml                       |   6 ++
 .../listing-10-22/src/main.rs                      |  19 ++++
 .../listing-10-23/Cargo.lock                       |   6 ++
 .../listing-10-23/Cargo.toml                       |   6 ++
 .../listing-10-23/output.txt                       |  14 +++
 .../listing-10-23/src/main.rs                      |  19 ++++
 .../listing-10-24/Cargo.lock                       |   6 ++
 .../listing-10-24/Cargo.toml                       |   6 ++
 .../listing-10-24/src/main.rs                      |  11 ++
 .../listing-10-25/Cargo.lock                       |   6 ++
 .../listing-10-25/Cargo.toml                       |   6 ++
 .../listing-10-25/src/main.rs                      |  29 ++++++
 .../no-listing-01-calling-trait-method/Cargo.lock  |   7 ++
 .../no-listing-01-calling-trait-method/Cargo.toml  |   6 ++
 .../no-listing-01-calling-trait-method/src/lib.rs  |  29 ++++++
 .../no-listing-01-calling-trait-method/src/main.rs |  14 +++
 .../no-listing-02-calling-default-impl/Cargo.lock  |   7 ++
 .../no-listing-02-calling-default-impl/Cargo.toml  |   6 ++
 .../no-listing-02-calling-default-impl/src/lib.rs  |  27 +++++
 .../no-listing-02-calling-default-impl/src/main.rs |  17 ++++
 .../Cargo.lock                                     |   7 ++
 .../Cargo.toml                                     |   6 ++
 .../src/lib.rs                                     |  24 +++++
 .../src/main.rs                                    |  16 +++
 .../no-listing-04-traits-as-parameters/Cargo.lock  |   7 ++
 .../no-listing-04-traits-as-parameters/Cargo.toml  |   6 ++
 .../no-listing-04-traits-as-parameters/src/lib.rs  |  35 +++++++
 .../no-listing-05-returning-impl-trait/Cargo.lock  |   7 ++
 .../no-listing-05-returning-impl-trait/Cargo.toml  |   6 ++
 .../no-listing-05-returning-impl-trait/src/lib.rs  |  42 ++++++++
 .../Cargo.lock                                     |   7 ++
 .../Cargo.toml                                     |   6 ++
 .../src/lib.rs                                     |  56 ++++++++++
 .../no-listing-07-where-clause/Cargo.toml          |   8 ++
 .../no-listing-07-where-clause/src/lib.rs          |   9 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  13 +++
 .../no-listing-09-unrelated-lifetime/Cargo.lock    |   6 ++
 .../no-listing-09-unrelated-lifetime/Cargo.toml    |   6 ++
 .../no-listing-09-unrelated-lifetime/output.txt    |  10 ++
 .../no-listing-09-unrelated-lifetime/src/main.rs   |  14 +++
 .../no-listing-10-lifetimes-on-methods/Cargo.lock  |   6 ++
 .../no-listing-10-lifetimes-on-methods/Cargo.toml  |   6 ++
 .../no-listing-10-lifetimes-on-methods/src/main.rs |  28 +++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  31 ++++++
 .../listing-11-01/Cargo.lock                       |   6 ++
 .../listing-11-01/Cargo.toml                       |   6 ++
 .../listing-11-01/output.txt                       |  16 +++
 .../listing-11-01/src/lib.rs                       |   8 ++
 .../listing-11-03/Cargo.lock                       |   6 ++
 .../listing-11-03/Cargo.toml                       |   6 ++
 .../listing-11-03/output.txt                       |  22 ++++
 .../listing-11-03/src/lib.rs                       |  14 +++
 .../listing-11-05/Cargo.lock                       |   6 ++
 .../listing-11-05/Cargo.toml                       |   6 ++
 .../listing-11-05/src/lib.rs                       |  13 +++
 .../listing-11-06/Cargo.lock                       |   6 ++
 .../listing-11-06/Cargo.toml                       |   6 ++
 .../listing-11-06/output.txt                       |  16 +++
 .../listing-11-06/src/lib.rs                       |  32 ++++++
 .../listing-11-07/Cargo.lock                       |   6 ++
 .../listing-11-07/Cargo.toml                       |   6 ++
 .../listing-11-07/output.txt                       |  16 +++
 .../listing-11-07/src/lib.rs                       |  13 +++
 .../listing-11-08/Cargo.lock                       |   6 ++
 .../listing-11-08/Cargo.toml                       |   6 ++
 .../listing-11-08/output.txt                       |  16 +++
 .../listing-11-08/src/lib.rs                       |  24 +++++
 .../listing-11-09/Cargo.lock                       |   6 ++
 .../listing-11-09/Cargo.toml                       |   6 ++
 .../listing-11-09/src/lib.rs                       |  36 +++++++
 .../listing-11-10/Cargo.lock                       |   6 ++
 .../listing-11-10/Cargo.toml                       |   6 ++
 .../listing-11-10/output.txt                       |  25 +++++
 .../listing-11-10/src/lib.rs                       |  21 ++++
 .../listing-11-11/Cargo.lock                       |   6 ++
 .../listing-11-11/Cargo.toml                       |   6 ++
 .../listing-11-11/output.txt                       |  18 ++++
 .../listing-11-11/src/lib.rs                       |  23 +++++
 .../listing-11-12/Cargo.lock                       |   6 ++
 .../listing-11-12/Cargo.toml                       |   6 ++
 .../listing-11-12/src/lib.rs                       |  17 ++++
 .../listing-11-13/Cargo.lock                       |   6 ++
 .../listing-11-13/Cargo.toml                       |   6 ++
 .../listing-11-13/output.txt                       |  23 +++++
 .../listing-11-13/src/lib.rs                       |  17 ++++
 .../listing-11-13/tests/integration_test.rs        |   6 ++
 .../no-listing-01-changing-test-name/Cargo.lock    |   6 ++
 .../no-listing-01-changing-test-name/Cargo.toml    |   6 ++
 .../no-listing-01-changing-test-name/output.txt    |  16 +++
 .../no-listing-01-changing-test-name/src/lib.rs    |   7 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  17 ++++
 .../src/lib.rs                                     |  49 +++++++++
 .../no-listing-03-introducing-a-bug/Cargo.lock     |   6 ++
 .../no-listing-03-introducing-a-bug/Cargo.toml     |   6 ++
 .../no-listing-03-introducing-a-bug/output.txt     |  22 ++++
 .../no-listing-03-introducing-a-bug/src/lib.rs     |  47 +++++++++
 .../no-listing-04-bug-in-add-two/Cargo.lock        |   6 ++
 .../no-listing-04-bug-in-add-two/Cargo.toml        |   6 ++
 .../no-listing-04-bug-in-add-two/output.txt        |  23 +++++
 .../no-listing-04-bug-in-add-two/src/lib.rs        |  15 +++
 .../no-listing-05-greeter/Cargo.lock               |   6 ++
 .../no-listing-05-greeter/Cargo.toml               |   6 ++
 .../no-listing-05-greeter/src/lib.rs               |  14 +++
 .../no-listing-06-greeter-with-bug/Cargo.lock      |   6 ++
 .../no-listing-06-greeter-with-bug/Cargo.toml      |   6 ++
 .../no-listing-06-greeter-with-bug/output.txt      |  21 ++++
 .../no-listing-06-greeter-with-bug/src/lib.rs      |  16 +++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  21 ++++
 .../src/lib.rs                                     |  20 ++++
 .../no-listing-08-guess-with-bug/Cargo.lock        |   6 ++
 .../no-listing-08-guess-with-bug/Cargo.toml        |   6 ++
 .../no-listing-08-guess-with-bug/output.txt        |  19 ++++
 .../no-listing-08-guess-with-bug/src/lib.rs        |  27 +++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  23 +++++
 .../src/lib.rs                                     |  34 +++++++
 .../no-listing-10-result-in-tests/Cargo.lock       |   6 ++
 .../no-listing-10-result-in-tests/Cargo.toml       |   6 ++
 .../no-listing-10-result-in-tests/src/lib.rs       |  11 ++
 .../no-listing-11-ignore-a-test/Cargo.lock         |   6 ++
 .../no-listing-11-ignore-a-test/Cargo.toml         |   6 ++
 .../no-listing-11-ignore-a-test/output.txt         |  17 ++++
 .../no-listing-11-ignore-a-test/src/lib.rs         |  10 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  29 ++++++
 .../src/lib.rs                                     |  17 ++++
 .../tests/common.rs                                |   3 +
 .../tests/integration_test.rs                      |   6 ++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/lib.rs                                     |  17 ++++
 .../tests/common/mod.rs                            |   3 +
 .../tests/integration_test.rs                      |   9 ++
 .../output-only-01-show-output/Cargo.lock          |   6 ++
 .../output-only-01-show-output/Cargo.toml          |   6 ++
 .../output-only-01-show-output/output.txt          |  34 +++++++
 .../output-only-01-show-output/src/lib.rs          |  21 ++++
 .../output-only-02-single-test/Cargo.lock          |   6 ++
 .../output-only-02-single-test/Cargo.toml          |   6 ++
 .../output-only-02-single-test/output.txt          |  10 ++
 .../output-only-02-single-test/src/lib.rs          |  23 +++++
 .../output-only-03-multiple-tests/Cargo.lock       |   6 ++
 .../output-only-03-multiple-tests/Cargo.toml       |   6 ++
 .../output-only-03-multiple-tests/output.txt       |  11 ++
 .../output-only-03-multiple-tests/src/lib.rs       |  23 +++++
 .../output-only-04-running-ignored/Cargo.lock      |   6 ++
 .../output-only-04-running-ignored/Cargo.toml      |   6 ++
 .../output-only-04-running-ignored/output.txt      |  16 +++
 .../output-only-04-running-ignored/src/lib.rs      |  12 +++
 .../output-only-05-single-integration/Cargo.lock   |   6 ++
 .../output-only-05-single-integration/Cargo.toml   |   6 ++
 .../output-only-05-single-integration/output.txt   |  10 ++
 .../output-only-05-single-integration/src/lib.rs   |  17 ++++
 .../tests/integration_test.rs                      |   6 ++
 .../ch12-an-io-project/listing-12-01/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-01/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-01/output.txt    |   7 ++
 .../ch12-an-io-project/listing-12-01/src/main.rs   |   6 ++
 .../ch12-an-io-project/listing-12-02/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-02/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-02/output.txt    |   6 ++
 .../ch12-an-io-project/listing-12-02/src/main.rs   |  11 ++
 .../ch12-an-io-project/listing-12-03/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-03/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-03/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-03/src/main.rs   |  11 ++
 .../ch12-an-io-project/listing-12-04/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-04/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-04/output.txt    |  17 ++++
 .../ch12-an-io-project/listing-12-04/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-04/src/main.rs   |  22 ++++
 .../ch12-an-io-project/listing-12-05/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-05/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-05/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-05/src/main.rs   |  29 ++++++
 .../ch12-an-io-project/listing-12-06/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-06/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-06/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-06/src/main.rs   |  34 +++++++
 .../ch12-an-io-project/listing-12-07/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-07/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-07/output.txt    |   6 ++
 .../ch12-an-io-project/listing-12-07/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-07/src/main.rs   |  40 ++++++++
 .../ch12-an-io-project/listing-12-08/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-08/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-08/output.txt    |   6 ++
 .../ch12-an-io-project/listing-12-08/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-08/src/main.rs   |  38 +++++++
 .../ch12-an-io-project/listing-12-09/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-09/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-09/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-09/src/main.rs   |  36 +++++++
 .../ch12-an-io-project/listing-12-10/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-10/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-10/output.txt    |   5 +
 .../ch12-an-io-project/listing-12-10/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-10/src/main.rs   |  42 ++++++++
 .../ch12-an-io-project/listing-12-11/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-11/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-11/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-11/src/main.rs   |  50 +++++++++
 .../ch12-an-io-project/listing-12-12/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-12/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-12/output.txt    |  27 +++++
 .../ch12-an-io-project/listing-12-12/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-12/src/main.rs   |  51 ++++++++++
 .../ch12-an-io-project/listing-12-13/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-13/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-13/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-13/src/lib.rs    |  36 +++++++
 .../ch12-an-io-project/listing-12-13/src/main.rs   |  19 ++++
 .../ch12-an-io-project/listing-12-14/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-14/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-14/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-14/src/lib.rs    |  28 +++++
 .../ch12-an-io-project/listing-12-14/src/main.rs   |  29 ++++++
 .../ch12-an-io-project/listing-12-15/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-15/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-15/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-15/src/lib.rs    |  44 ++++++++
 .../ch12-an-io-project/listing-12-15/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-16/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-16/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-16/output.txt    |  23 +++++
 .../ch12-an-io-project/listing-12-16/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-16/src/lib.rs    |  48 +++++++++
 .../ch12-an-io-project/listing-12-16/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-17/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-17/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-17/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-17/src/lib.rs    |  50 +++++++++
 .../ch12-an-io-project/listing-12-17/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-18/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-18/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-18/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-18/src/lib.rs    |  52 ++++++++++
 .../ch12-an-io-project/listing-12-18/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-19/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-19/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-19/output.txt    |  22 ++++
 .../ch12-an-io-project/listing-12-19/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-19/src/lib.rs    |  58 +++++++++++
 .../ch12-an-io-project/listing-12-19/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-20/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-20/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-20/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-20/src/lib.rs    |  76 ++++++++++++++
 .../ch12-an-io-project/listing-12-20/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-21/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-21/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-21/output.txt    |  23 +++++
 .../ch12-an-io-project/listing-12-21/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-21/src/lib.rs    |  92 +++++++++++++++++
 .../ch12-an-io-project/listing-12-21/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-22/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-22/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-22/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-22/src/lib.rs    | 101 ++++++++++++++++++
 .../ch12-an-io-project/listing-12-22/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-23/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-23/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-23/output.txt    |   6 ++
 .../ch12-an-io-project/listing-12-23/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-23/src/lib.rs    | 110 ++++++++++++++++++++
 .../ch12-an-io-project/listing-12-23/src/main.rs   |  18 ++++
 .../ch12-an-io-project/listing-12-24/Cargo.lock    |   6 ++
 .../ch12-an-io-project/listing-12-24/Cargo.toml    |   6 ++
 .../ch12-an-io-project/listing-12-24/poem.txt      |   9 ++
 .../ch12-an-io-project/listing-12-24/src/lib.rs    | 104 +++++++++++++++++++
 .../ch12-an-io-project/listing-12-24/src/main.rs   |  20 ++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../no-listing-01-handling-errors-in-main/poem.txt |   9 ++
 .../src/main.rs                                    |  53 ++++++++++
 .../no-listing-02-using-search-in-run/Cargo.lock   |   6 ++
 .../no-listing-02-using-search-in-run/Cargo.toml   |   6 ++
 .../no-listing-02-using-search-in-run/output.txt   |   5 +
 .../no-listing-02-using-search-in-run/poem.txt     |   9 ++
 .../no-listing-02-using-search-in-run/src/lib.rs   |  60 +++++++++++
 .../no-listing-02-using-search-in-run/src/main.rs  |  18 ++++
 .../output-only-01-with-args/Cargo.lock            |   6 ++
 .../output-only-01-with-args/Cargo.toml            |   6 ++
 .../output-only-01-with-args/output.txt            |   9 ++
 .../output-only-01-with-args/src/main.rs           |   6 ++
 .../output-only-02-missing-lifetimes/Cargo.lock    |   6 ++
 .../output-only-02-missing-lifetimes/Cargo.toml    |   6 ++
 .../output-only-02-missing-lifetimes/output.txt    |  16 +++
 .../output-only-02-missing-lifetimes/poem.txt      |   9 ++
 .../output-only-02-missing-lifetimes/src/lib.rs    |  48 +++++++++
 .../output-only-02-missing-lifetimes/src/main.rs   |  18 ++++
 .../output-only-03-multiple-matches/Cargo.lock     |   6 ++
 .../output-only-03-multiple-matches/Cargo.toml     |   6 ++
 .../output-only-03-multiple-matches/output.txt     |   7 ++
 .../output-only-03-multiple-matches/poem.txt       |   9 ++
 .../output-only-03-multiple-matches/src/lib.rs     |  60 +++++++++++
 .../output-only-03-multiple-matches/src/main.rs    |  18 ++++
 .../output-only-04-no-matches/Cargo.lock           |   6 ++
 .../output-only-04-no-matches/Cargo.toml           |   6 ++
 .../output-only-04-no-matches/output.txt           |   4 +
 .../output-only-04-no-matches/poem.txt             |   9 ++
 .../output-only-04-no-matches/src/lib.rs           |  60 +++++++++++
 .../output-only-04-no-matches/src/main.rs          |  18 ++++
 .../listing-12-23-reproduced/Cargo.lock            |   6 ++
 .../listing-12-23-reproduced/Cargo.toml            |   6 ++
 .../listing-12-23-reproduced/poem.txt              |   9 ++
 .../listing-12-23-reproduced/src/lib.rs            | 106 +++++++++++++++++++
 .../listing-12-23-reproduced/src/main.rs           |  18 ++++
 .../listing-12-24-reproduced/Cargo.lock            |   6 ++
 .../listing-12-24-reproduced/Cargo.toml            |   6 ++
 .../listing-12-24-reproduced/poem.txt              |   9 ++
 .../listing-12-24-reproduced/src/lib.rs            | 104 +++++++++++++++++++
 .../listing-12-24-reproduced/src/main.rs           |  24 +++++
 .../listing-13-01/Cargo.lock                       |   7 ++
 .../listing-13-01/Cargo.toml                       |   6 ++
 .../listing-13-01/output.txt                       |   6 ++
 .../listing-13-01/src/main.rs                      |  52 ++++++++++
 .../listing-13-02/Cargo.lock                       |   6 ++
 .../listing-13-02/Cargo.toml                       |   6 ++
 .../listing-13-02/src/main.rs                      |  33 ++++++
 .../listing-13-03/Cargo.lock                       |   6 ++
 .../listing-13-03/Cargo.toml                       |   6 ++
 .../listing-13-03/output.txt                       |  12 +++
 .../listing-13-03/src/main.rs                      |   8 ++
 .../listing-13-04/Cargo.lock                       |   6 ++
 .../listing-13-04/Cargo.toml                       |   6 ++
 .../listing-13-04/output.txt                       |   8 ++
 .../listing-13-04/src/main.rs                      |  10 ++
 .../listing-13-05/Cargo.lock                       |   6 ++
 .../listing-13-05/Cargo.toml                       |   6 ++
 .../listing-13-05/output.txt                       |   6 ++
 .../listing-13-05/src/main.rs                      |   9 ++
 .../listing-13-06/Cargo.toml                       |   8 ++
 .../listing-13-06/src/main.rs                      |  10 ++
 .../listing-13-07/.rustfmt.toml                    |   2 +
 .../listing-13-07/Cargo.toml                       |   6 ++
 .../listing-13-07/output.txt                       |  18 ++++
 .../listing-13-07/src/main.rs                      |  16 +++
 .../listing-13-08/.rustfmt.toml                    |   2 +
 .../listing-13-08/Cargo.toml                       |   8 ++
 .../listing-13-08/output.txt                       |  18 ++++
 .../listing-13-08/src/main.rs                      |  22 ++++
 .../listing-13-09/.rustfmt.toml                    |   2 +
 .../listing-13-09/Cargo.lock                       |   6 ++
 .../listing-13-09/Cargo.toml                       |   6 ++
 .../listing-13-09/src/main.rs                      |  20 ++++
 .../listing-13-10/Cargo.lock                       |   6 ++
 .../listing-13-10/Cargo.toml                       |   6 ++
 .../listing-13-10/src/main.rs                      |   7 ++
 .../listing-13-11/Cargo.lock                       |   6 ++
 .../listing-13-11/Cargo.toml                       |   6 ++
 .../listing-13-11/src/main.rs                      |  11 ++
 .../listing-13-12/Cargo.lock                       |   6 ++
 .../listing-13-12/Cargo.toml                       |   6 ++
 .../listing-13-12/src/lib.rs                       |  16 +++
 .../listing-13-13/Cargo.lock                       |   6 ++
 .../listing-13-13/Cargo.toml                       |   6 ++
 .../listing-13-13/src/lib.rs                       |  15 +++
 .../listing-13-14/Cargo.lock                       |   6 ++
 .../listing-13-14/Cargo.toml                       |   6 ++
 .../listing-13-14/output.txt                       |  14 +++
 .../listing-13-14/src/main.rs                      |   7 ++
 .../listing-13-15/Cargo.lock                       |   6 ++
 .../listing-13-15/Cargo.toml                       |   6 ++
 .../listing-13-15/src/main.rs                      |   9 ++
 .../listing-13-16/Cargo.lock                       |   6 ++
 .../listing-13-16/Cargo.toml                       |   6 ++
 .../listing-13-16/src/lib.rs                       |  48 +++++++++
 .../listing-13-18/Cargo.lock                       |   6 ++
 .../listing-13-18/Cargo.toml                       |   6 ++
 .../listing-13-18/poem.txt                         |   9 ++
 .../listing-13-18/src/lib.rs                       | 104 +++++++++++++++++++
 .../listing-13-18/src/main.rs                      |  22 ++++
 .../listing-13-19/Cargo.lock                       |   6 ++
 .../listing-13-19/Cargo.toml                       |   6 ++
 .../listing-13-19/poem.txt                         |   9 ++
 .../listing-13-19/src/lib.rs                       | 109 ++++++++++++++++++++
 .../listing-13-19/src/main.rs                      |  16 +++
 .../listing-13-20/Cargo.lock                       |   6 ++
 .../listing-13-20/Cargo.toml                       |   6 ++
 .../listing-13-20/poem.txt                         |   9 ++
 .../listing-13-20/src/lib.rs                       | 113 +++++++++++++++++++++
 .../listing-13-20/src/main.rs                      |  16 +++
 .../listing-13-22/Cargo.lock                       |   6 ++
 .../listing-13-22/Cargo.toml                       |   6 ++
 .../listing-13-22/poem.txt                         |   9 ++
 .../listing-13-22/src/lib.rs                       | 108 ++++++++++++++++++++
 .../listing-13-22/src/main.rs                      |  16 +++
 .../ch14-more-about-cargo/listing-14-01/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-01/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-01/src/lib.rs |  13 +++
 .../ch14-more-about-cargo/listing-14-02/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-02/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-02/src/lib.rs |  21 ++++
 .../ch14-more-about-cargo/listing-14-03/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-03/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-03/src/lib.rs |  34 +++++++
 .../ch14-more-about-cargo/listing-14-04/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-04/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-04/src/lib.rs |  29 ++++++
 .../listing-14-04/src/main.rs                      |   8 ++
 .../ch14-more-about-cargo/listing-14-05/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-05/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-05/src/lib.rs |  41 ++++++++
 .../ch14-more-about-cargo/listing-14-06/Cargo.lock |   6 ++
 .../ch14-more-about-cargo/listing-14-06/Cargo.toml |   6 ++
 .../ch14-more-about-cargo/listing-14-06/src/lib.rs |  33 ++++++
 .../listing-14-06/src/main.rs                      |  13 +++
 .../listing-14-07/add/Cargo.lock                   |  13 +++
 .../listing-14-07/add/Cargo.toml                   |   6 ++
 .../listing-14-07/add/add_one/Cargo.toml           |   6 ++
 .../listing-14-07/add/add_one/src/lib.rs           |   3 +
 .../listing-14-07/add/adder/Cargo.toml             |   8 ++
 .../listing-14-07/add/adder/src/main.rs            |   6 ++
 .../add/Cargo.lock                                 |   6 ++
 .../add/Cargo.toml                                 |   5 +
 .../add/adder/Cargo.toml                           |   6 ++
 .../add/adder/src/main.rs                          |   3 +
 .../add/Cargo.lock                                 |  13 +++
 .../add/Cargo.toml                                 |   6 ++
 .../add/add_one/Cargo.toml                         |   6 ++
 .../add/add_one/src/lib.rs                         |   3 +
 .../add/adder/Cargo.toml                           |   7 ++
 .../add/adder/src/main.rs                          |   3 +
 .../add/Cargo.lock                                 |  90 ++++++++++++++++
 .../add/Cargo.toml                                 |   6 ++
 .../add/add_one/Cargo.toml                         |   7 ++
 .../add/add_one/src/lib.rs                         |   5 +
 .../add/adder/Cargo.toml                           |   8 ++
 .../add/adder/src/main.rs                          |  10 ++
 .../add/Cargo.lock                                 |  13 +++
 .../add/Cargo.toml                                 |   6 ++
 .../add/add_one/Cargo.toml                         |   6 ++
 .../add/add_one/src/lib.rs                         |  13 +++
 .../add/adder/Cargo.toml                           |   8 ++
 .../add/adder/src/main.rs                          |  10 ++
 .../output-only-01-adder-crate/add/Cargo.lock      |   5 +
 .../output-only-01-adder-crate/add/Cargo.toml      |   5 +
 .../output-only-01-adder-crate/add/rustfmt-ignore  |   2 +
 .../output-only-02-add-one/add/Cargo.lock          |  13 +++
 .../output-only-02-add-one/add/Cargo.toml          |   6 ++
 .../output-only-02-add-one/add/add_one/Cargo.toml  |   8 ++
 .../output-only-02-add-one/add/add_one/src/lib.rs  |   8 ++
 .../output-only-02-add-one/add/adder/Cargo.toml    |   8 ++
 .../output-only-02-add-one/add/adder/src/main.rs   |   3 +
 .../output-only-03-use-rand/add/Cargo.lock         |  90 ++++++++++++++++
 .../output-only-03-use-rand/add/Cargo.toml         |   6 ++
 .../output-only-03-use-rand/add/add_one/Cargo.toml |   7 ++
 .../output-only-03-use-rand/add/add_one/src/lib.rs |   5 +
 .../output-only-03-use-rand/add/adder/Cargo.toml   |   8 ++
 .../output-only-03-use-rand/add/adder/src/main.rs  |  11 ++
 .../ch15-smart-pointers/listing-15-01/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-01/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-01/src/main.rs  |   4 +
 .../ch15-smart-pointers/listing-15-02/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-02/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-02/src/main.rs  |   8 ++
 .../ch15-smart-pointers/listing-15-03/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-03/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-03/output.txt   |  27 +++++
 .../ch15-smart-pointers/listing-15-03/src/main.rs  |  12 +++
 .../ch15-smart-pointers/listing-15-05/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-05/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-05/src/main.rs  |  10 ++
 .../ch15-smart-pointers/listing-15-06/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-06/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-06/src/main.rs  |   7 ++
 .../ch15-smart-pointers/listing-15-07/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-07/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-07/src/main.rs  |   7 ++
 .../ch15-smart-pointers/listing-15-08/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-08/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-08/src/main.rs  |  11 ++
 .../ch15-smart-pointers/listing-15-09/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-09/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-09/output.txt   |  10 ++
 .../ch15-smart-pointers/listing-15-09/src/main.rs  |  17 ++++
 .../ch15-smart-pointers/listing-15-10/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-10/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-10/src/main.rs  |  27 +++++
 .../ch15-smart-pointers/listing-15-11/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-11/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-11/src/main.rs  |   7 ++
 .../ch15-smart-pointers/listing-15-12/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-12/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-12/src/main.rs  |  28 +++++
 .../ch15-smart-pointers/listing-15-13/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-13/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-13/src/main.rs  |  28 +++++
 .../ch15-smart-pointers/listing-15-14/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-14/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-14/output.txt   |   7 ++
 .../ch15-smart-pointers/listing-15-14/src/main.rs  |  19 ++++
 .../ch15-smart-pointers/listing-15-15/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-15/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-15/output.txt   |  13 +++
 .../ch15-smart-pointers/listing-15-15/src/main.rs  |  20 ++++
 .../ch15-smart-pointers/listing-15-16/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-16/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-16/output.txt   |   7 ++
 .../ch15-smart-pointers/listing-15-16/src/main.rs  |  20 ++++
 .../ch15-smart-pointers/listing-15-17/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-17/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-17/output.txt   |  14 +++
 .../ch15-smart-pointers/listing-15-17/src/main.rs  |  12 +++
 .../ch15-smart-pointers/listing-15-18/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-18/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-18/src/main.rs  |  13 +++
 .../ch15-smart-pointers/listing-15-19/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-19/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-19/output.txt   |   8 ++
 .../ch15-smart-pointers/listing-15-19/src/main.rs  |  21 ++++
 .../ch15-smart-pointers/listing-15-20/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-20/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-20/src/lib.rs   |  38 +++++++
 .../ch15-smart-pointers/listing-15-21/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-21/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-21/output.txt   |  14 +++
 .../ch15-smart-pointers/listing-15-21/src/lib.rs   |  73 +++++++++++++
 .../ch15-smart-pointers/listing-15-22/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-22/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-22/src/lib.rs   |  78 ++++++++++++++
 .../ch15-smart-pointers/listing-15-23/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-23/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-23/output.txt   |  21 ++++
 .../ch15-smart-pointers/listing-15-23/src/lib.rs   |  78 ++++++++++++++
 .../ch15-smart-pointers/listing-15-24/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-24/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-24/output.txt   |   7 ++
 .../ch15-smart-pointers/listing-15-24/src/main.rs  |  24 +++++
 .../ch15-smart-pointers/listing-15-25/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-25/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-25/src/main.rs  |  20 ++++
 .../ch15-smart-pointers/listing-15-26/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-26/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-26/output.txt   |  11 ++
 .../ch15-smart-pointers/listing-15-26/src/main.rs  |  44 ++++++++
 .../ch15-smart-pointers/listing-15-27/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-27/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-27/src/main.rs  |  24 +++++
 .../ch15-smart-pointers/listing-15-28/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-28/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-28/src/main.rs  |  33 ++++++
 .../ch15-smart-pointers/listing-15-29/Cargo.lock   |   6 ++
 .../ch15-smart-pointers/listing-15-29/Cargo.toml   |   6 ++
 .../ch15-smart-pointers/listing-15-29/src/main.rs  |  54 ++++++++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  12 +++
 .../src/main.rs                                    |   4 +
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../output.txt                                     |  23 +++++
 .../src/main.rs                                    |   7 ++
 .../listing-16-01/Cargo.lock                       |   6 ++
 .../listing-16-01/Cargo.toml                       |   6 ++
 .../listing-16-01/src/main.rs                      |  16 +++
 .../listing-16-02/Cargo.lock                       |   6 ++
 .../listing-16-02/Cargo.toml                       |   6 ++
 .../listing-16-02/src/main.rs                      |  18 ++++
 .../listing-16-03/Cargo.lock                       |   6 ++
 .../listing-16-03/Cargo.toml                       |   6 ++
 .../listing-16-03/output.txt                       |  25 +++++
 .../listing-16-03/src/main.rs                      |  11 ++
 .../listing-16-04/Cargo.lock                       |   6 ++
 .../listing-16-04/Cargo.toml                       |   6 ++
 .../listing-16-04/src/main.rs                      |  13 +++
 .../listing-16-05/Cargo.lock                       |   6 ++
 .../listing-16-05/Cargo.toml                       |   6 ++
 .../listing-16-05/src/main.rs                      |  11 ++
 .../listing-16-06/Cargo.lock                       |   6 ++
 .../listing-16-06/Cargo.toml                       |   6 ++
 .../listing-16-06/src/main.rs                      |   5 +
 .../listing-16-07/Cargo.lock                       |   6 ++
 .../listing-16-07/Cargo.toml                       |   6 ++
 .../listing-16-07/src/main.rs                      |  11 ++
 .../listing-16-08/Cargo.lock                       |   6 ++
 .../listing-16-08/Cargo.toml                       |   6 ++
 .../listing-16-08/src/main.rs                      |  14 +++
 .../listing-16-09/Cargo.lock                       |   6 ++
 .../listing-16-09/Cargo.toml                       |   6 ++
 .../listing-16-09/output.txt                       |  16 +++
 .../listing-16-09/src/main.rs                      |  15 +++
 .../listing-16-10/Cargo.lock                       |   6 ++
 .../listing-16-10/Cargo.toml                       |   6 ++
 .../listing-16-10/src/main.rs                      |  25 +++++
 .../listing-16-11/Cargo.lock                       |   6 ++
 .../listing-16-11/Cargo.toml                       |   6 ++
 .../listing-16-11/src/main.rs                      |  46 +++++++++
 .../listing-16-12/Cargo.lock                       |   6 ++
 .../listing-16-12/Cargo.toml                       |   6 ++
 .../listing-16-12/src/main.rs                      |  12 +++
 .../listing-16-13/Cargo.lock                       |   6 ++
 .../listing-16-13/Cargo.toml                       |   6 ++
 .../listing-16-13/output.txt                       |  15 +++
 .../listing-16-13/src/main.rs                      |  22 ++++
 .../listing-16-14/Cargo.lock                       |   6 ++
 .../listing-16-14/Cargo.toml                       |   6 ++
 .../listing-16-14/output.txt                       |  21 ++++
 .../listing-16-14/src/main.rs                      |  24 +++++
 .../listing-16-15/Cargo.lock                       |   6 ++
 .../listing-16-15/Cargo.toml                       |   6 ++
 .../listing-16-15/src/main.rs                      |  23 +++++
 .../no-listing-01-join-too-early/Cargo.lock        |   6 ++
 .../no-listing-01-join-too-early/Cargo.toml        |   6 ++
 .../no-listing-01-join-too-early/src/main.rs       |  18 ++++
 .../Cargo.lock                                     |   6 ++
 .../Cargo.toml                                     |   6 ++
 .../src/main.rs                                    |  27 +++++
 .../output-only-01-move-drop/Cargo.lock            |   6 ++
 .../output-only-01-move-drop/Cargo.toml            |   6 ++
 .../output-only-01-move-drop/output.txt            |  18 ++++
 .../output-only-01-move-drop/src/main.rs           |  13 +++
 .../listings/ch17-oop/listing-17-01/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-01/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-01/src/lib.rs     |   4 +
 .../listings/ch17-oop/listing-17-02/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-02/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-02/src/lib.rs     |  33 ++++++
 .../listings/ch17-oop/listing-17-03/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-03/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-03/src/lib.rs     |   3 +
 .../listings/ch17-oop/listing-17-04/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-04/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-04/src/lib.rs     |   9 ++
 .../listings/ch17-oop/listing-17-05/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-05/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-05/src/lib.rs     |  17 ++++
 .../listings/ch17-oop/listing-17-06/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-06/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-06/src/lib.rs     |  20 ++++
 .../listings/ch17-oop/listing-17-07/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-07/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-07/src/lib.rs     |  29 ++++++
 .../listings/ch17-oop/listing-17-08/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-08/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-08/src/lib.rs     |  27 +++++
 .../listings/ch17-oop/listing-17-08/src/main.rs    |  17 ++++
 .../listings/ch17-oop/listing-17-09/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-09/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-09/src/lib.rs     |  27 +++++
 .../listings/ch17-oop/listing-17-09/src/main.rs    |  40 ++++++++
 .../listings/ch17-oop/listing-17-10/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-10/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-10/output.txt     |  13 +++
 .../listings/ch17-oop/listing-17-10/src/lib.rs     |  27 +++++
 .../listings/ch17-oop/listing-17-10/src/main.rs    |   9 ++
 .../listings/ch17-oop/listing-17-11/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-11/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-11/src/main.rs    |  20 ++++
 .../listings/ch17-oop/listing-17-12/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-12/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-12/src/lib.rs     |  19 ++++
 .../listings/ch17-oop/listing-17-12/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-13/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-13/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-13/src/lib.rs     |  28 +++++
 .../listings/ch17-oop/listing-17-13/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-14/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-14/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-14/src/lib.rs     |  32 ++++++
 .../listings/ch17-oop/listing-17-14/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-15/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-15/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-15/src/lib.rs     |  52 ++++++++++
 .../listings/ch17-oop/listing-17-15/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-16/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-16/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-16/src/lib.rs     |  85 ++++++++++++++++
 .../listings/ch17-oop/listing-17-16/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-17/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-17/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-17/src/lib.rs     |  82 +++++++++++++++
 .../listings/ch17-oop/listing-17-17/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-18/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-18/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-18/src/lib.rs     |  94 +++++++++++++++++
 .../listings/ch17-oop/listing-17-18/src/main.rs    |  14 +++
 .../listings/ch17-oop/listing-17-19/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-19/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-19/src/lib.rs     |  25 +++++
 .../listings/ch17-oop/listing-17-20/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-20/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-20/src/lib.rs     |  48 +++++++++
 .../listings/ch17-oop/listing-17-21/Cargo.lock     |   6 ++
 .../listings/ch17-oop/listing-17-21/Cargo.toml     |   6 ++
 .../listings/ch17-oop/listing-17-21/src/lib.rs     |  43 ++++++++
 .../listings/ch17-oop/listing-17-21/src/main.rs    |  13 +++
 .../listing-18-01/Cargo.lock                       |   6 ++
 .../listing-18-01/Cargo.toml                       |   6 ++
 .../listing-18-01/src/main.rs                      |  19 ++++
 .../listing-18-02/Cargo.lock                       |   6 ++
 .../listing-18-02/Cargo.toml                       |   6 ++
 .../listing-18-02/src/main.rs                      |  13 +++
 .../listing-18-03/Cargo.lock                       |   6 ++
 .../listing-18-03/Cargo.toml                       |   6 ++
 .../listing-18-03/output.txt                       |   7 ++
 .../listing-18-03/src/main.rs                      |   9 ++
 .../listing-18-04/Cargo.lock                       |   6 ++
 .../listing-18-04/Cargo.toml                       |   6 ++
 .../listing-18-04/src/main.rs                      |   5 +
 .../listing-18-05/Cargo.lock                       |   6 ++
 .../listing-18-05/Cargo.toml                       |   6 ++
 .../listing-18-05/output.txt                       |  15 +++
 .../listing-18-05/src/main.rs                      |   5 +
 .../listing-18-06/Cargo.lock                       |   6 ++
 .../listing-18-06/Cargo.toml                       |   6 ++
 .../listing-18-06/src/main.rs                      |   7 ++
 .../listing-18-07/Cargo.lock                       |   6 ++
 .../listing-18-07/Cargo.toml                       |   6 ++
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 .../listing-18-08/src/main.rs                      |   6 ++
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 .../listing-18-10/src/main.rs                      |   7 ++
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 .../listing-18-17/Cargo.lock                       |   6 ++
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 .../listing-18-25/rustfmt-ignore                   |   1 +
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 .../no-listing-01-literals/Cargo.lock              |   6 ++
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 .../no-listing-02-multiple-patterns/Cargo.lock     |   6 ++
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 .../listing-19-01/Cargo.lock                       |   6 ++
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 .../listing-19-06/Cargo.lock                       |   6 ++
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 .../listing-19-12/src/lib.rs                       |   5 +
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 .../listing-19-14/src/main.rs                      |  25 +++++
 .../listing-19-15/Cargo.lock                       |   6 ++
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 .../listing-19-16/Cargo.lock                       |   6 ++
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 .../listing-19-17/Cargo.lock                       |   6 ++
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 .../listing-19-18/Cargo.lock                       |   6 ++
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 .../listing-19-18/output.txt                       |   7 ++
 .../listing-19-18/src/main.rs                      |  36 +++++++
 .../listing-19-19/Cargo.lock                       |   6 ++
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 .../listing-19-19/output.txt                       |   5 +
 .../listing-19-19/src/main.rs                      |  21 ++++
 .../listing-19-20/Cargo.lock                       |   6 ++
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 .../listing-19-20/src/main.rs                      |  23 +++++
 .../listing-19-21/Cargo.lock                       |   6 ++
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 .../listing-19-21/output.txt                       |   5 +
 .../listing-19-21/src/main.rs                      |  23 +++++
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 .../hello_macro/hello_macro_derive/Cargo.lock      |  46 +++++++++
 .../hello_macro/hello_macro_derive/Cargo.toml      |  11 ++
 .../hello_macro/hello_macro_derive/src/lib.rs      |  13 +++
 .../listing-19-31/hello_macro/src/lib.rs           |   3 +
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 .../listing-19-33/hello_macro/Cargo.lock           |   6 ++
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 .../hello_macro/hello_macro_derive/Cargo.lock      |  46 +++++++++
 .../hello_macro/hello_macro_derive/Cargo.toml      |  11 ++
 .../hello_macro/hello_macro_derive/src/lib.rs      |  27 +++++
 .../listing-19-33/hello_macro/src/lib.rs           |   3 +
 .../listing-19-33/hello_macro/src/main.rs          |  13 +++
 .../no-listing-01-unsafe-fn/Cargo.lock             |   6 ++
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 .../src/main.rs                                    |  27 +++++
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 .../no-listing-04-kilometers-alias/Cargo.lock      |   6 ++
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 .../no-listing-04-kilometers-alias/src/main.rs     |  12 +++
 .../no-listing-05-write-trait/Cargo.lock           |   6 ++
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 .../no-listing-07-never-type/Cargo.lock            |   6 ++
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 .../no-listing-09-unwrap-definition/src/lib.rs     |  17 ++++
 .../no-listing-10-loop-returns-never/Cargo.lock    |   6 ++
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 .../no-listing-12-generic-fn-definition/Cargo.lock |   6 ++
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 .../no-listing-12-generic-fn-definition/src/lib.rs |   3 +
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 .../no-listing-17-map-initializer/src/main.rs      |  10 ++
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 .../no-listing-18-returns-closure/src/lib.rs       |   3 +
 .../Cargo.lock                                     |   6 ++
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 .../src/lib.rs                                     |   3 +
 .../hello_macro/Cargo.lock                         |   6 ++
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 .../hello_macro/src/lib.rs                         |   3 +
 .../pancakes/Cargo.lock                            |  13 +++
 .../pancakes/Cargo.toml                            |   7 ++
 .../pancakes/src/main.rs                           |  13 +++
 .../no-listing-21-pancakes/hello_macro/Cargo.lock  |   6 ++
 .../no-listing-21-pancakes/hello_macro/Cargo.toml  |   6 ++
 .../hello_macro/hello_macro_derive/Cargo.lock      |  46 +++++++++
 .../hello_macro/hello_macro_derive/Cargo.toml      |  11 ++
 .../hello_macro/hello_macro_derive/src/lib.rs      |  25 +++++
 .../no-listing-21-pancakes/hello_macro/src/lib.rs  |   3 +
 .../no-listing-21-pancakes/hello_macro/src/main.rs |  13 +++
 .../no-listing-21-pancakes/pancakes/Cargo.lock     |  58 +++++++++++
 .../no-listing-21-pancakes/pancakes/Cargo.toml     |   8 ++
 .../no-listing-21-pancakes/pancakes/src/main.rs    |   9 ++
 .../no-listing-22-iterator-on-counter/Cargo.lock   |   6 ++
 .../no-listing-22-iterator-on-counter/Cargo.toml   |   6 ++
 .../no-listing-22-iterator-on-counter/src/lib.rs   |  25 +++++
 .../output-only-01-missing-unsafe/Cargo.lock       |   6 ++
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 .../output-only-01-missing-unsafe/src/main.rs      |   7 ++
 .../ch20-web-server/listing-20-01/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-01/src/main.rs      |  11 ++
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 .../ch20-web-server/listing-20-02/src/main.rs      |  25 +++++
 .../ch20-web-server/listing-20-03/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-03/src/main.rs      |  29 ++++++
 .../ch20-web-server/listing-20-05/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-05/src/main.rs      |  38 +++++++
 .../ch20-web-server/listing-20-06/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-06/src/main.rs      |  37 +++++++
 .../ch20-web-server/listing-20-07/404.html         |  11 ++
 .../ch20-web-server/listing-20-07/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-07/hello.html       |  11 ++
 .../ch20-web-server/listing-20-07/src/main.rs      |  45 ++++++++
 .../ch20-web-server/listing-20-09/404.html         |  11 ++
 .../ch20-web-server/listing-20-09/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-09/hello.html       |  11 ++
 .../ch20-web-server/listing-20-09/src/main.rs      |  40 ++++++++
 .../ch20-web-server/listing-20-10/404.html         |  11 ++
 .../ch20-web-server/listing-20-10/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-10/hello.html       |  11 ++
 .../ch20-web-server/listing-20-10/src/main.rs      |  52 ++++++++++
 .../ch20-web-server/listing-20-11/404.html         |  11 ++
 .../ch20-web-server/listing-20-11/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-11/hello.html       |  11 ++
 .../ch20-web-server/listing-20-11/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-12/404.html         |  11 ++
 .../ch20-web-server/listing-20-12/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-12/hello.html       |  11 ++
 .../ch20-web-server/listing-20-12/output.txt       |  10 ++
 .../ch20-web-server/listing-20-12/src/main.rs      |  44 ++++++++
 .../ch20-web-server/listing-20-13/404.html         |  11 ++
 .../ch20-web-server/listing-20-13/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-13/hello.html       |  11 ++
 .../ch20-web-server/listing-20-13/src/lib.rs       |  27 +++++
 .../ch20-web-server/listing-20-13/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-14/404.html         |  11 ++
 .../ch20-web-server/listing-20-14/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-14/hello.html       |  11 ++
 .../ch20-web-server/listing-20-14/src/lib.rs       |  40 ++++++++
 .../ch20-web-server/listing-20-14/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-15/404.html         |  11 ++
 .../ch20-web-server/listing-20-15/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-15/hello.html       |  11 ++
 .../ch20-web-server/listing-20-15/src/lib.rs       |  53 ++++++++++
 .../ch20-web-server/listing-20-15/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-16/404.html         |  11 ++
 .../ch20-web-server/listing-20-16/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-16/hello.html       |  11 ++
 .../ch20-web-server/listing-20-16/src/lib.rs       |  58 +++++++++++
 .../ch20-web-server/listing-20-16/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-17/404.html         |  11 ++
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 .../ch20-web-server/listing-20-17/output.txt       |  13 +++
 .../ch20-web-server/listing-20-17/src/lib.rs       |  65 ++++++++++++
 .../ch20-web-server/listing-20-17/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-18/404.html         |  11 ++
 .../ch20-web-server/listing-20-18/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-18/hello.html       |  11 ++
 .../ch20-web-server/listing-20-18/src/lib.rs       |  76 ++++++++++++++
 .../ch20-web-server/listing-20-18/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-19/404.html         |  11 ++
 .../ch20-web-server/listing-20-19/Cargo.lock       |   6 ++
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 .../ch20-web-server/listing-20-19/src/lib.rs       |  69 +++++++++++++
 .../ch20-web-server/listing-20-19/src/main.rs      |  43 ++++++++
 .../ch20-web-server/listing-20-20/404.html         |  11 ++
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(limited to 'src/doc/book/listings')

diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.toml
new file mode 100644
index 000000000..78c94fef9
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs
new file mode 100644
index 000000000..d44e290d7
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-01/src/main.rs
@@ -0,0 +1,31 @@
+// ANCHOR: all
+// ANCHOR: io
+use std::io;
+// ANCHOR_END: io
+
+// ANCHOR: main
+fn main() {
+    // ANCHOR_END: main
+    // ANCHOR: print
+    println!("Guess the number!");
+
+    println!("Please input your guess.");
+    // ANCHOR_END: print
+
+    // ANCHOR: string
+    let mut guess = String::new();
+    // ANCHOR_END: string
+
+    // ANCHOR: read
+    io::stdin()
+        .read_line(&mut guess)
+        // ANCHOR_END: read
+        // ANCHOR: expect
+        .expect("Failed to read line");
+    // ANCHOR_END: expect
+
+    // ANCHOR: print_guess
+    println!("You guessed: {guess}");
+    // ANCHOR_END: print_guess
+}
+// ANCHOR: all
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.10"
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+ "getrandom",
+]
+
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+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
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+ "rand_core",
+]
+
+[[package]]
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+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/src/main.rs
new file mode 100644
index 000000000..b35ed0f2f
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-02/src/main.rs
@@ -0,0 +1,15 @@
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    println!("You guessed: {guess}");
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
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+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
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+ "rand_core",
+ "rand_hc",
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+ "rand_core",
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+ "rand_core",
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/src/main.rs
new file mode 100644
index 000000000..1ba2d4d41
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-03/src/main.rs
@@ -0,0 +1,28 @@
+// ANCHOR: all
+use std::io;
+// ANCHOR: ch07-04
+use rand::Rng;
+
+fn main() {
+    // ANCHOR_END: ch07-04
+    println!("Guess the number!");
+
+    // ANCHOR: ch07-04
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+    // ANCHOR_END: ch07-04
+
+    println!("The secret number is: {secret_number}");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    println!("You guessed: {guess}");
+    // ANCHOR: ch07-04
+}
+// ANCHOR_END: ch07-04
+// ANCHOR_END: all
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
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+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
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+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
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+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
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+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
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+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
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+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt
new file mode 100644
index 000000000..62fe8327f
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/output.txt
@@ -0,0 +1,20 @@
+$ cargo build
+   Compiling libc v0.2.86
+   Compiling getrandom v0.2.2
+   Compiling cfg-if v1.0.0
+   Compiling ppv-lite86 v0.2.10
+   Compiling rand_core v0.6.2
+   Compiling rand_chacha v0.3.0
+   Compiling rand v0.8.3
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+error[E0308]: mismatched types
+  --> src/main.rs:22:21
+   |
+22 |     match guess.cmp(&secret_number) {
+   |                     ^^^^^^^^^^^^^^ expected struct `String`, found integer
+   |
+   = note: expected reference `&String`
+              found reference `&{integer}`
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `guessing_game` due to previous error
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/src/main.rs
new file mode 100644
index 000000000..6e58a7645
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-04/src/main.rs
@@ -0,0 +1,32 @@
+// ANCHOR: here
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+    // ANCHOR: here
+
+    println!("You guessed: {guess}");
+
+    match guess.cmp(&secret_number) {
+        Ordering::Less => println!("Too small!"),
+        Ordering::Greater => println!("Too big!"),
+        Ordering::Equal => println!("You win!"),
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
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+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+
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+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
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+ "rand_core",
+]
+
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/src/main.rs
new file mode 100644
index 000000000..12f497e18
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-05/src/main.rs
@@ -0,0 +1,45 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    loop {
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        // ANCHOR: here
+        // --snip--
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        // ANCHOR: ch19
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+        // ANCHOR_END: ch19
+
+        println!("You guessed: {guess}");
+
+        // --snip--
+        // ANCHOR_END: here
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
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+ "rand_hc",
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+ "getrandom",
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+version = "0.3.0"
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+ "rand_core",
+]
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+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/src/main.rs
new file mode 100644
index 000000000..7fcbb99fb
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/listing-02-06/src/main.rs
@@ -0,0 +1,35 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    loop {
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        println!("You guessed: {guess}");
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.lock
new file mode 100644
index 000000000..ee5d79095
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.toml
new file mode 100644
index 000000000..78c94fef9
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt
new file mode 100644
index 000000000..2724c145d
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+    Finished dev [unoptimized + debuginfo] target(s) in 1.50s
+     Running `target/debug/guessing_game`
+Hello, world!
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-01-cargo-new/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.toml
new file mode 100644
index 000000000..78c94fef9
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt
new file mode 100644
index 000000000..8095bbd8d
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/output.txt
@@ -0,0 +1,13 @@
+$ cargo build
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+warning: unused `Result` that must be used
+  --> src/main.rs:10:5
+   |
+10 |     io::stdin().read_line(&mut guess);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(unused_must_use)]` on by default
+   = note: this `Result` may be an `Err` variant, which should be handled
+
+warning: `guessing_game` (bin "guessing_game") generated 1 warning
+    Finished dev [unoptimized + debuginfo] target(s) in 0.59s
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/src/main.rs
new file mode 100644
index 000000000..51046016f
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-02-without-expect/src/main.rs
@@ -0,0 +1,13 @@
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin().read_line(&mut guess);
+
+    println!("You guessed: {guess}");
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
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+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
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+ "rand",
+]
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+ "rand_core",
+ "rand_hc",
+]
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+ "rand_core",
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/src/main.rs
new file mode 100644
index 000000000..7f076c592
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-03-convert-string-to-number/src/main.rs
@@ -0,0 +1,33 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    println!("Please input your guess.");
+
+    // ANCHOR: here
+    // --snip--
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    let guess: u32 = guess.trim().parse().expect("Please type a number!");
+
+    println!("You guessed: {guess}");
+
+    match guess.cmp(&secret_number) {
+        Ordering::Less => println!("Too small!"),
+        Ordering::Greater => println!("Too big!"),
+        Ordering::Equal => println!("You win!"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
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+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
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+ "rand",
+]
+
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+ "rand_core",
+ "rand_hc",
+]
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+ "rand_core",
+]
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diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/src/main.rs
new file mode 100644
index 000000000..f97d1c58c
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-04-looping/src/main.rs
@@ -0,0 +1,40 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    // ANCHOR: here
+    // --snip--
+
+    println!("The secret number is: {secret_number}");
+
+    loop {
+        println!("Please input your guess.");
+
+        // --snip--
+
+        // ANCHOR_END: here
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = guess.trim().parse().expect("Please type a number!");
+
+        println!("You guessed: {guess}");
+
+        // ANCHOR: here
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => println!("You win!"),
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.lock b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
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+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
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+ "rand",
+]
+
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+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.toml b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/src/main.rs b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/src/main.rs
new file mode 100644
index 000000000..def0a0e7e
--- /dev/null
+++ b/src/doc/book/listings/ch02-guessing-game-tutorial/no-listing-05-quitting/src/main.rs
@@ -0,0 +1,38 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    loop {
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = guess.trim().parse().expect("Please type a number!");
+
+        println!("You guessed: {guess}");
+
+        // ANCHOR: here
+        // --snip--
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/src/main.rs
new file mode 100644
index 000000000..b492d384f
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-01/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let y = 6;
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/output.txt
new file mode 100644
index 000000000..3eb8d102a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+     Running `target/debug/branches`
+The value of number is: 5
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/src/main.rs
new file mode 100644
index 000000000..e021e41e8
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-02/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let condition = true;
+    let number = if condition { 5 } else { 6 };
+
+    println!("The value of number is: {number}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/src/main.rs
new file mode 100644
index 000000000..ca070c759
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-03/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    let mut number = 3;
+
+    while number != 0 {
+        println!("{number}!");
+
+        number -= 1;
+    }
+
+    println!("LIFTOFF!!!");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/output.txt
new file mode 100644
index 000000000..35c0f804a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/output.txt
@@ -0,0 +1,9 @@
+$ cargo run
+   Compiling loops v0.1.0 (file:///projects/loops)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.32s
+     Running `target/debug/loops`
+the value is: 10
+the value is: 20
+the value is: 30
+the value is: 40
+the value is: 50
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/src/main.rs
new file mode 100644
index 000000000..38fd301e6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-04/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let a = [10, 20, 30, 40, 50];
+    let mut index = 0;
+
+    while index < 5 {
+        println!("the value is: {}", a[index]);
+
+        index += 1;
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/src/main.rs
new file mode 100644
index 000000000..b44e6b7aa
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/listing-03-05/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let a = [10, 20, 30, 40, 50];
+
+    for element in a {
+        println!("the value is: {element}");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.lock
new file mode 100644
index 000000000..2d62cbe7a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "variables"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.toml
new file mode 100644
index 000000000..4da3b8150
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt
new file mode 100644
index 000000000..ed87cb2c8
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling variables v0.1.0 (file:///projects/variables)
+error[E0384]: cannot assign twice to immutable variable `x`
+ --> src/main.rs:4:5
+  |
+2 |     let x = 5;
+  |         -
+  |         |
+  |         first assignment to `x`
+  |         help: consider making this binding mutable: `mut x`
+3 |     println!("The value of x is: {x}");
+4 |     x = 6;
+  |     ^^^^^ cannot assign twice to immutable variable
+
+For more information about this error, try `rustc --explain E0384`.
+error: could not compile `variables` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/src/main.rs
new file mode 100644
index 000000000..d64f46de4
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-01-variables-are-immutable/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let x = 5;
+    println!("The value of x is: {x}");
+    x = 6;
+    println!("The value of x is: {x}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.lock
new file mode 100644
index 000000000..2d62cbe7a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "variables"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.toml
new file mode 100644
index 000000000..4da3b8150
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt
new file mode 100644
index 000000000..8ed6598ff
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling variables v0.1.0 (file:///projects/variables)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+     Running `target/debug/variables`
+The value of x is: 5
+The value of x is: 6
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/src/main.rs
new file mode 100644
index 000000000..a57709ccf
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-02-adding-mut/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let mut x = 5;
+    println!("The value of x is: {x}");
+    x = 6;
+    println!("The value of x is: {x}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.lock
new file mode 100644
index 000000000..2d62cbe7a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "variables"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.toml
new file mode 100644
index 000000000..4da3b8150
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt
new file mode 100644
index 000000000..f310e9ffa
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling variables v0.1.0 (file:///projects/variables)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+     Running `target/debug/variables`
+The value of x in the inner scope is: 12
+The value of x is: 6
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/src/main.rs
new file mode 100644
index 000000000..03924fe1c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-03-shadowing/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    let x = 5;
+
+    let x = x + 1;
+
+    {
+        let x = x * 2;
+        println!("The value of x in the inner scope is: {x}");
+    }
+
+    println!("The value of x is: {x}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.lock
new file mode 100644
index 000000000..2d62cbe7a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "variables"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.toml
new file mode 100644
index 000000000..4da3b8150
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/src/main.rs
new file mode 100644
index 000000000..42589f548
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-04-shadowing-can-change-types/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let spaces = "   ";
+    let spaces = spaces.len();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.lock
new file mode 100644
index 000000000..2d62cbe7a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "variables"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.toml
new file mode 100644
index 000000000..4da3b8150
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt
new file mode 100644
index 000000000..31a07efc4
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling variables v0.1.0 (file:///projects/variables)
+error[E0308]: mismatched types
+ --> src/main.rs:3:14
+  |
+2 |     let mut spaces = "   ";
+  |                      ----- expected due to this value
+3 |     spaces = spaces.len();
+  |              ^^^^^^^^^^^^ expected `&str`, found `usize`
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `variables` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/src/main.rs
new file mode 100644
index 000000000..f52635d0b
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-05-mut-cant-change-types/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let mut spaces = "   ";
+    spaces = spaces.len();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.lock
new file mode 100644
index 000000000..3b40559a7
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "floating-point"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.toml
new file mode 100644
index 000000000..83610e756
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "floating-point"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/src/main.rs
new file mode 100644
index 000000000..6f4f0fe87
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-06-floating-point/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let x = 2.0; // f64
+
+    let y: f32 = 3.0; // f32
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.lock
new file mode 100644
index 000000000..94a12b255
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "numeric-operations"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.toml
new file mode 100644
index 000000000..b4bea55e3
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "numeric-operations"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs
new file mode 100644
index 000000000..9d3b4813b
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs
@@ -0,0 +1,17 @@
+fn main() {
+    // addition
+    let sum = 5 + 10;
+
+    // subtraction
+    let difference = 95.5 - 4.3;
+
+    // multiplication
+    let product = 4 * 30;
+
+    // division
+    let quotient = 56.7 / 32.2;
+    let floored = 2 / 3; // Results in 0
+
+    // remainder
+    let remainder = 43 % 5;
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.lock
new file mode 100644
index 000000000..5d5728ebd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "boolean"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.toml
new file mode 100644
index 000000000..47e42cef8
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "boolean"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/src/main.rs
new file mode 100644
index 000000000..2c56e62f9
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-08-boolean/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let t = true;
+
+    let f: bool = false; // with explicit type annotation
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.lock
new file mode 100644
index 000000000..bb58446cc
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "char"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.toml
new file mode 100644
index 000000000..a1ef3b537
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "char"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/src/main.rs
new file mode 100644
index 000000000..4921cc998
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-09-char/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let c = 'z';
+    let z: char = 'ℤ'; // with explicit type annotation
+    let heart_eyed_cat = '😻';
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.lock
new file mode 100644
index 000000000..f57f0767c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tuples"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.toml
new file mode 100644
index 000000000..9b0879c2c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tuples"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/src/main.rs
new file mode 100644
index 000000000..b7b51fb2f
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-10-tuples/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let tup: (i32, f64, u8) = (500, 6.4, 1);
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.lock
new file mode 100644
index 000000000..f57f0767c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tuples"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.toml
new file mode 100644
index 000000000..9b0879c2c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tuples"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/src/main.rs
new file mode 100644
index 000000000..3002bdde4
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-11-destructuring-tuples/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let tup = (500, 6.4, 1);
+
+    let (x, y, z) = tup;
+
+    println!("The value of y is: {y}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.lock
new file mode 100644
index 000000000..f57f0767c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tuples"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.toml
new file mode 100644
index 000000000..9b0879c2c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tuples"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/src/main.rs
new file mode 100644
index 000000000..1b1e646fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-12-tuple-indexing/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let x: (i32, f64, u8) = (500, 6.4, 1);
+
+    let five_hundred = x.0;
+
+    let six_point_four = x.1;
+
+    let one = x.2;
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.lock
new file mode 100644
index 000000000..68e3c5967
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "arrays"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.toml
new file mode 100644
index 000000000..96be3e2b1
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "arrays"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/src/main.rs
new file mode 100644
index 000000000..d475901ce
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-13-arrays/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let a = [1, 2, 3, 4, 5];
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.lock
new file mode 100644
index 000000000..68e3c5967
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "arrays"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.toml
new file mode 100644
index 000000000..96be3e2b1
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "arrays"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/src/main.rs
new file mode 100644
index 000000000..d33e3174f
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-14-array-indexing/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let a = [1, 2, 3, 4, 5];
+
+    let first = a[0];
+    let second = a[1];
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock
new file mode 100644
index 000000000..68e3c5967
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "arrays"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml
new file mode 100644
index 000000000..96be3e2b1
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "arrays"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs
new file mode 100644
index 000000000..b634c9378
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs
@@ -0,0 +1,22 @@
+use std::io;
+
+fn main() {
+    let a = [1, 2, 3, 4, 5];
+
+    println!("Please enter an array index.");
+
+    let mut index = String::new();
+
+    io::stdin()
+        .read_line(&mut index)
+        .expect("Failed to read line");
+
+    let index: usize = index
+        .trim()
+        .parse()
+        .expect("Index entered was not a number");
+
+    let element = a[index];
+
+    println!("The value of the element at index {index} is: {element}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt
new file mode 100644
index 000000000..723fad32a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.28s
+     Running `target/debug/functions`
+Hello, world!
+Another function.
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/src/main.rs
new file mode 100644
index 000000000..38be8565b
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-16-functions/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    println!("Hello, world!");
+
+    another_function();
+}
+
+fn another_function() {
+    println!("Another function.");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt
new file mode 100644
index 000000000..546bbc047
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+    Finished dev [unoptimized + debuginfo] target(s) in 1.21s
+     Running `target/debug/functions`
+The value of x is: 5
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs
new file mode 100644
index 000000000..108da4f81
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-17-functions-with-parameters/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    another_function(5);
+}
+
+fn another_function(x: i32) {
+    println!("The value of x is: {x}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt
new file mode 100644
index 000000000..6210234c9
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+     Running `target/debug/functions`
+The measurement is: 5h
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/src/main.rs
new file mode 100644
index 000000000..b070ccb23
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-18-functions-with-multiple-parameters/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    print_labeled_measurement(5, 'h');
+}
+
+fn print_labeled_measurement(value: i32, unit_label: char) {
+    println!("The measurement is: {value}{unit_label}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.lock
new file mode 100644
index 000000000..89a654d69
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt
new file mode 100644
index 000000000..a5a85f4f6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt
@@ -0,0 +1,34 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+error: expected expression, found statement (`let`)
+ --> src/main.rs:2:14
+  |
+2 |     let x = (let y = 6);
+  |              ^^^^^^^^^
+  |
+  = note: variable declaration using `let` is a statement
+
+error[E0658]: `let` expressions in this position are unstable
+ --> src/main.rs:2:14
+  |
+2 |     let x = (let y = 6);
+  |              ^^^^^^^^^
+  |
+  = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
+
+warning: unnecessary parentheses around assigned value
+ --> src/main.rs:2:13
+  |
+2 |     let x = (let y = 6);
+  |             ^         ^
+  |
+  = note: `#[warn(unused_parens)]` on by default
+help: remove these parentheses
+  |
+2 -     let x = (let y = 6);
+2 +     let x = let y = 6;
+  | 
+
+For more information about this error, try `rustc --explain E0658`.
+warning: `functions` (bin "functions") generated 1 warning
+error: could not compile `functions` due to 2 previous errors; 1 warning emitted
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/rustfmt-ignore b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/rustfmt-ignore
new file mode 100644
index 000000000..06a976dd4
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/rustfmt-ignore
@@ -0,0 +1 @@
+This listing deliberately doesn't parse so rustfmt fails.
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/src/main.rs
new file mode 100644
index 000000000..988f9653e
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let x = (let y = 6);
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/src/main.rs
new file mode 100644
index 000000000..64b873297
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-20-blocks-are-expressions/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    let y = {
+        let x = 3;
+        x + 1
+    };
+
+    println!("The value of y is: {y}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt
new file mode 100644
index 000000000..a457e3399
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
+     Running `target/debug/functions`
+The value of x is: 5
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/src/main.rs
new file mode 100644
index 000000000..a11af7ec7
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-21-function-return-values/src/main.rs
@@ -0,0 +1,9 @@
+fn five() -> i32 {
+    5
+}
+
+fn main() {
+    let x = five();
+
+    println!("The value of x is: {x}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/src/main.rs
new file mode 100644
index 000000000..da9d0ddb3
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-22-function-parameter-and-return/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let x = plus_one(5);
+
+    println!("The value of x is: {x}");
+}
+
+fn plus_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.lock
new file mode 100644
index 000000000..88287d136
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.toml
new file mode 100644
index 000000000..478b346fd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt
new file mode 100644
index 000000000..c0484ea1b
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/output.txt
@@ -0,0 +1,14 @@
+$ cargo run
+   Compiling functions v0.1.0 (file:///projects/functions)
+error[E0308]: mismatched types
+ --> src/main.rs:7:24
+  |
+7 | fn plus_one(x: i32) -> i32 {
+  |    --------            ^^^ expected `i32`, found `()`
+  |    |
+  |    implicitly returns `()` as its body has no tail or `return` expression
+8 |     x + 1;
+  |          - help: remove this semicolon
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `functions` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/src/main.rs
new file mode 100644
index 000000000..1cec800b6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-23-statements-dont-return-values/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let x = plus_one(5);
+
+    println!("The value of x is: {x}");
+}
+
+fn plus_one(x: i32) -> i32 {
+    x + 1;
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.lock
new file mode 100644
index 000000000..a289136a6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "comments"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.toml
new file mode 100644
index 000000000..e0576b5dc
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "comments"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/src/main.rs
new file mode 100644
index 000000000..535f4b993
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-24-comments-end-of-line/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let lucky_number = 7; // I’m feeling lucky today
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.lock
new file mode 100644
index 000000000..a289136a6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "comments"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.toml
new file mode 100644
index 000000000..e0576b5dc
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "comments"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/src/main.rs
new file mode 100644
index 000000000..81cd93559
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-25-comments-above-line/src/main.rs
@@ -0,0 +1,4 @@
+fn main() {
+    // I’m feeling lucky today
+    let lucky_number = 7;
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt
new file mode 100644
index 000000000..3d8c7dc33
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+     Running `target/debug/branches`
+condition was true
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/src/main.rs
new file mode 100644
index 000000000..e64a42adf
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-26-if-true/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let number = 3;
+
+    if number < 5 {
+        println!("condition was true");
+    } else {
+        println!("condition was false");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt
new file mode 100644
index 000000000..e40da961c
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+     Running `target/debug/branches`
+condition was false
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/src/main.rs
new file mode 100644
index 000000000..f7d76cf55
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-27-if-false/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let number = 7;
+    // ANCHOR_END: here
+
+    if number < 5 {
+        println!("condition was true");
+    } else {
+        println!("condition was false");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt
new file mode 100644
index 000000000..735bfe758
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/output.txt
@@ -0,0 +1,10 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+error[E0308]: mismatched types
+ --> src/main.rs:4:8
+  |
+4 |     if number {
+  |        ^^^^^^ expected `bool`, found integer
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `branches` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/src/main.rs
new file mode 100644
index 000000000..bc4af767b
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-28-if-condition-must-be-bool/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let number = 3;
+
+    if number {
+        println!("number was three");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/src/main.rs
new file mode 100644
index 000000000..704650f46
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-29-if-not-equal-0/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let number = 3;
+
+    if number != 0 {
+        println!("number was something other than zero");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt
new file mode 100644
index 000000000..b218941ad
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.31s
+     Running `target/debug/branches`
+number is divisible by 3
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/src/main.rs
new file mode 100644
index 000000000..d0ef9b2c1
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-30-else-if/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let number = 6;
+
+    if number % 4 == 0 {
+        println!("number is divisible by 4");
+    } else if number % 3 == 0 {
+        println!("number is divisible by 3");
+    } else if number % 2 == 0 {
+        println!("number is divisible by 2");
+    } else {
+        println!("number is not divisible by 4, 3, or 2");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.lock
new file mode 100644
index 000000000..4ca0c2dbd
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "branches"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.toml
new file mode 100644
index 000000000..659645556
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt
new file mode 100644
index 000000000..e922acd29
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling branches v0.1.0 (file:///projects/branches)
+error[E0308]: `if` and `else` have incompatible types
+ --> src/main.rs:4:44
+  |
+4 |     let number = if condition { 5 } else { "six" };
+  |                                 -          ^^^^^ expected integer, found `&str`
+  |                                 |
+  |                                 expected because of this
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `branches` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/src/main.rs
new file mode 100644
index 000000000..df7068bcf
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-31-arms-must-return-same-type/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let condition = true;
+
+    let number = if condition { 5 } else { "six" };
+
+    println!("The value of number is: {number}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.lock
new file mode 100644
index 000000000..f73867315
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt
new file mode 100644
index 000000000..d4d322fb4
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/output.txt
@@ -0,0 +1,13 @@
+$ cargo run
+   Compiling loops v0.1.0 (file:///projects/loops)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.58s
+     Running `target/debug/loops`
+count = 0
+remaining = 10
+remaining = 9
+count = 1
+remaining = 10
+remaining = 9
+count = 2
+remaining = 10
+End count = 2
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/src/main.rs
new file mode 100644
index 000000000..dd8856403
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-5-loop-labels/src/main.rs
@@ -0,0 +1,21 @@
+fn main() {
+    let mut count = 0;
+    'counting_up: loop {
+        println!("count = {count}");
+        let mut remaining = 10;
+
+        loop {
+            println!("remaining = {remaining}");
+            if remaining == 9 {
+                break;
+            }
+            if count == 2 {
+                break 'counting_up;
+            }
+            remaining -= 1;
+        }
+
+        count += 1;
+    }
+    println!("End count = {count}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs
new file mode 100644
index 000000000..f1692e462
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-32-loop/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    loop {
+        println!("again!");
+    }
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/src/main.rs
new file mode 100644
index 000000000..683d18bc1
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-33-return-value-from-loop/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let mut counter = 0;
+
+    let result = loop {
+        counter += 1;
+
+        if counter == 10 {
+            break counter * 2;
+        }
+    };
+
+    println!("The result is {result}");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.lock
new file mode 100644
index 000000000..9942b362a
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "loops"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.toml
new file mode 100644
index 000000000..810e8bbc0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/src/main.rs
new file mode 100644
index 000000000..df5b305bc
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-34-for-range/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    for number in (1..4).rev() {
+        println!("{number}!");
+    }
+    println!("LIFTOFF!!!");
+}
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.lock
new file mode 100644
index 000000000..b5664bc33
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "no_type_annotations"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.toml
new file mode 100644
index 000000000..8ad4d5aa6
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "no_type_annotations"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt
new file mode 100644
index 000000000..d9807cee0
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/output.txt
@@ -0,0 +1,10 @@
+$ cargo build
+   Compiling no_type_annotations v0.1.0 (file:///projects/no_type_annotations)
+error[E0282]: type annotations needed
+ --> src/main.rs:2:9
+  |
+2 |     let guess = "42".parse().expect("Not a number!");
+  |         ^^^^^ consider giving `guess` a type
+
+For more information about this error, try `rustc --explain E0282`.
+error: could not compile `no_type_annotations` due to previous error
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/src/main.rs
new file mode 100644
index 000000000..f41c55805
--- /dev/null
+++ b/src/doc/book/listings/ch03-common-programming-concepts/output-only-01-no-type-annotations/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let guess = "42".parse().expect("Not a number!");
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/src/main.rs
new file mode 100644
index 000000000..148ad84c9
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-01/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    {                      // s is not valid here, it’s not yet declared
+        let s = "hello";   // s is valid from this point forward
+
+        // do stuff with s
+    }                      // this scope is now over, and s is no longer valid
+    // ANCHOR_END: here
+}
\ No newline at end of file
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/src/main.rs
new file mode 100644
index 000000000..de0f1b325
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-02/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let x = 5;
+    let y = x;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/src/main.rs
new file mode 100644
index 000000000..b001cc5f4
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-03/src/main.rs
@@ -0,0 +1,23 @@
+fn main() {
+    let s = String::from("hello");  // s comes into scope
+
+    takes_ownership(s);             // s's value moves into the function...
+                                    // ... and so is no longer valid here
+
+    let x = 5;                      // x comes into scope
+
+    makes_copy(x);                  // x would move into the function,
+                                    // but i32 is Copy, so it's okay to still
+                                    // use x afterward
+
+} // Here, x goes out of scope, then s. But because s's value was moved, nothing
+  // special happens.
+
+fn takes_ownership(some_string: String) { // some_string comes into scope
+    println!("{}", some_string);
+} // Here, some_string goes out of scope and `drop` is called. The backing
+  // memory is freed.
+
+fn makes_copy(some_integer: i32) { // some_integer comes into scope
+    println!("{}", some_integer);
+} // Here, some_integer goes out of scope. Nothing special happens.
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/src/main.rs
new file mode 100644
index 000000000..e206bec7a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-04/src/main.rs
@@ -0,0 +1,29 @@
+fn main() {
+    let s1 = gives_ownership();         // gives_ownership moves its return
+                                        // value into s1
+
+    let s2 = String::from("hello");     // s2 comes into scope
+
+    let s3 = takes_and_gives_back(s2);  // s2 is moved into
+                                        // takes_and_gives_back, which also
+                                        // moves its return value into s3
+} // Here, s3 goes out of scope and is dropped. s2 was moved, so nothing
+  // happens. s1 goes out of scope and is dropped.
+
+fn gives_ownership() -> String {             // gives_ownership will move its
+                                             // return value into the function
+                                             // that calls it
+
+    let some_string = String::from("yours"); // some_string comes into scope
+
+    some_string                              // some_string is returned and
+                                             // moves out to the calling
+                                             // function
+}
+
+// This function takes a String and returns one
+fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
+                                                      // scope
+
+    a_string  // a_string is returned and moves out to the calling function
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/src/main.rs
new file mode 100644
index 000000000..22aee1419
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-05/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let s1 = String::from("hello");
+
+    let (s2, len) = calculate_length(s1);
+
+    println!("The length of '{}' is {}.", s2, len);
+}
+
+fn calculate_length(s: String) -> (String, usize) {
+    let length = s.len(); // len() returns the length of a String
+
+    (s, length)
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/output.txt b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/output.txt
new file mode 100644
index 000000000..1176f4e3a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0596]: cannot borrow `*some_string` as mutable, as it is behind a `&` reference
+ --> src/main.rs:8:5
+  |
+7 | fn change(some_string: &String) {
+  |                        ------- help: consider changing this to be a mutable reference: `&mut String`
+8 |     some_string.push_str(", world");
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+
+For more information about this error, try `rustc --explain E0596`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/src/main.rs
new file mode 100644
index 000000000..330ffa68a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-06/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let s = String::from("hello");
+
+    change(&s);
+}
+
+fn change(some_string: &String) {
+    some_string.push_str(", world");
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/src/main.rs
new file mode 100644
index 000000000..3bb3c8580
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-07/src/main.rs
@@ -0,0 +1,21 @@
+// ANCHOR: here
+fn first_word(s: &String) -> usize {
+    // ANCHOR: as_bytes
+    let bytes = s.as_bytes();
+    // ANCHOR_END: as_bytes
+
+    // ANCHOR: iter
+    for (i, &item) in bytes.iter().enumerate() {
+        // ANCHOR_END: iter
+        // ANCHOR: inside_for
+        if item == b' ' {
+            return i;
+        }
+    }
+
+    s.len()
+    // ANCHOR_END: inside_for
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/src/main.rs
new file mode 100644
index 000000000..b6182fe2b
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-08/src/main.rs
@@ -0,0 +1,24 @@
+fn first_word(s: &String) -> usize {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return i;
+        }
+    }
+
+    s.len()
+}
+
+// ANCHOR: here
+fn main() {
+    let mut s = String::from("hello world");
+
+    let word = first_word(&s); // word will get the value 5
+
+    s.clear(); // this empties the String, making it equal to ""
+
+    // word still has the value 5 here, but there's no more string that
+    // we could meaningfully use the value 5 with. word is now totally invalid!
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/src/main.rs
new file mode 100644
index 000000000..5a6ceaa1e
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/listing-04-09/src/main.rs
@@ -0,0 +1,36 @@
+// ANCHOR: here
+fn first_word(s: &str) -> &str {
+    // ANCHOR_END: here
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &s[0..i];
+        }
+    }
+
+    &s[..]
+}
+
+// ANCHOR: usage
+fn main() {
+    let my_string = String::from("hello world");
+
+    // `first_word` works on slices of `String`s, whether partial or whole
+    let word = first_word(&my_string[0..6]);
+    let word = first_word(&my_string[..]);
+    // `first_word` also works on references to `String`s, which are equivalent
+    // to whole slices of `String`s
+    let word = first_word(&my_string);
+
+    let my_string_literal = "hello world";
+
+    // `first_word` works on slices of string literals, whether partial or whole
+    let word = first_word(&my_string_literal[0..6]);
+    let word = first_word(&my_string_literal[..]);
+
+    // Because string literals *are* string slices already,
+    // this works too, without the slice syntax!
+    let word = first_word(my_string_literal);
+}
+// ANCHOR_END: usage
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/src/main.rs
new file mode 100644
index 000000000..b68f0f1e7
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-01-can-mutate-string/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("hello");
+
+    s.push_str(", world!"); // push_str() appends a literal to a String
+
+    println!("{}", s); // This will print `hello, world!`
+                       // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/src/main.rs
new file mode 100644
index 000000000..7e6d46f83
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-02-string-scope/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    {
+        let s = String::from("hello"); // s is valid from this point forward
+
+        // do stuff with s
+    }                                  // this scope is now over, and s is no
+                                       // longer valid
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/src/main.rs
new file mode 100644
index 000000000..a5817e714
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-03-string-move/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("hello");
+    let s2 = s1;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt
new file mode 100644
index 000000000..6435eeb44
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/output.txt
@@ -0,0 +1,17 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0382]: borrow of moved value: `s1`
+ --> src/main.rs:5:28
+  |
+2 |     let s1 = String::from("hello");
+  |         -- move occurs because `s1` has type `String`, which does not implement the `Copy` trait
+3 |     let s2 = s1;
+  |              -- value moved here
+4 | 
+5 |     println!("{}, world!", s1);
+  |                            ^^ value borrowed here after move
+  |
+  = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs
new file mode 100644
index 000000000..d0b9f1879
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-04-cant-use-after-move/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("hello");
+    let s2 = s1;
+
+    println!("{}, world!", s1);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs
new file mode 100644
index 000000000..4e61cc1a1
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-05-clone/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("hello");
+    let s2 = s1.clone();
+
+    println!("s1 = {}, s2 = {}", s1, s2);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs
new file mode 100644
index 000000000..63a1fae24
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-06-copy/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let x = 5;
+    let y = x;
+
+    println!("x = {}, y = {}", x, y);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs
new file mode 100644
index 000000000..fd32a5fc9
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-07-reference/src/main.rs
@@ -0,0 +1,15 @@
+// ANCHOR: all
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("hello");
+
+    let len = calculate_length(&s1);
+    // ANCHOR_END: here
+
+    println!("The length of '{}' is {}.", s1, len);
+}
+
+fn calculate_length(s: &String) -> usize {
+    s.len()
+}
+// ANCHOR_END: all
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/src/main.rs
new file mode 100644
index 000000000..6686a801c
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    let s1 = String::from("hello");
+
+    let len = calculate_length(&s1);
+
+    println!("The length of '{}' is {}.", s1, len);
+}
+
+// ANCHOR: here
+fn calculate_length(s: &String) -> usize { // s is a reference to a String
+    s.len()
+} // Here, s goes out of scope. But because it does not have ownership of what
+  // it refers to, it is not dropped.
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/src/main.rs
new file mode 100644
index 000000000..fdf7f0a6f
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-09-fixes-listing-04-06/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let mut s = String::from("hello");
+
+    change(&mut s);
+}
+
+fn change(some_string: &mut String) {
+    some_string.push_str(", world");
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt
new file mode 100644
index 000000000..71c29f68f
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/output.txt
@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0499]: cannot borrow `s` as mutable more than once at a time
+ --> src/main.rs:5:14
+  |
+4 |     let r1 = &mut s;
+  |              ------ first mutable borrow occurs here
+5 |     let r2 = &mut s;
+  |              ^^^^^^ second mutable borrow occurs here
+6 | 
+7 |     println!("{}, {}", r1, r2);
+  |                        -- first borrow later used here
+
+For more information about this error, try `rustc --explain E0499`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/src/main.rs
new file mode 100644
index 000000000..ddbf8120f
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-10-multiple-mut-not-allowed/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("hello");
+
+    let r1 = &mut s;
+    let r2 = &mut s;
+
+    println!("{}, {}", r1, r2);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/src/main.rs
new file mode 100644
index 000000000..4b1a5a383
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-11-muts-in-separate-scopes/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("hello");
+
+    {
+        let r1 = &mut s;
+    } // r1 goes out of scope here, so we can make a new reference with no problems.
+
+    let r2 = &mut s;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt
new file mode 100644
index 000000000..df94c30e9
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
+ --> src/main.rs:6:14
+  |
+4 |     let r1 = &s; // no problem
+  |              -- immutable borrow occurs here
+5 |     let r2 = &s; // no problem
+6 |     let r3 = &mut s; // BIG PROBLEM
+  |              ^^^^^^ mutable borrow occurs here
+7 | 
+8 |     println!("{}, {}, and {}", r1, r2, r3);
+  |                                -- immutable borrow later used here
+
+For more information about this error, try `rustc --explain E0502`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/src/main.rs
new file mode 100644
index 000000000..0da04c010
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-12-immutable-and-mutable-not-allowed/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("hello");
+
+    let r1 = &s; // no problem
+    let r2 = &s; // no problem
+    let r3 = &mut s; // BIG PROBLEM
+
+    println!("{}, {}, and {}", r1, r2, r3);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/src/main.rs
new file mode 100644
index 000000000..861944966
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-13-reference-scope-ends/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("hello");
+
+    let r1 = &s; // no problem
+    let r2 = &s; // no problem
+    println!("{} and {}", r1, r2);
+    // variables r1 and r2 will not be used after this point
+
+    let r3 = &mut s; // no problem
+    println!("{}", r3);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt
new file mode 100644
index 000000000..fddca683b
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0106]: missing lifetime specifier
+ --> src/main.rs:5:16
+  |
+5 | fn dangle() -> &String {
+  |                ^ expected named lifetime parameter
+  |
+  = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
+help: consider using the `'static` lifetime
+  |
+5 | fn dangle() -> &'static String {
+  |                ~~~~~~~~
+
+For more information about this error, try `rustc --explain E0106`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/src/main.rs
new file mode 100644
index 000000000..b10269781
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-14-dangling-reference/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let reference_to_nothing = dangle();
+}
+
+fn dangle() -> &String {
+    let s = String::from("hello");
+
+    &s
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.lock
new file mode 100644
index 000000000..9e4e62ddf
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/rustfmt-ignore b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/src/main.rs
new file mode 100644
index 000000000..9fbb372a0
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-15-dangling-reference-annotated/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let reference_to_nothing = dangle();
+}
+
+// ANCHOR: here
+fn dangle() -> &String { // dangle returns a reference to a String
+
+    let s = String::from("hello"); // s is a new String
+
+    &s // we return a reference to the String, s
+} // Here, s goes out of scope, and is dropped. Its memory goes away.
+  // Danger!
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/src/main.rs
new file mode 100644
index 000000000..9c20a3b2d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-16-no-dangle/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    let string = no_dangle();
+}
+
+// ANCHOR: here
+fn no_dangle() -> String {
+    let s = String::from("hello");
+
+    s
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/src/main.rs
new file mode 100644
index 000000000..44163af99
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-17-slice/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let s = String::from("hello world");
+
+    let hello = &s[0..5];
+    let world = &s[6..11];
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/src/main.rs
new file mode 100644
index 000000000..f44a970da
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-18-first-word-slice/src/main.rs
@@ -0,0 +1,15 @@
+// ANCHOR: here
+fn first_word(s: &String) -> &str {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &s[0..i];
+        }
+    }
+
+    &s[..]
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.lock b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.toml b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt
new file mode 100644
index 000000000..62dc4ad52
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling ownership v0.1.0 (file:///projects/ownership)
+error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
+  --> src/main.rs:18:5
+   |
+16 |     let word = first_word(&s);
+   |                           -- immutable borrow occurs here
+17 | 
+18 |     s.clear(); // error!
+   |     ^^^^^^^^^ mutable borrow occurs here
+19 | 
+20 |     println!("the first word is: {}", word);
+   |                                       ---- immutable borrow later used here
+
+For more information about this error, try `rustc --explain E0502`.
+error: could not compile `ownership` due to previous error
diff --git a/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/src/main.rs b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/src/main.rs
new file mode 100644
index 000000000..99e04018d
--- /dev/null
+++ b/src/doc/book/listings/ch04-understanding-ownership/no-listing-19-slice-error/src/main.rs
@@ -0,0 +1,23 @@
+fn first_word(s: &String) -> &str {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &s[0..i];
+        }
+    }
+
+    &s[..]
+}
+
+// ANCHOR: here
+fn main() {
+    let mut s = String::from("hello world");
+
+    let word = first_word(&s);
+
+    s.clear(); // error!
+
+    println!("the first word is: {}", word);
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/src/main.rs
new file mode 100644
index 000000000..16dd15b29
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-01/src/main.rs
@@ -0,0 +1,10 @@
+// ANCHOR: here
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/src/main.rs
new file mode 100644
index 000000000..e0f7a6cd3
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-02/src/main.rs
@@ -0,0 +1,17 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn main() {
+    let user1 = User {
+        email: String::from("someone@example.com"),
+        username: String::from("someusername123"),
+        active: true,
+        sign_in_count: 1,
+    };
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/src/main.rs
new file mode 100644
index 000000000..7a078e7e8
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-03/src/main.rs
@@ -0,0 +1,19 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn main() {
+    let mut user1 = User {
+        email: String::from("someone@example.com"),
+        username: String::from("someusername123"),
+        active: true,
+        sign_in_count: 1,
+    };
+
+    user1.email = String::from("anotheremail@example.com");
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/src/main.rs
new file mode 100644
index 000000000..aa7823af4
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-04/src/main.rs
@@ -0,0 +1,24 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn build_user(email: String, username: String) -> User {
+    User {
+        email: email,
+        username: username,
+        active: true,
+        sign_in_count: 1,
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let user1 = build_user(
+        String::from("someone@example.com"),
+        String::from("someusername123"),
+    );
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/src/main.rs
new file mode 100644
index 000000000..8d84a3060
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-05/src/main.rs
@@ -0,0 +1,24 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn build_user(email: String, username: String) -> User {
+    User {
+        email,
+        username,
+        active: true,
+        sign_in_count: 1,
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let user1 = build_user(
+        String::from("someone@example.com"),
+        String::from("someusername123"),
+    );
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/src/main.rs
new file mode 100644
index 000000000..15e7690e1
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-06/src/main.rs
@@ -0,0 +1,28 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+
+    let user1 = User {
+        email: String::from("someone@example.com"),
+        username: String::from("someusername123"),
+        active: true,
+        sign_in_count: 1,
+    };
+    // ANCHOR: here
+
+    let user2 = User {
+        active: user1.active,
+        username: user1.username,
+        email: String::from("another@example.com"),
+        sign_in_count: user1.sign_in_count,
+    };
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/src/main.rs
new file mode 100644
index 000000000..008ad18f6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-07/src/main.rs
@@ -0,0 +1,26 @@
+struct User {
+    active: bool,
+    username: String,
+    email: String,
+    sign_in_count: u64,
+}
+
+// ANCHOR: here
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+
+    let user1 = User {
+        email: String::from("someone@example.com"),
+        username: String::from("someusername123"),
+        active: true,
+        sign_in_count: 1,
+    };
+    // ANCHOR: here
+
+    let user2 = User {
+        email: String::from("another@example.com"),
+        ..user1
+    };
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt
new file mode 100644
index 000000000..c44b58238
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.42s
+     Running `target/debug/rectangles`
+The area of the rectangle is 1500 square pixels.
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/src/main.rs
new file mode 100644
index 000000000..f324529fd
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-08/src/main.rs
@@ -0,0 +1,17 @@
+// ANCHOR: all
+fn main() {
+    let width1 = 30;
+    let height1 = 50;
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        area(width1, height1)
+    );
+}
+
+// ANCHOR: here
+fn area(width: u32, height: u32) -> u32 {
+    // ANCHOR_END: here
+    width * height
+}
+// ANCHOR_END: all
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/src/main.rs
new file mode 100644
index 000000000..d4b77ba7a
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-09/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    let rect1 = (30, 50);
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        area(rect1)
+    );
+}
+
+fn area(dimensions: (u32, u32)) -> u32 {
+    dimensions.0 * dimensions.1
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/src/main.rs
new file mode 100644
index 000000000..62ef9acd8
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-10/src/main.rs
@@ -0,0 +1,20 @@
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        area(&rect1)
+    );
+}
+
+fn area(rectangle: &Rectangle) -> u32 {
+    rectangle.width * rectangle.height
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt
new file mode 100644
index 000000000..b761fccd6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/output.txt
@@ -0,0 +1,14 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+error[E0277]: `Rectangle` doesn't implement `std::fmt::Display`
+  --> src/main.rs:12:29
+   |
+12 |     println!("rect1 is {}", rect1);
+   |                             ^^^^^ `Rectangle` cannot be formatted with the default formatter
+   |
+   = help: the trait `std::fmt::Display` is not implemented for `Rectangle`
+   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
+   = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `rectangles` due to previous error
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/src/main.rs
new file mode 100644
index 000000000..0ff8dcc8c
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-11/src/main.rs
@@ -0,0 +1,13 @@
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!("rect1 is {}", rect1);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt
new file mode 100644
index 000000000..c37be6b5b
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+     Running `target/debug/rectangles`
+rect1 is Rectangle { width: 30, height: 50 }
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs
new file mode 100644
index 000000000..2ffc4b8e7
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-12/src/main.rs
@@ -0,0 +1,14 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!("rect1 is {:?}", rect1);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/src/main.rs
new file mode 100644
index 000000000..e4f45e868
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-13/src/main.rs
@@ -0,0 +1,23 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn area(&self) -> u32 {
+        self.width * self.height
+    }
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        rect1.area()
+    );
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/src/main.rs
new file mode 100644
index 000000000..843dab481
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-14/src/main.rs
@@ -0,0 +1,17 @@
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+    let rect2 = Rectangle {
+        width: 10,
+        height: 40,
+    };
+    let rect3 = Rectangle {
+        width: 60,
+        height: 45,
+    };
+
+    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
+    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/src/main.rs
new file mode 100644
index 000000000..e6a32723f
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-15/src/main.rs
@@ -0,0 +1,35 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+// ANCHOR: here
+impl Rectangle {
+    fn area(&self) -> u32 {
+        self.width * self.height
+    }
+
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+    let rect2 = Rectangle {
+        width: 10,
+        height: 40,
+    };
+    let rect3 = Rectangle {
+        width: 60,
+        height: 45,
+    };
+
+    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
+    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/src/main.rs
new file mode 100644
index 000000000..a5d3f772a
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/listing-05-16/src/main.rs
@@ -0,0 +1,37 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+// ANCHOR: here
+impl Rectangle {
+    fn area(&self) -> u32 {
+        self.width * self.height
+    }
+}
+
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+    let rect2 = Rectangle {
+        width: 10,
+        height: 40,
+    };
+    let rect3 = Rectangle {
+        width: 60,
+        height: 45,
+    };
+
+    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
+    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/src/main.rs
new file mode 100644
index 000000000..0d993162b
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-01-tuple-structs/src/main.rs
@@ -0,0 +1,7 @@
+struct Color(i32, i32, i32);
+struct Point(i32, i32, i32);
+
+fn main() {
+    let black = Color(0, 0, 0);
+    let origin = Point(0, 0, 0);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.lock
new file mode 100644
index 000000000..bede081a0
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "structs"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.toml
new file mode 100644
index 000000000..d36dbc1d3
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt
new file mode 100644
index 000000000..e28da599c
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/output.txt
@@ -0,0 +1,31 @@
+$ cargo run
+   Compiling structs v0.1.0 (file:///projects/structs)
+error[E0106]: missing lifetime specifier
+ --> src/main.rs:3:15
+  |
+3 |     username: &str,
+  |               ^ expected named lifetime parameter
+  |
+help: consider introducing a named lifetime parameter
+  |
+1 ~ struct User<'a> {
+2 |     active: bool,
+3 ~     username: &'a str,
+  |
+
+error[E0106]: missing lifetime specifier
+ --> src/main.rs:4:12
+  |
+4 |     email: &str,
+  |            ^ expected named lifetime parameter
+  |
+help: consider introducing a named lifetime parameter
+  |
+1 ~ struct User<'a> {
+2 |     active: bool,
+3 |     username: &str,
+4 ~     email: &'a str,
+  |
+
+For more information about this error, try `rustc --explain E0106`.
+error: could not compile `structs` due to 2 previous errors
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/src/main.rs
new file mode 100644
index 000000000..96092d042
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-02-reference-in-struct/src/main.rs
@@ -0,0 +1,15 @@
+struct User {
+    active: bool,
+    username: &str,
+    email: &str,
+    sign_in_count: u64,
+}
+
+fn main() {
+    let user1 = User {
+        email: "someone@example.com",
+        username: "someusername123",
+        active: true,
+        sign_in_count: 1,
+    };
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
new file mode 100644
index 000000000..47fedc552
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-03-associated-functions/src/main.rs
@@ -0,0 +1,20 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+// ANCHOR: here
+impl Rectangle {
+    fn square(size: u32) -> Self {
+        Self {
+            width: size,
+            height: size,
+        }
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let sq = Rectangle::square(3);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.lock
new file mode 100644
index 000000000..fb30ed9c8
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "structs"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.toml
new file mode 100644
index 000000000..3232b6065
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "structs"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/src/main.rs
new file mode 100644
index 000000000..d48c94e99
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-04-unit-like-structs/src/main.rs
@@ -0,0 +1,5 @@
+struct AlwaysEqual;
+
+fn main() {
+    let subject = AlwaysEqual;
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt
new file mode 100644
index 000000000..268585995
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/output.txt
@@ -0,0 +1,9 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.61s
+     Running `target/debug/rectangles`
+[src/main.rs:10] 30 * scale = 60
+[src/main.rs:14] &rect1 = Rectangle {
+    width: 60,
+    height: 50,
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/src/main.rs
new file mode 100644
index 000000000..dd0342959
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-05-dbg-macro/src/main.rs
@@ -0,0 +1,15 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let scale = 2;
+    let rect1 = Rectangle {
+        width: dbg!(30 * scale),
+        height: 50,
+    };
+
+    dbg!(&rect1);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/src/main.rs
new file mode 100644
index 000000000..00e1de83b
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/no-listing-06-method-field-interaction/src/main.rs
@@ -0,0 +1,24 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+// ANCHOR: here
+impl Rectangle {
+    fn width(&self) -> bool {
+        self.width > 0
+    }
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    if rect1.width() {
+        println!("The rectangle has a nonzero width; it is {}", rect1.width);
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt
new file mode 100644
index 000000000..69c8b38a6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+error[E0277]: `Rectangle` doesn't implement `Debug`
+  --> src/main.rs:12:31
+   |
+12 |     println!("rect1 is {:?}", rect1);
+   |                               ^^^^^ `Rectangle` cannot be formatted using `{:?}`
+   |
+   = help: the trait `Debug` is not implemented for `Rectangle`
+   = note: add `#[derive(Debug)]` to `Rectangle` or manually `impl Debug for Rectangle`
+   = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `Rectangle` with `#[derive(Debug)]`
+   |
+1  | #[derive(Debug)]
+   |
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `rectangles` due to previous error
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/src/main.rs
new file mode 100644
index 000000000..019a357ab
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/src/main.rs
@@ -0,0 +1,13 @@
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!("rect1 is {:?}", rect1);
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.lock b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.lock
new file mode 100644
index 000000000..4aabe7da6
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangles"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.toml b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt
new file mode 100644
index 000000000..db6deed9b
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/output.txt
@@ -0,0 +1,8 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+     Running `target/debug/rectangles`
+rect1 is Rectangle {
+    width: 30,
+    height: 50,
+}
diff --git a/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs
new file mode 100644
index 000000000..84e32aee4
--- /dev/null
+++ b/src/doc/book/listings/ch05-using-structs-to-structure-related-data/output-only-02-pretty-debug/src/main.rs
@@ -0,0 +1,14 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!("rect1 is {:#?}", rect1);
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/src/main.rs
new file mode 100644
index 000000000..5b688e0f2
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-01/src/main.rs
@@ -0,0 +1,23 @@
+fn main() {
+    // ANCHOR: here
+    enum IpAddrKind {
+        V4,
+        V6,
+    }
+
+    struct IpAddr {
+        kind: IpAddrKind,
+        address: String,
+    }
+
+    let home = IpAddr {
+        kind: IpAddrKind::V4,
+        address: String::from("127.0.0.1"),
+    };
+
+    let loopback = IpAddr {
+        kind: IpAddrKind::V6,
+        address: String::from("::1"),
+    };
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/src/main.rs
new file mode 100644
index 000000000..3ba749788
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-02/src/main.rs
@@ -0,0 +1,10 @@
+// ANCHOR: here
+enum Message {
+    Quit,
+    Move { x: i32, y: i32 },
+    Write(String),
+    ChangeColor(i32, i32, i32),
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/src/main.rs
new file mode 100644
index 000000000..93dce48cb
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-03/src/main.rs
@@ -0,0 +1,19 @@
+// ANCHOR: here
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter,
+}
+
+fn value_in_cents(coin: Coin) -> u8 {
+    match coin {
+        Coin::Penny => 1,
+        Coin::Nickel => 5,
+        Coin::Dime => 10,
+        Coin::Quarter => 25,
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs
new file mode 100644
index 000000000..3ba384fba
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs
@@ -0,0 +1,17 @@
+// ANCHOR: here
+#[derive(Debug)] // so we can inspect the state in a minute
+enum UsState {
+    Alabama,
+    Alaska,
+    // --snip--
+}
+
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter(UsState),
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/src/main.rs
new file mode 100644
index 000000000..c86190aa7
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-05/src/main.rs
@@ -0,0 +1,18 @@
+fn main() {
+    // ANCHOR: here
+    fn plus_one(x: Option<i32>) -> Option<i32> {
+        match x {
+            // ANCHOR: first_arm
+            None => None,
+            // ANCHOR_END: first_arm
+            // ANCHOR: second_arm
+            Some(i) => Some(i + 1),
+            // ANCHOR_END: second_arm
+        }
+    }
+
+    let five = Some(5);
+    let six = plus_one(five);
+    let none = plus_one(None);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs
new file mode 100644
index 000000000..dc2bffb91
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let config_max = Some(3u8);
+    match config_max {
+        Some(max) => println!("The maximum is configured to be {}", max),
+        _ => (),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/src/main.rs
new file mode 100644
index 000000000..c631e56ba
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/src/main.rs
@@ -0,0 +1,22 @@
+// ANCHOR: def
+enum IpAddrKind {
+    V4,
+    V6,
+}
+// ANCHOR_END: def
+
+fn main() {
+    // ANCHOR: instance
+    let four = IpAddrKind::V4;
+    let six = IpAddrKind::V6;
+    // ANCHOR_END: instance
+
+    // ANCHOR: fn_call
+    route(IpAddrKind::V4);
+    route(IpAddrKind::V6);
+    // ANCHOR_END: fn_call
+}
+
+// ANCHOR: fn
+fn route(ip_kind: IpAddrKind) {}
+// ANCHOR_END: fn
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs
new file mode 100644
index 000000000..7d59b811f
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: here
+    enum IpAddr {
+        V4(String),
+        V6(String),
+    }
+
+    let home = IpAddr::V4(String::from("127.0.0.1"));
+
+    let loopback = IpAddr::V6(String::from("::1"));
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/src/main.rs
new file mode 100644
index 000000000..844a14041
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: here
+    enum IpAddr {
+        V4(u8, u8, u8, u8),
+        V6(String),
+    }
+
+    let home = IpAddr::V4(127, 0, 0, 1);
+
+    let loopback = IpAddr::V6(String::from("::1"));
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs
new file mode 100644
index 000000000..df451be8b
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs
@@ -0,0 +1,11 @@
+// ANCHOR: here
+struct QuitMessage; // unit struct
+struct MoveMessage {
+    x: i32,
+    y: i32,
+}
+struct WriteMessage(String); // tuple struct
+struct ChangeColorMessage(i32, i32, i32); // tuple struct
+                                          // ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs
new file mode 100644
index 000000000..66e0b6da1
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs
@@ -0,0 +1,19 @@
+fn main() {
+    enum Message {
+        Quit,
+        Move { x: i32, y: i32 },
+        Write(String),
+        ChangeColor(i32, i32, i32),
+    }
+
+    // ANCHOR: here
+    impl Message {
+        fn call(&self) {
+            // method body would be defined here
+        }
+    }
+
+    let m = Message::Write(String::from("hello"));
+    m.call();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs
new file mode 100644
index 000000000..be552bfa5
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let some_number = Some(5);
+    let some_char = Some('e');
+
+    let absent_number: Option<i32> = None;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt
new file mode 100644
index 000000000..d4a040e8e
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt
@@ -0,0 +1,22 @@
+$ cargo run
+   Compiling enums v0.1.0 (file:///projects/enums)
+error[E0277]: cannot add `Option<i8>` to `i8`
+ --> src/main.rs:5:17
+  |
+5 |     let sum = x + y;
+  |                 ^ no implementation for `i8 + Option<i8>`
+  |
+  = help: the trait `Add<Option<i8>>` is not implemented for `i8`
+  = help: the following other types implement trait `Add<Rhs>`:
+            <&'a f32 as Add<f32>>
+            <&'a f64 as Add<f64>>
+            <&'a i128 as Add<i128>>
+            <&'a i16 as Add<i16>>
+            <&'a i32 as Add<i32>>
+            <&'a i64 as Add<i64>>
+            <&'a i8 as Add<i8>>
+            <&'a isize as Add<isize>>
+          and 48 others
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `enums` due to previous error
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/src/main.rs
new file mode 100644
index 000000000..ec65565d4
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let x: i8 = 5;
+    let y: Option<i8> = Some(5);
+
+    let sum = x + y;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/src/main.rs
new file mode 100644
index 000000000..3f909dcaf
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/src/main.rs
@@ -0,0 +1,22 @@
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter,
+}
+
+// ANCHOR: here
+fn value_in_cents(coin: Coin) -> u8 {
+    match coin {
+        Coin::Penny => {
+            println!("Lucky penny!");
+            1
+        }
+        Coin::Nickel => 5,
+        Coin::Dime => 10,
+        Coin::Quarter => 25,
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs
new file mode 100644
index 000000000..a4d500c11
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/src/main.rs
@@ -0,0 +1,31 @@
+#[derive(Debug)]
+enum UsState {
+    Alabama,
+    Alaska,
+    // --snip--
+}
+
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter(UsState),
+}
+
+// ANCHOR: here
+fn value_in_cents(coin: Coin) -> u8 {
+    match coin {
+        Coin::Penny => 1,
+        Coin::Nickel => 5,
+        Coin::Dime => 10,
+        Coin::Quarter(state) => {
+            println!("State quarter from {:?}!", state);
+            25
+        }
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    value_in_cents(Coin::Quarter(UsState::Alaska));
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt
new file mode 100644
index 000000000..c5a6c51bb
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling enums v0.1.0 (file:///projects/enums)
+error[E0004]: non-exhaustive patterns: `None` not covered
+   --> src/main.rs:3:15
+    |
+3   |         match x {
+    |               ^ pattern `None` not covered
+    |
+note: `Option<i32>` defined here
+    = note: the matched value is of type `Option<i32>`
+help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
+    |
+4   ~             Some(i) => Some(i + 1),
+5   ~             None => todo!(),
+    |
+
+For more information about this error, try `rustc --explain E0004`.
+error: could not compile `enums` due to previous error
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/src/main.rs
new file mode 100644
index 000000000..f1963d0c9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    fn plus_one(x: Option<i32>) -> Option<i32> {
+        match x {
+            Some(i) => Some(i + 1),
+        }
+    }
+    // ANCHOR_END: here
+
+    let five = Some(5);
+    let six = plus_one(five);
+    let none = plus_one(None);
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs
new file mode 100644
index 000000000..735086d4e
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let config_max = Some(3u8);
+    if let Some(max) = config_max {
+        println!("The maximum is configured to be {}", max);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs
new file mode 100644
index 000000000..12c4c0fec
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs
@@ -0,0 +1,24 @@
+#[derive(Debug)]
+enum UsState {
+    Alabama,
+    Alaska,
+    // --snip--
+}
+
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter(UsState),
+}
+
+fn main() {
+    let coin = Coin::Penny;
+    // ANCHOR: here
+    let mut count = 0;
+    match coin {
+        Coin::Quarter(state) => println!("State quarter from {:?}!", state),
+        _ => count += 1,
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs
new file mode 100644
index 000000000..ba7eda27b
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs
@@ -0,0 +1,25 @@
+#[derive(Debug)]
+enum UsState {
+    Alabama,
+    Alaska,
+    // --snip--
+}
+
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter(UsState),
+}
+
+fn main() {
+    let coin = Coin::Penny;
+    // ANCHOR: here
+    let mut count = 0;
+    if let Coin::Quarter(state) = coin {
+        println!("State quarter from {:?}!", state);
+    } else {
+        count += 1;
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs
new file mode 100644
index 000000000..6ce0b5998
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let dice_roll = 9;
+    match dice_roll {
+        3 => add_fancy_hat(),
+        7 => remove_fancy_hat(),
+        other => move_player(other),
+    }
+
+    fn add_fancy_hat() {}
+    fn remove_fancy_hat() {}
+    fn move_player(num_spaces: u8) {}
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs
new file mode 100644
index 000000000..586e23751
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let dice_roll = 9;
+    match dice_roll {
+        3 => add_fancy_hat(),
+        7 => remove_fancy_hat(),
+        _ => reroll(),
+    }
+
+    fn add_fancy_hat() {}
+    fn remove_fancy_hat() {}
+    fn reroll() {}
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.lock b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.lock
new file mode 100644
index 000000000..f62e8ac45
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "enums"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml
new file mode 100644
index 000000000..e959295f9
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/src/main.rs b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/src/main.rs
new file mode 100644
index 000000000..e791742ee
--- /dev/null
+++ b/src/doc/book/listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    let dice_roll = 9;
+    match dice_roll {
+        3 => add_fancy_hat(),
+        7 => remove_fancy_hat(),
+        _ => (),
+    }
+
+    fn add_fancy_hat() {}
+    fn remove_fancy_hat() {}
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/src/lib.rs
new file mode 100644
index 000000000..591e24557
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-01/src/lib.rs
@@ -0,0 +1,15 @@
+mod front_of_house {
+    mod hosting {
+        fn add_to_waitlist() {}
+
+        fn seat_at_table() {}
+    }
+
+    mod serving {
+        fn take_order() {}
+
+        fn serve_order() {}
+
+        fn take_payment() {}
+    }
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/output.txt b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/output.txt
new file mode 100644
index 000000000..481dcb3f7
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/output.txt
@@ -0,0 +1,28 @@
+$ cargo build
+   Compiling restaurant v0.1.0 (file:///projects/restaurant)
+error[E0603]: module `hosting` is private
+ --> src/lib.rs:9:28
+  |
+9 |     crate::front_of_house::hosting::add_to_waitlist();
+  |                            ^^^^^^^ private module
+  |
+note: the module `hosting` is defined here
+ --> src/lib.rs:2:5
+  |
+2 |     mod hosting {
+  |     ^^^^^^^^^^^
+
+error[E0603]: module `hosting` is private
+  --> src/lib.rs:12:21
+   |
+12 |     front_of_house::hosting::add_to_waitlist();
+   |                     ^^^^^^^ private module
+   |
+note: the module `hosting` is defined here
+  --> src/lib.rs:2:5
+   |
+2  |     mod hosting {
+   |     ^^^^^^^^^^^
+
+For more information about this error, try `rustc --explain E0603`.
+error: could not compile `restaurant` due to 2 previous errors
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/src/lib.rs
new file mode 100644
index 000000000..0b8a43c6b
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-03/src/lib.rs
@@ -0,0 +1,13 @@
+mod front_of_house {
+    mod hosting {
+        fn add_to_waitlist() {}
+    }
+}
+
+pub fn eat_at_restaurant() {
+    // Absolute path
+    crate::front_of_house::hosting::add_to_waitlist();
+
+    // Relative path
+    front_of_house::hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/output.txt b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/output.txt
new file mode 100644
index 000000000..63eb89a14
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/output.txt
@@ -0,0 +1,28 @@
+$ cargo build
+   Compiling restaurant v0.1.0 (file:///projects/restaurant)
+error[E0603]: function `add_to_waitlist` is private
+ --> src/lib.rs:9:37
+  |
+9 |     crate::front_of_house::hosting::add_to_waitlist();
+  |                                     ^^^^^^^^^^^^^^^ private function
+  |
+note: the function `add_to_waitlist` is defined here
+ --> src/lib.rs:3:9
+  |
+3 |         fn add_to_waitlist() {}
+  |         ^^^^^^^^^^^^^^^^^^^^
+
+error[E0603]: function `add_to_waitlist` is private
+  --> src/lib.rs:12:30
+   |
+12 |     front_of_house::hosting::add_to_waitlist();
+   |                              ^^^^^^^^^^^^^^^ private function
+   |
+note: the function `add_to_waitlist` is defined here
+  --> src/lib.rs:3:9
+   |
+3  |         fn add_to_waitlist() {}
+   |         ^^^^^^^^^^^^^^^^^^^^
+
+For more information about this error, try `rustc --explain E0603`.
+error: could not compile `restaurant` due to 2 previous errors
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/src/lib.rs
new file mode 100644
index 000000000..05372dbe5
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-05/src/lib.rs
@@ -0,0 +1,13 @@
+mod front_of_house {
+    pub mod hosting {
+        fn add_to_waitlist() {}
+    }
+}
+
+pub fn eat_at_restaurant() {
+    // Absolute path
+    crate::front_of_house::hosting::add_to_waitlist();
+
+    // Relative path
+    front_of_house::hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/src/lib.rs
new file mode 100644
index 000000000..7b89ee7cd
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-07/src/lib.rs
@@ -0,0 +1,13 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+pub fn eat_at_restaurant() {
+    // Absolute path
+    crate::front_of_house::hosting::add_to_waitlist();
+
+    // Relative path
+    front_of_house::hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/src/lib.rs
new file mode 100644
index 000000000..b3ddb4f0f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-08/src/lib.rs
@@ -0,0 +1,10 @@
+fn deliver_order() {}
+
+mod back_of_house {
+    fn fix_incorrect_order() {
+        cook_order();
+        super::deliver_order();
+    }
+
+    fn cook_order() {}
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/src/lib.rs
new file mode 100644
index 000000000..92c4695d5
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-09/src/lib.rs
@@ -0,0 +1,27 @@
+mod back_of_house {
+    pub struct Breakfast {
+        pub toast: String,
+        seasonal_fruit: String,
+    }
+
+    impl Breakfast {
+        pub fn summer(toast: &str) -> Breakfast {
+            Breakfast {
+                toast: String::from(toast),
+                seasonal_fruit: String::from("peaches"),
+            }
+        }
+    }
+}
+
+pub fn eat_at_restaurant() {
+    // Order a breakfast in the summer with Rye toast
+    let mut meal = back_of_house::Breakfast::summer("Rye");
+    // Change our mind about what bread we'd like
+    meal.toast = String::from("Wheat");
+    println!("I'd like {} toast please", meal.toast);
+
+    // The next line won't compile if we uncomment it; we're not allowed
+    // to see or modify the seasonal fruit that comes with the meal
+    // meal.seasonal_fruit = String::from("blueberries");
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/src/lib.rs
new file mode 100644
index 000000000..908f1dfb7
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-10/src/lib.rs
@@ -0,0 +1,11 @@
+mod back_of_house {
+    pub enum Appetizer {
+        Soup,
+        Salad,
+    }
+}
+
+pub fn eat_at_restaurant() {
+    let order1 = back_of_house::Appetizer::Soup;
+    let order2 = back_of_house::Appetizer::Salad;
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/src/lib.rs
new file mode 100644
index 000000000..cf31a9c97
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-11/src/lib.rs
@@ -0,0 +1,11 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+use crate::front_of_house::hosting;
+
+pub fn eat_at_restaurant() {
+    hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/output.txt b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/output.txt
new file mode 100644
index 000000000..39b650540
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/output.txt
@@ -0,0 +1,19 @@
+$ cargo build
+   Compiling restaurant v0.1.0 (file:///projects/restaurant)
+error[E0433]: failed to resolve: use of undeclared crate or module `hosting`
+  --> src/lib.rs:11:9
+   |
+11 |         hosting::add_to_waitlist();
+   |         ^^^^^^^ use of undeclared crate or module `hosting`
+
+warning: unused import: `crate::front_of_house::hosting`
+ --> src/lib.rs:7:5
+  |
+7 | use crate::front_of_house::hosting;
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  |
+  = note: `#[warn(unused_imports)]` on by default
+
+For more information about this error, try `rustc --explain E0433`.
+warning: `restaurant` (lib) generated 1 warning
+error: could not compile `restaurant` due to previous error; 1 warning emitted
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs
new file mode 100644
index 000000000..afc759423
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-12/src/lib.rs
@@ -0,0 +1,13 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+use crate::front_of_house::hosting;
+
+mod customer {
+    pub fn eat_at_restaurant() {
+        hosting::add_to_waitlist();
+    }
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/src/lib.rs
new file mode 100644
index 000000000..c72994efe
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-13/src/lib.rs
@@ -0,0 +1,11 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+use crate::front_of_house::hosting::add_to_waitlist;
+
+pub fn eat_at_restaurant() {
+    add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/src/main.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/src/main.rs
new file mode 100644
index 000000000..4379e7c79
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-14/src/main.rs
@@ -0,0 +1,6 @@
+use std::collections::HashMap;
+
+fn main() {
+    let mut map = HashMap::new();
+    map.insert(1, 2);
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/src/lib.rs
new file mode 100644
index 000000000..bfac3a07a
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-15/src/lib.rs
@@ -0,0 +1,18 @@
+// ANCHOR: here
+use std::fmt;
+use std::io;
+
+fn function1() -> fmt::Result {
+    // --snip--
+    // ANCHOR_END: here
+    Ok(())
+    // ANCHOR: here
+}
+
+fn function2() -> io::Result<()> {
+    // --snip--
+    // ANCHOR_END: here
+    Ok(())
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/src/lib.rs
new file mode 100644
index 000000000..843490b4d
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-16/src/lib.rs
@@ -0,0 +1,18 @@
+// ANCHOR: here
+use std::fmt::Result;
+use std::io::Result as IoResult;
+
+fn function1() -> Result {
+    // --snip--
+    // ANCHOR_END: here
+    Ok(())
+    // ANCHOR: here
+}
+
+fn function2() -> IoResult<()> {
+    // --snip--
+    // ANCHOR_END: here
+    Ok(())
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/src/lib.rs
new file mode 100644
index 000000000..45cf1bac9
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-17/src/lib.rs
@@ -0,0 +1,11 @@
+mod front_of_house {
+    pub mod hosting {
+        pub fn add_to_waitlist() {}
+    }
+}
+
+pub use crate::front_of_house::hosting;
+
+pub fn eat_at_restaurant() {
+    hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
+
+[[package]]
+name = "rand"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.toml
new file mode 100644
index 000000000..15b3fffca
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/src/main.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/src/main.rs
new file mode 100644
index 000000000..2f69412a4
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-18/src/main.rs
@@ -0,0 +1,32 @@
+use rand::Rng;
+// ANCHOR: here
+// --snip--
+use std::{cmp::Ordering, io};
+// --snip--
+// ANCHOR_END: here
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    let guess: u32 = guess.trim().parse().expect("Please type a number!");
+
+    println!("You guessed: {guess}");
+
+    match guess.cmp(&secret_number) {
+        Ordering::Less => println!("Too small!"),
+        Ordering::Greater => println!("Too big!"),
+        Ordering::Equal => println!("You win!"),
+    }
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/src/lib.rs
new file mode 100644
index 000000000..3fee46c44
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-19/src/lib.rs
@@ -0,0 +1,2 @@
+use std::io;
+use std::io::Write;
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/src/lib.rs
new file mode 100644
index 000000000..341f40a47
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-20/src/lib.rs
@@ -0,0 +1 @@
+use std::io::{self, Write};
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/front_of_house.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/front_of_house.rs
new file mode 100644
index 000000000..6875dfdb6
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/front_of_house.rs
@@ -0,0 +1,3 @@
+pub mod hosting {
+    pub fn add_to_waitlist() {}
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/lib.rs
new file mode 100644
index 000000000..d6769556a
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/listing-07-21-and-22/src/lib.rs
@@ -0,0 +1,7 @@
+mod front_of_house;
+
+pub use crate::front_of_house::hosting;
+
+pub fn eat_at_restaurant() {
+    hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
+
+[[package]]
+name = "rand"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.toml
new file mode 100644
index 000000000..cc63f6f02
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/src/main.rs b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/src/main.rs
new file mode 100644
index 000000000..3a02c9963
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-01-use-std-unnested/src/main.rs
@@ -0,0 +1,31 @@
+use rand::Rng;
+// ANCHOR: here
+// --snip--
+use std::cmp::Ordering;
+use std::io;
+// --snip--
+// ANCHOR_END: here
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("The secret number is: {secret_number}");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    println!("You guessed: {guess}");
+
+    match guess.cmp(&secret_number) {
+        Ordering::Less => println!("Too small!"),
+        Ordering::Greater => println!("Too big!"),
+        Ordering::Equal => println!("You win!"),
+    }
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.lock
new file mode 100644
index 000000000..f25ab358f
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "restaurant"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.toml
new file mode 100644
index 000000000..60cec7cb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house.rs b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house.rs
new file mode 100644
index 000000000..d0a8154ea
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house.rs
@@ -0,0 +1 @@
+pub mod hosting;
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house/hosting.rs b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house/hosting.rs
new file mode 100644
index 000000000..d65f3afd1
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/front_of_house/hosting.rs
@@ -0,0 +1 @@
+pub fn add_to_waitlist() {}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/lib.rs b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/lib.rs
new file mode 100644
index 000000000..d6769556a
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/no-listing-02-extracting-hosting/src/lib.rs
@@ -0,0 +1,7 @@
+mod front_of_house;
+
+pub use crate::front_of_house::hosting;
+
+pub fn eat_at_restaurant() {
+    hosting::add_to_waitlist();
+}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.lock b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.lock
new file mode 100644
index 000000000..4773c201d
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "backyard"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.toml b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.toml
new file mode 100644
index 000000000..6e904abbe
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "backyard"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/output.txt b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/output.txt
new file mode 100644
index 000000000..e36a45eb0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling backyard v0.1.0 (file:///projects/backyard)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.36s
+     Running `target/debug/backyard`
+I'm growing Asparagus!
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden.rs b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden.rs
new file mode 100644
index 000000000..6c7f9b1cb
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden.rs
@@ -0,0 +1 @@
+pub mod vegetables;
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden/vegetables.rs b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden/vegetables.rs
new file mode 100644
index 000000000..b00f785ef
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/garden/vegetables.rs
@@ -0,0 +1,2 @@
+#[derive(Debug)]
+pub struct Asparagus {}
diff --git a/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs
new file mode 100644
index 000000000..7a024a9a0
--- /dev/null
+++ b/src/doc/book/listings/ch07-managing-growing-projects/quick-reference-example/src/main.rs
@@ -0,0 +1,8 @@
+use crate::garden::vegetables::Asparagus;
+
+pub mod garden;
+
+fn main() {
+    let plant = Asparagus {};
+    println!("I'm growing {:?}!", plant);
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-01/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-01/src/main.rs
new file mode 100644
index 000000000..45e45581e
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-01/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let v: Vec<i32> = Vec::new();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-02/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-02/src/main.rs
new file mode 100644
index 000000000..3b10a53e8
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-02/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let v = vec![1, 2, 3];
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-03/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-03/src/main.rs
new file mode 100644
index 000000000..147223f9a
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-03/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    let mut v = Vec::new();
+
+    v.push(5);
+    v.push(6);
+    v.push(7);
+    v.push(8);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-04/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-04/src/main.rs
new file mode 100644
index 000000000..fa4e090d5
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-04/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let v = vec![1, 2, 3, 4, 5];
+
+    let third: &i32 = &v[2];
+    println!("The third element is {}", third);
+
+    let third: Option<&i32> = v.get(2);
+    match third {
+        Some(third) => println!("The third element is {}", third),
+        None => println!("There is no third element."),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-05/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-05/src/main.rs
new file mode 100644
index 000000000..783d9b110
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-05/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let v = vec![1, 2, 3, 4, 5];
+
+    let does_not_exist = &v[100];
+    let does_not_exist = v.get(100);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-06/output.txt b/src/doc/book/listings/ch08-common-collections/listing-08-06/output.txt
new file mode 100644
index 000000000..ab512a9e6
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-06/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling collections v0.1.0 (file:///projects/collections)
+error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
+ --> src/main.rs:6:5
+  |
+4 |     let first = &v[0];
+  |                  - immutable borrow occurs here
+5 | 
+6 |     v.push(6);
+  |     ^^^^^^^^^ mutable borrow occurs here
+7 | 
+8 |     println!("The first element is: {}", first);
+  |                                          ----- immutable borrow later used here
+
+For more information about this error, try `rustc --explain E0502`.
+error: could not compile `collections` due to previous error
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-06/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-06/src/main.rs
new file mode 100644
index 000000000..1b42274a6
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-06/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let mut v = vec![1, 2, 3, 4, 5];
+
+    let first = &v[0];
+
+    v.push(6);
+
+    println!("The first element is: {}", first);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-07/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-07/src/main.rs
new file mode 100644
index 000000000..38b97784b
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-07/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let v = vec![100, 32, 57];
+    for i in &v {
+        println!("{}", i);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-08/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-08/src/main.rs
new file mode 100644
index 000000000..c62ba21b4
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-08/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let mut v = vec![100, 32, 57];
+    for i in &mut v {
+        *i += 50;
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-09/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-09/src/main.rs
new file mode 100644
index 000000000..c2198883b
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-09/src/main.rs
@@ -0,0 +1,15 @@
+fn main() {
+    // ANCHOR: here
+    enum SpreadsheetCell {
+        Int(i32),
+        Float(f64),
+        Text(String),
+    }
+
+    let row = vec![
+        SpreadsheetCell::Int(3),
+        SpreadsheetCell::Text(String::from("blue")),
+        SpreadsheetCell::Float(10.12),
+    ];
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-10/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-10/src/main.rs
new file mode 100644
index 000000000..abda2db66
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-10/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    {
+        let v = vec![1, 2, 3, 4];
+
+        // do stuff with v
+    } // <- v goes out of scope and is freed here
+      // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-11/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-11/src/main.rs
new file mode 100644
index 000000000..4cf4c81c2
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-11/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::new();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-12/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-12/src/main.rs
new file mode 100644
index 000000000..d9e5e768a
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-12/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    let data = "initial contents";
+
+    let s = data.to_string();
+
+    // the method also works on a literal directly:
+    let s = "initial contents".to_string();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-13/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-13/src/main.rs
new file mode 100644
index 000000000..b81e37453
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-13/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let s = String::from("initial contents");
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-14/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-14/src/main.rs
new file mode 100644
index 000000000..f701fd578
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-14/src/main.rs
@@ -0,0 +1,19 @@
+fn main() {
+    // ANCHOR: here
+    let hello = String::from("السلام عليكم");
+    let hello = String::from("Dobrý den");
+    let hello = String::from("Hello");
+    let hello = String::from("שָׁלוֹם");
+    let hello = String::from("नमस्ते");
+    let hello = String::from("こんにちは");
+    let hello = String::from("안녕하세요");
+    let hello = String::from("你好");
+    let hello = String::from("Olá");
+    // ANCHOR: russian
+    let hello = String::from("Здравствуйте");
+    // ANCHOR_END: russian
+    // ANCHOR: spanish
+    let hello = String::from("Hola");
+    // ANCHOR_END: spanish
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-15/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-15/src/main.rs
new file mode 100644
index 000000000..7dec657d9
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-15/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("foo");
+    s.push_str("bar");
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-16/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-16/src/main.rs
new file mode 100644
index 000000000..8938dc143
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-16/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let mut s1 = String::from("foo");
+    let s2 = "bar";
+    s1.push_str(s2);
+    println!("s2 is {}", s2);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-17/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-17/src/main.rs
new file mode 100644
index 000000000..0a9e8cc0a
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-17/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let mut s = String::from("lo");
+    s.push('l');
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-18/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-18/src/main.rs
new file mode 100644
index 000000000..93939a69f
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-18/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("Hello, ");
+    let s2 = String::from("world!");
+    let s3 = s1 + &s2; // note s1 has been moved here and can no longer be used
+                       // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-19/output.txt b/src/doc/book/listings/ch08-common-collections/listing-08-19/output.txt
new file mode 100644
index 000000000..95577772e
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-19/output.txt
@@ -0,0 +1,20 @@
+$ cargo run
+   Compiling collections v0.1.0 (file:///projects/collections)
+error[E0277]: the type `String` cannot be indexed by `{integer}`
+ --> src/main.rs:3:13
+  |
+3 |     let h = s1[0];
+  |             ^^^^^ `String` cannot be indexed by `{integer}`
+  |
+  = help: the trait `Index<{integer}>` is not implemented for `String`
+  = help: the following other types implement trait `Index<Idx>`:
+            <String as Index<RangeFrom<usize>>>
+            <String as Index<RangeFull>>
+            <String as Index<RangeInclusive<usize>>>
+            <String as Index<RangeTo<usize>>>
+            <String as Index<RangeToInclusive<usize>>>
+            <String as Index<std::ops::Range<usize>>>
+            <str as Index<I>>
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `collections` due to previous error
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-19/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-19/src/main.rs
new file mode 100644
index 000000000..fc08e9cea
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-19/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("hello");
+    let h = s1[0];
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-20/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-20/src/main.rs
new file mode 100644
index 000000000..54c201091
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-20/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let mut scores = HashMap::new();
+
+    scores.insert(String::from("Blue"), 10);
+    scores.insert(String::from("Yellow"), 50);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-21/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-21/src/main.rs
new file mode 100644
index 000000000..07551549d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-21/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let mut scores = HashMap::new();
+
+    scores.insert(String::from("Blue"), 10);
+    scores.insert(String::from("Yellow"), 50);
+
+    let team_name = String::from("Blue");
+    let score = scores.get(&team_name).copied().unwrap_or(0);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-22/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-22/src/main.rs
new file mode 100644
index 000000000..2b2a73f94
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-22/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let field_name = String::from("Favorite color");
+    let field_value = String::from("Blue");
+
+    let mut map = HashMap::new();
+    map.insert(field_name, field_value);
+    // field_name and field_value are invalid at this point, try using them and
+    // see what compiler error you get!
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-23/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-23/src/main.rs
new file mode 100644
index 000000000..e8684cf2b
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-23/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let mut scores = HashMap::new();
+
+    scores.insert(String::from("Blue"), 10);
+    scores.insert(String::from("Blue"), 25);
+
+    println!("{:?}", scores);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-24/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-24/src/main.rs
new file mode 100644
index 000000000..3ad97b57a
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-24/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let mut scores = HashMap::new();
+    scores.insert(String::from("Blue"), 10);
+
+    scores.entry(String::from("Yellow")).or_insert(50);
+    scores.entry(String::from("Blue")).or_insert(50);
+
+    println!("{:?}", scores);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs
new file mode 100644
index 000000000..f3f6aa166
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs
@@ -0,0 +1,16 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let text = "hello world wonderful world";
+
+    let mut map = HashMap::new();
+
+    for word in text.split_whitespace() {
+        let count = map.entry(word).or_insert(0);
+        *count += 1;
+    }
+
+    println!("{:?}", map);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.lock b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.toml b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/src/main.rs b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/src/main.rs
new file mode 100644
index 000000000..4995650d1
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-01-concat-multiple-strings/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("tic");
+    let s2 = String::from("tac");
+    let s3 = String::from("toe");
+
+    let s = s1 + "-" + &s2 + "-" + &s3;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.lock b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.toml b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-02-format/src/main.rs b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/src/main.rs
new file mode 100644
index 000000000..4a38e63d2
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-02-format/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let s1 = String::from("tic");
+    let s2 = String::from("tac");
+    let s3 = String::from("toe");
+
+    let s = format!("{}-{}-{}", s1, s2, s3);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.lock b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.toml b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs
new file mode 100644
index 000000000..2e7dc02e6
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    use std::collections::HashMap;
+
+    let mut scores = HashMap::new();
+
+    scores.insert(String::from("Blue"), 10);
+    scores.insert(String::from("Yellow"), 50);
+
+    for (key, value) in &scores {
+        println!("{}: {}", key, value);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.lock b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.lock
new file mode 100644
index 000000000..d3daeff7d
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "collections"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.toml b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.toml
new file mode 100644
index 000000000..fe4959823
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "collections"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt
new file mode 100644
index 000000000..98d1f183a
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling collections v0.1.0 (file:///projects/collections)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+     Running `target/debug/collections`
+thread 'main' panicked at 'byte index 1 is not a char boundary; it is inside 'З' (bytes 0..2) of `Здравствуйте`', library/core/src/str/mod.rs:127:5
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/src/main.rs b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/src/main.rs
new file mode 100644
index 000000000..9283ff5bd
--- /dev/null
+++ b/src/doc/book/listings/ch08-common-collections/output-only-01-not-char-boundary/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let hello = "Здравствуйте";
+
+    let s = &hello[0..1];
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.lock
new file mode 100644
index 000000000..4fe030fab
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "panic"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.toml
new file mode 100644
index 000000000..660e2c819
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "panic"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-01/output.txt b/src/doc/book/listings/ch09-error-handling/listing-09-01/output.txt
new file mode 100644
index 000000000..89aebb952
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-01/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling panic v0.1.0 (file:///projects/panic)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.27s
+     Running `target/debug/panic`
+thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 99', src/main.rs:4:5
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-01/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-01/src/main.rs
new file mode 100644
index 000000000..70194abd7
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-01/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let v = vec![1, 2, 3];
+
+    v[99];
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-03/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-03/src/main.rs
new file mode 100644
index 000000000..2342904ed
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-03/src/main.rs
@@ -0,0 +1,5 @@
+use std::fs::File;
+
+fn main() {
+    let greeting_file_result = File::open("hello.txt");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-04/output.txt b/src/doc/book/listings/ch09-error-handling/listing-09-04/output.txt
new file mode 100644
index 000000000..f776a591c
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-04/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling error-handling v0.1.0 (file:///projects/error-handling)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.73s
+     Running `target/debug/error-handling`
+thread 'main' panicked at 'Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/main.rs:8:23
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-04/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-04/src/main.rs
new file mode 100644
index 000000000..69da109fe
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-04/src/main.rs
@@ -0,0 +1,10 @@
+use std::fs::File;
+
+fn main() {
+    let greeting_file_result = File::open("hello.txt");
+
+    let greeting_file = match greeting_file_result {
+        Ok(file) => file,
+        Err(error) => panic!("Problem opening the file: {:?}", error),
+    };
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-05/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-05/src/main.rs
new file mode 100644
index 000000000..83ea01044
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-05/src/main.rs
@@ -0,0 +1,19 @@
+use std::fs::File;
+use std::io::ErrorKind;
+
+fn main() {
+    let greeting_file_result = File::open("hello.txt");
+
+    let greeting_file = match greeting_file_result {
+        Ok(file) => file,
+        Err(error) => match error.kind() {
+            ErrorKind::NotFound => match File::create("hello.txt") {
+                Ok(fc) => fc,
+                Err(e) => panic!("Problem creating the file: {:?}", e),
+            },
+            other_error => {
+                panic!("Problem opening the file: {:?}", other_error);
+            }
+        },
+    };
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-06/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-06/src/main.rs
new file mode 100644
index 000000000..a70734cb5
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-06/src/main.rs
@@ -0,0 +1,24 @@
+// ANCHOR: here
+use std::fs::File;
+use std::io::{self, Read};
+
+fn read_username_from_file() -> Result<String, io::Error> {
+    let username_file_result = File::open("hello.txt");
+
+    let mut username_file = match username_file_result {
+        Ok(file) => file,
+        Err(e) => return Err(e),
+    };
+
+    let mut username = String::new();
+
+    match username_file.read_to_string(&mut username) {
+        Ok(_) => Ok(username),
+        Err(e) => Err(e),
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let username = read_username_from_file().expect("Unable to get username");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-07/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-07/src/main.rs
new file mode 100644
index 000000000..f4564f670
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-07/src/main.rs
@@ -0,0 +1,16 @@
+// ANCHOR: here
+use std::fs::File;
+use std::io;
+use std::io::Read;
+
+fn read_username_from_file() -> Result<String, io::Error> {
+    let mut username_file = File::open("hello.txt")?;
+    let mut username = String::new();
+    username_file.read_to_string(&mut username)?;
+    Ok(username)
+}
+// ANCHOR_END: here
+
+fn main() {
+    let username = read_username_from_file().expect("Unable to get username");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-08/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-08/src/main.rs
new file mode 100644
index 000000000..c3c6e23ef
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-08/src/main.rs
@@ -0,0 +1,17 @@
+// ANCHOR: here
+use std::fs::File;
+use std::io;
+use std::io::Read;
+
+fn read_username_from_file() -> Result<String, io::Error> {
+    let mut username = String::new();
+
+    File::open("hello.txt")?.read_to_string(&mut username)?;
+
+    Ok(username)
+}
+// ANCHOR_END: here
+
+fn main() {
+    let username = read_username_from_file().expect("Unable to get username");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-09/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-09/src/main.rs
new file mode 100644
index 000000000..4597dc2ee
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-09/src/main.rs
@@ -0,0 +1,12 @@
+// ANCHOR: here
+use std::fs;
+use std::io;
+
+fn read_username_from_file() -> Result<String, io::Error> {
+    fs::read_to_string("hello.txt")
+}
+// ANCHOR_END: here
+
+fn main() {
+    let username = read_username_from_file().expect("Unable to get username");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-10/output.txt b/src/doc/book/listings/ch09-error-handling/listing-09-10/output.txt
new file mode 100644
index 000000000..26e4ff8cc
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-10/output.txt
@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling error-handling v0.1.0 (file:///projects/error-handling)
+error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
+ --> src/main.rs:4:48
+  |
+3 | / fn main() {
+4 | |     let greeting_file = File::open("hello.txt")?;
+  | |                                                ^ cannot use the `?` operator in a function that returns `()`
+5 | | }
+  | |_- this function should return `Result` or `Option` to accept `?`
+  |
+  = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `error-handling` due to previous error
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-10/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-10/src/main.rs
new file mode 100644
index 000000000..38b005480
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-10/src/main.rs
@@ -0,0 +1,5 @@
+use std::fs::File;
+
+fn main() {
+    let greeting_file = File::open("hello.txt")?;
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.lock
new file mode 100644
index 000000000..7320ae639
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "error-handling"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-11/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-11/src/main.rs
new file mode 100644
index 000000000..bd5322786
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-11/src/main.rs
@@ -0,0 +1,15 @@
+// ANCHOR: here
+fn last_char_of_first_line(text: &str) -> Option<char> {
+    text.lines().next()?.chars().last()
+}
+// ANCHOR_END: here
+
+fn main() {
+    assert_eq!(
+        last_char_of_first_line("Hello, world\nHow are you today?"),
+        Some('d')
+    );
+
+    assert_eq!(last_char_of_first_line(""), None);
+    assert_eq!(last_char_of_first_line("\nhi"), None);
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-12/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-12/src/main.rs
new file mode 100644
index 000000000..b0f7445f4
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-12/src/main.rs
@@ -0,0 +1,8 @@
+use std::error::Error;
+use std::fs::File;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let greeting_file = File::open("hello.txt")?;
+
+    Ok(())
+}
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.lock b/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
+
+[[package]]
+name = "rand"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.toml b/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.toml
new file mode 100644
index 000000000..15b3fffca
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-13/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch09-error-handling/listing-09-13/src/main.rs b/src/doc/book/listings/ch09-error-handling/listing-09-13/src/main.rs
new file mode 100644
index 000000000..9e07c1ee2
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/listing-09-13/src/main.rs
@@ -0,0 +1,55 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+// ANCHOR: here
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 || value > 100 {
+            panic!("Guess value must be between 1 and 100, got {}.", value);
+        }
+
+        Guess { value }
+    }
+
+    pub fn value(&self) -> i32 {
+        self.value
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    loop {
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: i32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        let guess = Guess::new(guess);
+
+        match guess.value().cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.lock b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.lock
new file mode 100644
index 000000000..4fe030fab
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "panic"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.toml b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.toml
new file mode 100644
index 000000000..660e2c819
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "panic"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/output.txt b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/output.txt
new file mode 100644
index 000000000..b25ed85d7
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling panic v0.1.0 (file:///projects/panic)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.25s
+     Running `target/debug/panic`
+thread 'main' panicked at 'crash and burn', src/main.rs:2:5
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/src/main.rs b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/src/main.rs
new file mode 100644
index 000000000..32a4c243d
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-01-panic/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    panic!("crash and burn");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.lock b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.toml b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/src/main.rs b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/src/main.rs
new file mode 100644
index 000000000..92e9452f1
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-04-unwrap/src/main.rs
@@ -0,0 +1,5 @@
+use std::fs::File;
+
+fn main() {
+    let greeting_file = File::open("hello.txt").unwrap();
+}
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.lock b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.toml b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/src/main.rs b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/src/main.rs
new file mode 100644
index 000000000..3d36fa5b1
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-05-expect/src/main.rs
@@ -0,0 +1,6 @@
+use std::fs::File;
+
+fn main() {
+    let greeting_file = File::open("hello.txt")
+        .expect("hello.txt should be included in this project");
+}
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.lock b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.lock
new file mode 100644
index 000000000..1fa96b797
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "error-handling"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.toml b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.toml
new file mode 100644
index 000000000..c496db783
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "error-handling"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/src/main.rs b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/src/main.rs
new file mode 100644
index 000000000..3e1835266
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-08-unwrap-that-cant-fail/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    use std::net::IpAddr;
+
+    let home: IpAddr = "127.0.0.1"
+        .parse()
+        .expect("Hardcoded IP address should be valid");
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.lock b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.lock
new file mode 100644
index 000000000..0a2f222c2
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.lock
@@ -0,0 +1,83 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
+
+[[package]]
+name = "rand"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.toml b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.toml
new file mode 100644
index 000000000..15b3fffca
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/src/main.rs b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/src/main.rs
new file mode 100644
index 000000000..fc22cbc5e
--- /dev/null
+++ b/src/doc/book/listings/ch09-error-handling/no-listing-09-guess-out-of-range/src/main.rs
@@ -0,0 +1,47 @@
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    // ANCHOR: here
+    loop {
+        // --snip--
+
+        // ANCHOR_END: here
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        // ANCHOR: here
+        let guess: i32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        if guess < 1 || guess > 100 {
+            println!("The secret number will be between 1 and 100.");
+            continue;
+        }
+
+        match guess.cmp(&secret_number) {
+            // --snip--
+            // ANCHOR_END: here
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+        // ANCHOR: here
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs
new file mode 100644
index 000000000..a4dba7ed4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-01/src/main.rs
@@ -0,0 +1,18 @@
+// ANCHOR: here
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+
+    let mut largest = &number_list[0];
+
+    for number in &number_list {
+        if number > largest {
+            largest = number;
+        }
+    }
+
+    println!("The largest number is {}", largest);
+    // ANCHOR_END: here
+    assert_eq!(*largest, 100);
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs
new file mode 100644
index 000000000..8c523a8be
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-02/src/main.rs
@@ -0,0 +1,25 @@
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+
+    let mut largest = &number_list[0];
+
+    for number in &number_list {
+        if number > largest {
+            largest = number;
+        }
+    }
+
+    println!("The largest number is {}", largest);
+
+    let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
+
+    let mut largest = &number_list[0];
+
+    for number in &number_list {
+        if number > largest {
+            largest = number;
+        }
+    }
+
+    println!("The largest number is {}", largest);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs
new file mode 100644
index 000000000..899222909
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-03/src/main.rs
@@ -0,0 +1,31 @@
+// ANCHOR: here
+fn largest(list: &[i32]) -> &i32 {
+    let mut largest = &list[0];
+
+    for item in list {
+        if item > largest {
+            largest = item;
+        }
+    }
+
+    largest
+}
+
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+
+    let result = largest(&number_list);
+    println!("The largest number is {}", result);
+    // ANCHOR_END: here
+    assert_eq!(*result, 100);
+    // ANCHOR: here
+
+    let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
+
+    let result = largest(&number_list);
+    println!("The largest number is {}", result);
+    // ANCHOR_END: here
+    assert_eq!(*result, 6000);
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs
new file mode 100644
index 000000000..a47e3f232
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs
@@ -0,0 +1,43 @@
+// ANCHOR: here
+fn largest_i32(list: &[i32]) -> &i32 {
+    let mut largest = &list[0];
+
+    for item in list {
+        if item > largest {
+            largest = item;
+        }
+    }
+
+    largest
+}
+
+fn largest_char(list: &[char]) -> &char {
+    let mut largest = &list[0];
+
+    for item in list {
+        if item > largest {
+            largest = item;
+        }
+    }
+
+    largest
+}
+
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+
+    let result = largest_i32(&number_list);
+    println!("The largest number is {}", result);
+    // ANCHOR_END: here
+    assert_eq!(*result, 100);
+    // ANCHOR: here
+
+    let char_list = vec!['y', 'm', 'a', 'q'];
+
+    let result = largest_char(&char_list);
+    println!("The largest char is {}", result);
+    // ANCHOR_END: here
+    assert_eq!(*result, 'y');
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt
new file mode 100644
index 000000000..1a705ed57
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt
@@ -0,0 +1,17 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0369]: binary operation `>` cannot be applied to type `&T`
+ --> src/main.rs:5:17
+  |
+5 |         if item > largest {
+  |            ---- ^ ------- &T
+  |            |
+  |            &T
+  |
+help: consider restricting type parameter `T`
+  |
+1 | fn largest<T: std::cmp::PartialOrd>(list: &[T]) -> &T {
+  |             ++++++++++++++++++++++
+
+For more information about this error, try `rustc --explain E0369`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs
new file mode 100644
index 000000000..df33743f7
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs
@@ -0,0 +1,23 @@
+fn largest<T>(list: &[T]) -> &T {
+    let mut largest = &list[0];
+
+    for item in list {
+        if item > largest {
+            largest = item;
+        }
+    }
+
+    largest
+}
+
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+
+    let result = largest(&number_list);
+    println!("The largest number is {}", result);
+
+    let char_list = vec!['y', 'm', 'a', 'q'];
+
+    let result = largest(&char_list);
+    println!("The largest char is {}", result);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/src/main.rs
new file mode 100644
index 000000000..4252593df
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-06/src/main.rs
@@ -0,0 +1,9 @@
+struct Point<T> {
+    x: T,
+    y: T,
+}
+
+fn main() {
+    let integer = Point { x: 5, y: 10 };
+    let float = Point { x: 1.0, y: 4.0 };
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt
new file mode 100644
index 000000000..2482c3843
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/output.txt
@@ -0,0 +1,10 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0308]: mismatched types
+ --> src/main.rs:7:38
+  |
+7 |     let wont_work = Point { x: 5, y: 4.0 };
+  |                                      ^^^ expected integer, found floating-point number
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/src/main.rs
new file mode 100644
index 000000000..7883db1a6
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-07/src/main.rs
@@ -0,0 +1,8 @@
+struct Point<T> {
+    x: T,
+    y: T,
+}
+
+fn main() {
+    let wont_work = Point { x: 5, y: 4.0 };
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/src/main.rs
new file mode 100644
index 000000000..615b78cfd
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-08/src/main.rs
@@ -0,0 +1,10 @@
+struct Point<T, U> {
+    x: T,
+    y: U,
+}
+
+fn main() {
+    let both_integer = Point { x: 5, y: 10 };
+    let both_float = Point { x: 1.0, y: 4.0 };
+    let integer_and_float = Point { x: 5, y: 4.0 };
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/src/main.rs
new file mode 100644
index 000000000..288b64eac
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-09/src/main.rs
@@ -0,0 +1,16 @@
+struct Point<T> {
+    x: T,
+    y: T,
+}
+
+impl<T> Point<T> {
+    fn x(&self) -> &T {
+        &self.x
+    }
+}
+
+fn main() {
+    let p = Point { x: 5, y: 10 };
+
+    println!("p.x = {}", p.x());
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/src/main.rs
new file mode 100644
index 000000000..4c5b01bdc
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-10/src/main.rs
@@ -0,0 +1,24 @@
+struct Point<T> {
+    x: T,
+    y: T,
+}
+
+impl<T> Point<T> {
+    fn x(&self) -> &T {
+        &self.x
+    }
+}
+
+// ANCHOR: here
+impl Point<f32> {
+    fn distance_from_origin(&self) -> f32 {
+        (self.x.powi(2) + self.y.powi(2)).sqrt()
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let p = Point { x: 5, y: 10 };
+
+    println!("p.x = {}", p.x());
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/src/main.rs
new file mode 100644
index 000000000..86b028108
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-11/src/main.rs
@@ -0,0 +1,22 @@
+struct Point<X1, Y1> {
+    x: X1,
+    y: Y1,
+}
+
+impl<X1, Y1> Point<X1, Y1> {
+    fn mixup<X2, Y2>(self, other: Point<X2, Y2>) -> Point<X1, Y2> {
+        Point {
+            x: self.x,
+            y: other.y,
+        }
+    }
+}
+
+fn main() {
+    let p1 = Point { x: 5, y: 10.4 };
+    let p2 = Point { x: "Hello", y: 'c' };
+
+    let p3 = p1.mixup(p2);
+
+    println!("p3.x = {}, p3.y = {}", p3.x, p3.y);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/src/lib.rs
new file mode 100644
index 000000000..cfaedb02f
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-12/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/src/lib.rs
new file mode 100644
index 000000000..c4c83329e
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-13/src/lib.rs
@@ -0,0 +1,31 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+
+// ANCHOR: here
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/src/lib.rs
new file mode 100644
index 000000000..fb59b84fb
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-14/src/lib.rs
@@ -0,0 +1,29 @@
+// ANCHOR: here
+pub trait Summary {
+    fn summarize(&self) -> String {
+        String::from("(Read more...)")
+    }
+}
+// ANCHOR_END: here
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/lib.rs
new file mode 100644
index 000000000..669cc5fdc
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-15/src/lib.rs
@@ -0,0 +1,22 @@
+use std::fmt::Display;
+
+struct Pair<T> {
+    x: T,
+    y: T,
+}
+
+impl<T> Pair<T> {
+    fn new(x: T, y: T) -> Self {
+        Self { x, y }
+    }
+}
+
+impl<T: Display + PartialOrd> Pair<T> {
+    fn cmp_display(&self) {
+        if self.x >= self.y {
+            println!("The largest member is x = {}", self.x);
+        } else {
+            println!("The largest member is y = {}", self.y);
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt
new file mode 100644
index 000000000..b63bf83a1
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/output.txt
@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0597]: `x` does not live long enough
+ --> src/main.rs:6:13
+  |
+6 |         r = &x;
+  |             ^^ borrowed value does not live long enough
+7 |     }
+  |     - `x` dropped here while still borrowed
+8 | 
+9 |     println!("r: {}", r);
+  |                       - borrow later used here
+
+For more information about this error, try `rustc --explain E0597`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs
new file mode 100644
index 000000000..d71134ea0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-16/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let r;
+
+    {
+        let x = 5;
+        r = &x;
+    }
+
+    println!("r: {}", r);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.lock
new file mode 100644
index 000000000..6388bb2b5
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/rustfmt-ignore b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs
new file mode 100644
index 000000000..e8ca92328
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-17/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let r;                // ---------+-- 'a
+                          //          |
+    {                     //          |
+        let x = 5;        // -+-- 'b  |
+        r = &x;           //  |       |
+    }                     // -+       |
+                          //          |
+    println!("r: {}", r); //          |
+}                         // ---------+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.lock
new file mode 100644
index 000000000..6388bb2b5
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/rustfmt-ignore b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/rustfmt-ignore
new file mode 100644
index 000000000..9a53c718a
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/rustfmt-ignore
@@ -0,0 +1,3 @@
+We have some weird comments pointing out borrowing scopes that we don't want to change;
+unfortunately I haven't found a way to skip them with rustfmt that works so for now we're going to
+manually skip those listings. See: https://github.com/rust-lang/rustfmt/issues/4028
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs
new file mode 100644
index 000000000..09ae3919c
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-18/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    let x = 5;            // ----------+-- 'b
+                          //           |
+    let r = &x;           // --+-- 'a  |
+                          //   |       |
+    println!("r: {}", r); //   |       |
+                          // --+       |
+}                         // ----------+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs
new file mode 100644
index 000000000..0f076a71d
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-19/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "xyz";
+
+    let result = longest(string1.as_str(), string2);
+    println!("The longest string is {}", result);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt
new file mode 100644
index 000000000..534a984a6
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0106]: missing lifetime specifier
+ --> src/main.rs:9:33
+  |
+9 | fn longest(x: &str, y: &str) -> &str {
+  |               ----     ----     ^ expected named lifetime parameter
+  |
+  = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `x` or `y`
+help: consider introducing a named lifetime parameter
+  |
+9 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
+  |           ++++     ++          ++          ++
+
+For more information about this error, try `rustc --explain E0106`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs
new file mode 100644
index 000000000..6af8c9f0d
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-20/src/main.rs
@@ -0,0 +1,17 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "xyz";
+
+    let result = longest(string1.as_str(), string2);
+    println!("The longest string is {}", result);
+}
+
+// ANCHOR: here
+fn longest(x: &str, y: &str) -> &str {
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs
new file mode 100644
index 000000000..09c3a0daa
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-21/src/main.rs
@@ -0,0 +1,17 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "xyz";
+
+    let result = longest(string1.as_str(), string2);
+    println!("The longest string is {}", result);
+}
+
+// ANCHOR: here
+fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs
new file mode 100644
index 000000000..836ec7295
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-22/src/main.rs
@@ -0,0 +1,19 @@
+// ANCHOR: here
+fn main() {
+    let string1 = String::from("long string is long");
+
+    {
+        let string2 = String::from("xyz");
+        let result = longest(string1.as_str(), string2.as_str());
+        println!("The longest string is {}", result);
+    }
+}
+// ANCHOR_END: here
+
+fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt
new file mode 100644
index 000000000..7f31ce02c
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/output.txt
@@ -0,0 +1,14 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0597]: `string2` does not live long enough
+ --> src/main.rs:6:44
+  |
+6 |         result = longest(string1.as_str(), string2.as_str());
+  |                                            ^^^^^^^^^^^^^^^^ borrowed value does not live long enough
+7 |     }
+  |     - `string2` dropped here while still borrowed
+8 |     println!("The longest string is {}", result);
+  |                                          ------ borrow later used here
+
+For more information about this error, try `rustc --explain E0597`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs
new file mode 100644
index 000000000..2a6fa5898
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-23/src/main.rs
@@ -0,0 +1,19 @@
+// ANCHOR: here
+fn main() {
+    let string1 = String::from("long string is long");
+    let result;
+    {
+        let string2 = String::from("xyz");
+        result = longest(string1.as_str(), string2.as_str());
+    }
+    println!("The longest string is {}", result);
+}
+// ANCHOR_END: here
+
+fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs
new file mode 100644
index 000000000..2937b194c
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/src/main.rs
@@ -0,0 +1,11 @@
+struct ImportantExcerpt<'a> {
+    part: &'a str,
+}
+
+fn main() {
+    let novel = String::from("Call me Ishmael. Some years ago...");
+    let first_sentence = novel.split('.').next().expect("Could not find a '.'");
+    let i = ImportantExcerpt {
+        part: first_sentence,
+    };
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.lock
new file mode 100644
index 000000000..2aa4918e5
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ownership"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.toml
new file mode 100644
index 000000000..e8847526d
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ownership"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/src/main.rs
new file mode 100644
index 000000000..431a261d2
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-25/src/main.rs
@@ -0,0 +1,29 @@
+// ANCHOR: here
+fn first_word(s: &str) -> &str {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return &s[0..i];
+        }
+    }
+
+    &s[..]
+}
+// ANCHOR_END: here
+
+fn main() {
+    let my_string = String::from("hello world");
+
+    // first_word works on slices of `String`s
+    let word = first_word(&my_string[..]);
+
+    let my_string_literal = "hello world";
+
+    // first_word works on slices of string literals
+    let word = first_word(&my_string_literal[..]);
+
+    // Because string literals *are* string slices already,
+    // this works too, without the slice syntax!
+    let word = first_word(my_string_literal);
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/lib.rs
new file mode 100644
index 000000000..fa644ca4f
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/lib.rs
@@ -0,0 +1,29 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/main.rs
new file mode 100644
index 000000000..0b51121d9
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-01-calling-trait-method/src/main.rs
@@ -0,0 +1,14 @@
+use aggregator::{Summary, Tweet};
+
+fn main() {
+    let tweet = Tweet {
+        username: String::from("horse_ebooks"),
+        content: String::from(
+            "of course, as you probably already know, people",
+        ),
+        reply: false,
+        retweet: false,
+    };
+
+    println!("1 new tweet: {}", tweet.summarize());
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/lib.rs
new file mode 100644
index 000000000..b6f93a68f
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/lib.rs
@@ -0,0 +1,27 @@
+pub trait Summary {
+    fn summarize(&self) -> String {
+        String::from("(Read more...)")
+    }
+}
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/main.rs
new file mode 100644
index 000000000..cc9b98e31
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-02-calling-default-impl/src/main.rs
@@ -0,0 +1,17 @@
+use aggregator::{self, NewsArticle, Summary};
+
+fn main() {
+    // ANCHOR: here
+    let article = NewsArticle {
+        headline: String::from("Penguins win the Stanley Cup Championship!"),
+        location: String::from("Pittsburgh, PA, USA"),
+        author: String::from("Iceburgh"),
+        content: String::from(
+            "The Pittsburgh Penguins once again are the best \
+             hockey team in the NHL.",
+        ),
+    };
+
+    println!("New article available! {}", article.summarize());
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/lib.rs
new file mode 100644
index 000000000..643906f69
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/lib.rs
@@ -0,0 +1,24 @@
+// ANCHOR: here
+pub trait Summary {
+    fn summarize_author(&self) -> String;
+
+    fn summarize(&self) -> String {
+        format!("(Read more from {}...)", self.summarize_author())
+    }
+}
+// ANCHOR_END: here
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+// ANCHOR: impl
+impl Summary for Tweet {
+    fn summarize_author(&self) -> String {
+        format!("@{}", self.username)
+    }
+}
+// ANCHOR_END: impl
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/main.rs
new file mode 100644
index 000000000..e05e8e1c6
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-03-default-impl-calls-other-methods/src/main.rs
@@ -0,0 +1,16 @@
+use aggregator::{self, Summary, Tweet};
+
+fn main() {
+    // ANCHOR: here
+    let tweet = Tweet {
+        username: String::from("horse_ebooks"),
+        content: String::from(
+            "of course, as you probably already know, people",
+        ),
+        reply: false,
+        retweet: false,
+    };
+
+    println!("1 new tweet: {}", tweet.summarize());
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/src/lib.rs
new file mode 100644
index 000000000..261994351
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-04-traits-as-parameters/src/lib.rs
@@ -0,0 +1,35 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
+
+// ANCHOR: here
+pub fn notify(item: &impl Summary) {
+    println!("Breaking news! {}", item.summarize());
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/src/lib.rs
new file mode 100644
index 000000000..a611fce38
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-05-returning-impl-trait/src/lib.rs
@@ -0,0 +1,42 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
+
+// ANCHOR: here
+fn returns_summarizable() -> impl Summary {
+    Tweet {
+        username: String::from("horse_ebooks"),
+        content: String::from(
+            "of course, as you probably already know, people",
+        ),
+        reply: false,
+        retweet: false,
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.lock
new file mode 100644
index 000000000..2835471f0
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aggregator"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.toml
new file mode 100644
index 000000000..46f46a7f4
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/src/lib.rs
new file mode 100644
index 000000000..7cd81d4c3
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-06-impl-trait-returns-one-type/src/lib.rs
@@ -0,0 +1,56 @@
+pub trait Summary {
+    fn summarize(&self) -> String;
+}
+
+pub struct NewsArticle {
+    pub headline: String,
+    pub location: String,
+    pub author: String,
+    pub content: String,
+}
+
+impl Summary for NewsArticle {
+    fn summarize(&self) -> String {
+        format!("{}, by {} ({})", self.headline, self.author, self.location)
+    }
+}
+
+pub struct Tweet {
+    pub username: String,
+    pub content: String,
+    pub reply: bool,
+    pub retweet: bool,
+}
+
+impl Summary for Tweet {
+    fn summarize(&self) -> String {
+        format!("{}: {}", self.username, self.content)
+    }
+}
+
+// ANCHOR: here
+fn returns_summarizable(switch: bool) -> impl Summary {
+    if switch {
+        NewsArticle {
+            headline: String::from(
+                "Penguins win the Stanley Cup Championship!",
+            ),
+            location: String::from("Pittsburgh, PA, USA"),
+            author: String::from("Iceburgh"),
+            content: String::from(
+                "The Pittsburgh Penguins once again are the best \
+                 hockey team in the NHL.",
+            ),
+        }
+    } else {
+        Tweet {
+            username: String::from("horse_ebooks"),
+            content: String::from(
+                "of course, as you probably already know, people",
+            ),
+            reply: false,
+            retweet: false,
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/Cargo.toml
new file mode 100644
index 000000000..4dbde9090
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/src/lib.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/src/lib.rs
new file mode 100644
index 000000000..05b07c31a
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-07-where-clause/src/lib.rs
@@ -0,0 +1,9 @@
+// ANCHOR: here
+fn some_function<T, U>(t: &T, u: &U) -> i32
+where
+    T: Display + Clone,
+    U: Clone + Debug,
+{
+    // ANCHOR_END: here
+    unimplemented!()
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs
new file mode 100644
index 000000000..d144305cb
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-08-only-one-reference-with-lifetime/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "efghijklmnopqrstuvwxyz";
+
+    let result = longest(string1.as_str(), string2);
+    println!("The longest string is {}", result);
+}
+
+// ANCHOR: here
+fn longest<'a>(x: &'a str, y: &str) -> &'a str {
+    x
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt
new file mode 100644
index 000000000..0c628b697
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt
@@ -0,0 +1,10 @@
+$ cargo run
+   Compiling chapter10 v0.1.0 (file:///projects/chapter10)
+error[E0515]: cannot return reference to local variable `result`
+  --> src/main.rs:11:5
+   |
+11 |     result.as_str()
+   |     ^^^^^^^^^^^^^^^ returns a reference to data owned by the current function
+
+For more information about this error, try `rustc --explain E0515`.
+error: could not compile `chapter10` due to previous error
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs
new file mode 100644
index 000000000..aca4be0a7
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "xyz";
+
+    let result = longest(string1.as_str(), string2);
+    println!("The longest string is {}", result);
+}
+
+// ANCHOR: here
+fn longest<'a>(x: &str, y: &str) -> &'a str {
+    let result = String::from("really long string");
+    result.as_str()
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs
new file mode 100644
index 000000000..32ad530b5
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-10-lifetimes-on-methods/src/main.rs
@@ -0,0 +1,28 @@
+struct ImportantExcerpt<'a> {
+    part: &'a str,
+}
+
+// ANCHOR: 1st
+impl<'a> ImportantExcerpt<'a> {
+    fn level(&self) -> i32 {
+        3
+    }
+}
+// ANCHOR_END: 1st
+
+// ANCHOR: 3rd
+impl<'a> ImportantExcerpt<'a> {
+    fn announce_and_return_part(&self, announcement: &str) -> &str {
+        println!("Attention please: {}", announcement);
+        self.part
+    }
+}
+// ANCHOR_END: 3rd
+
+fn main() {
+    let novel = String::from("Call me Ishmael. Some years ago...");
+    let first_sentence = novel.split('.').next().expect("Could not find a '.'");
+    let i = ImportantExcerpt {
+        part: first_sentence,
+    };
+}
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock
new file mode 100644
index 000000000..e8007a19b
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "chapter10"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml
new file mode 100644
index 000000000..489f80967
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "chapter10"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs
new file mode 100644
index 000000000..cfafa9a6d
--- /dev/null
+++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs
@@ -0,0 +1,31 @@
+fn main() {
+    let string1 = String::from("abcd");
+    let string2 = "xyz";
+
+    let result = longest_with_an_announcement(
+        string1.as_str(),
+        string2,
+        "Today is someone's birthday!",
+    );
+    println!("The longest string is {}", result);
+}
+
+// ANCHOR: here
+use std::fmt::Display;
+
+fn longest_with_an_announcement<'a, T>(
+    x: &'a str,
+    y: &'a str,
+    ann: T,
+) -> &'a str
+where
+    T: Display,
+{
+    println!("Announcement! {}", ann);
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/output.txt
new file mode 100644
index 000000000..c3e812ed8
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/output.txt
@@ -0,0 +1,16 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.57s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::it_works ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs
new file mode 100644
index 000000000..1b4a90c93
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-01/src/lib.rs
@@ -0,0 +1,8 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result = 2 + 2;
+        assert_eq!(result, 4);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/output.txt
new file mode 100644
index 000000000..0c2fd0327
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/output.txt
@@ -0,0 +1,22 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.72s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 2 tests
+test tests::another ... FAILED
+test tests::exploration ... ok
+
+failures:
+
+---- tests::another stdout ----
+thread 'main' panicked at 'Make this test fail', src/lib.rs:10:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::another
+
+test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs
new file mode 100644
index 000000000..a9ec00891
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-03/src/lib.rs
@@ -0,0 +1,14 @@
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn exploration() {
+        assert_eq!(2 + 2, 4);
+    }
+
+    #[test]
+    fn another() {
+        panic!("Make this test fail");
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.lock
new file mode 100644
index 000000000..9dcd5439d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangle"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.toml
new file mode 100644
index 000000000..2447c67f5
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangle"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/src/lib.rs
new file mode 100644
index 000000000..0f1bc4e08
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-05/src/lib.rs
@@ -0,0 +1,13 @@
+// ANCHOR: here
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.lock
new file mode 100644
index 000000000..9dcd5439d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangle"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.toml
new file mode 100644
index 000000000..2447c67f5
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangle"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/output.txt
new file mode 100644
index 000000000..dad02b460
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/output.txt
@@ -0,0 +1,16 @@
+$ cargo test
+   Compiling rectangle v0.1.0 (file:///projects/rectangle)
+    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+     Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
+
+running 1 test
+test tests::larger_can_hold_smaller ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests rectangle
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/src/lib.rs
new file mode 100644
index 000000000..6ad1512ed
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-06/src/lib.rs
@@ -0,0 +1,32 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn larger_can_hold_smaller() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(larger.can_hold(&smaller));
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/output.txt
new file mode 100644
index 000000000..fa02835bd
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/output.txt
@@ -0,0 +1,16 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::it_adds_two ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs
new file mode 100644
index 000000000..3e5d66bfa
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-07/src/lib.rs
@@ -0,0 +1,13 @@
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_adds_two() {
+        assert_eq!(4, add_two(2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.toml
new file mode 100644
index 000000000..4e348c8d2
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/output.txt
new file mode 100644
index 000000000..caca1542f
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/output.txt
@@ -0,0 +1,16 @@
+$ cargo test
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+     Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
+
+running 1 test
+test tests::greater_than_100 - should panic ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests guessing_game
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs
new file mode 100644
index 000000000..9391be5b1
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-08/src/lib.rs
@@ -0,0 +1,24 @@
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 || value > 100 {
+            panic!("Guess value must be between 1 and 100, got {}.", value);
+        }
+
+        Guess { value }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[should_panic]
+    fn greater_than_100() {
+        Guess::new(200);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.toml
new file mode 100644
index 000000000..4e348c8d2
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs
new file mode 100644
index 000000000..cc1c5c35d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-09/src/lib.rs
@@ -0,0 +1,36 @@
+pub struct Guess {
+    value: i32,
+}
+
+// ANCHOR: here
+// --snip--
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 {
+            panic!(
+                "Guess value must be greater than or equal to 1, got {}.",
+                value
+            );
+        } else if value > 100 {
+            panic!(
+                "Guess value must be less than or equal to 100, got {}.",
+                value
+            );
+        }
+
+        Guess { value }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[should_panic(expected = "less than or equal to 100")]
+    fn greater_than_100() {
+        Guess::new(200);
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.lock
new file mode 100644
index 000000000..a6d35e395
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "silly-function"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.toml
new file mode 100644
index 000000000..f751864de
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "silly-function"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/output.txt
new file mode 100644
index 000000000..0512cd59f
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/output.txt
@@ -0,0 +1,25 @@
+$ cargo test
+   Compiling silly-function v0.1.0 (file:///projects/silly-function)
+    Finished test [unoptimized + debuginfo] target(s) in 0.58s
+     Running unittests src/lib.rs (target/debug/deps/silly_function-160869f38cff9166)
+
+running 2 tests
+test tests::this_test_will_fail ... FAILED
+test tests::this_test_will_pass ... ok
+
+failures:
+
+---- tests::this_test_will_fail stdout ----
+I got the value 8
+thread 'main' panicked at 'assertion failed: `(left == right)`
+  left: `5`,
+ right: `10`', src/lib.rs:19:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::this_test_will_fail
+
+test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs
new file mode 100644
index 000000000..6fd76ce00
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-10/src/lib.rs
@@ -0,0 +1,21 @@
+fn prints_and_returns_10(a: i32) -> i32 {
+    println!("I got the value {}", a);
+    10
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn this_test_will_pass() {
+        let value = prints_and_returns_10(4);
+        assert_eq!(10, value);
+    }
+
+    #[test]
+    fn this_test_will_fail() {
+        let value = prints_and_returns_10(8);
+        assert_eq!(5, value);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/output.txt
new file mode 100644
index 000000000..fe19c83c4
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/output.txt
@@ -0,0 +1,18 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.62s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 3 tests
+test tests::add_three_and_two ... ok
+test tests::add_two_and_two ... ok
+test tests::one_hundred ... ok
+
+test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs
new file mode 100644
index 000000000..f56715263
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs
@@ -0,0 +1,23 @@
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn add_two_and_two() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[test]
+    fn add_three_and_two() {
+        assert_eq!(5, add_two(3));
+    }
+
+    #[test]
+    fn one_hundred() {
+        assert_eq!(102, add_two(100));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs
new file mode 100644
index 000000000..c3961b1f6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-12/src/lib.rs
@@ -0,0 +1,17 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/output.txt
new file mode 100644
index 000000000..22970e9e1
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/output.txt
@@ -0,0 +1,23 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 1.31s
+     Running unittests src/lib.rs (target/debug/deps/adder-1082c4b063a8fbe6)
+
+running 1 test
+test tests::internal ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+     Running tests/integration_test.rs (target/debug/deps/integration_test-1082c4b063a8fbe6)
+
+running 1 test
+test it_adds_two ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs
new file mode 100644
index 000000000..c3961b1f6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/src/lib.rs
@@ -0,0 +1,17 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs
new file mode 100644
index 000000000..e26fa7109
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/listing-11-13/tests/integration_test.rs
@@ -0,0 +1,6 @@
+use adder;
+
+#[test]
+fn it_adds_two() {
+    assert_eq!(4, adder::add_two(2));
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt
new file mode 100644
index 000000000..8a3330844
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/output.txt
@@ -0,0 +1,16 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.59s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::exploration ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs
new file mode 100644
index 000000000..330bddf6a
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-01-changing-test-name/src/lib.rs
@@ -0,0 +1,7 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn exploration() {
+        assert_eq!(2 + 2, 4);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.lock
new file mode 100644
index 000000000..9dcd5439d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangle"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.toml
new file mode 100644
index 000000000..2447c67f5
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangle"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt
new file mode 100644
index 000000000..30e45e525
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/output.txt
@@ -0,0 +1,17 @@
+$ cargo test
+   Compiling rectangle v0.1.0 (file:///projects/rectangle)
+    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+     Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
+
+running 2 tests
+test tests::larger_can_hold_smaller ... ok
+test tests::smaller_cannot_hold_larger ... ok
+
+test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests rectangle
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/src/lib.rs
new file mode 100644
index 000000000..ee4fc45b9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-02-adding-another-rectangle-test/src/lib.rs
@@ -0,0 +1,49 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn larger_can_hold_smaller() {
+        // --snip--
+        // ANCHOR_END: here
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(larger.can_hold(&smaller));
+        // ANCHOR: here
+    }
+
+    #[test]
+    fn smaller_cannot_hold_larger() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(!smaller.can_hold(&larger));
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.lock
new file mode 100644
index 000000000..9dcd5439d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rectangle"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.toml
new file mode 100644
index 000000000..2447c67f5
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangle"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt
new file mode 100644
index 000000000..fdeb597e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/output.txt
@@ -0,0 +1,22 @@
+$ cargo test
+   Compiling rectangle v0.1.0 (file:///projects/rectangle)
+    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+     Running unittests src/lib.rs (target/debug/deps/rectangle-6584c4561e48942e)
+
+running 2 tests
+test tests::larger_can_hold_smaller ... FAILED
+test tests::smaller_cannot_hold_larger ... ok
+
+failures:
+
+---- tests::larger_can_hold_smaller stdout ----
+thread 'main' panicked at 'assertion failed: larger.can_hold(&smaller)', src/lib.rs:28:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::larger_can_hold_smaller
+
+test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/src/lib.rs
new file mode 100644
index 000000000..f5968fcaf
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-03-introducing-a-bug/src/lib.rs
@@ -0,0 +1,47 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+// ANCHOR: here
+// --snip--
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width < other.width && self.height > other.height
+    }
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn larger_can_hold_smaller() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(larger.can_hold(&smaller));
+    }
+
+    #[test]
+    fn smaller_cannot_hold_larger() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(!smaller.can_hold(&larger));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt
new file mode 100644
index 000000000..0af0401e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/output.txt
@@ -0,0 +1,23 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::it_adds_two ... FAILED
+
+failures:
+
+---- tests::it_adds_two stdout ----
+thread 'main' panicked at 'assertion failed: `(left == right)`
+  left: `4`,
+ right: `5`', src/lib.rs:11:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::it_adds_two
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs
new file mode 100644
index 000000000..f18662526
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-04-bug-in-add-two/src/lib.rs
@@ -0,0 +1,15 @@
+// ANCHOR: here
+pub fn add_two(a: i32) -> i32 {
+    a + 3
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_adds_two() {
+        assert_eq!(4, add_two(2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.lock
new file mode 100644
index 000000000..9a7ecdd9f
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greeter"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.toml
new file mode 100644
index 000000000..90a826cf4
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "greeter"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs
new file mode 100644
index 000000000..3ba3d8819
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-05-greeter/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn greeting(name: &str) -> String {
+    format!("Hello {}!", name)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn greeting_contains_name() {
+        let result = greeting("Carol");
+        assert!(result.contains("Carol"));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.lock
new file mode 100644
index 000000000..9a7ecdd9f
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greeter"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.toml
new file mode 100644
index 000000000..90a826cf4
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "greeter"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt
new file mode 100644
index 000000000..3049543a7
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/output.txt
@@ -0,0 +1,21 @@
+$ cargo test
+   Compiling greeter v0.1.0 (file:///projects/greeter)
+    Finished test [unoptimized + debuginfo] target(s) in 0.91s
+     Running unittests src/lib.rs (target/debug/deps/greeter-170b942eb5bf5e3a)
+
+running 1 test
+test tests::greeting_contains_name ... FAILED
+
+failures:
+
+---- tests::greeting_contains_name stdout ----
+thread 'main' panicked at 'assertion failed: result.contains(\"Carol\")', src/lib.rs:12:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::greeting_contains_name
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/src/lib.rs
new file mode 100644
index 000000000..6f28fc52a
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-06-greeter-with-bug/src/lib.rs
@@ -0,0 +1,16 @@
+// ANCHOR: here
+pub fn greeting(name: &str) -> String {
+    String::from("Hello!")
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn greeting_contains_name() {
+        let result = greeting("Carol");
+        assert!(result.contains("Carol"));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.lock
new file mode 100644
index 000000000..9a7ecdd9f
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "greeter"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.toml
new file mode 100644
index 000000000..90a826cf4
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "greeter"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt
new file mode 100644
index 000000000..d2ba1961b
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/output.txt
@@ -0,0 +1,21 @@
+$ cargo test
+   Compiling greeter v0.1.0 (file:///projects/greeter)
+    Finished test [unoptimized + debuginfo] target(s) in 0.93s
+     Running unittests src/lib.rs (target/debug/deps/greeter-170b942eb5bf5e3a)
+
+running 1 test
+test tests::greeting_contains_name ... FAILED
+
+failures:
+
+---- tests::greeting_contains_name stdout ----
+thread 'main' panicked at 'Greeting did not contain name, value was `Hello!`', src/lib.rs:12:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::greeting_contains_name
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs
new file mode 100644
index 000000000..519c7a4c6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-07-custom-failure-message/src/lib.rs
@@ -0,0 +1,20 @@
+pub fn greeting(name: &str) -> String {
+    String::from("Hello!")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // ANCHOR: here
+    #[test]
+    fn greeting_contains_name() {
+        let result = greeting("Carol");
+        assert!(
+            result.contains("Carol"),
+            "Greeting did not contain name, value was `{}`",
+            result
+        );
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.toml
new file mode 100644
index 000000000..4e348c8d2
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt
new file mode 100644
index 000000000..f59dddec4
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/output.txt
@@ -0,0 +1,19 @@
+$ cargo test
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+    Finished test [unoptimized + debuginfo] target(s) in 0.62s
+     Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
+
+running 1 test
+test tests::greater_than_100 - should panic ... FAILED
+
+failures:
+
+---- tests::greater_than_100 stdout ----
+note: test did not panic as expected
+
+failures:
+    tests::greater_than_100
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs
new file mode 100644
index 000000000..32540ba83
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-08-guess-with-bug/src/lib.rs
@@ -0,0 +1,27 @@
+pub struct Guess {
+    value: i32,
+}
+
+// ANCHOR: here
+// --snip--
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        if value < 1 {
+            panic!("Guess value must be between 1 and 100, got {}.", value);
+        }
+
+        Guess { value }
+    }
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[should_panic]
+    fn greater_than_100() {
+        Guess::new(200);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.lock
new file mode 100644
index 000000000..5802b7dc9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "guessing_game"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.toml
new file mode 100644
index 000000000..4e348c8d2
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt
new file mode 100644
index 000000000..c8cba98fe
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/output.txt
@@ -0,0 +1,23 @@
+$ cargo test
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+    Finished test [unoptimized + debuginfo] target(s) in 0.66s
+     Running unittests src/lib.rs (target/debug/deps/guessing_game-57d70c3acb738f4d)
+
+running 1 test
+test tests::greater_than_100 - should panic ... FAILED
+
+failures:
+
+---- tests::greater_than_100 stdout ----
+thread 'main' panicked at 'Guess value must be greater than or equal to 1, got 200.', src/lib.rs:13:13
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+note: panic did not contain expected string
+      panic message: `"Guess value must be greater than or equal to 1, got 200."`,
+ expected substring: `"less than or equal to 100"`
+
+failures:
+    tests::greater_than_100
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs
new file mode 100644
index 000000000..7703dd75a
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-09-guess-with-panic-msg-bug/src/lib.rs
@@ -0,0 +1,34 @@
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        // ANCHOR: here
+        if value < 1 {
+            panic!(
+                "Guess value must be less than or equal to 100, got {}.",
+                value
+            );
+        } else if value > 100 {
+            panic!(
+                "Guess value must be greater than or equal to 1, got {}.",
+                value
+            );
+        }
+        // ANCHOR_END: here
+
+        Guess { value }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[should_panic(expected = "less than or equal to 100")]
+    fn greater_than_100() {
+        Guess::new(200);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs
new file mode 100644
index 000000000..6284f4f29
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-10-result-in-tests/src/lib.rs
@@ -0,0 +1,11 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() -> Result<(), String> {
+        if 2 + 2 == 4 {
+            Ok(())
+        } else {
+            Err(String::from("two plus two does not equal four"))
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt
new file mode 100644
index 000000000..c559de8d0
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/output.txt
@@ -0,0 +1,17 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.60s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 2 tests
+test expensive_test ... ignored
+test it_works ... ok
+
+test result: ok. 1 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs
new file mode 100644
index 000000000..d54a6095d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-11-ignore-a-test/src/lib.rs
@@ -0,0 +1,10 @@
+#[test]
+fn it_works() {
+    assert_eq!(2 + 2, 4);
+}
+
+#[test]
+#[ignore]
+fn expensive_test() {
+    // code that takes an hour to run
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt
new file mode 100644
index 000000000..324d566ab
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/output.txt
@@ -0,0 +1,29 @@
+$ cargo test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.89s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::internal ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+     Running tests/common.rs (target/debug/deps/common-92948b65e88960b4)
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+     Running tests/integration_test.rs (target/debug/deps/integration_test-92948b65e88960b4)
+
+running 1 test
+test it_adds_two ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs
new file mode 100644
index 000000000..c3961b1f6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/src/lib.rs
@@ -0,0 +1,17 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/common.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/common.rs
new file mode 100644
index 000000000..5fb7a390a
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/common.rs
@@ -0,0 +1,3 @@
+pub fn setup() {
+    // setup code specific to your library's tests would go here
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs
new file mode 100644
index 000000000..e26fa7109
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-12-shared-test-code-problem/tests/integration_test.rs
@@ -0,0 +1,6 @@
+use adder;
+
+#[test]
+fn it_adds_two() {
+    assert_eq!(4, adder::add_two(2));
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs
new file mode 100644
index 000000000..c3961b1f6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/src/lib.rs
@@ -0,0 +1,17 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/common/mod.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/common/mod.rs
new file mode 100644
index 000000000..5fb7a390a
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/common/mod.rs
@@ -0,0 +1,3 @@
+pub fn setup() {
+    // setup code specific to your library's tests would go here
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs
new file mode 100644
index 000000000..58b8b7b89
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/no-listing-13-fix-shared-test-code-problem/tests/integration_test.rs
@@ -0,0 +1,9 @@
+use adder;
+
+mod common;
+
+#[test]
+fn it_adds_two() {
+    common::setup();
+    assert_eq!(4, adder::add_two(2));
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.lock
new file mode 100644
index 000000000..a6d35e395
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "silly-function"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.toml
new file mode 100644
index 000000000..f751864de
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "silly-function"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt
new file mode 100644
index 000000000..8caaeda06
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/output.txt
@@ -0,0 +1,34 @@
+$ cargo test -- --show-output
+   Compiling silly-function v0.1.0 (file:///projects/silly-function)
+    Finished test [unoptimized + debuginfo] target(s) in 0.60s
+     Running unittests src/lib.rs (target/debug/deps/silly_function-160869f38cff9166)
+
+running 2 tests
+test tests::this_test_will_fail ... FAILED
+test tests::this_test_will_pass ... ok
+
+successes:
+
+---- tests::this_test_will_pass stdout ----
+I got the value 4
+
+
+successes:
+    tests::this_test_will_pass
+
+failures:
+
+---- tests::this_test_will_fail stdout ----
+I got the value 8
+thread 'main' panicked at 'assertion failed: `(left == right)`
+  left: `5`,
+ right: `10`', src/lib.rs:19:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::this_test_will_fail
+
+test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs
new file mode 100644
index 000000000..43c4c92f9
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-01-show-output/src/lib.rs
@@ -0,0 +1,21 @@
+pub fn prints_and_returns_10(a: i32) -> i32 {
+    println!("I got the value {}", a);
+    10
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn this_test_will_pass() {
+        let value = prints_and_returns_10(4);
+        assert_eq!(10, value);
+    }
+
+    #[test]
+    fn this_test_will_fail() {
+        let value = prints_and_returns_10(8);
+        assert_eq!(5, value);
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt
new file mode 100644
index 000000000..f2da98442
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/output.txt
@@ -0,0 +1,10 @@
+$ cargo test one_hundred
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.69s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test tests::one_hundred ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/src/lib.rs
new file mode 100644
index 000000000..f56715263
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-02-single-test/src/lib.rs
@@ -0,0 +1,23 @@
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn add_two_and_two() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[test]
+    fn add_three_and_two() {
+        assert_eq!(5, add_two(3));
+    }
+
+    #[test]
+    fn one_hundred() {
+        assert_eq!(102, add_two(100));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt
new file mode 100644
index 000000000..255a051b5
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/output.txt
@@ -0,0 +1,11 @@
+$ cargo test add
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 2 tests
+test tests::add_three_and_two ... ok
+test tests::add_two_and_two ... ok
+
+test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 1 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/src/lib.rs
new file mode 100644
index 000000000..f56715263
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-03-multiple-tests/src/lib.rs
@@ -0,0 +1,23 @@
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn add_two_and_two() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[test]
+    fn add_three_and_two() {
+        assert_eq!(5, add_two(3));
+    }
+
+    #[test]
+    fn one_hundred() {
+        assert_eq!(102, add_two(100));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt
new file mode 100644
index 000000000..b37868d3d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/output.txt
@@ -0,0 +1,16 @@
+$ cargo test -- --ignored
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.61s
+     Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
+
+running 1 test
+test expensive_test ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 1 filtered out; finished in 0.00s
+
+   Doc-tests adder
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/src/lib.rs
new file mode 100644
index 000000000..2290c699d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-04-running-ignored/src/lib.rs
@@ -0,0 +1,12 @@
+// ANCHOR: here
+#[test]
+fn it_works() {
+    assert_eq!(2 + 2, 4);
+}
+
+#[test]
+#[ignore]
+fn expensive_test() {
+    // code that takes an hour to run
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.lock b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.toml b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt
new file mode 100644
index 000000000..260beaa2d
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/output.txt
@@ -0,0 +1,10 @@
+$ cargo test --test integration_test
+   Compiling adder v0.1.0 (file:///projects/adder)
+    Finished test [unoptimized + debuginfo] target(s) in 0.64s
+     Running tests/integration_test.rs (target/debug/deps/integration_test-82e7799c1bc62298)
+
+running 1 test
+test it_adds_two ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs
new file mode 100644
index 000000000..c3961b1f6
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/src/lib.rs
@@ -0,0 +1,17 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}
diff --git a/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs
new file mode 100644
index 000000000..e26fa7109
--- /dev/null
+++ b/src/doc/book/listings/ch11-writing-automated-tests/output-only-05-single-integration/tests/integration_test.rs
@@ -0,0 +1,6 @@
+use adder;
+
+#[test]
+fn it_adds_two() {
+    assert_eq!(4, adder::add_two(2));
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-01/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-01/output.txt
new file mode 100644
index 000000000..529115f8d
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-01/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.61s
+     Running `target/debug/minigrep`
+[src/main.rs:5] args = [
+    "target/debug/minigrep",
+]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-01/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-01/src/main.rs
new file mode 100644
index 000000000..ae7def53d
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-01/src/main.rs
@@ -0,0 +1,6 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    dbg!(args);
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-02/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-02/output.txt
new file mode 100644
index 000000000..6ef87f7ce
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-02/output.txt
@@ -0,0 +1,6 @@
+$ cargo run -- test sample.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep test sample.txt`
+Searching for test
+In file sample.txt
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-02/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-02/src/main.rs
new file mode 100644
index 000000000..ae2fa7bb1
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-02/src/main.rs
@@ -0,0 +1,11 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let query = &args[1];
+    let file_path = &args[2];
+
+    println!("Searching for {}", query);
+    println!("In file {}", file_path);
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-03/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-03/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-03/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-03/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-03/src/main.rs
new file mode 100644
index 000000000..ae2fa7bb1
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-03/src/main.rs
@@ -0,0 +1,11 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let query = &args[1];
+    let file_path = &args[2];
+
+    println!("Searching for {}", query);
+    println!("In file {}", file_path);
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-04/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-04/output.txt
new file mode 100644
index 000000000..6582ca169
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-04/output.txt
@@ -0,0 +1,17 @@
+$ cargo run -- the poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep the poem.txt`
+Searching for the
+In file poem.txt
+With text:
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-04/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-04/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-04/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-04/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-04/src/main.rs
new file mode 100644
index 000000000..944e4300e
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-04/src/main.rs
@@ -0,0 +1,22 @@
+// ANCHOR: here
+use std::env;
+use std::fs;
+
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+    let args: Vec<String> = env::args().collect();
+
+    let query = &args[1];
+    let file_path = &args[2];
+
+    println!("Searching for {}", query);
+    // ANCHOR: here
+    println!("In file {}", file_path);
+
+    let contents = fs::read_to_string(file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-05/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-05/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-05/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-05/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-05/src/main.rs
new file mode 100644
index 000000000..061591833
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-05/src/main.rs
@@ -0,0 +1,29 @@
+use std::env;
+use std::fs;
+
+// ANCHOR: here
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let (query, file_path) = parse_config(&args);
+
+    // --snip--
+    // ANCHOR_END: here
+
+    println!("Searching for {}", query);
+    println!("In file {}", file_path);
+
+    let contents = fs::read_to_string(file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+    // ANCHOR: here
+}
+
+fn parse_config(args: &[String]) -> (&str, &str) {
+    let query = &args[1];
+    let file_path = &args[2];
+
+    (query, file_path)
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-06/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-06/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-06/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-06/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-06/src/main.rs
new file mode 100644
index 000000000..c77e848d8
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-06/src/main.rs
@@ -0,0 +1,34 @@
+use std::env;
+use std::fs;
+
+// ANCHOR: here
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = parse_config(&args);
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    // --snip--
+    // ANCHOR_END: here
+
+    println!("With text:\n{contents}");
+    // ANCHOR: here
+}
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+fn parse_config(args: &[String]) -> Config {
+    let query = args[1].clone();
+    let file_path = args[2].clone();
+
+    Config { query, file_path }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-07/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-07/output.txt
new file mode 100644
index 000000000..d3fa7777d
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-07/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep`
+thread 'main' panicked at 'index out of bounds: the len is 1 but the index is 1', src/main.rs:27:21
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-07/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-07/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-07/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-07/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-07/src/main.rs
new file mode 100644
index 000000000..ff6c29420
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-07/src/main.rs
@@ -0,0 +1,40 @@
+use std::env;
+use std::fs;
+
+// ANCHOR: here
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::new(&args);
+    // ANCHOR_END: here
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+    // ANCHOR: here
+
+    // --snip--
+}
+
+// --snip--
+
+// ANCHOR_END: here
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+// ANCHOR: here
+impl Config {
+    fn new(args: &[String]) -> Config {
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Config { query, file_path }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-08/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-08/output.txt
new file mode 100644
index 000000000..de2abd1af
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-08/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep`
+thread 'main' panicked at 'not enough arguments', src/main.rs:26:13
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-08/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-08/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-08/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-08/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-08/src/main.rs
new file mode 100644
index 000000000..cecd15abf
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-08/src/main.rs
@@ -0,0 +1,38 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::new(&args);
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+}
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+impl Config {
+    // ANCHOR: here
+    // --snip--
+    fn new(args: &[String]) -> Config {
+        if args.len() < 3 {
+            panic!("not enough arguments");
+        }
+        // --snip--
+        // ANCHOR_END: here
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Config { query, file_path }
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-09/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-09/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-09/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-09/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-09/src/main.rs
new file mode 100644
index 000000000..3418e718c
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-09/src/main.rs
@@ -0,0 +1,36 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::new(&args);
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+}
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+// ANCHOR: here
+impl Config {
+    fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-10/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-10/output.txt
new file mode 100644
index 000000000..7aad57f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-10/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+     Running `target/debug/minigrep`
+Problem parsing arguments: not enough arguments
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-10/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-10/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-10/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-10/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-10/src/main.rs
new file mode 100644
index 000000000..ab6d3e548
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-10/src/main.rs
@@ -0,0 +1,42 @@
+use std::env;
+use std::fs;
+// ANCHOR: here
+use std::process;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    // --snip--
+    // ANCHOR_END: here
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+}
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+impl Config {
+    fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-11/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-11/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-11/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-11/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-11/src/main.rs
new file mode 100644
index 000000000..3f476b975
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-11/src/main.rs
@@ -0,0 +1,50 @@
+use std::env;
+use std::fs;
+use std::process;
+
+// ANCHOR: here
+fn main() {
+    // --snip--
+
+    // ANCHOR_END: here
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    // ANCHOR: here
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    run(config);
+}
+
+fn run(config: Config) {
+    let contents = fs::read_to_string(config.file_path)
+        .expect("Should have been able to read the file");
+
+    println!("With text:\n{contents}");
+}
+
+// --snip--
+// ANCHOR_END: here
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+impl Config {
+    fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-12/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-12/output.txt
new file mode 100644
index 000000000..c18902518
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-12/output.txt
@@ -0,0 +1,27 @@
+$ cargo run the poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+warning: unused `Result` that must be used
+  --> src/main.rs:19:5
+   |
+19 |     run(config);
+   |     ^^^^^^^^^^^^
+   |
+   = note: `#[warn(unused_must_use)]` on by default
+   = note: this `Result` may be an `Err` variant, which should be handled
+
+warning: `minigrep` (bin "minigrep") generated 1 warning
+    Finished dev [unoptimized + debuginfo] target(s) in 0.71s
+     Running `target/debug/minigrep the poem.txt`
+Searching for the
+In file poem.txt
+With text:
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-12/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-12/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-12/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-12/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-12/src/main.rs
new file mode 100644
index 000000000..ab5fdb894
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-12/src/main.rs
@@ -0,0 +1,51 @@
+use std::env;
+use std::fs;
+use std::process;
+// ANCHOR: here
+use std::error::Error;
+
+// --snip--
+
+// ANCHOR_END: here
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    run(config);
+}
+
+// ANCHOR: here
+fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    println!("With text:\n{contents}");
+
+    Ok(())
+}
+// ANCHOR_END: here
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+impl Config {
+    fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-13/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-13/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-13/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/lib.rs
new file mode 100644
index 000000000..1a3c48089
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/lib.rs
@@ -0,0 +1,36 @@
+// ANCHOR: here
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        // --snip--
+        // ANCHOR_END: here
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+        // ANCHOR: here
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    // --snip--
+    // ANCHOR_END: here
+    let contents = fs::read_to_string(config.file_path)?;
+
+    println!("With text:\n{contents}");
+
+    Ok(())
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/main.rs
new file mode 100644
index 000000000..09756ca3f
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-13/src/main.rs
@@ -0,0 +1,19 @@
+use std::env;
+use std::process;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    if let Err(e) = run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-14/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-14/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-14/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/lib.rs
new file mode 100644
index 000000000..4f3a4e865
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/lib.rs
@@ -0,0 +1,28 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    println!("With text:\n{contents}");
+
+    Ok(())
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/main.rs
new file mode 100644
index 000000000..3b76009b5
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-14/src/main.rs
@@ -0,0 +1,29 @@
+// ANCHOR: here
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    // ANCHOR: here
+    if let Err(e) = minigrep::run(config) {
+        // --snip--
+        // ANCHOR_END: here
+        println!("Application error: {e}");
+        process::exit(1);
+        // ANCHOR: here
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-15/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-15/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-15/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/lib.rs
new file mode 100644
index 000000000..20c4a782b
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/lib.rs
@@ -0,0 +1,44 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-15/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-16/output.txt
new file mode 100644
index 000000000..d0cda6024
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/output.txt
@@ -0,0 +1,23 @@
+$ cargo test
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished test [unoptimized + debuginfo] target(s) in 0.97s
+     Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
+
+running 1 test
+test tests::one_result ... FAILED
+
+failures:
+
+---- tests::one_result stdout ----
+thread 'main' panicked at 'assertion failed: `(left == right)`
+  left: `["safe, fast, productive."]`,
+ right: `[]`', src/lib.rs:44:9
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::one_result
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-16/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/lib.rs
new file mode 100644
index 000000000..f5e593484
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/lib.rs
@@ -0,0 +1,48 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    vec![]
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-16/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-17/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-17/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-17/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/lib.rs
new file mode 100644
index 000000000..cb9fab401
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/lib.rs
@@ -0,0 +1,50 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    for line in contents.lines() {
+        // do something with line
+    }
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-17/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-18/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-18/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-18/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/lib.rs
new file mode 100644
index 000000000..a05d046d7
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/lib.rs
@@ -0,0 +1,52 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    for line in contents.lines() {
+        if line.contains(query) {
+            // do something with line
+        }
+    }
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-18/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-19/output.txt
new file mode 100644
index 000000000..9b2078cb8
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/output.txt
@@ -0,0 +1,22 @@
+$ cargo test
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished test [unoptimized + debuginfo] target(s) in 1.22s
+     Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
+
+running 1 test
+test tests::one_result ... ok
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+     Running unittests src/main.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests minigrep
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-19/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/lib.rs
new file mode 100644
index 000000000..f5d3ffa9f
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/lib.rs
@@ -0,0 +1,58 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+// ANCHOR: ch13
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+// ANCHOR_END: ch13
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-19/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-20/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-20/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-20/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/lib.rs
new file mode 100644
index 000000000..a757f7f55
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/lib.rs
@@ -0,0 +1,76 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    for line in search(&config.query, &contents) {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-20/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-21/output.txt
new file mode 100644
index 000000000..dafeb7862
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/output.txt
@@ -0,0 +1,23 @@
+$ cargo test
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished test [unoptimized + debuginfo] target(s) in 1.33s
+     Running unittests src/lib.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
+
+running 2 tests
+test tests::case_insensitive ... ok
+test tests::case_sensitive ... ok
+
+test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+     Running unittests src/main.rs (target/debug/deps/minigrep-9cd200e5fac0fc94)
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests minigrep
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-21/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/lib.rs
new file mode 100644
index 000000000..3aaa04082
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/lib.rs
@@ -0,0 +1,92 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    for line in search(&config.query, &contents) {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+// ANCHOR: here
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-21/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-22/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-22/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-22/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/lib.rs
new file mode 100644
index 000000000..c3f4723f1
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/lib.rs
@@ -0,0 +1,101 @@
+use std::error::Error;
+use std::fs;
+
+// ANCHOR: here
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+// ANCHOR_END: here
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+// ANCHOR: there
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+// ANCHOR_END: there
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-22/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/output.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-23/output.txt
new file mode 100644
index 000000000..eaffc2f24
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/output.txt
@@ -0,0 +1,6 @@
+$ cargo run -- to poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep to poem.txt`
+Are you nobody, too?
+How dreary to be somebody!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-23/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/lib.rs
new file mode 100644
index 000000000..20eda2197
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/lib.rs
@@ -0,0 +1,110 @@
+// ANCHOR: here
+use std::env;
+// --snip--
+
+// ANCHOR_END: here
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+// ANCHOR: here
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+// ANCHOR_END: here
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-23/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-24/poem.txt b/src/doc/book/listings/ch12-an-io-project/listing-12-24/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-24/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/lib.rs
new file mode 100644
index 000000000..292b09789
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/lib.rs
@@ -0,0 +1,104 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/main.rs b/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/main.rs
new file mode 100644
index 000000000..1278a6c17
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/listing-12-24/src/main.rs
@@ -0,0 +1,20 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+// ANCHOR: here
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/poem.txt b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/src/main.rs b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/src/main.rs
new file mode 100644
index 000000000..e51319efe
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-01-handling-errors-in-main/src/main.rs
@@ -0,0 +1,53 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+use std::process;
+
+// ANCHOR: here
+fn main() {
+    // --snip--
+
+    // ANCHOR_END: here
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    // ANCHOR: here
+    println!("Searching for {}", config.query);
+    println!("In file {}", config.file_path);
+
+    if let Err(e) = run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
+// ANCHOR_END: here
+
+fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    println!("With text:\n{contents}");
+
+    Ok(())
+}
+
+struct Config {
+    query: String,
+    file_path: String,
+}
+
+impl Config {
+    fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt
new file mode 100644
index 000000000..a5a4ef8c2
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/output.txt
@@ -0,0 +1,5 @@
+$ cargo run -- frog poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.38s
+     Running `target/debug/minigrep frog poem.txt`
+How public, like a frog
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/poem.txt b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/lib.rs
new file mode 100644
index 000000000..e06eae4cd
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/lib.rs
@@ -0,0 +1,60 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+// ANCHOR: here
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    for line in search(&config.query, &contents) {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+// ANCHOR_END: here
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/main.rs b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/no-listing-02-using-search-in-run/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/output.txt b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/output.txt
new file mode 100644
index 000000000..b48bb0e10
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/output.txt
@@ -0,0 +1,9 @@
+$ cargo run -- needle haystack
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 1.57s
+     Running `target/debug/minigrep needle haystack`
+[src/main.rs:5] args = [
+    "target/debug/minigrep",
+    "needle",
+    "haystack",
+]
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/src/main.rs b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/src/main.rs
new file mode 100644
index 000000000..ae7def53d
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-01-with-args/src/main.rs
@@ -0,0 +1,6 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    dbg!(args);
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt
new file mode 100644
index 000000000..93116dd5e
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt
@@ -0,0 +1,16 @@
+$ cargo build
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+error[E0106]: missing lifetime specifier
+  --> src/lib.rs:28:51
+   |
+28 | pub fn search(query: &str, contents: &str) -> Vec<&str> {
+   |                      ----            ----         ^ expected named lifetime parameter
+   |
+   = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `query` or `contents`
+help: consider introducing a named lifetime parameter
+   |
+28 | pub fn search<'a>(query: &'a str, contents: &'a str) -> Vec<&'a str> {
+   |              ++++         ++                 ++              ++
+
+For more information about this error, try `rustc --explain E0106`.
+error: could not compile `minigrep` due to previous error
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs
new file mode 100644
index 000000000..df623bdea
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs
@@ -0,0 +1,48 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    Ok(())
+}
+
+// ANCHOR: here
+pub fn search(query: &str, contents: &str) -> Vec<&str> {
+    vec![]
+}
+// ANCHOR_END: here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt
new file mode 100644
index 000000000..b46835766
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/output.txt
@@ -0,0 +1,7 @@
+$ cargo run -- body poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep body poem.txt`
+I'm nobody! Who are you?
+Are you nobody, too?
+How dreary to be somebody!
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/poem.txt b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/lib.rs
new file mode 100644
index 000000000..e06eae4cd
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/lib.rs
@@ -0,0 +1,60 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+// ANCHOR: here
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    for line in search(&config.query, &contents) {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+// ANCHOR_END: here
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/main.rs b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-03-multiple-matches/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/output.txt b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/output.txt
new file mode 100644
index 000000000..a53624f83
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/output.txt
@@ -0,0 +1,4 @@
+$ cargo run -- monomorphization poem.txt
+   Compiling minigrep v0.1.0 (file:///projects/minigrep)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.0s
+     Running `target/debug/minigrep monomorphization poem.txt`
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/poem.txt b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/lib.rs
new file mode 100644
index 000000000..e06eae4cd
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/lib.rs
@@ -0,0 +1,60 @@
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        Ok(Config { query, file_path })
+    }
+}
+
+// ANCHOR: here
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    for line in search(&config.query, &contents) {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+// ANCHOR_END: here
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn one_result() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+}
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/main.rs b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch12-an-io-project/output-only-04-no-matches/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/lib.rs
new file mode 100644
index 000000000..e54343d24
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/lib.rs
@@ -0,0 +1,106 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+// ANCHOR: ch13
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+// ANCHOR_END: ch13
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/main.rs
new file mode 100644
index 000000000..a4f8a7411
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-23-reproduced/src/main.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        println!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        println!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/lib.rs
new file mode 100644
index 000000000..292b09789
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/lib.rs
@@ -0,0 +1,104 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/main.rs
new file mode 100644
index 000000000..f9d179c8c
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-12-24-reproduced/src/main.rs
@@ -0,0 +1,24 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+// ANCHOR: ch13
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let config = Config::build(&args).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    // --snip--
+    // ANCHOR_END: ch13
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+    // ANCHOR: ch13
+}
+// ANCHOR_END: ch13
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.lock
new file mode 100644
index 000000000..6f974d1ba
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "shirt-company"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.toml
new file mode 100644
index 000000000..1eb392dfa
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shirt-company"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-01/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-01/output.txt
new file mode 100644
index 000000000..b64a4d8dc
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-01/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling shirt-company v0.1.0 (file:///projects/shirt-company)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.27s
+     Running `target/debug/shirt-company`
+The user with preference Some(Red) gets Red
+The user with preference None gets Blue
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-01/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-01/src/main.rs
new file mode 100644
index 000000000..2c87d6965
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-01/src/main.rs
@@ -0,0 +1,52 @@
+#[derive(Debug, PartialEq, Copy, Clone)]
+enum ShirtColor {
+    Red,
+    Blue,
+}
+
+struct Inventory {
+    shirts: Vec<ShirtColor>,
+}
+
+impl Inventory {
+    fn giveaway(&self, user_preference: Option<ShirtColor>) -> ShirtColor {
+        user_preference.unwrap_or_else(|| self.most_stocked())
+    }
+
+    fn most_stocked(&self) -> ShirtColor {
+        let mut num_red = 0;
+        let mut num_blue = 0;
+
+        for color in &self.shirts {
+            match color {
+                ShirtColor::Red => num_red += 1,
+                ShirtColor::Blue => num_blue += 1,
+            }
+        }
+        if num_red > num_blue {
+            ShirtColor::Red
+        } else {
+            ShirtColor::Blue
+        }
+    }
+}
+
+fn main() {
+    let store = Inventory {
+        shirts: vec![ShirtColor::Blue, ShirtColor::Red, ShirtColor::Blue],
+    };
+
+    let user_pref1 = Some(ShirtColor::Red);
+    let giveaway1 = store.giveaway(user_pref1);
+    println!(
+        "The user with preference {:?} gets {:?}",
+        user_pref1, giveaway1
+    );
+
+    let user_pref2 = None;
+    let giveaway2 = store.giveaway(user_pref2);
+    println!(
+        "The user with preference {:?} gets {:?}",
+        user_pref2, giveaway2
+    );
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.lock
new file mode 100644
index 000000000..75ff09e51
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "workout-app"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.toml
new file mode 100644
index 000000000..f09a737d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "workout-app"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-02/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-02/src/main.rs
new file mode 100644
index 000000000..b3f4cc2c2
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-02/src/main.rs
@@ -0,0 +1,33 @@
+use std::thread;
+use std::time::Duration;
+
+fn generate_workout(intensity: u32, random_number: u32) {
+    // ANCHOR: here
+    let expensive_closure = |num: u32| -> u32 {
+        println!("calculating slowly...");
+        thread::sleep(Duration::from_secs(2));
+        num
+    };
+    // ANCHOR_END: here
+
+    if intensity < 25 {
+        println!("Today, do {} pushups!", expensive_closure(intensity));
+        println!("Next, do {} situps!", expensive_closure(intensity));
+    } else {
+        if random_number == 3 {
+            println!("Take a break today! Remember to stay hydrated!");
+        } else {
+            println!(
+                "Today, run for {} minutes!",
+                expensive_closure(intensity)
+            );
+        }
+    }
+}
+
+fn main() {
+    let simulated_user_specified_value = 10;
+    let simulated_random_number = 7;
+
+    generate_workout(simulated_user_specified_value, simulated_random_number);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.lock
new file mode 100644
index 000000000..c190d3a41
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "closure-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.toml
new file mode 100644
index 000000000..914c4cfaa
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "closure-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-03/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-03/output.txt
new file mode 100644
index 000000000..37d83618a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-03/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling closure-example v0.1.0 (file:///projects/closure-example)
+error[E0308]: mismatched types
+ --> src/main.rs:5:29
+  |
+5 |     let n = example_closure(5);
+  |                             ^- help: try using a conversion method: `.to_string()`
+  |                             |
+  |                             expected struct `String`, found integer
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `closure-example` due to previous error
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-03/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-03/src/main.rs
new file mode 100644
index 000000000..ebb2489bf
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-03/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let example_closure = |x| x;
+
+    let s = example_closure(String::from("hello"));
+    let n = example_closure(5);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.lock
new file mode 100644
index 000000000..75ff09e51
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "workout-app"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.toml
new file mode 100644
index 000000000..914c4cfaa
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "closure-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-04/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-04/output.txt
new file mode 100644
index 000000000..64d763b51
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-04/output.txt
@@ -0,0 +1,8 @@
+$ cargo run
+   Compiling closure-example v0.1.0 (file:///projects/closure-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+     Running `target/debug/closure-example`
+Before defining closure: [1, 2, 3]
+Before calling closure: [1, 2, 3]
+From closure: [1, 2, 3]
+After calling closure: [1, 2, 3]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-04/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-04/src/main.rs
new file mode 100644
index 000000000..43b91bb30
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-04/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let list = vec![1, 2, 3];
+    println!("Before defining closure: {:?}", list);
+
+    let only_borrows = || println!("From closure: {:?}", list);
+
+    println!("Before calling closure: {:?}", list);
+    only_borrows();
+    println!("After calling closure: {:?}", list);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.lock
new file mode 100644
index 000000000..75ff09e51
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "workout-app"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.toml
new file mode 100644
index 000000000..914c4cfaa
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "closure-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-05/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-05/output.txt
new file mode 100644
index 000000000..ce0ad5e37
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-05/output.txt
@@ -0,0 +1,6 @@
+$ cargo run
+   Compiling closure-example v0.1.0 (file:///projects/closure-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.43s
+     Running `target/debug/closure-example`
+Before defining closure: [1, 2, 3]
+After calling closure: [1, 2, 3, 7]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-05/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-05/src/main.rs
new file mode 100644
index 000000000..37f8130e2
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-05/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let mut list = vec![1, 2, 3];
+    println!("Before defining closure: {:?}", list);
+
+    let mut borrows_mutably = || list.push(7);
+
+    borrows_mutably();
+    println!("After calling closure: {:?}", list);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-06/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-06/Cargo.toml
new file mode 100644
index 000000000..8085ade0f
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-06/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "closure-example"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-06/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-06/src/main.rs
new file mode 100644
index 000000000..2c8e18c9f
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-06/src/main.rs
@@ -0,0 +1,10 @@
+use std::thread;
+
+fn main() {
+    let list = vec![1, 2, 3];
+    println!("Before defining closure: {:?}", list);
+
+    thread::spawn(move || println!("From thread: {:?}", list))
+        .join()
+        .unwrap();
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-07/.rustfmt.toml b/src/doc/book/listings/ch13-functional-features/listing-13-07/.rustfmt.toml
new file mode 100644
index 000000000..ee10c634b
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-07/.rustfmt.toml
@@ -0,0 +1,2 @@
+struct_lit_width = 50
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-07/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-07/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-07/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-07/output.txt
new file mode 100644
index 000000000..f18fce46e
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-07/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.41s
+     Running `target/debug/rectangles`
+[
+    Rectangle {
+        width: 3,
+        height: 5,
+    },
+    Rectangle {
+        width: 7,
+        height: 12,
+    },
+    Rectangle {
+        width: 10,
+        height: 1,
+    },
+]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-07/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-07/src/main.rs
new file mode 100644
index 000000000..73a25e5f9
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-07/src/main.rs
@@ -0,0 +1,16 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let mut list = [
+        Rectangle { width: 10, height: 1 },
+        Rectangle { width: 3, height: 5 },
+        Rectangle { width: 7, height: 12 },
+    ];
+
+    list.sort_by_key(|r| r.width);
+    println!("{:#?}", list);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-08/.rustfmt.toml b/src/doc/book/listings/ch13-functional-features/listing-13-08/.rustfmt.toml
new file mode 100644
index 000000000..ee10c634b
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-08/.rustfmt.toml
@@ -0,0 +1,2 @@
+struct_lit_width = 50
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-08/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-08/Cargo.toml
new file mode 100644
index 000000000..703c9d977
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-08/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-08/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-08/output.txt
new file mode 100644
index 000000000..7a39ac618
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-08/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling rectangles v0.1.0 (file:///projects/rectangles)
+error[E0507]: cannot move out of `value`, a captured variable in an `FnMut` closure
+  --> src/main.rs:18:30
+   |
+15 |       let value = String::from("by key called");
+   |           ----- captured outer variable
+16 | 
+17 |       list.sort_by_key(|r| {
+   |  ______________________-
+18 | |         sort_operations.push(value);
+   | |                              ^^^^^ move occurs because `value` has type `String`, which does not implement the `Copy` trait
+19 | |         r.width
+20 | |     });
+   | |_____- captured by this `FnMut` closure
+
+For more information about this error, try `rustc --explain E0507`.
+error: could not compile `rectangles` due to previous error
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-08/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-08/src/main.rs
new file mode 100644
index 000000000..3b9c9cbdf
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-08/src/main.rs
@@ -0,0 +1,22 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let mut list = [
+        Rectangle { width: 10, height: 1 },
+        Rectangle { width: 3, height: 5 },
+        Rectangle { width: 7, height: 12 },
+    ];
+
+    let mut sort_operations = vec![];
+    let value = String::from("by key called");
+
+    list.sort_by_key(|r| {
+        sort_operations.push(value);
+        r.width
+    });
+    println!("{:#?}", list);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-09/.rustfmt.toml b/src/doc/book/listings/ch13-functional-features/listing-13-09/.rustfmt.toml
new file mode 100644
index 000000000..ee10c634b
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-09/.rustfmt.toml
@@ -0,0 +1,2 @@
+struct_lit_width = 50
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.lock
new file mode 100644
index 000000000..e090432bc
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cacher"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.toml
new file mode 100644
index 000000000..4a279a450
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-09/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-09/src/main.rs
new file mode 100644
index 000000000..a60d6fd3f
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-09/src/main.rs
@@ -0,0 +1,20 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn main() {
+    let mut list = [
+        Rectangle { width: 10, height: 1 },
+        Rectangle { width: 3, height: 5 },
+        Rectangle { width: 7, height: 12 },
+    ];
+
+    let mut num_sort_operations = 0;
+    list.sort_by_key(|r| {
+        num_sort_operations += 1;
+        r.width
+    });
+    println!("{:#?}, sorted in {num_sort_operations} operations", list);
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-10/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-10/src/main.rs
new file mode 100644
index 000000000..55a0dd37e
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-10/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    let v1 = vec![1, 2, 3];
+
+    let v1_iter = v1.iter();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-11/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-11/src/main.rs
new file mode 100644
index 000000000..712aff408
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-11/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let v1 = vec![1, 2, 3];
+
+    let v1_iter = v1.iter();
+
+    for val in v1_iter {
+        println!("Got: {}", val);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-12/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-12/src/lib.rs
new file mode 100644
index 000000000..758284044
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-12/src/lib.rs
@@ -0,0 +1,16 @@
+#[cfg(test)]
+mod tests {
+    // ANCHOR: here
+    #[test]
+    fn iterator_demonstration() {
+        let v1 = vec![1, 2, 3];
+
+        let mut v1_iter = v1.iter();
+
+        assert_eq!(v1_iter.next(), Some(&1));
+        assert_eq!(v1_iter.next(), Some(&2));
+        assert_eq!(v1_iter.next(), Some(&3));
+        assert_eq!(v1_iter.next(), None);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-13/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-13/src/lib.rs
new file mode 100644
index 000000000..d1cb54d0a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-13/src/lib.rs
@@ -0,0 +1,15 @@
+#[cfg(test)]
+mod tests {
+    // ANCHOR: here
+    #[test]
+    fn iterator_sum() {
+        let v1 = vec![1, 2, 3];
+
+        let v1_iter = v1.iter();
+
+        let total: i32 = v1_iter.sum();
+
+        assert_eq!(total, 6);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-14/output.txt b/src/doc/book/listings/ch13-functional-features/listing-13-14/output.txt
new file mode 100644
index 000000000..228c764ed
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-14/output.txt
@@ -0,0 +1,14 @@
+$ cargo run
+   Compiling iterators v0.1.0 (file:///projects/iterators)
+warning: unused `Map` that must be used
+ --> src/main.rs:4:5
+  |
+4 |     v1.iter().map(|x| x + 1);
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^
+  |
+  = note: `#[warn(unused_must_use)]` on by default
+  = note: iterators are lazy and do nothing unless consumed
+
+warning: `iterators` (bin "iterators") generated 1 warning
+    Finished dev [unoptimized + debuginfo] target(s) in 0.47s
+     Running `target/debug/iterators`
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-14/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-14/src/main.rs
new file mode 100644
index 000000000..62a68be9b
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-14/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    let v1: Vec<i32> = vec![1, 2, 3];
+
+    v1.iter().map(|x| x + 1);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.lock
new file mode 100644
index 000000000..e91eaa8d4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "iterators"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.toml
new file mode 100644
index 000000000..2652a8a1a
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "iterators"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-15/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-15/src/main.rs
new file mode 100644
index 000000000..db9025d6f
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-15/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let v1: Vec<i32> = vec![1, 2, 3];
+
+    let v2: Vec<_> = v1.iter().map(|x| x + 1).collect();
+
+    assert_eq!(v2, vec![2, 3, 4]);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock
new file mode 100644
index 000000000..0b15e2157
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shoe_size"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml
new file mode 100644
index 000000000..cc803776b
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shoe_size"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs
new file mode 100644
index 000000000..281c3c9e4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-16/src/lib.rs
@@ -0,0 +1,48 @@
+#[derive(PartialEq, Debug)]
+struct Shoe {
+    size: u32,
+    style: String,
+}
+
+fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
+    shoes.into_iter().filter(|s| s.size == shoe_size).collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn filters_by_size() {
+        let shoes = vec![
+            Shoe {
+                size: 10,
+                style: String::from("sneaker"),
+            },
+            Shoe {
+                size: 13,
+                style: String::from("sandal"),
+            },
+            Shoe {
+                size: 10,
+                style: String::from("boot"),
+            },
+        ];
+
+        let in_my_size = shoes_in_size(shoes, 10);
+
+        assert_eq!(
+            in_my_size,
+            vec![
+                Shoe {
+                    size: 10,
+                    style: String::from("sneaker")
+                },
+                Shoe {
+                    size: 10,
+                    style: String::from("boot")
+                },
+            ]
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-18/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-13-18/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-18/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-18/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-18/src/lib.rs
new file mode 100644
index 000000000..292b09789
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-18/src/lib.rs
@@ -0,0 +1,104 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+impl Config {
+    pub fn build(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-18/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-18/src/main.rs
new file mode 100644
index 000000000..40109ef63
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-18/src/main.rs
@@ -0,0 +1,22 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+// ANCHOR: here
+fn main() {
+    let config = Config::build(env::args()).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    // --snip--
+    // ANCHOR_END: here
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-19/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-13-19/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-19/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-19/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-19/src/lib.rs
new file mode 100644
index 000000000..79ae2b8f6
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-19/src/lib.rs
@@ -0,0 +1,109 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+// ANCHOR: here
+impl Config {
+    pub fn build(
+        mut args: impl Iterator<Item = String>,
+    ) -> Result<Config, &'static str> {
+        // --snip--
+        // ANCHOR_END: here
+        if args.len() < 3 {
+            return Err("not enough arguments");
+        }
+
+        let query = args[1].clone();
+        let file_path = args[2].clone();
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-19/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-19/src/main.rs
new file mode 100644
index 000000000..9ac022545
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-19/src/main.rs
@@ -0,0 +1,16 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let config = Config::build(env::args()).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-20/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-13-20/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-20/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-20/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-20/src/lib.rs
new file mode 100644
index 000000000..4410964a7
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-20/src/lib.rs
@@ -0,0 +1,113 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+// ANCHOR: here
+impl Config {
+    pub fn build(
+        mut args: impl Iterator<Item = String>,
+    ) -> Result<Config, &'static str> {
+        args.next();
+
+        let query = match args.next() {
+            Some(arg) => arg,
+            None => return Err("Didn't get a query string"),
+        };
+
+        let file_path = match args.next() {
+            Some(arg) => arg,
+            None => return Err("Didn't get a file path"),
+        };
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+// ANCHOR_END: here
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.contains(query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-20/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-20/src/main.rs
new file mode 100644
index 000000000..9ac022545
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-20/src/main.rs
@@ -0,0 +1,16 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let config = Config::build(env::args()).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.lock b/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.lock
new file mode 100644
index 000000000..88bf82d16
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "minigrep"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.toml b/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.toml
new file mode 100644
index 000000000..64c2a3f52
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "minigrep"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-22/poem.txt b/src/doc/book/listings/ch13-functional-features/listing-13-22/poem.txt
new file mode 100644
index 000000000..870752731
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-22/poem.txt
@@ -0,0 +1,9 @@
+I'm nobody! Who are you?
+Are you nobody, too?
+Then there's a pair of us - don't tell!
+They'd banish us, you know.
+
+How dreary to be somebody!
+How public, like a frog
+To tell your name the livelong day
+To an admiring bog!
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-22/src/lib.rs b/src/doc/book/listings/ch13-functional-features/listing-13-22/src/lib.rs
new file mode 100644
index 000000000..d694669b4
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-22/src/lib.rs
@@ -0,0 +1,108 @@
+use std::env;
+use std::error::Error;
+use std::fs;
+
+pub struct Config {
+    pub query: String,
+    pub file_path: String,
+    pub ignore_case: bool,
+}
+
+impl Config {
+    pub fn build(
+        mut args: impl Iterator<Item = String>,
+    ) -> Result<Config, &'static str> {
+        args.next();
+
+        let query = match args.next() {
+            Some(arg) => arg,
+            None => return Err("Didn't get a query string"),
+        };
+
+        let file_path = match args.next() {
+            Some(arg) => arg,
+            None => return Err("Didn't get a file path"),
+        };
+
+        let ignore_case = env::var("IGNORE_CASE").is_ok();
+
+        Ok(Config {
+            query,
+            file_path,
+            ignore_case,
+        })
+    }
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+
+    let results = if config.ignore_case {
+        search_case_insensitive(&config.query, &contents)
+    } else {
+        search(&config.query, &contents)
+    };
+
+    for line in results {
+        println!("{line}");
+    }
+
+    Ok(())
+}
+
+// ANCHOR: here
+pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
+    contents
+        .lines()
+        .filter(|line| line.contains(query))
+        .collect()
+}
+// ANCHOR_END: here
+
+pub fn search_case_insensitive<'a>(
+    query: &str,
+    contents: &'a str,
+) -> Vec<&'a str> {
+    let query = query.to_lowercase();
+    let mut results = Vec::new();
+
+    for line in contents.lines() {
+        if line.to_lowercase().contains(&query) {
+            results.push(line);
+        }
+    }
+
+    results
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn case_sensitive() {
+        let query = "duct";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Duct tape.";
+
+        assert_eq!(vec!["safe, fast, productive."], search(query, contents));
+    }
+
+    #[test]
+    fn case_insensitive() {
+        let query = "rUsT";
+        let contents = "\
+Rust:
+safe, fast, productive.
+Pick three.
+Trust me.";
+
+        assert_eq!(
+            vec!["Rust:", "Trust me."],
+            search_case_insensitive(query, contents)
+        );
+    }
+}
diff --git a/src/doc/book/listings/ch13-functional-features/listing-13-22/src/main.rs b/src/doc/book/listings/ch13-functional-features/listing-13-22/src/main.rs
new file mode 100644
index 000000000..9ac022545
--- /dev/null
+++ b/src/doc/book/listings/ch13-functional-features/listing-13-22/src/main.rs
@@ -0,0 +1,16 @@
+use std::env;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let config = Config::build(env::args()).unwrap_or_else(|err| {
+        eprintln!("Problem parsing arguments: {err}");
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Application error: {e}");
+        process::exit(1);
+    }
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.lock
new file mode 100644
index 000000000..b304dd7c7
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "my_crate"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.toml
new file mode 100644
index 000000000..c52da0412
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "my_crate"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/src/lib.rs
new file mode 100644
index 000000000..ed7abb727
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-01/src/lib.rs
@@ -0,0 +1,13 @@
+/// Adds one to the number given.
+///
+/// # Examples
+///
+/// ```
+/// let arg = 5;
+/// let answer = my_crate::add_one(arg);
+///
+/// assert_eq!(6, answer);
+/// ```
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.lock
new file mode 100644
index 000000000..b304dd7c7
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "my_crate"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.toml
new file mode 100644
index 000000000..c52da0412
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "my_crate"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/src/lib.rs
new file mode 100644
index 000000000..64c9c439c
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-02/src/lib.rs
@@ -0,0 +1,21 @@
+// ANCHOR: here
+//! # My Crate
+//!
+//! `my_crate` is a collection of utilities to make performing certain
+//! calculations more convenient.
+
+/// Adds one to the number given.
+// --snip--
+// ANCHOR_END: here
+///
+/// # Examples
+///
+/// ```
+/// let arg = 5;
+/// let answer = my_crate::add_one(arg);
+///
+/// assert_eq!(6, answer);
+/// ```
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.lock
new file mode 100644
index 000000000..df19c247b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "art"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.toml
new file mode 100644
index 000000000..66ef4b532
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "art"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/src/lib.rs
new file mode 100644
index 000000000..bffbe058d
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-03/src/lib.rs
@@ -0,0 +1,34 @@
+// ANCHOR: here
+//! # Art
+//!
+//! A library for modeling artistic concepts.
+
+pub mod kinds {
+    /// The primary colors according to the RYB color model.
+    pub enum PrimaryColor {
+        Red,
+        Yellow,
+        Blue,
+    }
+
+    /// The secondary colors according to the RYB color model.
+    pub enum SecondaryColor {
+        Orange,
+        Green,
+        Purple,
+    }
+}
+
+pub mod utils {
+    use crate::kinds::*;
+
+    /// Combines two primary colors in equal amounts to create
+    /// a secondary color.
+    pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
+        // --snip--
+        // ANCHOR_END: here
+        unimplemented!();
+        // ANCHOR: here
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.lock
new file mode 100644
index 000000000..df19c247b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "art"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.toml
new file mode 100644
index 000000000..66ef4b532
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "art"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/lib.rs
new file mode 100644
index 000000000..b077a9a71
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/lib.rs
@@ -0,0 +1,29 @@
+//! # Art
+//!
+//! A library for modeling artistic concepts.
+
+pub mod kinds {
+    /// The primary colors according to the RYB color model.
+    pub enum PrimaryColor {
+        Red,
+        Yellow,
+        Blue,
+    }
+
+    /// The secondary colors according to the RYB color model.
+    pub enum SecondaryColor {
+        Orange,
+        Green,
+        Purple,
+    }
+}
+
+pub mod utils {
+    use crate::kinds::*;
+
+    /// Combines two primary colors in equal amounts to create
+    /// a secondary color.
+    pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
+        SecondaryColor::Orange
+    }
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/main.rs
new file mode 100644
index 000000000..b1a4bf792
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-04/src/main.rs
@@ -0,0 +1,8 @@
+use art::kinds::PrimaryColor;
+use art::utils::mix;
+
+fn main() {
+    let red = PrimaryColor::Red;
+    let yellow = PrimaryColor::Yellow;
+    mix(red, yellow);
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.lock
new file mode 100644
index 000000000..df19c247b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "art"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.toml
new file mode 100644
index 000000000..66ef4b532
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "art"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/src/lib.rs
new file mode 100644
index 000000000..c5aa9e7b0
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-05/src/lib.rs
@@ -0,0 +1,41 @@
+// ANCHOR: here
+//! # Art
+//!
+//! A library for modeling artistic concepts.
+
+pub use self::kinds::PrimaryColor;
+pub use self::kinds::SecondaryColor;
+pub use self::utils::mix;
+
+pub mod kinds {
+    // --snip--
+    // ANCHOR_END: here
+    /// The primary colors according to the RYB color model.
+    pub enum PrimaryColor {
+        Red,
+        Yellow,
+        Blue,
+    }
+
+    /// The secondary colors according to the RYB color model.
+    pub enum SecondaryColor {
+        Orange,
+        Green,
+        Purple,
+    }
+    // ANCHOR: here
+}
+
+pub mod utils {
+    // --snip--
+    // ANCHOR_END: here
+    use crate::kinds::*;
+
+    /// Combines two primary colors in equal amounts to create
+    /// a secondary color.
+    pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
+        SecondaryColor::Orange
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.lock
new file mode 100644
index 000000000..df19c247b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "art"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.toml
new file mode 100644
index 000000000..66ef4b532
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "art"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/lib.rs
new file mode 100644
index 000000000..daabd006d
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/lib.rs
@@ -0,0 +1,33 @@
+//! # Art
+//!
+//! A library for modeling artistic concepts.
+
+pub use self::kinds::PrimaryColor;
+pub use self::kinds::SecondaryColor;
+pub use self::utils::mix;
+
+pub mod kinds {
+    /// The primary colors according to the RYB color model.
+    pub enum PrimaryColor {
+        Red,
+        Yellow,
+        Blue,
+    }
+
+    /// The secondary colors according to the RYB color model.
+    pub enum SecondaryColor {
+        Orange,
+        Green,
+        Purple,
+    }
+}
+
+pub mod utils {
+    use crate::kinds::*;
+
+    /// Combines two primary colors in equal amounts to create
+    /// a secondary color.
+    pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
+        SecondaryColor::Orange
+    }
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/main.rs
new file mode 100644
index 000000000..51f3b761d
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-06/src/main.rs
@@ -0,0 +1,13 @@
+// ANCHOR: here
+use art::mix;
+use art::PrimaryColor;
+
+fn main() {
+    // --snip--
+    // ANCHOR_END: here
+    let red = PrimaryColor::Red;
+    let yellow = PrimaryColor::Yellow;
+    mix(red, yellow);
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.lock
new file mode 100644
index 000000000..a456055c9
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one 0.1.0",
+]
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/Cargo.toml
new file mode 100644
index 000000000..8af4ab816
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/src/lib.rs
new file mode 100644
index 000000000..b0bb86943
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/add_one/src/lib.rs
@@ -0,0 +1,3 @@
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/Cargo.toml
new file mode 100644
index 000000000..feb3d956e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/src/main.rs
new file mode 100644
index 000000000..131629490
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/listing-14-07/add/adder/src/main.rs
@@ -0,0 +1,6 @@
+use add_one;
+
+fn main() {
+    let num = 10;
+    println!("Hello, world! {num} plus one is {}!", add_one::add_one(num));
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.lock
new file mode 100644
index 000000000..d37189b33
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.toml
new file mode 100644
index 000000000..c5ea8e510
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/Cargo.toml
@@ -0,0 +1,5 @@
+[workspace]
+
+members = [
+    "adder",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/Cargo.toml
new file mode 100644
index 000000000..e61cb12e3
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-01-workspace-with-adder-crate/add/adder/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.lock
new file mode 100644
index 000000000..a456055c9
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one 0.1.0",
+]
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/Cargo.toml
new file mode 100644
index 000000000..8af4ab816
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/src/lib.rs
new file mode 100644
index 000000000..b0bb86943
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/add_one/src/lib.rs
@@ -0,0 +1,3 @@
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/Cargo.toml
new file mode 100644
index 000000000..55c02036c
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-02-workspace-with-two-crates/add/adder/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.lock
new file mode 100644
index 000000000..eec3a9e4b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.lock
@@ -0,0 +1,90 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "getrandom"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+
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+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "rand"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/Cargo.toml
new file mode 100644
index 000000000..fd4942ace
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/src/lib.rs
new file mode 100644
index 000000000..7b61b40a4
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/add_one/src/lib.rs
@@ -0,0 +1,5 @@
+use rand;
+
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/Cargo.toml
new file mode 100644
index 000000000..feb3d956e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/src/main.rs
new file mode 100644
index 000000000..7deb7962f
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-03-workspace-with-external-dependency/add/adder/src/main.rs
@@ -0,0 +1,10 @@
+use add_one;
+
+fn main() {
+    let num = 10;
+    println!(
+        "Hello, world! {} plus one is {}!",
+        num,
+        add_one::add_one(num)
+    );
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.lock
new file mode 100644
index 000000000..a456055c9
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one 0.1.0",
+]
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/Cargo.toml
new file mode 100644
index 000000000..8af4ab816
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/src/lib.rs
new file mode 100644
index 000000000..40ceb1285
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/add_one/src/lib.rs
@@ -0,0 +1,13 @@
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        assert_eq!(3, add_one(2));
+    }
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/Cargo.toml
new file mode 100644
index 000000000..feb3d956e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/src/main.rs
new file mode 100644
index 000000000..7deb7962f
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/no-listing-04-workspace-with-tests/add/adder/src/main.rs
@@ -0,0 +1,10 @@
+use add_one;
+
+fn main() {
+    let num = 10;
+    println!(
+        "Hello, world! {} plus one is {}!",
+        num,
+        add_one::add_one(num)
+    );
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.lock
new file mode 100644
index 000000000..d98623d6e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adder"
+version = "0.1.0"
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.toml
new file mode 100644
index 000000000..c5ea8e510
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/Cargo.toml
@@ -0,0 +1,5 @@
+[workspace]
+
+members = [
+    "adder",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/rustfmt-ignore b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/rustfmt-ignore
new file mode 100644
index 000000000..958e56837
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-01-adder-crate/add/rustfmt-ignore
@@ -0,0 +1,2 @@
+This listing is used for demonstrating how to set up a workspace, but the workspace isn't
+completely set up yet, so rustfmt complains the crate mentioned in Cargo.toml doesn't exist yet.
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.lock
new file mode 100644
index 000000000..a456055c9
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one 0.1.0",
+]
+
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/Cargo.toml
new file mode 100644
index 000000000..900018470
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs
new file mode 100644
index 000000000..1b4a90c93
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/add_one/src/lib.rs
@@ -0,0 +1,8 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result = 2 + 2;
+        assert_eq!(result, 4);
+    }
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/Cargo.toml
new file mode 100644
index 000000000..feb3d956e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-02-add-one/add/adder/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.lock b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.lock
new file mode 100644
index 000000000..eec3a9e4b
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.lock
@@ -0,0 +1,90 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "add_one"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "adder"
+version = "0.1.0"
+dependencies = [
+ "add_one",
+]
+
+[[package]]
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
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+ "libc",
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+ "rand_core",
+ "rand_hc",
+]
+
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+ "ppv-lite86",
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+]
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+]
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+ "rand_core",
+]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.toml
new file mode 100644
index 000000000..1448801d5
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add_one",
+]
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/Cargo.toml
new file mode 100644
index 000000000..fd4942ace
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "add_one"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+rand = "0.8.3"
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/src/lib.rs b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/src/lib.rs
new file mode 100644
index 000000000..7b61b40a4
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/add_one/src/lib.rs
@@ -0,0 +1,5 @@
+use rand;
+
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/Cargo.toml b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/Cargo.toml
new file mode 100644
index 000000000..feb3d956e
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+add_one = { path = "../add_one" }
diff --git a/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/src/main.rs b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/src/main.rs
new file mode 100644
index 000000000..eb4050dc3
--- /dev/null
+++ b/src/doc/book/listings/ch14-more-about-cargo/output-only-03-use-rand/add/adder/src/main.rs
@@ -0,0 +1,11 @@
+use add_one;
+use rand;
+
+fn main() {
+    let num = 10;
+    println!(
+        "Hello, world! {} plus one is {}!",
+        num,
+        add_one::add_one(num)
+    );
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.lock
new file mode 100644
index 000000000..8c125fc84
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "box-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.toml
new file mode 100644
index 000000000..690385c7a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "box-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-01/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/src/main.rs
new file mode 100644
index 000000000..8da1d905d
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-01/src/main.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let b = Box::new(5);
+    println!("b = {}", b);
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-02/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/src/main.rs
new file mode 100644
index 000000000..84640b9b9
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-02/src/main.rs
@@ -0,0 +1,8 @@
+// ANCHOR: here
+enum List {
+    Cons(i32, List),
+    Nil,
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-03/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/output.txt
new file mode 100644
index 000000000..437d74b5c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/output.txt
@@ -0,0 +1,27 @@
+$ cargo run
+   Compiling cons-list v0.1.0 (file:///projects/cons-list)
+error[E0072]: recursive type `List` has infinite size
+ --> src/main.rs:1:1
+  |
+1 | enum List {
+  | ^^^^^^^^^ recursive type has infinite size
+2 |     Cons(i32, List),
+  |               ---- recursive without indirection
+  |
+help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `List` representable
+  |
+2 |     Cons(i32, Box<List>),
+  |               ++++    +
+
+error[E0391]: cycle detected when computing drop-check constraints for `List`
+ --> src/main.rs:1:1
+  |
+1 | enum List {
+  | ^^^^^^^^^
+  |
+  = note: ...which immediately requires computing drop-check constraints for `List` again
+  = note: cycle used when computing dropck types for `Canonical { max_universe: U0, variables: [], value: ParamEnvAnd { param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst }, value: List } }`
+
+Some errors have detailed explanations: E0072, E0391.
+For more information about an error, try `rustc --explain E0072`.
+error: could not compile `cons-list` due to 2 previous errors
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-03/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/src/main.rs
new file mode 100644
index 000000000..a96f3d7b1
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-03/src/main.rs
@@ -0,0 +1,12 @@
+enum List {
+    Cons(i32, List),
+    Nil,
+}
+
+// ANCHOR: here
+use crate::List::{Cons, Nil};
+
+fn main() {
+    let list = Cons(1, Cons(2, Cons(3, Nil)));
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-05/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/src/main.rs
new file mode 100644
index 000000000..22f7d8338
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-05/src/main.rs
@@ -0,0 +1,10 @@
+enum List {
+    Cons(i32, Box<List>),
+    Nil,
+}
+
+use crate::List::{Cons, Nil};
+
+fn main() {
+    let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil))))));
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-06/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/src/main.rs
new file mode 100644
index 000000000..174b620cf
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-06/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let x = 5;
+    let y = &x;
+
+    assert_eq!(5, x);
+    assert_eq!(5, *y);
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-07/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/src/main.rs
new file mode 100644
index 000000000..4933a416b
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-07/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let x = 5;
+    let y = Box::new(x);
+
+    assert_eq!(5, x);
+    assert_eq!(5, *y);
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-08/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/src/main.rs
new file mode 100644
index 000000000..f48594673
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-08/src/main.rs
@@ -0,0 +1,11 @@
+// ANCHOR: here
+struct MyBox<T>(T);
+
+impl<T> MyBox<T> {
+    fn new(x: T) -> MyBox<T> {
+        MyBox(x)
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-09/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/output.txt
new file mode 100644
index 000000000..75e5f1c8c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/output.txt
@@ -0,0 +1,10 @@
+$ cargo run
+   Compiling deref-example v0.1.0 (file:///projects/deref-example)
+error[E0614]: type `MyBox<{integer}>` cannot be dereferenced
+  --> src/main.rs:14:19
+   |
+14 |     assert_eq!(5, *y);
+   |                   ^^
+
+For more information about this error, try `rustc --explain E0614`.
+error: could not compile `deref-example` due to previous error
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-09/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/src/main.rs
new file mode 100644
index 000000000..d07f2d78a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-09/src/main.rs
@@ -0,0 +1,17 @@
+struct MyBox<T>(T);
+
+impl<T> MyBox<T> {
+    fn new(x: T) -> MyBox<T> {
+        MyBox(x)
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let x = 5;
+    let y = MyBox::new(x);
+
+    assert_eq!(5, x);
+    assert_eq!(5, *y);
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-10/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/src/main.rs
new file mode 100644
index 000000000..cce754d08
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-10/src/main.rs
@@ -0,0 +1,27 @@
+// ANCHOR: here
+use std::ops::Deref;
+
+impl<T> Deref for MyBox<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+// ANCHOR_END: here
+
+struct MyBox<T>(T);
+
+impl<T> MyBox<T> {
+    fn new(x: T) -> MyBox<T> {
+        MyBox(x)
+    }
+}
+
+fn main() {
+    let x = 5;
+    let y = MyBox::new(x);
+
+    assert_eq!(5, x);
+    assert_eq!(5, *y);
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-11/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/src/main.rs
new file mode 100644
index 000000000..77a88c91f
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-11/src/main.rs
@@ -0,0 +1,7 @@
+// ANCHOR: here
+fn hello(name: &str) {
+    println!("Hello, {name}!");
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-12/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/src/main.rs
new file mode 100644
index 000000000..8cd3893cb
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-12/src/main.rs
@@ -0,0 +1,28 @@
+use std::ops::Deref;
+
+impl<T> Deref for MyBox<T> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &self.0
+    }
+}
+
+struct MyBox<T>(T);
+
+impl<T> MyBox<T> {
+    fn new(x: T) -> MyBox<T> {
+        MyBox(x)
+    }
+}
+
+fn hello(name: &str) {
+    println!("Hello, {name}!");
+}
+
+// ANCHOR: here
+fn main() {
+    let m = MyBox::new(String::from("Rust"));
+    hello(&m);
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-13/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/src/main.rs
new file mode 100644
index 000000000..9debe2a31
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-13/src/main.rs
@@ -0,0 +1,28 @@
+use std::ops::Deref;
+
+impl<T> Deref for MyBox<T> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &self.0
+    }
+}
+
+struct MyBox<T>(T);
+
+impl<T> MyBox<T> {
+    fn new(x: T) -> MyBox<T> {
+        MyBox(x)
+    }
+}
+
+fn hello(name: &str) {
+    println!("Hello, {name}!");
+}
+
+// ANCHOR: here
+fn main() {
+    let m = MyBox::new(String::from("Rust"));
+    hello(&(*m)[..]);
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.lock
new file mode 100644
index 000000000..eb8a2817a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "drop-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.toml
new file mode 100644
index 000000000..1e4c99481
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "drop-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-14/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/output.txt
new file mode 100644
index 000000000..4e795949a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling drop-example v0.1.0 (file:///projects/drop-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.60s
+     Running `target/debug/drop-example`
+CustomSmartPointers created.
+Dropping CustomSmartPointer with data `other stuff`!
+Dropping CustomSmartPointer with data `my stuff`!
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-14/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/src/main.rs
new file mode 100644
index 000000000..231612ae6
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-14/src/main.rs
@@ -0,0 +1,19 @@
+struct CustomSmartPointer {
+    data: String,
+}
+
+impl Drop for CustomSmartPointer {
+    fn drop(&mut self) {
+        println!("Dropping CustomSmartPointer with data `{}`!", self.data);
+    }
+}
+
+fn main() {
+    let c = CustomSmartPointer {
+        data: String::from("my stuff"),
+    };
+    let d = CustomSmartPointer {
+        data: String::from("other stuff"),
+    };
+    println!("CustomSmartPointers created.");
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.lock
new file mode 100644
index 000000000..eb8a2817a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "drop-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.toml
new file mode 100644
index 000000000..1e4c99481
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "drop-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-15/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/output.txt
new file mode 100644
index 000000000..a38c9ccb7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/output.txt
@@ -0,0 +1,13 @@
+$ cargo run
+   Compiling drop-example v0.1.0 (file:///projects/drop-example)
+error[E0040]: explicit use of destructor method
+  --> src/main.rs:16:7
+   |
+16 |     c.drop();
+   |     --^^^^--
+   |     | |
+   |     | explicit destructor calls not allowed
+   |     help: consider using `drop` function: `drop(c)`
+
+For more information about this error, try `rustc --explain E0040`.
+error: could not compile `drop-example` due to previous error
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-15/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/src/main.rs
new file mode 100644
index 000000000..ff3b391a9
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-15/src/main.rs
@@ -0,0 +1,20 @@
+struct CustomSmartPointer {
+    data: String,
+}
+
+impl Drop for CustomSmartPointer {
+    fn drop(&mut self) {
+        println!("Dropping CustomSmartPointer with data `{}`!", self.data);
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let c = CustomSmartPointer {
+        data: String::from("some data"),
+    };
+    println!("CustomSmartPointer created.");
+    c.drop();
+    println!("CustomSmartPointer dropped before the end of main.");
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.lock
new file mode 100644
index 000000000..eb8a2817a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "drop-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.toml
new file mode 100644
index 000000000..1e4c99481
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "drop-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-16/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/output.txt
new file mode 100644
index 000000000..e960cd89a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling drop-example v0.1.0 (file:///projects/drop-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.73s
+     Running `target/debug/drop-example`
+CustomSmartPointer created.
+Dropping CustomSmartPointer with data `some data`!
+CustomSmartPointer dropped before the end of main.
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-16/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/src/main.rs
new file mode 100644
index 000000000..f11715c45
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-16/src/main.rs
@@ -0,0 +1,20 @@
+struct CustomSmartPointer {
+    data: String,
+}
+
+impl Drop for CustomSmartPointer {
+    fn drop(&mut self) {
+        println!("Dropping CustomSmartPointer with data `{}`!", self.data);
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let c = CustomSmartPointer {
+        data: String::from("some data"),
+    };
+    println!("CustomSmartPointer created.");
+    drop(c);
+    println!("CustomSmartPointer dropped before the end of main.");
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-17/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/output.txt
new file mode 100644
index 000000000..ab314d883
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/output.txt
@@ -0,0 +1,14 @@
+$ cargo run
+   Compiling cons-list v0.1.0 (file:///projects/cons-list)
+error[E0382]: use of moved value: `a`
+  --> src/main.rs:11:30
+   |
+9  |     let a = Cons(5, Box::new(Cons(10, Box::new(Nil))));
+   |         - move occurs because `a` has type `List`, which does not implement the `Copy` trait
+10 |     let b = Cons(3, Box::new(a));
+   |                              - value moved here
+11 |     let c = Cons(4, Box::new(a));
+   |                              ^ value used here after move
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `cons-list` due to previous error
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-17/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/src/main.rs
new file mode 100644
index 000000000..47c33e4c4
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-17/src/main.rs
@@ -0,0 +1,12 @@
+enum List {
+    Cons(i32, Box<List>),
+    Nil,
+}
+
+use crate::List::{Cons, Nil};
+
+fn main() {
+    let a = Cons(5, Box::new(Cons(10, Box::new(Nil))));
+    let b = Cons(3, Box::new(a));
+    let c = Cons(4, Box::new(a));
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs
new file mode 100644
index 000000000..602f7de40
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs
@@ -0,0 +1,13 @@
+enum List {
+    Cons(i32, Rc<List>),
+    Nil,
+}
+
+use crate::List::{Cons, Nil};
+use std::rc::Rc;
+
+fn main() {
+    let a = Rc::new(Cons(5, Rc::new(Cons(10, Rc::new(Nil)))));
+    let b = Cons(3, Rc::clone(&a));
+    let c = Cons(4, Rc::clone(&a));
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-19/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/output.txt
new file mode 100644
index 000000000..6a8cc8efe
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/output.txt
@@ -0,0 +1,8 @@
+$ cargo run
+   Compiling cons-list v0.1.0 (file:///projects/cons-list)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.45s
+     Running `target/debug/cons-list`
+count after creating a = 1
+count after creating b = 2
+count after creating c = 3
+count after c goes out of scope = 2
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-19/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/src/main.rs
new file mode 100644
index 000000000..1bd7bc533
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-19/src/main.rs
@@ -0,0 +1,21 @@
+enum List {
+    Cons(i32, Rc<List>),
+    Nil,
+}
+
+use crate::List::{Cons, Nil};
+use std::rc::Rc;
+
+// ANCHOR: here
+fn main() {
+    let a = Rc::new(Cons(5, Rc::new(Cons(10, Rc::new(Nil)))));
+    println!("count after creating a = {}", Rc::strong_count(&a));
+    let b = Cons(3, Rc::clone(&a));
+    println!("count after creating b = {}", Rc::strong_count(&a));
+    {
+        let c = Cons(4, Rc::clone(&a));
+        println!("count after creating c = {}", Rc::strong_count(&a));
+    }
+    println!("count after c goes out of scope = {}", Rc::strong_count(&a));
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.lock
new file mode 100644
index 000000000..4dc2226a5
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "limit-tracker"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.toml
new file mode 100644
index 000000000..98c3f537c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "limit-tracker"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-20/src/lib.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/src/lib.rs
new file mode 100644
index 000000000..a5181834c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-20/src/lib.rs
@@ -0,0 +1,38 @@
+pub trait Messenger {
+    fn send(&self, msg: &str);
+}
+
+pub struct LimitTracker<'a, T: Messenger> {
+    messenger: &'a T,
+    value: usize,
+    max: usize,
+}
+
+impl<'a, T> LimitTracker<'a, T>
+where
+    T: Messenger,
+{
+    pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
+        LimitTracker {
+            messenger,
+            value: 0,
+            max,
+        }
+    }
+
+    pub fn set_value(&mut self, value: usize) {
+        self.value = value;
+
+        let percentage_of_max = self.value as f64 / self.max as f64;
+
+        if percentage_of_max >= 1.0 {
+            self.messenger.send("Error: You are over your quota!");
+        } else if percentage_of_max >= 0.9 {
+            self.messenger
+                .send("Urgent warning: You've used up over 90% of your quota!");
+        } else if percentage_of_max >= 0.75 {
+            self.messenger
+                .send("Warning: You've used up over 75% of your quota!");
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.lock
new file mode 100644
index 000000000..4dc2226a5
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "limit-tracker"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.toml
new file mode 100644
index 000000000..98c3f537c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "limit-tracker"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-21/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/output.txt
new file mode 100644
index 000000000..6b07b66ea
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/output.txt
@@ -0,0 +1,14 @@
+$ cargo test
+   Compiling limit-tracker v0.1.0 (file:///projects/limit-tracker)
+error[E0596]: cannot borrow `self.sent_messages` as mutable, as it is behind a `&` reference
+  --> src/lib.rs:58:13
+   |
+2  |     fn send(&self, msg: &str);
+   |             ----- help: consider changing that to be a mutable reference: `&mut self`
+...
+58 |             self.sent_messages.push(String::from(message));
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+
+For more information about this error, try `rustc --explain E0596`.
+error: could not compile `limit-tracker` due to previous error
+warning: build failed, waiting for other jobs to finish...
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-21/src/lib.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/src/lib.rs
new file mode 100644
index 000000000..4572d4313
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-21/src/lib.rs
@@ -0,0 +1,73 @@
+pub trait Messenger {
+    fn send(&self, msg: &str);
+}
+
+pub struct LimitTracker<'a, T: Messenger> {
+    messenger: &'a T,
+    value: usize,
+    max: usize,
+}
+
+impl<'a, T> LimitTracker<'a, T>
+where
+    T: Messenger,
+{
+    pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
+        LimitTracker {
+            messenger,
+            value: 0,
+            max,
+        }
+    }
+
+    pub fn set_value(&mut self, value: usize) {
+        self.value = value;
+
+        let percentage_of_max = self.value as f64 / self.max as f64;
+
+        if percentage_of_max >= 1.0 {
+            self.messenger.send("Error: You are over your quota!");
+        } else if percentage_of_max >= 0.9 {
+            self.messenger
+                .send("Urgent warning: You've used up over 90% of your quota!");
+        } else if percentage_of_max >= 0.75 {
+            self.messenger
+                .send("Warning: You've used up over 75% of your quota!");
+        }
+    }
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct MockMessenger {
+        sent_messages: Vec<String>,
+    }
+
+    impl MockMessenger {
+        fn new() -> MockMessenger {
+            MockMessenger {
+                sent_messages: vec![],
+            }
+        }
+    }
+
+    impl Messenger for MockMessenger {
+        fn send(&self, message: &str) {
+            self.sent_messages.push(String::from(message));
+        }
+    }
+
+    #[test]
+    fn it_sends_an_over_75_percent_warning_message() {
+        let mock_messenger = MockMessenger::new();
+        let mut limit_tracker = LimitTracker::new(&mock_messenger, 100);
+
+        limit_tracker.set_value(80);
+
+        assert_eq!(mock_messenger.sent_messages.len(), 1);
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.lock
new file mode 100644
index 000000000..4dc2226a5
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "limit-tracker"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.toml
new file mode 100644
index 000000000..98c3f537c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "limit-tracker"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-22/src/lib.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/src/lib.rs
new file mode 100644
index 000000000..a77ffa41c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-22/src/lib.rs
@@ -0,0 +1,78 @@
+pub trait Messenger {
+    fn send(&self, msg: &str);
+}
+
+pub struct LimitTracker<'a, T: Messenger> {
+    messenger: &'a T,
+    value: usize,
+    max: usize,
+}
+
+impl<'a, T> LimitTracker<'a, T>
+where
+    T: Messenger,
+{
+    pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
+        LimitTracker {
+            messenger,
+            value: 0,
+            max,
+        }
+    }
+
+    pub fn set_value(&mut self, value: usize) {
+        self.value = value;
+
+        let percentage_of_max = self.value as f64 / self.max as f64;
+
+        if percentage_of_max >= 1.0 {
+            self.messenger.send("Error: You are over your quota!");
+        } else if percentage_of_max >= 0.9 {
+            self.messenger
+                .send("Urgent warning: You've used up over 90% of your quota!");
+        } else if percentage_of_max >= 0.75 {
+            self.messenger
+                .send("Warning: You've used up over 75% of your quota!");
+        }
+    }
+}
+
+// ANCHOR: here
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::cell::RefCell;
+
+    struct MockMessenger {
+        sent_messages: RefCell<Vec<String>>,
+    }
+
+    impl MockMessenger {
+        fn new() -> MockMessenger {
+            MockMessenger {
+                sent_messages: RefCell::new(vec![]),
+            }
+        }
+    }
+
+    impl Messenger for MockMessenger {
+        fn send(&self, message: &str) {
+            self.sent_messages.borrow_mut().push(String::from(message));
+        }
+    }
+
+    #[test]
+    fn it_sends_an_over_75_percent_warning_message() {
+        // --snip--
+        // ANCHOR_END: here
+        let mock_messenger = MockMessenger::new();
+        let mut limit_tracker = LimitTracker::new(&mock_messenger, 100);
+
+        limit_tracker.set_value(80);
+        // ANCHOR: here
+
+        // ANCHOR: here
+        assert_eq!(mock_messenger.sent_messages.borrow().len(), 1);
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.lock
new file mode 100644
index 000000000..4dc2226a5
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "limit-tracker"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.toml
new file mode 100644
index 000000000..98c3f537c
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "limit-tracker"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-23/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/output.txt
new file mode 100644
index 000000000..c44e69f13
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/output.txt
@@ -0,0 +1,21 @@
+$ cargo test
+   Compiling limit-tracker v0.1.0 (file:///projects/limit-tracker)
+    Finished test [unoptimized + debuginfo] target(s) in 0.91s
+     Running unittests src/lib.rs (target/debug/deps/limit_tracker-e599811fa246dbde)
+
+running 1 test
+test tests::it_sends_an_over_75_percent_warning_message ... FAILED
+
+failures:
+
+---- tests::it_sends_an_over_75_percent_warning_message stdout ----
+thread 'main' panicked at 'already borrowed: BorrowMutError', src/lib.rs:60:53
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
+
+
+failures:
+    tests::it_sends_an_over_75_percent_warning_message
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+error: test failed, to rerun pass '--lib'
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-23/src/lib.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/src/lib.rs
new file mode 100644
index 000000000..7d288e680
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-23/src/lib.rs
@@ -0,0 +1,78 @@
+pub trait Messenger {
+    fn send(&self, msg: &str);
+}
+
+pub struct LimitTracker<'a, T: Messenger> {
+    messenger: &'a T,
+    value: usize,
+    max: usize,
+}
+
+impl<'a, T> LimitTracker<'a, T>
+where
+    T: Messenger,
+{
+    pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
+        LimitTracker {
+            messenger,
+            value: 0,
+            max,
+        }
+    }
+
+    pub fn set_value(&mut self, value: usize) {
+        self.value = value;
+
+        let percentage_of_max = self.value as f64 / self.max as f64;
+
+        if percentage_of_max >= 1.0 {
+            self.messenger.send("Error: You are over your quota!");
+        } else if percentage_of_max >= 0.9 {
+            self.messenger
+                .send("Urgent warning: You've used up over 90% of your quota!");
+        } else if percentage_of_max >= 0.75 {
+            self.messenger
+                .send("Warning: You've used up over 75% of your quota!");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::cell::RefCell;
+
+    struct MockMessenger {
+        sent_messages: RefCell<Vec<String>>,
+    }
+
+    impl MockMessenger {
+        fn new() -> MockMessenger {
+            MockMessenger {
+                sent_messages: RefCell::new(vec![]),
+            }
+        }
+    }
+
+    // ANCHOR: here
+    impl Messenger for MockMessenger {
+        fn send(&self, message: &str) {
+            let mut one_borrow = self.sent_messages.borrow_mut();
+            let mut two_borrow = self.sent_messages.borrow_mut();
+
+            one_borrow.push(String::from(message));
+            two_borrow.push(String::from(message));
+        }
+    }
+    // ANCHOR_END: here
+
+    #[test]
+    fn it_sends_an_over_75_percent_warning_message() {
+        let mock_messenger = MockMessenger::new();
+        let mut limit_tracker = LimitTracker::new(&mock_messenger, 100);
+
+        limit_tracker.set_value(80);
+
+        assert_eq!(mock_messenger.sent_messages.borrow().len(), 1);
+    }
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-24/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/output.txt
new file mode 100644
index 000000000..21b3530d9
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling cons-list v0.1.0 (file:///projects/cons-list)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.63s
+     Running `target/debug/cons-list`
+a after = Cons(RefCell { value: 15 }, Nil)
+b after = Cons(RefCell { value: 3 }, Cons(RefCell { value: 15 }, Nil))
+c after = Cons(RefCell { value: 4 }, Cons(RefCell { value: 15 }, Nil))
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-24/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/src/main.rs
new file mode 100644
index 000000000..e225bd862
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-24/src/main.rs
@@ -0,0 +1,24 @@
+#[derive(Debug)]
+enum List {
+    Cons(Rc<RefCell<i32>>, Rc<List>),
+    Nil,
+}
+
+use crate::List::{Cons, Nil};
+use std::cell::RefCell;
+use std::rc::Rc;
+
+fn main() {
+    let value = Rc::new(RefCell::new(5));
+
+    let a = Rc::new(Cons(Rc::clone(&value), Rc::new(Nil)));
+
+    let b = Cons(Rc::new(RefCell::new(3)), Rc::clone(&a));
+    let c = Cons(Rc::new(RefCell::new(4)), Rc::clone(&a));
+
+    *value.borrow_mut() += 10;
+
+    println!("a after = {:?}", a);
+    println!("b after = {:?}", b);
+    println!("c after = {:?}", c);
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-25/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/src/main.rs
new file mode 100644
index 000000000..f36c7fd06
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-25/src/main.rs
@@ -0,0 +1,20 @@
+use crate::List::{Cons, Nil};
+use std::cell::RefCell;
+use std::rc::Rc;
+
+#[derive(Debug)]
+enum List {
+    Cons(i32, RefCell<Rc<List>>),
+    Nil,
+}
+
+impl List {
+    fn tail(&self) -> Option<&RefCell<Rc<List>>> {
+        match self {
+            Cons(_, item) => Some(item),
+            Nil => None,
+        }
+    }
+}
+
+fn main() {}
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.lock
new file mode 100644
index 000000000..a792c49aa
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "cons-list"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.toml
new file mode 100644
index 000000000..dce1515c3
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "cons-list"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-26/output.txt b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/output.txt
new file mode 100644
index 000000000..8b8eb40b6
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/output.txt
@@ -0,0 +1,11 @@
+$ cargo run
+   Compiling cons-list v0.1.0 (file:///projects/cons-list)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.53s
+     Running `target/debug/cons-list`
+a initial rc count = 1
+a next item = Some(RefCell { value: Nil })
+a rc count after b creation = 2
+b initial rc count = 1
+b next item = Some(RefCell { value: Cons(5, RefCell { value: Nil }) })
+b rc count after changing a = 2
+a rc count after changing a = 2
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-26/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/src/main.rs
new file mode 100644
index 000000000..08963aaa5
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-26/src/main.rs
@@ -0,0 +1,44 @@
+use crate::List::{Cons, Nil};
+use std::cell::RefCell;
+use std::rc::Rc;
+
+#[derive(Debug)]
+enum List {
+    Cons(i32, RefCell<Rc<List>>),
+    Nil,
+}
+
+impl List {
+    fn tail(&self) -> Option<&RefCell<Rc<List>>> {
+        match self {
+            Cons(_, item) => Some(item),
+            Nil => None,
+        }
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let a = Rc::new(Cons(5, RefCell::new(Rc::new(Nil))));
+
+    println!("a initial rc count = {}", Rc::strong_count(&a));
+    println!("a next item = {:?}", a.tail());
+
+    let b = Rc::new(Cons(10, RefCell::new(Rc::clone(&a))));
+
+    println!("a rc count after b creation = {}", Rc::strong_count(&a));
+    println!("b initial rc count = {}", Rc::strong_count(&b));
+    println!("b next item = {:?}", b.tail());
+
+    if let Some(link) = a.tail() {
+        *link.borrow_mut() = Rc::clone(&b);
+    }
+
+    println!("b rc count after changing a = {}", Rc::strong_count(&b));
+    println!("a rc count after changing a = {}", Rc::strong_count(&a));
+
+    // Uncomment the next line to see that we have a cycle;
+    // it will overflow the stack
+    // println!("a next item = {:?}", a.tail());
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.lock
new file mode 100644
index 000000000..dd1f00a87
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tree"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.toml
new file mode 100644
index 000000000..0bbf897d0
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tree"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-27/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/src/main.rs
new file mode 100644
index 000000000..335d154dd
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-27/src/main.rs
@@ -0,0 +1,24 @@
+// ANCHOR: here
+use std::cell::RefCell;
+use std::rc::Rc;
+
+#[derive(Debug)]
+struct Node {
+    value: i32,
+    children: RefCell<Vec<Rc<Node>>>,
+}
+// ANCHOR_END: here
+
+// ANCHOR: there
+fn main() {
+    let leaf = Rc::new(Node {
+        value: 3,
+        children: RefCell::new(vec![]),
+    });
+
+    let branch = Rc::new(Node {
+        value: 5,
+        children: RefCell::new(vec![Rc::clone(&leaf)]),
+    });
+}
+// ANCHOR_END: there
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.lock
new file mode 100644
index 000000000..dd1f00a87
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tree"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.toml
new file mode 100644
index 000000000..0bbf897d0
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tree"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-28/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/src/main.rs
new file mode 100644
index 000000000..fabd1cbce
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-28/src/main.rs
@@ -0,0 +1,33 @@
+// ANCHOR: here
+use std::cell::RefCell;
+use std::rc::{Rc, Weak};
+
+#[derive(Debug)]
+struct Node {
+    value: i32,
+    parent: RefCell<Weak<Node>>,
+    children: RefCell<Vec<Rc<Node>>>,
+}
+// ANCHOR_END: here
+
+// ANCHOR: there
+fn main() {
+    let leaf = Rc::new(Node {
+        value: 3,
+        parent: RefCell::new(Weak::new()),
+        children: RefCell::new(vec![]),
+    });
+
+    println!("leaf parent = {:?}", leaf.parent.borrow().upgrade());
+
+    let branch = Rc::new(Node {
+        value: 5,
+        parent: RefCell::new(Weak::new()),
+        children: RefCell::new(vec![Rc::clone(&leaf)]),
+    });
+
+    *leaf.parent.borrow_mut() = Rc::downgrade(&branch);
+
+    println!("leaf parent = {:?}", leaf.parent.borrow().upgrade());
+}
+// ANCHOR_END: there
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.lock
new file mode 100644
index 000000000..dd1f00a87
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "tree"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.toml
new file mode 100644
index 000000000..0bbf897d0
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tree"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-29/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/src/main.rs
new file mode 100644
index 000000000..ea13df0eb
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-29/src/main.rs
@@ -0,0 +1,54 @@
+use std::cell::RefCell;
+use std::rc::{Rc, Weak};
+
+#[derive(Debug)]
+struct Node {
+    value: i32,
+    parent: RefCell<Weak<Node>>,
+    children: RefCell<Vec<Rc<Node>>>,
+}
+
+// ANCHOR: here
+fn main() {
+    let leaf = Rc::new(Node {
+        value: 3,
+        parent: RefCell::new(Weak::new()),
+        children: RefCell::new(vec![]),
+    });
+
+    println!(
+        "leaf strong = {}, weak = {}",
+        Rc::strong_count(&leaf),
+        Rc::weak_count(&leaf),
+    );
+
+    {
+        let branch = Rc::new(Node {
+            value: 5,
+            parent: RefCell::new(Weak::new()),
+            children: RefCell::new(vec![Rc::clone(&leaf)]),
+        });
+
+        *leaf.parent.borrow_mut() = Rc::downgrade(&branch);
+
+        println!(
+            "branch strong = {}, weak = {}",
+            Rc::strong_count(&branch),
+            Rc::weak_count(&branch),
+        );
+
+        println!(
+            "leaf strong = {}, weak = {}",
+            Rc::strong_count(&leaf),
+            Rc::weak_count(&leaf),
+        );
+    }
+
+    println!("leaf parent = {:?}", leaf.parent.borrow().upgrade());
+    println!(
+        "leaf strong = {}, weak = {}",
+        Rc::strong_count(&leaf),
+        Rc::weak_count(&leaf),
+    );
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.lock
new file mode 100644
index 000000000..340f6604a
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "borrowing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.toml
new file mode 100644
index 000000000..16f92447f
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "borrowing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
new file mode 100644
index 000000000..8e84746ee
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling borrowing v0.1.0 (file:///projects/borrowing)
+error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+ --> src/main.rs:3:13
+  |
+2 |     let x = 5;
+  |         - help: consider changing this to be mutable: `mut x`
+3 |     let y = &mut x;
+  |             ^^^^^^ cannot borrow as mutable
+
+For more information about this error, try `rustc --explain E0596`.
+error: could not compile `borrowing` due to previous error
diff --git a/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/src/main.rs
new file mode 100644
index 000000000..8f48d41c1
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/src/main.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let x = 5;
+    let y = &mut x;
+}
diff --git a/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.lock
new file mode 100644
index 000000000..4297c6733
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "deref-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.toml
new file mode 100644
index 000000000..67ec198f7
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deref-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt
new file mode 100644
index 000000000..a03cc34e2
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt
@@ -0,0 +1,23 @@
+$ cargo run
+   Compiling deref-example v0.1.0 (file:///projects/deref-example)
+error[E0277]: can't compare `{integer}` with `&{integer}`
+ --> src/main.rs:6:5
+  |
+6 |     assert_eq!(5, y);
+  |     ^^^^^^^^^^^^^^^^ no implementation for `{integer} == &{integer}`
+  |
+  = help: the trait `PartialEq<&{integer}>` is not implemented for `{integer}`
+  = help: the following other types implement trait `PartialEq<Rhs>`:
+            f32
+            f64
+            i128
+            i16
+            i32
+            i64
+            i8
+            isize
+          and 6 others
+  = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `deref-example` due to previous error
diff --git a/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/src/main.rs
new file mode 100644
index 000000000..4e20cae0b
--- /dev/null
+++ b/src/doc/book/listings/ch15-smart-pointers/output-only-01-comparing-to-reference/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let x = 5;
+    let y = &x;
+
+    assert_eq!(5, x);
+    assert_eq!(5, y);
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs
new file mode 100644
index 000000000..6305a98e3
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-01/src/main.rs
@@ -0,0 +1,16 @@
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    thread::spawn(|| {
+        for i in 1..10 {
+            println!("hi number {} from the spawned thread!", i);
+            thread::sleep(Duration::from_millis(1));
+        }
+    });
+
+    for i in 1..5 {
+        println!("hi number {} from the main thread!", i);
+        thread::sleep(Duration::from_millis(1));
+    }
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs
new file mode 100644
index 000000000..e37607f1d
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-02/src/main.rs
@@ -0,0 +1,18 @@
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    let handle = thread::spawn(|| {
+        for i in 1..10 {
+            println!("hi number {} from the spawned thread!", i);
+            thread::sleep(Duration::from_millis(1));
+        }
+    });
+
+    for i in 1..5 {
+        println!("hi number {} from the main thread!", i);
+        thread::sleep(Duration::from_millis(1));
+    }
+
+    handle.join().unwrap();
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/output.txt
new file mode 100644
index 000000000..321bf59d7
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/output.txt
@@ -0,0 +1,25 @@
+$ cargo run
+   Compiling threads v0.1.0 (file:///projects/threads)
+error[E0373]: closure may outlive the current function, but it borrows `v`, which is owned by the current function
+ --> src/main.rs:6:32
+  |
+6 |     let handle = thread::spawn(|| {
+  |                                ^^ may outlive borrowed value `v`
+7 |         println!("Here's a vector: {:?}", v);
+  |                                           - `v` is borrowed here
+  |
+note: function requires argument type to outlive `'static`
+ --> src/main.rs:6:18
+  |
+6 |       let handle = thread::spawn(|| {
+  |  __________________^
+7 | |         println!("Here's a vector: {:?}", v);
+8 | |     });
+  | |______^
+help: to force the closure to take ownership of `v` (and any other referenced variables), use the `move` keyword
+  |
+6 |     let handle = thread::spawn(move || {
+  |                                ++++
+
+For more information about this error, try `rustc --explain E0373`.
+error: could not compile `threads` due to previous error
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs
new file mode 100644
index 000000000..defc87648
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-03/src/main.rs
@@ -0,0 +1,11 @@
+use std::thread;
+
+fn main() {
+    let v = vec![1, 2, 3];
+
+    let handle = thread::spawn(|| {
+        println!("Here's a vector: {:?}", v);
+    });
+
+    handle.join().unwrap();
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs
new file mode 100644
index 000000000..0bccc5f56
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-04/src/main.rs
@@ -0,0 +1,13 @@
+use std::thread;
+
+fn main() {
+    let v = vec![1, 2, 3];
+
+    let handle = thread::spawn(|| {
+        println!("Here's a vector: {:?}", v);
+    });
+
+    drop(v); // oh no!
+
+    handle.join().unwrap();
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs
new file mode 100644
index 000000000..a6547dc4c
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-05/src/main.rs
@@ -0,0 +1,11 @@
+use std::thread;
+
+fn main() {
+    let v = vec![1, 2, 3];
+
+    let handle = thread::spawn(move || {
+        println!("Here's a vector: {:?}", v);
+    });
+
+    handle.join().unwrap();
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/src/main.rs
new file mode 100644
index 000000000..d80dac4a0
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-06/src/main.rs
@@ -0,0 +1,5 @@
+use std::sync::mpsc;
+
+fn main() {
+    let (tx, rx) = mpsc::channel();
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/src/main.rs
new file mode 100644
index 000000000..7859b64da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-07/src/main.rs
@@ -0,0 +1,11 @@
+use std::sync::mpsc;
+use std::thread;
+
+fn main() {
+    let (tx, rx) = mpsc::channel();
+
+    thread::spawn(move || {
+        let val = String::from("hi");
+        tx.send(val).unwrap();
+    });
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs
new file mode 100644
index 000000000..fbba9167d
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-08/src/main.rs
@@ -0,0 +1,14 @@
+use std::sync::mpsc;
+use std::thread;
+
+fn main() {
+    let (tx, rx) = mpsc::channel();
+
+    thread::spawn(move || {
+        let val = String::from("hi");
+        tx.send(val).unwrap();
+    });
+
+    let received = rx.recv().unwrap();
+    println!("Got: {}", received);
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/output.txt
new file mode 100644
index 000000000..0795a3a4f
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling message-passing v0.1.0 (file:///projects/message-passing)
+error[E0382]: borrow of moved value: `val`
+  --> src/main.rs:10:31
+   |
+8  |         let val = String::from("hi");
+   |             --- move occurs because `val` has type `String`, which does not implement the `Copy` trait
+9  |         tx.send(val).unwrap();
+   |                 --- value moved here
+10 |         println!("val is {}", val);
+   |                               ^^^ value borrowed here after move
+   |
+   = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `message-passing` due to previous error
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs
new file mode 100644
index 000000000..98a8129ab
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-09/src/main.rs
@@ -0,0 +1,15 @@
+use std::sync::mpsc;
+use std::thread;
+
+fn main() {
+    let (tx, rx) = mpsc::channel();
+
+    thread::spawn(move || {
+        let val = String::from("hi");
+        tx.send(val).unwrap();
+        println!("val is {}", val);
+    });
+
+    let received = rx.recv().unwrap();
+    println!("Got: {}", received);
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs
new file mode 100644
index 000000000..82b220de4
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-10/src/main.rs
@@ -0,0 +1,25 @@
+use std::sync::mpsc;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    let (tx, rx) = mpsc::channel();
+
+    thread::spawn(move || {
+        let vals = vec![
+            String::from("hi"),
+            String::from("from"),
+            String::from("the"),
+            String::from("thread"),
+        ];
+
+        for val in vals {
+            tx.send(val).unwrap();
+            thread::sleep(Duration::from_secs(1));
+        }
+    });
+
+    for received in rx {
+        println!("Got: {}", received);
+    }
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.lock
new file mode 100644
index 000000000..55d2252da
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "message-passing"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.toml
new file mode 100644
index 000000000..24bd2ee7b
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "message-passing"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs
new file mode 100644
index 000000000..d92deab5c
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-11/src/main.rs
@@ -0,0 +1,46 @@
+use std::sync::mpsc;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    // ANCHOR: here
+    // --snip--
+
+    let (tx, rx) = mpsc::channel();
+
+    let tx1 = tx.clone();
+    thread::spawn(move || {
+        let vals = vec![
+            String::from("hi"),
+            String::from("from"),
+            String::from("the"),
+            String::from("thread"),
+        ];
+
+        for val in vals {
+            tx1.send(val).unwrap();
+            thread::sleep(Duration::from_secs(1));
+        }
+    });
+
+    thread::spawn(move || {
+        let vals = vec![
+            String::from("more"),
+            String::from("messages"),
+            String::from("for"),
+            String::from("you"),
+        ];
+
+        for val in vals {
+            tx.send(val).unwrap();
+            thread::sleep(Duration::from_secs(1));
+        }
+    });
+
+    for received in rx {
+        println!("Got: {}", received);
+    }
+
+    // --snip--
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.lock
new file mode 100644
index 000000000..8e7ba9cf5
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shared-state"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.toml
new file mode 100644
index 000000000..da297eaba
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shared-state"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs
new file mode 100644
index 000000000..0c0d6767a
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-12/src/main.rs
@@ -0,0 +1,12 @@
+use std::sync::Mutex;
+
+fn main() {
+    let m = Mutex::new(5);
+
+    {
+        let mut num = m.lock().unwrap();
+        *num = 6;
+    }
+
+    println!("m = {:?}", m);
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock
new file mode 100644
index 000000000..8e7ba9cf5
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shared-state"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml
new file mode 100644
index 000000000..da297eaba
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shared-state"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt
new file mode 100644
index 000000000..ea6963903
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt
@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling shared-state v0.1.0 (file:///projects/shared-state)
+error[E0382]: use of moved value: `counter`
+  --> src/main.rs:9:36
+   |
+5  |     let counter = Mutex::new(0);
+   |         ------- move occurs because `counter` has type `Mutex<i32>`, which does not implement the `Copy` trait
+...
+9  |         let handle = thread::spawn(move || {
+   |                                    ^^^^^^^ value moved into closure here, in previous iteration of loop
+10 |             let mut num = counter.lock().unwrap();
+   |                           ------- use occurs due to use in closure
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `shared-state` due to previous error
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs
new file mode 100644
index 000000000..4e380a59a
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs
@@ -0,0 +1,22 @@
+use std::sync::Mutex;
+use std::thread;
+
+fn main() {
+    let counter = Mutex::new(0);
+    let mut handles = vec![];
+
+    for _ in 0..10 {
+        let handle = thread::spawn(move || {
+            let mut num = counter.lock().unwrap();
+
+            *num += 1;
+        });
+        handles.push(handle);
+    }
+
+    for handle in handles {
+        handle.join().unwrap();
+    }
+
+    println!("Result: {}", *counter.lock().unwrap());
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.lock
new file mode 100644
index 000000000..8e7ba9cf5
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shared-state"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.toml
new file mode 100644
index 000000000..da297eaba
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shared-state"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/output.txt
new file mode 100644
index 000000000..9546e1e48
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/output.txt
@@ -0,0 +1,21 @@
+$ cargo run
+   Compiling shared-state v0.1.0 (file:///projects/shared-state)
+error[E0277]: `Rc<Mutex<i32>>` cannot be sent between threads safely
+   --> src/main.rs:11:22
+    |
+11  |           let handle = thread::spawn(move || {
+    |  ______________________^^^^^^^^^^^^^_-
+    | |                      |
+    | |                      `Rc<Mutex<i32>>` cannot be sent between threads safely
+12  | |             let mut num = counter.lock().unwrap();
+13  | |
+14  | |             *num += 1;
+15  | |         });
+    | |_________- within this `[closure@src/main.rs:11:36: 15:10]`
+    |
+    = help: within `[closure@src/main.rs:11:36: 15:10]`, the trait `Send` is not implemented for `Rc<Mutex<i32>>`
+    = note: required because it appears within the type `[closure@src/main.rs:11:36: 15:10]`
+note: required by a bound in `spawn`
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `shared-state` due to previous error
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/src/main.rs
new file mode 100644
index 000000000..d940b1a34
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-14/src/main.rs
@@ -0,0 +1,24 @@
+use std::rc::Rc;
+use std::sync::Mutex;
+use std::thread;
+
+fn main() {
+    let counter = Rc::new(Mutex::new(0));
+    let mut handles = vec![];
+
+    for _ in 0..10 {
+        let counter = Rc::clone(&counter);
+        let handle = thread::spawn(move || {
+            let mut num = counter.lock().unwrap();
+
+            *num += 1;
+        });
+        handles.push(handle);
+    }
+
+    for handle in handles {
+        handle.join().unwrap();
+    }
+
+    println!("Result: {}", *counter.lock().unwrap());
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.lock
new file mode 100644
index 000000000..8e7ba9cf5
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shared-state"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.toml
new file mode 100644
index 000000000..da297eaba
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shared-state"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/src/main.rs
new file mode 100644
index 000000000..30247dd52
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-15/src/main.rs
@@ -0,0 +1,23 @@
+use std::sync::{Arc, Mutex};
+use std::thread;
+
+fn main() {
+    let counter = Arc::new(Mutex::new(0));
+    let mut handles = vec![];
+
+    for _ in 0..10 {
+        let counter = Arc::clone(&counter);
+        let handle = thread::spawn(move || {
+            let mut num = counter.lock().unwrap();
+
+            *num += 1;
+        });
+        handles.push(handle);
+    }
+
+    for handle in handles {
+        handle.join().unwrap();
+    }
+
+    println!("Result: {}", *counter.lock().unwrap());
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs
new file mode 100644
index 000000000..6205e57d3
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-01-join-too-early/src/main.rs
@@ -0,0 +1,18 @@
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    let handle = thread::spawn(|| {
+        for i in 1..10 {
+            println!("hi number {} from the spawned thread!", i);
+            thread::sleep(Duration::from_millis(1));
+        }
+    });
+
+    handle.join().unwrap();
+
+    for i in 1..5 {
+        println!("hi number {} from the main thread!", i);
+        thread::sleep(Duration::from_millis(1));
+    }
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.lock
new file mode 100644
index 000000000..8e7ba9cf5
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "shared-state"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.toml
new file mode 100644
index 000000000..da297eaba
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shared-state"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/src/main.rs
new file mode 100644
index 000000000..dbb139771
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/no-listing-02-no-loop-to-understand-error/src/main.rs
@@ -0,0 +1,27 @@
+use std::sync::Mutex;
+use std::thread;
+
+fn main() {
+    let counter = Mutex::new(0);
+    let mut handles = vec![];
+
+    let handle = thread::spawn(move || {
+        let mut num = counter.lock().unwrap();
+
+        *num += 1;
+    });
+    handles.push(handle);
+
+    let handle2 = thread::spawn(move || {
+        let mut num2 = counter.lock().unwrap();
+
+        *num2 += 1;
+    });
+    handles.push(handle2);
+
+    for handle in handles {
+        handle.join().unwrap();
+    }
+
+    println!("Result: {}", *counter.lock().unwrap());
+}
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.lock
new file mode 100644
index 000000000..8ecc3ae17
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "threads"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.toml
new file mode 100644
index 000000000..bd4edf762
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "threads"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt
new file mode 100644
index 000000000..f7be53b9a
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling threads v0.1.0 (file:///projects/threads)
+error[E0382]: use of moved value: `v`
+  --> src/main.rs:10:10
+   |
+4  |     let v = vec![1, 2, 3];
+   |         - move occurs because `v` has type `Vec<i32>`, which does not implement the `Copy` trait
+5  | 
+6  |     let handle = thread::spawn(move || {
+   |                                ------- value moved into closure here
+7  |         println!("Here's a vector: {:?}", v);
+   |                                           - variable moved due to use in closure
+...
+10 |     drop(v); // oh no!
+   |          ^ value used here after move
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `threads` due to previous error
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs
new file mode 100644
index 000000000..70f659c5f
--- /dev/null
+++ b/src/doc/book/listings/ch16-fearless-concurrency/output-only-01-move-drop/src/main.rs
@@ -0,0 +1,13 @@
+use std::thread;
+
+fn main() {
+    let v = vec![1, 2, 3];
+
+    let handle = thread::spawn(move || {
+        println!("Here's a vector: {:?}", v);
+    });
+
+    drop(v); // oh no!
+
+    handle.join().unwrap();
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.lock
new file mode 100644
index 000000000..471d8dfc3
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "averaged-collection"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.toml
new file mode 100644
index 000000000..aed614e93
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "averaged-collection"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-01/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-01/src/lib.rs
new file mode 100644
index 000000000..b5ce2ab64
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-01/src/lib.rs
@@ -0,0 +1,4 @@
+pub struct AveragedCollection {
+    list: Vec<i32>,
+    average: f64,
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.lock
new file mode 100644
index 000000000..471d8dfc3
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "averaged-collection"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.toml
new file mode 100644
index 000000000..aed614e93
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "averaged-collection"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-02/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-02/src/lib.rs
new file mode 100644
index 000000000..bb407ec5f
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-02/src/lib.rs
@@ -0,0 +1,33 @@
+pub struct AveragedCollection {
+    list: Vec<i32>,
+    average: f64,
+}
+
+// ANCHOR: here
+impl AveragedCollection {
+    pub fn add(&mut self, value: i32) {
+        self.list.push(value);
+        self.update_average();
+    }
+
+    pub fn remove(&mut self) -> Option<i32> {
+        let result = self.list.pop();
+        match result {
+            Some(value) => {
+                self.update_average();
+                Some(value)
+            }
+            None => None,
+        }
+    }
+
+    pub fn average(&self) -> f64 {
+        self.average
+    }
+
+    fn update_average(&mut self) {
+        let total: i32 = self.list.iter().sum();
+        self.average = total as f64 / self.list.len() as f64;
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-03/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-03/src/lib.rs
new file mode 100644
index 000000000..3a5cb779c
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-03/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait Draw {
+    fn draw(&self);
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-04/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-04/src/lib.rs
new file mode 100644
index 000000000..0c45e2a62
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-04/src/lib.rs
@@ -0,0 +1,9 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+// ANCHOR: here
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs
new file mode 100644
index 000000000..57ebb5782
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs
@@ -0,0 +1,17 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+
+// ANCHOR: here
+impl Screen {
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-06/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-06/src/lib.rs
new file mode 100644
index 000000000..63a8907d3
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-06/src/lib.rs
@@ -0,0 +1,20 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+// ANCHOR: here
+pub struct Screen<T: Draw> {
+    pub components: Vec<T>,
+}
+
+impl<T> Screen<T>
+where
+    T: Draw,
+{
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-07/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-07/src/lib.rs
new file mode 100644
index 000000000..b16cd0155
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-07/src/lib.rs
@@ -0,0 +1,29 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+
+impl Screen {
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+
+// ANCHOR: here
+pub struct Button {
+    pub width: u32,
+    pub height: u32,
+    pub label: String,
+}
+
+impl Draw for Button {
+    fn draw(&self) {
+        // code to actually draw a button
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-08/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-08/src/lib.rs
new file mode 100644
index 000000000..960fee23d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-08/src/lib.rs
@@ -0,0 +1,27 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+
+impl Screen {
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+
+pub struct Button {
+    pub width: u32,
+    pub height: u32,
+    pub label: String,
+}
+
+impl Draw for Button {
+    fn draw(&self) {
+        // code to actually draw a button
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-08/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-08/src/main.rs
new file mode 100644
index 000000000..9575d407e
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-08/src/main.rs
@@ -0,0 +1,17 @@
+// ANCHOR: here
+use gui::Draw;
+
+struct SelectBox {
+    width: u32,
+    height: u32,
+    options: Vec<String>,
+}
+
+impl Draw for SelectBox {
+    fn draw(&self) {
+        // code to actually draw a select box
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-09/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-09/src/lib.rs
new file mode 100644
index 000000000..960fee23d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-09/src/lib.rs
@@ -0,0 +1,27 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+
+impl Screen {
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+
+pub struct Button {
+    pub width: u32,
+    pub height: u32,
+    pub label: String,
+}
+
+impl Draw for Button {
+    fn draw(&self) {
+        // code to actually draw a button
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-09/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-09/src/main.rs
new file mode 100644
index 000000000..4eb13f6b7
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-09/src/main.rs
@@ -0,0 +1,40 @@
+use gui::Draw;
+
+struct SelectBox {
+    width: u32,
+    height: u32,
+    options: Vec<String>,
+}
+
+impl Draw for SelectBox {
+    fn draw(&self) {
+        // code to actually draw a select box
+    }
+}
+
+// ANCHOR: here
+use gui::{Button, Screen};
+
+fn main() {
+    let screen = Screen {
+        components: vec![
+            Box::new(SelectBox {
+                width: 75,
+                height: 10,
+                options: vec![
+                    String::from("Yes"),
+                    String::from("Maybe"),
+                    String::from("No"),
+                ],
+            }),
+            Box::new(Button {
+                width: 50,
+                height: 10,
+                label: String::from("OK"),
+            }),
+        ],
+    };
+
+    screen.run();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-10/output.txt b/src/doc/book/listings/ch17-oop/listing-17-10/output.txt
new file mode 100644
index 000000000..74330fa0a
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-10/output.txt
@@ -0,0 +1,13 @@
+$ cargo run
+   Compiling gui v0.1.0 (file:///projects/gui)
+error[E0277]: the trait bound `String: Draw` is not satisfied
+ --> src/main.rs:5:26
+  |
+5 |         components: vec![Box::new(String::from("Hi"))],
+  |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Draw` is not implemented for `String`
+  |
+  = help: the trait `Draw` is implemented for `Button`
+  = note: required for the cast to the object type `dyn Draw`
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `gui` due to previous error
diff --git a/src/doc/book/listings/ch17-oop/listing-17-10/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-10/src/lib.rs
new file mode 100644
index 000000000..960fee23d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-10/src/lib.rs
@@ -0,0 +1,27 @@
+pub trait Draw {
+    fn draw(&self);
+}
+
+pub struct Screen {
+    pub components: Vec<Box<dyn Draw>>,
+}
+
+impl Screen {
+    pub fn run(&self) {
+        for component in self.components.iter() {
+            component.draw();
+        }
+    }
+}
+
+pub struct Button {
+    pub width: u32,
+    pub height: u32,
+    pub label: String,
+}
+
+impl Draw for Button {
+    fn draw(&self) {
+        // code to actually draw a button
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-10/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-10/src/main.rs
new file mode 100644
index 000000000..2ede87ab7
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-10/src/main.rs
@@ -0,0 +1,9 @@
+use gui::Screen;
+
+fn main() {
+    let screen = Screen {
+        components: vec![Box::new(String::from("Hi"))],
+    };
+
+    screen.run();
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-11/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-11/src/main.rs
new file mode 100644
index 000000000..d99170a97
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-11/src/main.rs
@@ -0,0 +1,20 @@
+// ANCHOR: all
+use blog::Post;
+
+// ANCHOR: here
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+    // ANCHOR_END: here
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+    // ANCHOR: here
+}
+// ANCHOR_END: here
+// ANCHOR_END: all
diff --git a/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-12/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-12/src/lib.rs
new file mode 100644
index 000000000..b8156c39d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-12/src/lib.rs
@@ -0,0 +1,19 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+impl Post {
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+}
+
+trait State {}
+
+struct Draft {}
+
+impl State for Draft {}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-12/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-12/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-12/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-13/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-13/src/lib.rs
new file mode 100644
index 000000000..bd68557a0
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-13/src/lib.rs
@@ -0,0 +1,28 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+// ANCHOR: here
+impl Post {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    // ANCHOR: here
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+}
+// ANCHOR_END: here
+
+trait State {}
+
+struct Draft {}
+
+impl State for Draft {}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-13/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-13/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-13/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-14/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-14/src/lib.rs
new file mode 100644
index 000000000..09cf0c466
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-14/src/lib.rs
@@ -0,0 +1,32 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+// ANCHOR: here
+impl Post {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    // ANCHOR: here
+    pub fn content(&self) -> &str {
+        ""
+    }
+}
+// ANCHOR_END: here
+
+trait State {}
+
+struct Draft {}
+
+impl State for Draft {}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-14/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-14/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-14/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-15/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-15/src/lib.rs
new file mode 100644
index 000000000..909dd5274
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-15/src/lib.rs
@@ -0,0 +1,52 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+// ANCHOR: here
+impl Post {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    pub fn content(&self) -> &str {
+        ""
+    }
+
+    // ANCHOR: here
+    pub fn request_review(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.request_review())
+        }
+    }
+}
+
+trait State {
+    fn request_review(self: Box<Self>) -> Box<dyn State>;
+}
+
+struct Draft {}
+
+impl State for Draft {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        Box::new(PendingReview {})
+    }
+}
+
+struct PendingReview {}
+
+impl State for PendingReview {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-15/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-15/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-15/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-16/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-16/src/lib.rs
new file mode 100644
index 000000000..92cb29813
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-16/src/lib.rs
@@ -0,0 +1,85 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+// ANCHOR: here
+impl Post {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    pub fn content(&self) -> &str {
+        ""
+    }
+
+    pub fn request_review(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.request_review())
+        }
+    }
+
+    // ANCHOR: here
+    pub fn approve(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.approve())
+        }
+    }
+}
+
+trait State {
+    fn request_review(self: Box<Self>) -> Box<dyn State>;
+    fn approve(self: Box<Self>) -> Box<dyn State>;
+}
+
+struct Draft {}
+
+impl State for Draft {
+    // --snip--
+    // ANCHOR_END: here
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        Box::new(PendingReview {})
+    }
+
+    // ANCHOR: here
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
+
+struct PendingReview {}
+
+impl State for PendingReview {
+    // --snip--
+    // ANCHOR_END: here
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    // ANCHOR: here
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        Box::new(Published {})
+    }
+}
+
+struct Published {}
+
+impl State for Published {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-16/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-16/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-16/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-17/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-17/src/lib.rs
new file mode 100644
index 000000000..0beee7b8d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-17/src/lib.rs
@@ -0,0 +1,82 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+// ANCHOR: here
+impl Post {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    // ANCHOR: here
+    pub fn content(&self) -> &str {
+        self.state.as_ref().unwrap().content(self)
+    }
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn request_review(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.request_review())
+        }
+    }
+
+    pub fn approve(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.approve())
+        }
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
+
+trait State {
+    fn request_review(self: Box<Self>) -> Box<dyn State>;
+    fn approve(self: Box<Self>) -> Box<dyn State>;
+}
+
+struct Draft {}
+
+impl State for Draft {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        Box::new(PendingReview {})
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
+
+struct PendingReview {}
+
+impl State for PendingReview {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        Box::new(Published {})
+    }
+}
+
+struct Published {}
+
+impl State for Published {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-17/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-17/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-17/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-18/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-18/src/lib.rs
new file mode 100644
index 000000000..1bac8a87a
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-18/src/lib.rs
@@ -0,0 +1,94 @@
+pub struct Post {
+    state: Option<Box<dyn State>>,
+    content: String,
+}
+
+impl Post {
+    pub fn new() -> Post {
+        Post {
+            state: Some(Box::new(Draft {})),
+            content: String::new(),
+        }
+    }
+
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    pub fn content(&self) -> &str {
+        self.state.as_ref().unwrap().content(self)
+    }
+
+    pub fn request_review(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.request_review())
+        }
+    }
+
+    pub fn approve(&mut self) {
+        if let Some(s) = self.state.take() {
+            self.state = Some(s.approve())
+        }
+    }
+}
+
+// ANCHOR: here
+trait State {
+    // --snip--
+    // ANCHOR_END: here
+    fn request_review(self: Box<Self>) -> Box<dyn State>;
+    fn approve(self: Box<Self>) -> Box<dyn State>;
+
+    // ANCHOR: here
+    fn content<'a>(&self, post: &'a Post) -> &'a str {
+        ""
+    }
+}
+
+// --snip--
+// ANCHOR_END: here
+
+struct Draft {}
+
+impl State for Draft {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        Box::new(PendingReview {})
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+}
+
+struct PendingReview {}
+
+impl State for PendingReview {
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        Box::new(Published {})
+    }
+}
+
+// ANCHOR: here
+struct Published {}
+
+impl State for Published {
+    // --snip--
+    // ANCHOR_END: here
+    fn request_review(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    fn approve(self: Box<Self>) -> Box<dyn State> {
+        self
+    }
+
+    // ANCHOR: here
+    fn content<'a>(&self, post: &'a Post) -> &'a str {
+        &post.content
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-18/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-18/src/main.rs
new file mode 100644
index 000000000..14b4c0824
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-18/src/main.rs
@@ -0,0 +1,14 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+    assert_eq!("", post.content());
+
+    post.request_review();
+    assert_eq!("", post.content());
+
+    post.approve();
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-19/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-19/src/lib.rs
new file mode 100644
index 000000000..bfe034eaf
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-19/src/lib.rs
@@ -0,0 +1,25 @@
+pub struct Post {
+    content: String,
+}
+
+pub struct DraftPost {
+    content: String,
+}
+
+impl Post {
+    pub fn new() -> DraftPost {
+        DraftPost {
+            content: String::new(),
+        }
+    }
+
+    pub fn content(&self) -> &str {
+        &self.content
+    }
+}
+
+impl DraftPost {
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-20/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-20/src/lib.rs
new file mode 100644
index 000000000..3b82ec05d
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-20/src/lib.rs
@@ -0,0 +1,48 @@
+pub struct Post {
+    content: String,
+}
+
+pub struct DraftPost {
+    content: String,
+}
+
+impl Post {
+    pub fn new() -> DraftPost {
+        DraftPost {
+            content: String::new(),
+        }
+    }
+
+    pub fn content(&self) -> &str {
+        &self.content
+    }
+}
+
+// ANCHOR: here
+impl DraftPost {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    // ANCHOR: here
+    pub fn request_review(self) -> PendingReviewPost {
+        PendingReviewPost {
+            content: self.content,
+        }
+    }
+}
+
+pub struct PendingReviewPost {
+    content: String,
+}
+
+impl PendingReviewPost {
+    pub fn approve(self) -> Post {
+        Post {
+            content: self.content,
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.lock
new file mode 100644
index 000000000..b6f4232c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "blog"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.toml
new file mode 100644
index 000000000..1619af5c6
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "blog"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-21/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-21/src/lib.rs
new file mode 100644
index 000000000..38500a651
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-21/src/lib.rs
@@ -0,0 +1,43 @@
+pub struct Post {
+    content: String,
+}
+
+pub struct DraftPost {
+    content: String,
+}
+
+impl Post {
+    pub fn new() -> DraftPost {
+        DraftPost {
+            content: String::new(),
+        }
+    }
+
+    pub fn content(&self) -> &str {
+        &self.content
+    }
+}
+
+impl DraftPost {
+    pub fn add_text(&mut self, text: &str) {
+        self.content.push_str(text);
+    }
+
+    pub fn request_review(self) -> PendingReviewPost {
+        PendingReviewPost {
+            content: self.content,
+        }
+    }
+}
+
+pub struct PendingReviewPost {
+    content: String,
+}
+
+impl PendingReviewPost {
+    pub fn approve(self) -> Post {
+        Post {
+            content: self.content,
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch17-oop/listing-17-21/src/main.rs b/src/doc/book/listings/ch17-oop/listing-17-21/src/main.rs
new file mode 100644
index 000000000..720c55e6a
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-21/src/main.rs
@@ -0,0 +1,13 @@
+use blog::Post;
+
+fn main() {
+    let mut post = Post::new();
+
+    post.add_text("I ate a salad for lunch today");
+
+    let post = post.request_review();
+
+    let post = post.approve();
+
+    assert_eq!("I ate a salad for lunch today", post.content());
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/src/main.rs
new file mode 100644
index 000000000..fc87768fb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-01/src/main.rs
@@ -0,0 +1,19 @@
+fn main() {
+    let favorite_color: Option<&str> = None;
+    let is_tuesday = false;
+    let age: Result<u8, _> = "34".parse();
+
+    if let Some(color) = favorite_color {
+        println!("Using your favorite color, {color}, as the background");
+    } else if is_tuesday {
+        println!("Tuesday is green day!");
+    } else if let Ok(age) = age {
+        if age > 30 {
+            println!("Using purple as the background color");
+        } else {
+            println!("Using orange as the background color");
+        }
+    } else {
+        println!("Using blue as the background color");
+    }
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs
new file mode 100644
index 000000000..5f75a4f2d
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-02/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    let mut stack = Vec::new();
+
+    stack.push(1);
+    stack.push(2);
+    stack.push(3);
+
+    while let Some(top) = stack.pop() {
+        println!("{}", top);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/output.txt
new file mode 100644
index 000000000..02fdecbf5
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.52s
+     Running `target/debug/patterns`
+a is at index 0
+b is at index 1
+c is at index 2
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs
new file mode 100644
index 000000000..eb922d62c
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-03/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    let v = vec!['a', 'b', 'c'];
+
+    for (index, value) in v.iter().enumerate() {
+        println!("{} is at index {}", value, index);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/src/main.rs
new file mode 100644
index 000000000..27b0c3fbd
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-04/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let (x, y, z) = (1, 2, 3);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/output.txt
new file mode 100644
index 000000000..57916a1f1
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/output.txt
@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+error[E0308]: mismatched types
+ --> src/main.rs:2:9
+  |
+2 |     let (x, y) = (1, 2, 3);
+  |         ^^^^^^   --------- this expression has type `({integer}, {integer}, {integer})`
+  |         |
+  |         expected a tuple with 3 elements, found one with 2 elements
+  |
+  = note: expected tuple `({integer}, {integer}, {integer})`
+             found tuple `(_, _)`
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `patterns` due to previous error
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/src/main.rs
new file mode 100644
index 000000000..39f768e29
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-05/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // ANCHOR: here
+    let (x, y) = (1, 2, 3);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/src/main.rs
new file mode 100644
index 000000000..c5d71e6c1
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-06/src/main.rs
@@ -0,0 +1,7 @@
+// ANCHOR: here
+fn foo(x: i32) {
+    // code goes here
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs
new file mode 100644
index 000000000..4eccb8088
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-07/src/main.rs
@@ -0,0 +1,8 @@
+fn print_coordinates(&(x, y): &(i32, i32)) {
+    println!("Current location: ({}, {})", x, y);
+}
+
+fn main() {
+    let point = (3, 5);
+    print_coordinates(&point);
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt
new file mode 100644
index 000000000..72274d07c
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt
@@ -0,0 +1,19 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+error[E0005]: refutable pattern in local binding: `None` not covered
+   --> src/main.rs:3:9
+    |
+3   |     let Some(x) = some_option_value;
+    |         ^^^^^^^ pattern `None` not covered
+    |
+    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
+    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
+note: `Option<i32>` defined here
+    = note: the matched value is of type `Option<i32>`
+help: you might want to use `if let` to ignore the variant that isn't matched
+    |
+3   |     let x = if let Some(x) = some_option_value { x } else { todo!() };
+    |     ++++++++++                                 ++++++++++++++++++++++
+
+For more information about this error, try `rustc --explain E0005`.
+error: could not compile `patterns` due to previous error
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/src/main.rs
new file mode 100644
index 000000000..7baa02a49
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let some_option_value: Option<i32> = None;
+    // ANCHOR: here
+    let Some(x) = some_option_value;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs
new file mode 100644
index 000000000..d6274fc0e
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-09/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    let some_option_value: Option<i32> = None;
+    // ANCHOR: here
+    if let Some(x) = some_option_value {
+        println!("{}", x);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt
new file mode 100644
index 000000000..702d10a23
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt
@@ -0,0 +1,16 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+warning: irrefutable `if let` pattern
+ --> src/main.rs:2:8
+  |
+2 |     if let x = 5 {
+  |        ^^^^^^^^^
+  |
+  = note: `#[warn(irrefutable_let_patterns)]` on by default
+  = note: this pattern will always match, so the `if let` is useless
+  = help: consider replacing the `if let` with a `let`
+
+warning: `patterns` (bin "patterns") generated 1 warning
+    Finished dev [unoptimized + debuginfo] target(s) in 0.39s
+     Running `target/debug/patterns`
+5
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs
new file mode 100644
index 000000000..cb81772e0
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    if let x = 5 {
+        println!("{}", x);
+    };
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs
new file mode 100644
index 000000000..db942b7ac
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-11/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let x = Some(5);
+    let y = 10;
+
+    match x {
+        Some(50) => println!("Got 50"),
+        Some(y) => println!("Matched, y = {y}"),
+        _ => println!("Default case, x = {:?}", x),
+    }
+
+    println!("at the end: x = {:?}, y = {y}", x);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/src/main.rs
new file mode 100644
index 000000000..62f4ccbf1
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-12/src/main.rs
@@ -0,0 +1,12 @@
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    let p = Point { x: 0, y: 7 };
+
+    let Point { x: a, y: b } = p;
+    assert_eq!(0, a);
+    assert_eq!(7, b);
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/src/main.rs
new file mode 100644
index 000000000..5badc1594
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-13/src/main.rs
@@ -0,0 +1,12 @@
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    let p = Point { x: 0, y: 7 };
+
+    let Point { x, y } = p;
+    assert_eq!(0, x);
+    assert_eq!(7, y);
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/src/main.rs
new file mode 100644
index 000000000..8d445d9b9
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-14/src/main.rs
@@ -0,0 +1,16 @@
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+// ANCHOR: here
+fn main() {
+    let p = Point { x: 0, y: 7 };
+
+    match p {
+        Point { x, y: 0 } => println!("On the x axis at {}", x),
+        Point { x: 0, y } => println!("On the y axis at {}", y),
+        Point { x, y } => println!("On neither axis: ({}, {})", x, y),
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs
new file mode 100644
index 000000000..9b8dac193
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-15/src/main.rs
@@ -0,0 +1,27 @@
+enum Message {
+    Quit,
+    Move { x: i32, y: i32 },
+    Write(String),
+    ChangeColor(i32, i32, i32),
+}
+
+fn main() {
+    let msg = Message::ChangeColor(0, 160, 255);
+
+    match msg {
+        Message::Quit => {
+            println!("The Quit variant has no data to destructure.")
+        }
+        Message::Move { x, y } => {
+            println!(
+                "Move in the x direction {} and in the y direction {}",
+                x, y
+            );
+        }
+        Message::Write(text) => println!("Text message: {}", text),
+        Message::ChangeColor(r, g, b) => println!(
+            "Change the color to red {}, green {}, and blue {}",
+            r, g, b
+        ),
+    }
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/src/main.rs
new file mode 100644
index 000000000..ed6a20bf4
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-16/src/main.rs
@@ -0,0 +1,27 @@
+enum Color {
+    Rgb(i32, i32, i32),
+    Hsv(i32, i32, i32),
+}
+
+enum Message {
+    Quit,
+    Move { x: i32, y: i32 },
+    Write(String),
+    ChangeColor(Color),
+}
+
+fn main() {
+    let msg = Message::ChangeColor(Color::Hsv(0, 160, 255));
+
+    match msg {
+        Message::ChangeColor(Color::Rgb(r, g, b)) => println!(
+            "Change the color to red {}, green {}, and blue {}",
+            r, g, b
+        ),
+        Message::ChangeColor(Color::Hsv(h, s, v)) => println!(
+            "Change the color to hue {}, saturation {}, and value {}",
+            h, s, v
+        ),
+        _ => (),
+    }
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs
new file mode 100644
index 000000000..cf1fbe072
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-17/src/main.rs
@@ -0,0 +1,7 @@
+fn foo(_: i32, y: i32) {
+    println!("This code only uses the y parameter: {}", y);
+}
+
+fn main() {
+    foo(3, 4);
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs
new file mode 100644
index 000000000..b776c64c4
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-18/src/main.rs
@@ -0,0 +1,17 @@
+fn main() {
+    // ANCHOR: here
+    let mut setting_value = Some(5);
+    let new_setting_value = Some(10);
+
+    match (setting_value, new_setting_value) {
+        (Some(_), Some(_)) => {
+            println!("Can't overwrite an existing customized value");
+        }
+        _ => {
+            setting_value = new_setting_value;
+        }
+    }
+
+    println!("setting is {:?}", setting_value);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/src/main.rs
new file mode 100644
index 000000000..e28dab111
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-19/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let numbers = (2, 4, 8, 16, 32);
+
+    match numbers {
+        (first, _, third, _, fifth) => {
+            println!("Some numbers: {first}, {third}, {fifth}")
+        }
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/src/main.rs
new file mode 100644
index 000000000..1ffc46bad
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-20/src/main.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let _x = 5;
+    let y = 10;
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs
new file mode 100644
index 000000000..980610503
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-21/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let s = Some(String::from("Hello!"));
+
+    if let Some(_s) = s {
+        println!("found a string");
+    }
+
+    println!("{:?}", s);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs
new file mode 100644
index 000000000..e2faa345b
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-22/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let s = Some(String::from("Hello!"));
+
+    if let Some(_) = s {
+        println!("found a string");
+    }
+
+    println!("{:?}", s);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs
new file mode 100644
index 000000000..7a9d9bb36
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-23/src/main.rs
@@ -0,0 +1,15 @@
+fn main() {
+    // ANCHOR: here
+    struct Point {
+        x: i32,
+        y: i32,
+        z: i32,
+    }
+
+    let origin = Point { x: 0, y: 0, z: 0 };
+
+    match origin {
+        Point { x, .. } => println!("x is {}", x),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/src/main.rs
new file mode 100644
index 000000000..3f9aaafc2
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-24/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let numbers = (2, 4, 8, 16, 32);
+
+    match numbers {
+        (first, .., last) => {
+            println!("Some numbers: {first}, {last}");
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.lock
new file mode 100644
index 000000000..a233623e5
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/output.txt
new file mode 100644
index 000000000..7e0357eac
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/output.txt
@@ -0,0 +1,11 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+error: `..` can only be used once per tuple pattern
+ --> src/main.rs:5:22
+  |
+5 |         (.., second, ..) => {
+  |          --          ^^ can only be used once per tuple pattern
+  |          |
+  |          previously used here
+
+error: could not compile `patterns` due to previous error
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/rustfmt-ignore b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/rustfmt-ignore
new file mode 100644
index 000000000..06a976dd4
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/rustfmt-ignore
@@ -0,0 +1 @@
+This listing deliberately doesn't parse so rustfmt fails.
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs
new file mode 100644
index 000000000..b90884eb9
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-25/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let numbers = (2, 4, 8, 16, 32);
+
+    match numbers {
+        (.., second, ..) => {
+            println!("Some numbers: {}", second)
+        },
+    }
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs
new file mode 100644
index 000000000..41fce9795
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-26/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let num = Some(4);
+
+    match num {
+        Some(x) if x % 2 == 0 => println!("The number {} is even", x),
+        Some(x) => println!("The number {} is odd", x),
+        None => (),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs
new file mode 100644
index 000000000..8386a0ab8
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-27/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    let x = Some(5);
+    let y = 10;
+
+    match x {
+        Some(50) => println!("Got 50"),
+        Some(n) if n == y => println!("Matched, n = {n}"),
+        _ => println!("Default case, x = {:?}", x),
+    }
+
+    println!("at the end: x = {:?}, y = {y}", x);
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/src/main.rs
new file mode 100644
index 000000000..15804553f
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-28/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let x = 4;
+    let y = false;
+
+    match x {
+        4 | 5 | 6 if y => println!("yes"),
+        _ => println!("no"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs
new file mode 100644
index 000000000..3514deb63
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-29/src/main.rs
@@ -0,0 +1,19 @@
+fn main() {
+    // ANCHOR: here
+    enum Message {
+        Hello { id: i32 },
+    }
+
+    let msg = Message::Hello { id: 5 };
+
+    match msg {
+        Message::Hello {
+            id: id_variable @ 3..=7,
+        } => println!("Found an id in range: {}", id_variable),
+        Message::Hello { id: 10..=12 } => {
+            println!("Found an id in another range")
+        }
+        Message::Hello { id } => println!("Found some other id: {}", id),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/src/main.rs
new file mode 100644
index 000000000..7978e1ade
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-01-literals/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: here
+    let x = 1;
+
+    match x {
+        1 => println!("one"),
+        2 => println!("two"),
+        3 => println!("three"),
+        _ => println!("anything"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/src/main.rs
new file mode 100644
index 000000000..e52d815d8
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-02-multiple-patterns/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let x = 1;
+
+    match x {
+        1 | 2 => println!("one or two"),
+        3 => println!("three"),
+        _ => println!("anything"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/src/main.rs
new file mode 100644
index 000000000..a3ebe7af0
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-03-ranges/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    let x = 5;
+
+    match x {
+        1..=5 => println!("one through five"),
+        _ => println!("something else"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/src/main.rs
new file mode 100644
index 000000000..8cebfef5e
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-04-ranges-of-char/src/main.rs
@@ -0,0 +1,11 @@
+fn main() {
+    // ANCHOR: here
+    let x = 'c';
+
+    match x {
+        'a'..='j' => println!("early ASCII letter"),
+        'k'..='z' => println!("late ASCII letter"),
+        _ => println!("something else"),
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.lock b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.lock
new file mode 100644
index 000000000..2b4fa2903
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "patterns"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.toml b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.toml
new file mode 100644
index 000000000..82fe057bb
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "patterns"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/src/main.rs b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/src/main.rs
new file mode 100644
index 000000000..962d09349
--- /dev/null
+++ b/src/doc/book/listings/ch18-patterns-and-matching/no-listing-05-destructuring-structs-and-tuples/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    struct Point {
+        x: i32,
+        y: i32,
+    }
+
+    // ANCHOR: here
+    let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-01/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-01/src/main.rs
new file mode 100644
index 000000000..893f57890
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-01/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // ANCHOR: here
+    let mut num = 5;
+
+    let r1 = &num as *const i32;
+    let r2 = &mut num as *mut i32;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-02/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-02/src/main.rs
new file mode 100644
index 000000000..849629a7c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-02/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let address = 0x012345usize;
+    let r = address as *const i32;
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-03/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-03/src/main.rs
new file mode 100644
index 000000000..02a0be6b0
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-03/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // ANCHOR: here
+    let mut num = 5;
+
+    let r1 = &num as *const i32;
+    let r2 = &mut num as *mut i32;
+
+    unsafe {
+        println!("r1 is: {}", *r1);
+        println!("r2 is: {}", *r2);
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-04/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-04/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-04/src/main.rs
new file mode 100644
index 000000000..6ac58442d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-04/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: here
+    let mut v = vec![1, 2, 3, 4, 5, 6];
+
+    let r = &mut v[..];
+
+    let (a, b) = r.split_at_mut(3);
+
+    assert_eq!(a, &mut [1, 2, 3]);
+    assert_eq!(b, &mut [4, 5, 6]);
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-05/output.txt b/src/doc/book/listings/ch19-advanced-features/listing-19-05/output.txt
new file mode 100644
index 000000000..f4b7582ac
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-05/output.txt
@@ -0,0 +1,17 @@
+$ cargo run
+   Compiling unsafe-example v0.1.0 (file:///projects/unsafe-example)
+error[E0499]: cannot borrow `*values` as mutable more than once at a time
+ --> src/main.rs:6:31
+  |
+1 | fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
+  |                         - let's call the lifetime of this reference `'1`
+...
+6 |     (&mut values[..mid], &mut values[mid..])
+  |     --------------------------^^^^^^--------
+  |     |     |                   |
+  |     |     |                   second mutable borrow occurs here
+  |     |     first mutable borrow occurs here
+  |     returning this value requires that `*values` is borrowed for `'1`
+
+For more information about this error, try `rustc --explain E0499`.
+error: could not compile `unsafe-example` due to previous error
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-05/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-05/src/main.rs
new file mode 100644
index 000000000..dabf63de1
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-05/src/main.rs
@@ -0,0 +1,14 @@
+// ANCHOR: here
+fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
+    let len = values.len();
+
+    assert!(mid <= len);
+
+    (&mut values[..mid], &mut values[mid..])
+}
+// ANCHOR_END: here
+
+fn main() {
+    let mut vector = vec![1, 2, 3, 4, 5, 6];
+    let (left, right) = split_at_mut(&mut vector, 3);
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs
new file mode 100644
index 000000000..3af21f761
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs
@@ -0,0 +1,22 @@
+// ANCHOR: here
+use std::slice;
+
+fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
+    let len = values.len();
+    let ptr = values.as_mut_ptr();
+
+    assert!(mid <= len);
+
+    unsafe {
+        (
+            slice::from_raw_parts_mut(ptr, mid),
+            slice::from_raw_parts_mut(ptr.add(mid), len - mid),
+        )
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let mut vector = vec![1, 2, 3, 4, 5, 6];
+    let (left, right) = split_at_mut(&mut vector, 3);
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-07/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-07/src/main.rs
new file mode 100644
index 000000000..b4d6cdb7c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-07/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    use std::slice;
+
+    let address = 0x01234usize;
+    let r = address as *mut i32;
+
+    let values: &[i32] = unsafe { slice::from_raw_parts_mut(r, 10000) };
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-08/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-08/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-08/src/main.rs
new file mode 100644
index 000000000..8b56630c9
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-08/src/main.rs
@@ -0,0 +1,9 @@
+extern "C" {
+    fn abs(input: i32) -> i32;
+}
+
+fn main() {
+    unsafe {
+        println!("Absolute value of -3 according to C: {}", abs(-3));
+    }
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-09/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-09/src/main.rs
new file mode 100644
index 000000000..82a4b4219
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-09/src/main.rs
@@ -0,0 +1,5 @@
+static HELLO_WORLD: &str = "Hello, world!";
+
+fn main() {
+    println!("name is: {}", HELLO_WORLD);
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-10/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-10/src/main.rs
new file mode 100644
index 000000000..e8dab68e0
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-10/src/main.rs
@@ -0,0 +1,15 @@
+static mut COUNTER: u32 = 0;
+
+fn add_to_count(inc: u32) {
+    unsafe {
+        COUNTER += inc;
+    }
+}
+
+fn main() {
+    add_to_count(3);
+
+    unsafe {
+        println!("COUNTER: {}", COUNTER);
+    }
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-11/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-11/src/main.rs
new file mode 100644
index 000000000..885c1aa1d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-11/src/main.rs
@@ -0,0 +1,9 @@
+unsafe trait Foo {
+    // methods go here
+}
+
+unsafe impl Foo for i32 {
+    // method implementations go here
+}
+
+fn main() {}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-12/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-12/src/lib.rs
new file mode 100644
index 000000000..dbe04620e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-12/src/lib.rs
@@ -0,0 +1,5 @@
+pub trait Iterator {
+    type Item;
+
+    fn next(&mut self) -> Option<Self::Item>;
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-13/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-13/src/lib.rs
new file mode 100644
index 000000000..7c9479c5b
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-13/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait Iterator<T> {
+    fn next(&mut self) -> Option<T>;
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-14/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-14/src/main.rs
new file mode 100644
index 000000000..9111fbc55
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-14/src/main.rs
@@ -0,0 +1,25 @@
+use std::ops::Add;
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+impl Add for Point {
+    type Output = Point;
+
+    fn add(self, other: Point) -> Point {
+        Point {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
+    }
+}
+
+fn main() {
+    assert_eq!(
+        Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
+        Point { x: 3, y: 3 }
+    );
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-15/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-15/src/lib.rs
new file mode 100644
index 000000000..f38bf475c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-15/src/lib.rs
@@ -0,0 +1,12 @@
+use std::ops::Add;
+
+struct Millimeters(u32);
+struct Meters(u32);
+
+impl Add<Meters> for Millimeters {
+    type Output = Millimeters;
+
+    fn add(self, other: Meters) -> Millimeters {
+        Millimeters(self.0 + (other.0 * 1000))
+    }
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-16/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-16/src/main.rs
new file mode 100644
index 000000000..d854e287d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-16/src/main.rs
@@ -0,0 +1,31 @@
+// ANCHOR: here
+trait Pilot {
+    fn fly(&self);
+}
+
+trait Wizard {
+    fn fly(&self);
+}
+
+struct Human;
+
+impl Pilot for Human {
+    fn fly(&self) {
+        println!("This is your captain speaking.");
+    }
+}
+
+impl Wizard for Human {
+    fn fly(&self) {
+        println!("Up!");
+    }
+}
+
+impl Human {
+    fn fly(&self) {
+        println!("*waving arms furiously*");
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-17/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-17/src/main.rs
new file mode 100644
index 000000000..3df65a7ce
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-17/src/main.rs
@@ -0,0 +1,34 @@
+trait Pilot {
+    fn fly(&self);
+}
+
+trait Wizard {
+    fn fly(&self);
+}
+
+struct Human;
+
+impl Pilot for Human {
+    fn fly(&self) {
+        println!("This is your captain speaking.");
+    }
+}
+
+impl Wizard for Human {
+    fn fly(&self) {
+        println!("Up!");
+    }
+}
+
+impl Human {
+    fn fly(&self) {
+        println!("*waving arms furiously*");
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let person = Human;
+    person.fly();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-18/output.txt b/src/doc/book/listings/ch19-advanced-features/listing-19-18/output.txt
new file mode 100644
index 000000000..2e9da17d6
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-18/output.txt
@@ -0,0 +1,7 @@
+$ cargo run
+   Compiling traits-example v0.1.0 (file:///projects/traits-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.46s
+     Running `target/debug/traits-example`
+This is your captain speaking.
+Up!
+*waving arms furiously*
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-18/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-18/src/main.rs
new file mode 100644
index 000000000..fa01c09cc
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-18/src/main.rs
@@ -0,0 +1,36 @@
+trait Pilot {
+    fn fly(&self);
+}
+
+trait Wizard {
+    fn fly(&self);
+}
+
+struct Human;
+
+impl Pilot for Human {
+    fn fly(&self) {
+        println!("This is your captain speaking.");
+    }
+}
+
+impl Wizard for Human {
+    fn fly(&self) {
+        println!("Up!");
+    }
+}
+
+impl Human {
+    fn fly(&self) {
+        println!("*waving arms furiously*");
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    let person = Human;
+    Pilot::fly(&person);
+    Wizard::fly(&person);
+    person.fly();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-19/output.txt b/src/doc/book/listings/ch19-advanced-features/listing-19-19/output.txt
new file mode 100644
index 000000000..087e802b1
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-19/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling traits-example v0.1.0 (file:///projects/traits-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.54s
+     Running `target/debug/traits-example`
+A baby dog is called a Spot
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-19/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-19/src/main.rs
new file mode 100644
index 000000000..44affe0ee
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-19/src/main.rs
@@ -0,0 +1,21 @@
+trait Animal {
+    fn baby_name() -> String;
+}
+
+struct Dog;
+
+impl Dog {
+    fn baby_name() -> String {
+        String::from("Spot")
+    }
+}
+
+impl Animal for Dog {
+    fn baby_name() -> String {
+        String::from("puppy")
+    }
+}
+
+fn main() {
+    println!("A baby dog is called a {}", Dog::baby_name());
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-20/output.txt b/src/doc/book/listings/ch19-advanced-features/listing-19-20/output.txt
new file mode 100644
index 000000000..684508245
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-20/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling traits-example v0.1.0 (file:///projects/traits-example)
+error[E0283]: type annotations needed
+  --> src/main.rs:20:43
+   |
+20 |     println!("A baby dog is called a {}", Animal::baby_name());
+   |                                           ^^^^^^^^^^^^^^^^^ cannot infer type
+   |
+   = note: cannot satisfy `_: Animal`
+
+For more information about this error, try `rustc --explain E0283`.
+error: could not compile `traits-example` due to previous error
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-20/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-20/src/main.rs
new file mode 100644
index 000000000..8e295c9b6
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-20/src/main.rs
@@ -0,0 +1,23 @@
+trait Animal {
+    fn baby_name() -> String;
+}
+
+struct Dog;
+
+impl Dog {
+    fn baby_name() -> String {
+        String::from("Spot")
+    }
+}
+
+impl Animal for Dog {
+    fn baby_name() -> String {
+        String::from("puppy")
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    println!("A baby dog is called a {}", Animal::baby_name());
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-21/output.txt b/src/doc/book/listings/ch19-advanced-features/listing-19-21/output.txt
new file mode 100644
index 000000000..4d1ee5ab4
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-21/output.txt
@@ -0,0 +1,5 @@
+$ cargo run
+   Compiling traits-example v0.1.0 (file:///projects/traits-example)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
+     Running `target/debug/traits-example`
+A baby dog is called a puppy
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-21/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-21/src/main.rs
new file mode 100644
index 000000000..b1df72895
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-21/src/main.rs
@@ -0,0 +1,23 @@
+trait Animal {
+    fn baby_name() -> String;
+}
+
+struct Dog;
+
+impl Dog {
+    fn baby_name() -> String {
+        String::from("Spot")
+    }
+}
+
+impl Animal for Dog {
+    fn baby_name() -> String {
+        String::from("puppy")
+    }
+}
+
+// ANCHOR: here
+fn main() {
+    println!("A baby dog is called a {}", <Dog as Animal>::baby_name());
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs
new file mode 100644
index 000000000..febe58b0c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs
@@ -0,0 +1,17 @@
+// ANCHOR: here
+use std::fmt;
+
+trait OutlinePrint: fmt::Display {
+    fn outline_print(&self) {
+        let output = self.to_string();
+        let len = output.len();
+        println!("{}", "*".repeat(len + 4));
+        println!("*{}*", " ".repeat(len + 2));
+        println!("* {} *", output);
+        println!("*{}*", " ".repeat(len + 2));
+        println!("{}", "*".repeat(len + 4));
+    }
+}
+// ANCHOR_END: here
+
+fn main() {}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-23/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-23/src/main.rs
new file mode 100644
index 000000000..eae46c92f
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-23/src/main.rs
@@ -0,0 +1,14 @@
+use std::fmt;
+
+struct Wrapper(Vec<String>);
+
+impl fmt::Display for Wrapper {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "[{}]", self.0.join(", "))
+    }
+}
+
+fn main() {
+    let w = Wrapper(vec![String::from("hello"), String::from("world")]);
+    println!("w = {}", w);
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-24/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-24/src/main.rs
new file mode 100644
index 000000000..d604ae8d6
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-24/src/main.rs
@@ -0,0 +1,16 @@
+fn main() {
+    // ANCHOR: here
+    let f: Box<dyn Fn() + Send + 'static> = Box::new(|| println!("hi"));
+
+    fn takes_long_type(f: Box<dyn Fn() + Send + 'static>) {
+        // --snip--
+    }
+
+    fn returns_long_type() -> Box<dyn Fn() + Send + 'static> {
+        // --snip--
+        // ANCHOR_END: here
+        Box::new(|| ())
+        // ANCHOR: here
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-25/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-25/src/main.rs
new file mode 100644
index 000000000..af35bed2c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-25/src/main.rs
@@ -0,0 +1,18 @@
+fn main() {
+    // ANCHOR: here
+    type Thunk = Box<dyn Fn() + Send + 'static>;
+
+    let f: Thunk = Box::new(|| println!("hi"));
+
+    fn takes_long_type(f: Thunk) {
+        // --snip--
+    }
+
+    fn returns_long_type() -> Thunk {
+        // --snip--
+        // ANCHOR_END: here
+        Box::new(|| ())
+        // ANCHOR: here
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-27/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-27/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-27/src/main.rs
new file mode 100644
index 000000000..91b2cf04b
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-27/src/main.rs
@@ -0,0 +1,13 @@
+fn add_one(x: i32) -> i32 {
+    x + 1
+}
+
+fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
+    f(arg) + f(arg)
+}
+
+fn main() {
+    let answer = do_twice(add_one, 5);
+
+    println!("The answer is: {}", answer);
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.lock
new file mode 100644
index 000000000..b2d925754
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "macros-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.toml
new file mode 100644
index 000000000..9218091c8
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-28/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "macros-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-28/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-28/src/lib.rs
new file mode 100644
index 000000000..7c7c4756c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-28/src/lib.rs
@@ -0,0 +1,12 @@
+#[macro_export]
+macro_rules! vec {
+    ( $( $x:expr ),* ) => {
+        {
+            let mut temp_vec = Vec::new();
+            $(
+                temp_vec.push($x);
+            )*
+            temp_vec
+        }
+    };
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.lock
new file mode 100644
index 000000000..39afcf282
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.toml
new file mode 100644
index 000000000..c6fb92087
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-30/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello_macro"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-30/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-30/src/main.rs
new file mode 100644
index 000000000..468c30aa4
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-30/src/main.rs
@@ -0,0 +1,9 @@
+use hello_macro::HelloMacro;
+use hello_macro_derive::HelloMacro;
+
+#[derive(HelloMacro)]
+struct Pancakes;
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.lock
new file mode 100644
index 000000000..39afcf282
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.toml
new file mode 100644
index 000000000..c6fb92087
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello_macro"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock
new file mode 100644
index 000000000..9a38c8ac2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.lock
@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro_derive"
+version = "0.1.0"
+dependencies = [
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml
new file mode 100644
index 000000000..aa076ac48
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "hello_macro_derive"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = "1.0"
+quote = "1.0"
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs
new file mode 100644
index 000000000..11643a8d6
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs
@@ -0,0 +1,13 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn;
+
+#[proc_macro_derive(HelloMacro)]
+pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
+    // Construct a representation of Rust code as a syntax tree
+    // that we can manipulate
+    let ast = syn::parse(input).unwrap();
+
+    // Build the trait implementation
+    impl_hello_macro(&ast)
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/lib.rs
new file mode 100644
index 000000000..e74793184
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait HelloMacro {
+    fn hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/main.rs
new file mode 100644
index 000000000..10b028b2d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-31/hello_macro/src/main.rs
@@ -0,0 +1,13 @@
+use hello_macro::HelloMacro;
+
+struct Pancakes;
+
+impl HelloMacro for Pancakes {
+    fn hello_macro() {
+        println!("Hello, Macro! My name is Pancakes!");
+    }
+}
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.lock
new file mode 100644
index 000000000..39afcf282
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.toml
new file mode 100644
index 000000000..c6fb92087
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello_macro"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock
new file mode 100644
index 000000000..9a38c8ac2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.lock
@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro_derive"
+version = "0.1.0"
+dependencies = [
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml
new file mode 100644
index 000000000..aa076ac48
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "hello_macro_derive"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = "1.0"
+quote = "1.0"
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs
new file mode 100644
index 000000000..dac6c98f6
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs
@@ -0,0 +1,27 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn;
+
+#[proc_macro_derive(HelloMacro)]
+pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
+    // Construct a representation of Rust code as a syntax tree
+    // that we can manipulate
+    let ast = syn::parse(input).unwrap();
+
+    // Build the trait implementation
+    impl_hello_macro(&ast)
+}
+
+// ANCHOR: here
+fn impl_hello_macro(ast: &syn::DeriveInput) -> TokenStream {
+    let name = &ast.ident;
+    let gen = quote! {
+        impl HelloMacro for #name {
+            fn hello_macro() {
+                println!("Hello, Macro! My name is {}!", stringify!(#name));
+            }
+        }
+    };
+    gen.into()
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/lib.rs
new file mode 100644
index 000000000..e74793184
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait HelloMacro {
+    fn hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/main.rs
new file mode 100644
index 000000000..10b028b2d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/listing-19-33/hello_macro/src/main.rs
@@ -0,0 +1,13 @@
+use hello_macro::HelloMacro;
+
+struct Pancakes;
+
+impl HelloMacro for Pancakes {
+    fn hello_macro() {
+        println!("Hello, Macro! My name is Pancakes!");
+    }
+}
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/src/main.rs
new file mode 100644
index 000000000..21ecdbe5a
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-01-unsafe-fn/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    unsafe fn dangerous() {}
+
+    unsafe {
+        dangerous();
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt
new file mode 100644
index 000000000..0991f10fa
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/output.txt
@@ -0,0 +1,18 @@
+$ cargo run
+   Compiling traits-example v0.1.0 (file:///projects/traits-example)
+error[E0277]: `Point` doesn't implement `std::fmt::Display`
+  --> src/main.rs:20:6
+   |
+20 | impl OutlinePrint for Point {}
+   |      ^^^^^^^^^^^^ `Point` cannot be formatted with the default formatter
+   |
+   = help: the trait `std::fmt::Display` is not implemented for `Point`
+   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
+note: required by a bound in `OutlinePrint`
+  --> src/main.rs:3:21
+   |
+3  | trait OutlinePrint: fmt::Display {
+   |                     ^^^^^^^^^^^^ required by this bound in `OutlinePrint`
+
+For more information about this error, try `rustc --explain E0277`.
+error: could not compile `traits-example` due to previous error
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs
new file mode 100644
index 000000000..a1e2fe4c4
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-02-impl-outlineprint-for-point/src/main.rs
@@ -0,0 +1,27 @@
+use std::fmt;
+
+trait OutlinePrint: fmt::Display {
+    fn outline_print(&self) {
+        let output = self.to_string();
+        let len = output.len();
+        println!("{}", "*".repeat(len + 4));
+        println!("*{}*", " ".repeat(len + 2));
+        println!("* {} *", output);
+        println!("*{}*", " ".repeat(len + 2));
+        println!("{}", "*".repeat(len + 4));
+    }
+}
+
+// ANCHOR: here
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+impl OutlinePrint for Point {}
+// ANCHOR_END: here
+
+fn main() {
+    let p = Point { x: 1, y: 3 };
+    p.outline_print();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs
new file mode 100644
index 000000000..c7bbb6a70
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-03-impl-display-for-point/src/main.rs
@@ -0,0 +1,33 @@
+trait OutlinePrint: fmt::Display {
+    fn outline_print(&self) {
+        let output = self.to_string();
+        let len = output.len();
+        println!("{}", "*".repeat(len + 4));
+        println!("*{}*", " ".repeat(len + 2));
+        println!("* {} *", output);
+        println!("*{}*", " ".repeat(len + 2));
+        println!("{}", "*".repeat(len + 4));
+    }
+}
+
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+impl OutlinePrint for Point {}
+
+// ANCHOR: here
+use std::fmt;
+
+impl fmt::Display for Point {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "({}, {})", self.x, self.y)
+    }
+}
+// ANCHOR_END: here
+
+fn main() {
+    let p = Point { x: 1, y: 3 };
+    p.outline_print();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/src/main.rs
new file mode 100644
index 000000000..d3fe32e2f
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-04-kilometers-alias/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    // ANCHOR: there
+    // ANCHOR: here
+    type Kilometers = i32;
+    // ANCHOR_END: here
+
+    let x: i32 = 5;
+    let y: Kilometers = 5;
+
+    println!("x + y = {}", x + y);
+    // ANCHOR_END: there
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/src/lib.rs
new file mode 100644
index 000000000..8300dccee
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-05-write-trait/src/lib.rs
@@ -0,0 +1,10 @@
+use std::fmt;
+use std::io::Error;
+
+pub trait Write {
+    fn write(&mut self, buf: &[u8]) -> Result<usize, Error>;
+    fn flush(&mut self) -> Result<(), Error>;
+
+    fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>;
+    fn write_fmt(&mut self, fmt: fmt::Arguments) -> Result<(), Error>;
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/src/lib.rs
new file mode 100644
index 000000000..573559934
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-06-result-alias/src/lib.rs
@@ -0,0 +1,15 @@
+use std::fmt;
+
+// ANCHOR: here
+type Result<T> = std::result::Result<T, std::io::Error>;
+// ANCHOR_END: here
+
+// ANCHOR: there
+pub trait Write {
+    fn write(&mut self, buf: &[u8]) -> Result<usize>;
+    fn flush(&mut self) -> Result<()>;
+
+    fn write_all(&mut self, buf: &[u8]) -> Result<()>;
+    fn write_fmt(&mut self, fmt: fmt::Arguments) -> Result<()>;
+}
+// ANCHOR_END: there
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.lock
new file mode 100644
index 000000000..b1977d01e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "traits-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.toml
new file mode 100644
index 000000000..52395a587
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "traits-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/src/lib.rs
new file mode 100644
index 000000000..f0f7acac2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-07-never-type/src/lib.rs
@@ -0,0 +1,8 @@
+// ANCHOR: here
+fn bar() -> ! {
+    // --snip--
+    // ANCHOR_END: here
+    panic!();
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/src/main.rs
new file mode 100644
index 000000000..6d56008ad
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-08-match-arms-different-types/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let guess = "3";
+    // ANCHOR: here
+    let guess = match guess.trim().parse() {
+        Ok(_) => 5,
+        Err(_) => "hello",
+    };
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/src/lib.rs
new file mode 100644
index 000000000..aa4f937ff
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-09-unwrap-definition/src/lib.rs
@@ -0,0 +1,17 @@
+enum Option<T> {
+    Some(T),
+    None,
+}
+
+use crate::Option::*;
+
+// ANCHOR: here
+impl<T> Option<T> {
+    pub fn unwrap(self) -> T {
+        match self {
+            Some(val) => val,
+            None => panic!("called `Option::unwrap()` on a `None` value"),
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/src/main.rs
new file mode 100644
index 000000000..e7768913b
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-10-loop-returns-never/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    // ANCHOR: here
+    print!("forever ");
+
+    loop {
+        print!("and ever ");
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/src/main.rs
new file mode 100644
index 000000000..075d5110c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-11-cant-create-str/src/main.rs
@@ -0,0 +1,6 @@
+fn main() {
+    // ANCHOR: here
+    let s1: str = "Hello there!";
+    let s2: str = "How's it going?";
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/src/lib.rs
new file mode 100644
index 000000000..69186ddfb
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-12-generic-fn-definition/src/lib.rs
@@ -0,0 +1,3 @@
+fn generic<T>(t: T) {
+    // --snip--
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/src/lib.rs
new file mode 100644
index 000000000..c2d00e216
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-13-generic-implicit-sized-bound/src/lib.rs
@@ -0,0 +1,3 @@
+fn generic<T: Sized>(t: T) {
+    // --snip--
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.lock
new file mode 100644
index 000000000..c0c98a79c
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "types-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.toml
new file mode 100644
index 000000000..a2ae20c77
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "types-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/src/lib.rs
new file mode 100644
index 000000000..e4722267a
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-14-generic-maybe-sized/src/lib.rs
@@ -0,0 +1,3 @@
+fn generic<T: ?Sized>(t: &T) {
+    // --snip--
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs
new file mode 100644
index 000000000..b4fcf7eb8
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    let list_of_numbers = vec![1, 2, 3];
+    let list_of_strings: Vec<String> =
+        list_of_numbers.iter().map(|i| i.to_string()).collect();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/src/main.rs
new file mode 100644
index 000000000..dff20fe71
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-16-map-function/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    let list_of_numbers = vec![1, 2, 3];
+    let list_of_strings: Vec<String> =
+        list_of_numbers.iter().map(ToString::to_string).collect();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/src/main.rs
new file mode 100644
index 000000000..60fb73005
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-17-map-initializer/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    // ANCHOR: here
+    enum Status {
+        Value(u32),
+        Stop,
+    }
+
+    let list_of_statuses: Vec<Status> = (0u32..20).map(Status::Value).collect();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt
new file mode 100644
index 000000000..d6fffc967
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt
@@ -0,0 +1,16 @@
+$ cargo build
+   Compiling functions-example v0.1.0 (file:///projects/functions-example)
+error[E0746]: return type cannot have an unboxed trait object
+ --> src/lib.rs:1:25
+  |
+1 | fn returns_closure() -> dyn Fn(i32) -> i32 {
+  |                         ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+  |
+  = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
+help: use `impl Fn(i32) -> i32` as the return type, as all return paths are of type `[closure@src/lib.rs:2:5: 2:14]`, which implements `Fn(i32) -> i32`
+  |
+1 | fn returns_closure() -> impl Fn(i32) -> i32 {
+  |                         ~~~~~~~~~~~~~~~~~~~
+
+For more information about this error, try `rustc --explain E0746`.
+error: could not compile `functions-example` due to previous error
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/src/lib.rs
new file mode 100644
index 000000000..d699ac34e
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/src/lib.rs
@@ -0,0 +1,3 @@
+fn returns_closure() -> dyn Fn(i32) -> i32 {
+    |x| x + 1
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.lock
new file mode 100644
index 000000000..b2327c755
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "functions-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.toml
new file mode 100644
index 000000000..b196f35b5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "functions-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/src/lib.rs
new file mode 100644
index 000000000..b11407747
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-19-returns-closure-trait-object/src/lib.rs
@@ -0,0 +1,3 @@
+fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
+    Box::new(|x| x + 1)
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.lock
new file mode 100644
index 000000000..39afcf282
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.toml
new file mode 100644
index 000000000..c6fb92087
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello_macro"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/src/lib.rs
new file mode 100644
index 000000000..e74793184
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/hello_macro/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait HelloMacro {
+    fn hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.lock
new file mode 100644
index 000000000..881cd3f6d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
+[[package]]
+name = "pancakes"
+version = "0.1.0"
+dependencies = [
+ "hello_macro 0.1.0",
+]
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.toml
new file mode 100644
index 000000000..3ad910862
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "pancakes"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+hello_macro = { path = "../hello_macro" }
\ No newline at end of file
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/src/main.rs
new file mode 100644
index 000000000..10b028b2d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-20-impl-hellomacro-for-pancakes/pancakes/src/main.rs
@@ -0,0 +1,13 @@
+use hello_macro::HelloMacro;
+
+struct Pancakes;
+
+impl HelloMacro for Pancakes {
+    fn hello_macro() {
+        println!("Hello, Macro! My name is Pancakes!");
+    }
+}
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.lock
new file mode 100644
index 000000000..39afcf282
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.toml
new file mode 100644
index 000000000..c6fb92087
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello_macro"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock
new file mode 100644
index 000000000..9a38c8ac2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.lock
@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro_derive"
+version = "0.1.0"
+dependencies = [
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml
new file mode 100644
index 000000000..aa076ac48
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "hello_macro_derive"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = "1.0"
+quote = "1.0"
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs
new file mode 100644
index 000000000..5e0b96c27
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs
@@ -0,0 +1,25 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn;
+
+#[proc_macro_derive(HelloMacro)]
+pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
+    // Construct a representation of Rust code as a syntax tree
+    // that we can manipulate
+    let ast = syn::parse(input).unwrap();
+
+    // Build the trait implementation
+    impl_hello_macro(&ast)
+}
+
+fn impl_hello_macro(ast: &syn::DeriveInput) -> TokenStream {
+    let name = &ast.ident;
+    let gen = quote! {
+        impl HelloMacro for #name {
+            fn hello_macro() {
+                println!("Hello, Macro! My name is {}!", stringify!(#name));
+            }
+        }
+    };
+    gen.into()
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/lib.rs
new file mode 100644
index 000000000..e74793184
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/lib.rs
@@ -0,0 +1,3 @@
+pub trait HelloMacro {
+    fn hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/main.rs
new file mode 100644
index 000000000..10b028b2d
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/src/main.rs
@@ -0,0 +1,13 @@
+use hello_macro::HelloMacro;
+
+struct Pancakes;
+
+impl HelloMacro for Pancakes {
+    fn hello_macro() {
+        println!("Hello, Macro! My name is Pancakes!");
+    }
+}
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock
new file mode 100644
index 000000000..dee23ecf9
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.lock
@@ -0,0 +1,58 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello_macro"
+version = "0.1.0"
+
+[[package]]
+name = "hello_macro_derive"
+version = "0.1.0"
+dependencies = [
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pancakes"
+version = "0.1.0"
+dependencies = [
+ "hello_macro 0.1.0",
+ "hello_macro_derive 0.1.0",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3acb317c6ff86a4e579dfa00fc5e6cca91ecbb4e7eb2df0468805b674eb88548"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
+"checksum syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "af6f3550d8dff9ef7dc34d384ac6f107e5d31c8f57d9f28e0081503f547ac8f5"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.toml
new file mode 100644
index 000000000..cb3a98c3a
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "pancakes"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+hello_macro = { path = "../hello_macro" }
+hello_macro_derive = { path = "../hello_macro/hello_macro_derive" }
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/src/main.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/src/main.rs
new file mode 100644
index 000000000..468c30aa4
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-21-pancakes/pancakes/src/main.rs
@@ -0,0 +1,9 @@
+use hello_macro::HelloMacro;
+use hello_macro_derive::HelloMacro;
+
+#[derive(HelloMacro)]
+struct Pancakes;
+
+fn main() {
+    Pancakes::hello_macro();
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.lock
new file mode 100644
index 000000000..58b70c5b7
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "counter"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.toml
new file mode 100644
index 000000000..9e103f3eb
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "counter"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/src/lib.rs b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/src/lib.rs
new file mode 100644
index 000000000..04c7f38f5
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/no-listing-22-iterator-on-counter/src/lib.rs
@@ -0,0 +1,25 @@
+struct Counter {
+    count: u32,
+}
+
+impl Counter {
+    fn new() -> Counter {
+        Counter { count: 0 }
+    }
+}
+
+// ANCHOR: ch19
+impl Iterator for Counter {
+    type Item = u32;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        // --snip--
+        // ANCHOR_END: ch19
+        if self.count < 5 {
+            self.count += 1;
+            Some(self.count)
+        } else {
+            None
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.lock
new file mode 100644
index 000000000..497817bf2
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "unsafe-example"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.toml
new file mode 100644
index 000000000..3e8a29201
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "unsafe-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt
new file mode 100644
index 000000000..5886bc630
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/output.txt
@@ -0,0 +1,12 @@
+$ cargo run
+   Compiling unsafe-example v0.1.0 (file:///projects/unsafe-example)
+error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
+ --> src/main.rs:4:5
+  |
+4 |     dangerous();
+  |     ^^^^^^^^^^^ call to unsafe function
+  |
+  = note: consult the function's documentation for information on how to avoid undefined behavior
+
+For more information about this error, try `rustc --explain E0133`.
+error: could not compile `unsafe-example` due to previous error
diff --git a/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/src/main.rs b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/src/main.rs
new file mode 100644
index 000000000..01305be74
--- /dev/null
+++ b/src/doc/book/listings/ch19-advanced-features/output-only-01-missing-unsafe/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    // ANCHOR: here
+    unsafe fn dangerous() {}
+
+    dangerous();
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-01/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-01/src/main.rs
new file mode 100644
index 000000000..d868c3ec1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-01/src/main.rs
@@ -0,0 +1,11 @@
+use std::net::TcpListener;
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        println!("Connection established!");
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-02/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-02/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-02/src/main.rs
new file mode 100644
index 000000000..7240c73c7
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-02/src/main.rs
@@ -0,0 +1,25 @@
+use std::{
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let http_request: Vec<_> = buf_reader
+        .lines()
+        .map(|result| result.unwrap())
+        .take_while(|line| !line.is_empty())
+        .collect();
+
+    println!("Request: {:#?}", http_request);
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-03/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-03/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-03/src/main.rs
new file mode 100644
index 000000000..c72d4a9c6
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-03/src/main.rs
@@ -0,0 +1,29 @@
+use std::{
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+
+// ANCHOR: here
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let http_request: Vec<_> = buf_reader
+        .lines()
+        .map(|result| result.unwrap())
+        .take_while(|line| !line.is_empty())
+        .collect();
+
+    let response = "HTTP/1.1 200 OK\r\n\r\n";
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-05/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-05/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-05/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-05/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-05/src/main.rs
new file mode 100644
index 000000000..d4b78b640
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-05/src/main.rs
@@ -0,0 +1,38 @@
+// ANCHOR: here
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+// --snip--
+
+// ANCHOR_END: here
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+
+// ANCHOR: here
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let http_request: Vec<_> = buf_reader
+        .lines()
+        .map(|result| result.unwrap())
+        .take_while(|line| !line.is_empty())
+        .collect();
+
+    let status_line = "HTTP/1.1 200 OK";
+    let contents = fs::read_to_string("hello.html").unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-06/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-06/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-06/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-06/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-06/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-06/src/main.rs
new file mode 100644
index 000000000..5523a42d7
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-06/src/main.rs
@@ -0,0 +1,37 @@
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+// ANCHOR: here
+// --snip--
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    if request_line == "GET / HTTP/1.1" {
+        let status_line = "HTTP/1.1 200 OK";
+        let contents = fs::read_to_string("hello.html").unwrap();
+        let length = contents.len();
+
+        let response = format!(
+            "{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}"
+        );
+
+        stream.write_all(response.as_bytes()).unwrap();
+    } else {
+        // some other request
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-07/404.html b/src/doc/book/listings/ch20-web-server/listing-20-07/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-07/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-07/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-07/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-07/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-07/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-07/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-07/src/main.rs
new file mode 100644
index 000000000..a14b7d538
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-07/src/main.rs
@@ -0,0 +1,45 @@
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    if request_line == "GET / HTTP/1.1" {
+        let status_line = "HTTP/1.1 200 OK";
+        let contents = fs::read_to_string("hello.html").unwrap();
+        let length = contents.len();
+
+        let response = format!(
+            "{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}"
+        );
+
+        stream.write_all(response.as_bytes()).unwrap();
+    // ANCHOR: here
+    // --snip--
+    } else {
+        let status_line = "HTTP/1.1 404 NOT FOUND";
+        let contents = fs::read_to_string("404.html").unwrap();
+        let length = contents.len();
+
+        let response = format!(
+            "{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}"
+        );
+
+        stream.write_all(response.as_bytes()).unwrap();
+    }
+    // ANCHOR_END: here
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-09/404.html b/src/doc/book/listings/ch20-web-server/listing-20-09/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-09/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-09/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-09/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-09/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-09/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-09/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-09/src/main.rs
new file mode 100644
index 000000000..ffc51e803
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-09/src/main.rs
@@ -0,0 +1,40 @@
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+// ANCHOR: here
+// --snip--
+
+fn handle_connection(mut stream: TcpStream) {
+    // --snip--
+    // ANCHOR_END: here
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+    // ANCHOR: here
+
+    let (status_line, filename) = if request_line == "GET / HTTP/1.1" {
+        ("HTTP/1.1 200 OK", "hello.html")
+    } else {
+        ("HTTP/1.1 404 NOT FOUND", "404.html")
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-10/404.html b/src/doc/book/listings/ch20-web-server/listing-20-10/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-10/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-10/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-10/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-10/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-10/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-10/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-10/src/main.rs
new file mode 100644
index 000000000..5a18b45c0
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-10/src/main.rs
@@ -0,0 +1,52 @@
+// ANCHOR: here
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+// --snip--
+// ANCHOR_END: here
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+// ANCHOR: here
+
+fn handle_connection(mut stream: TcpStream) {
+    // --snip--
+
+    // ANCHOR_END: here
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    // ANCHOR: here
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    // --snip--
+    // ANCHOR_END: here
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-11/404.html b/src/doc/book/listings/ch20-web-server/listing-20-11/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-11/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-11/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-11/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-11/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-11/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-11/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-11/src/main.rs
new file mode 100644
index 000000000..1181357b0
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-11/src/main.rs
@@ -0,0 +1,43 @@
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+// ANCHOR: here
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        thread::spawn(|| {
+            handle_connection(stream);
+        });
+    }
+}
+// ANCHOR_END: here
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/404.html b/src/doc/book/listings/ch20-web-server/listing-20-12/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-12/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/output.txt b/src/doc/book/listings/ch20-web-server/listing-20-12/output.txt
new file mode 100644
index 000000000..57a58b960
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/output.txt
@@ -0,0 +1,10 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0433]: failed to resolve: use of undeclared type `ThreadPool`
+  --> src/main.rs:11:16
+   |
+11 |     let pool = ThreadPool::new(4);
+   |                ^^^^^^^^^^ use of undeclared type `ThreadPool`
+
+For more information about this error, try `rustc --explain E0433`.
+error: could not compile `hello` due to previous error
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-12/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-12/src/main.rs
new file mode 100644
index 000000000..21b9a80f1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-12/src/main.rs
@@ -0,0 +1,44 @@
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+// ANCHOR: here
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+// ANCHOR_END: here
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/404.html b/src/doc/book/listings/ch20-web-server/listing-20-13/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-13/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-13/src/lib.rs
new file mode 100644
index 000000000..35960e7c0
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/src/lib.rs
@@ -0,0 +1,27 @@
+pub struct ThreadPool;
+
+// ANCHOR: here
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        ThreadPool
+    }
+
+    // --snip--
+    // ANCHOR_END: here
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-13/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-13/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-13/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/404.html b/src/doc/book/listings/ch20-web-server/listing-20-14/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-14/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-14/src/lib.rs
new file mode 100644
index 000000000..c1fa1828b
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/src/lib.rs
@@ -0,0 +1,40 @@
+// ANCHOR: here
+use std::thread;
+
+pub struct ThreadPool {
+    threads: Vec<thread::JoinHandle<()>>,
+}
+
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let mut threads = Vec::with_capacity(size);
+
+        for _ in 0..size {
+            // create some threads and store them in the vector
+        }
+
+        ThreadPool { threads }
+    }
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-14/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-14/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-14/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/404.html b/src/doc/book/listings/ch20-web-server/listing-20-15/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-15/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-15/src/lib.rs
new file mode 100644
index 000000000..80a6eeeb3
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/src/lib.rs
@@ -0,0 +1,53 @@
+// ANCHOR: here
+use std::thread;
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+}
+
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id));
+        }
+
+        ThreadPool { workers }
+    }
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(id: usize) -> Worker {
+        let thread = thread::spawn(|| {});
+
+        Worker { id, thread }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-15/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-15/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-15/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/404.html b/src/doc/book/listings/ch20-web-server/listing-20-16/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-16/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-16/src/lib.rs
new file mode 100644
index 000000000..411c1d003
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/src/lib.rs
@@ -0,0 +1,58 @@
+// ANCHOR: here
+use std::{sync::mpsc, thread};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+struct Job;
+
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id));
+        }
+
+        ThreadPool { workers, sender }
+    }
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(id: usize) -> Worker {
+        let thread = thread::spawn(|| {});
+
+        Worker { id, thread }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-16/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-16/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-16/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/404.html b/src/doc/book/listings/ch20-web-server/listing-20-17/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-17/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/output.txt b/src/doc/book/listings/ch20-web-server/listing-20-17/output.txt
new file mode 100644
index 000000000..8bedfecfd
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/output.txt
@@ -0,0 +1,13 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0382]: use of moved value: `receiver`
+  --> src/lib.rs:26:42
+   |
+21 |         let (sender, receiver) = mpsc::channel();
+   |                      -------- move occurs because `receiver` has type `std::sync::mpsc::Receiver<Job>`, which does not implement the `Copy` trait
+...
+26 |             workers.push(Worker::new(id, receiver));
+   |                                          ^^^^^^^^ value moved here, in previous iteration of loop
+
+For more information about this error, try `rustc --explain E0382`.
+error: could not compile `hello` due to previous error
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-17/src/lib.rs
new file mode 100644
index 000000000..d764879e5
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/src/lib.rs
@@ -0,0 +1,65 @@
+use std::{sync::mpsc, thread};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+struct Job;
+
+// ANCHOR: here
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, receiver));
+        }
+
+        ThreadPool { workers, sender }
+    }
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+
+// --snip--
+
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+// ANCHOR: here
+impl Worker {
+    fn new(id: usize, receiver: mpsc::Receiver<Job>) -> Worker {
+        let thread = thread::spawn(|| {
+            receiver;
+        });
+
+        Worker { id, thread }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-17/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-17/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-17/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/404.html b/src/doc/book/listings/ch20-web-server/listing-20-18/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-18/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-18/src/lib.rs
new file mode 100644
index 000000000..4bff8acad
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/src/lib.rs
@@ -0,0 +1,76 @@
+// ANCHOR: here
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+// --snip--
+
+// ANCHOR_END: here
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+struct Job;
+
+// ANCHOR: here
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    // --snip--
+    // ANCHOR_END: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+    // ANCHOR: here
+}
+
+// --snip--
+
+// ANCHOR_END: here
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+// ANCHOR: here
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        // --snip--
+        // ANCHOR_END: here
+        let thread = thread::spawn(|| {
+            receiver;
+        });
+
+        Worker { id, thread }
+        // ANCHOR: here
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-18/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-18/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-18/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/404.html b/src/doc/book/listings/ch20-web-server/listing-20-19/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-19/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-19/src/lib.rs
new file mode 100644
index 000000000..aeb1facd6
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/src/lib.rs
@@ -0,0 +1,69 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+// ANCHOR: here
+// --snip--
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+    // ANCHOR: here
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+// --snip--
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(|| {
+            receiver;
+        });
+
+        Worker { id, thread }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-19/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-19/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-19/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/404.html b/src/doc/book/listings/ch20-web-server/listing-20-20/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-20/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-20/src/lib.rs
new file mode 100644
index 000000000..86157c9e7
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/src/lib.rs
@@ -0,0 +1,68 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+// ANCHOR: here
+// --snip--
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        Worker { id, thread }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-20/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-20/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-20/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/404.html b/src/doc/book/listings/ch20-web-server/listing-20-21/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-21/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-21/src/lib.rs
new file mode 100644
index 000000000..17b37e77b
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/src/lib.rs
@@ -0,0 +1,67 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+// ANCHOR: here
+// --snip--
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || {
+            while let Ok(job) = receiver.lock().unwrap().recv() {
+                println!("Worker {id} got a job; executing.");
+
+                job();
+            }
+        });
+
+        Worker { id, thread }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-21/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-21/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-21/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/404.html b/src/doc/book/listings/ch20-web-server/listing-20-22/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-22/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/output.txt b/src/doc/book/listings/ch20-web-server/listing-20-22/output.txt
new file mode 100644
index 000000000..4402092e9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/output.txt
@@ -0,0 +1,14 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0507]: cannot move out of `worker.thread` which is behind a mutable reference
+    --> src/lib.rs:52:13
+     |
+52   |             worker.thread.join().unwrap();
+     |             ^^^^^^^^^^^^^ ------ `worker.thread` moved due to this method call
+     |             |
+     |             move occurs because `worker.thread` has type `JoinHandle<()>`, which does not implement the `Copy` trait
+     |
+note: this function takes ownership of the receiver `self`, which moves `worker.thread`
+
+For more information about this error, try `rustc --explain E0507`.
+error: could not compile `hello` due to previous error
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-22/src/lib.rs
new file mode 100644
index 000000000..72a8c4808
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/src/lib.rs
@@ -0,0 +1,76 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+// ANCHOR: here
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            worker.thread.join().unwrap();
+        }
+    }
+}
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        Worker { id, thread }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-22/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-22/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-22/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/404.html b/src/doc/book/listings/ch20-web-server/listing-20-23/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-23/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-23/src/lib.rs
new file mode 100644
index 000000000..eea339b02
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/src/lib.rs
@@ -0,0 +1,95 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+// ANCHOR: here
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: Option<mpsc::Sender<Job>>,
+}
+// --snip--
+// ANCHOR_END: here
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+// ANCHOR: here
+impl ThreadPool {
+    // ANCHOR_END: here
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    // ANCHOR: here
+    pub fn new(size: usize) -> ThreadPool {
+        // --snip--
+
+        // ANCHOR_END: here
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        // ANCHOR: here
+        ThreadPool {
+            workers,
+            sender: Some(sender),
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.as_ref().unwrap().send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        drop(self.sender.take());
+
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            if let Some(thread) = worker.thread.take() {
+                thread.join().unwrap();
+            }
+        }
+    }
+}
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-23/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-23/src/main.rs
new file mode 100644
index 000000000..b6aa046d1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-23/src/main.rs
@@ -0,0 +1,45 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming().take(2) {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+
+    println!("Shutting down.");
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/404.html b/src/doc/book/listings/ch20-web-server/listing-20-24/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-24/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-24/src/lib.rs
new file mode 100644
index 000000000..55e8fef8f
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/src/lib.rs
@@ -0,0 +1,92 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: Option<mpsc::Sender<Job>>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool {
+            workers,
+            sender: Some(sender),
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.as_ref().unwrap().send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        drop(self.sender.take());
+
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            if let Some(thread) = worker.thread.take() {
+                thread.join().unwrap();
+            }
+        }
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+// ANCHOR: here
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            match receiver.lock().unwrap().recv() {
+                Ok(job) => {
+                    println!("Worker {id} got a job; executing.");
+
+                    job();
+                }
+                Err(_) => {
+                    println!("Worker {id} disconnected; shutting down.");
+                    break;
+                }
+            }
+        });
+
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-24/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-24/src/main.rs
new file mode 100644
index 000000000..b6aa046d1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-24/src/main.rs
@@ -0,0 +1,45 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming().take(2) {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+
+    println!("Shutting down.");
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/404.html b/src/doc/book/listings/ch20-web-server/listing-20-25/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.lock b/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.toml b/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/hello.html b/src/doc/book/listings/ch20-web-server/listing-20-25/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/src/lib.rs b/src/doc/book/listings/ch20-web-server/listing-20-25/src/lib.rs
new file mode 100644
index 000000000..54c0489ab
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/src/lib.rs
@@ -0,0 +1,92 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: Option<mpsc::Sender<Job>>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool {
+            workers,
+            sender: Some(sender),
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.as_ref().unwrap().send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        drop(self.sender.take());
+
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            if let Some(thread) = worker.thread.take() {
+                thread.join().unwrap();
+            }
+        }
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let message = receiver.lock().unwrap().recv();
+
+            match message {
+                Ok(job) => {
+                    println!("Worker {id} got a job; executing.");
+
+                    job();
+                }
+                Err(_) => {
+                    println!("Worker {id} disconnected; shutting down.");
+                    break;
+                }
+            }
+        });
+
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/listing-20-25/src/main.rs b/src/doc/book/listings/ch20-web-server/listing-20-25/src/main.rs
new file mode 100644
index 000000000..a649ff103
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/listing-20-25/src/main.rs
@@ -0,0 +1,53 @@
+use hello::ThreadPool;
+use std::fs;
+use std::io::prelude::*;
+use std::net::TcpListener;
+use std::net::TcpStream;
+use std::thread;
+use std::time::Duration;
+
+// ANCHOR: here
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming().take(2) {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+
+    println!("Shutting down.");
+}
+// ANCHOR_END: here
+
+fn handle_connection(mut stream: TcpStream) {
+    let mut buffer = [0; 1024];
+    stream.read(&mut buffer).unwrap();
+
+    let get = b"GET / HTTP/1.1\r\n";
+    let sleep = b"GET /sleep HTTP/1.1\r\n";
+
+    let (status_line, filename) = if buffer.starts_with(get) {
+        ("HTTP/1.1 200 OK", "hello.html")
+    } else if buffer.starts_with(sleep) {
+        thread::sleep(Duration::from_secs(5));
+        ("HTTP/1.1 200 OK", "hello.html")
+    } else {
+        ("HTTP/1.1 404 NOT FOUND", "404.html")
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+
+    let response = format!(
+        "{}\r\nContent-Length: {}\r\n\r\n{}",
+        status_line,
+        contents.len(),
+        contents
+    );
+
+    stream.write_all(response.as_bytes()).unwrap();
+    stream.flush().unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/404.html b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt
new file mode 100644
index 000000000..fa337b8a8
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/output.txt
@@ -0,0 +1,10 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0599]: no function or associated item named `new` found for struct `ThreadPool` in the current scope
+  --> src/main.rs:12:28
+   |
+12 |     let pool = ThreadPool::new(4);
+   |                            ^^^ function or associated item not found in `ThreadPool`
+
+For more information about this error, try `rustc --explain E0599`.
+error: could not compile `hello` due to previous error
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/lib.rs
new file mode 100644
index 000000000..7312e293d
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/lib.rs
@@ -0,0 +1 @@
+pub struct ThreadPool;
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/main.rs
new file mode 100644
index 000000000..f7b42167f
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-01-define-threadpool-struct/src/main.rs
@@ -0,0 +1,45 @@
+// ANCHOR: here
+use hello::ThreadPool;
+// ANCHOR_END: here
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/404.html b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt
new file mode 100644
index 000000000..44c8f3953
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/output.txt
@@ -0,0 +1,10 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0599]: no method named `execute` found for struct `ThreadPool` in the current scope
+  --> src/main.rs:17:14
+   |
+17 |         pool.execute(|| {
+   |              ^^^^^^^ method not found in `ThreadPool`
+
+For more information about this error, try `rustc --explain E0599`.
+error: could not compile `hello` due to previous error
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/lib.rs
new file mode 100644
index 000000000..f0e1890bb
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/lib.rs
@@ -0,0 +1,7 @@
+pub struct ThreadPool;
+
+impl ThreadPool {
+    pub fn new(size: usize) -> ThreadPool {
+        ThreadPool
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-02-impl-threadpool-new/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/404.html b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/output.txt b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/output.txt
new file mode 100644
index 000000000..dc76c43d6
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/output.txt
@@ -0,0 +1,3 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+    Finished dev [unoptimized + debuginfo] target(s) in 0.24s
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/lib.rs
new file mode 100644
index 000000000..1321ab873
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/lib.rs
@@ -0,0 +1,18 @@
+pub struct ThreadPool;
+
+// ANCHOR: here
+impl ThreadPool {
+    // --snip--
+    // ANCHOR_END: here
+    pub fn new(size: usize) -> ThreadPool {
+        ThreadPool
+    }
+
+    // ANCHOR: here
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-03-define-execute/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/404.html b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt
new file mode 100644
index 000000000..34d30fe05
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt
@@ -0,0 +1,24 @@
+$ cargo check
+    Checking hello v0.1.0 (file:///projects/hello)
+error[E0599]: no method named `join` found for enum `Option` in the current scope
+  --> src/lib.rs:52:27
+   |
+52 |             worker.thread.join().unwrap();
+   |                           ^^^^ method not found in `Option<JoinHandle<()>>`
+
+error[E0308]: mismatched types
+  --> src/lib.rs:72:22
+   |
+72 |         Worker { id, thread }
+   |                      ^^^^^^ expected enum `Option`, found struct `JoinHandle`
+   |
+   = note: expected enum `Option<JoinHandle<()>>`
+            found struct `JoinHandle<_>`
+help: try wrapping the expression in `Some`
+   |
+72 |         Worker { id, thread: Some(thread) }
+   |                      +++++++++++++      +
+
+Some errors have detailed explanations: E0308, E0599.
+For more information about an error, try `rustc --explain E0308`.
+error: could not compile `hello` due to 2 previous errors
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/lib.rs
new file mode 100644
index 000000000..6ef710a26
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/lib.rs
@@ -0,0 +1,76 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            worker.thread.join().unwrap();
+        }
+    }
+}
+
+// ANCHOR: here
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+// ANCHOR_END: here
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        Worker { id, thread }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-04-update-worker-definition/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/404.html b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/lib.rs
new file mode 100644
index 000000000..ede3750a1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/lib.rs
@@ -0,0 +1,83 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            worker.thread.join().unwrap();
+        }
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+// ANCHOR: here
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        // --snip--
+
+        // ANCHOR_END: here
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        // ANCHOR: here
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
+// ANCHOR_END: here
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/main.rs
new file mode 100644
index 000000000..79efb28a2
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-05-fix-worker-new/src/main.rs
@@ -0,0 +1,43 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/404.html b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/lib.rs
new file mode 100644
index 000000000..b795ea53b
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/lib.rs
@@ -0,0 +1,81 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+// ANCHOR: here
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            if let Some(thread) = worker.thread.take() {
+                thread.join().unwrap();
+            }
+        }
+    }
+}
+// ANCHOR_END: here
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let job = receiver.lock().unwrap().recv().unwrap();
+
+            println!("Worker {id} got a job; executing.");
+
+            job();
+        });
+
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/main.rs
new file mode 100644
index 000000000..b6aa046d1
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-06-fix-threadpool-drop/src/main.rs
@@ -0,0 +1,45 @@
+use hello::ThreadPool;
+use std::{
+    fs,
+    io::{prelude::*, BufReader},
+    net::{TcpListener, TcpStream},
+    thread,
+    time::Duration,
+};
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming().take(2) {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+
+    println!("Shutting down.");
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let buf_reader = BufReader::new(&mut stream);
+    let request_line = buf_reader.lines().next().unwrap().unwrap();
+
+    let (status_line, filename) = match &request_line[..] {
+        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
+        "GET /sleep HTTP/1.1" => {
+            thread::sleep(Duration::from_secs(5));
+            ("HTTP/1.1 200 OK", "hello.html")
+        }
+        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+    let length = contents.len();
+
+    let response =
+        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");
+
+    stream.write_all(response.as_bytes()).unwrap();
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html
new file mode 100644
index 000000000..88d8e9152
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Oops!</h1>
+    <p>Sorry, I don't know what you're asking for.</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock
new file mode 100644
index 000000000..f2d069f46
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hello"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml
new file mode 100644
index 000000000..fe619478a
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html
new file mode 100644
index 000000000..fe442d6b9
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Hello!</title>
+  </head>
+  <body>
+    <h1>Hello!</h1>
+    <p>Hi from Rust</p>
+  </body>
+</html>
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs
new file mode 100644
index 000000000..54c0489ab
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs
@@ -0,0 +1,92 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: Option<mpsc::Sender<Job>>,
+}
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+impl ThreadPool {
+    /// Create a new ThreadPool.
+    ///
+    /// The size is the number of threads in the pool.
+    ///
+    /// # Panics
+    ///
+    /// The `new` function will panic if the size is zero.
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for id in 0..size {
+            workers.push(Worker::new(id, Arc::clone(&receiver)));
+        }
+
+        ThreadPool {
+            workers,
+            sender: Some(sender),
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.as_ref().unwrap().send(job).unwrap();
+    }
+}
+
+impl Drop for ThreadPool {
+    fn drop(&mut self) {
+        drop(self.sender.take());
+
+        for worker in &mut self.workers {
+            println!("Shutting down worker {}", worker.id);
+
+            if let Some(thread) = worker.thread.take() {
+                thread.join().unwrap();
+            }
+        }
+    }
+}
+
+struct Worker {
+    id: usize,
+    thread: Option<thread::JoinHandle<()>>,
+}
+
+impl Worker {
+    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || loop {
+            let message = receiver.lock().unwrap().recv();
+
+            match message {
+                Ok(job) => {
+                    println!("Worker {id} got a job; executing.");
+
+                    job();
+                }
+                Err(_) => {
+                    println!("Worker {id} disconnected; shutting down.");
+                    break;
+                }
+            }
+        });
+
+        Worker {
+            id,
+            thread: Some(thread),
+        }
+    }
+}
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs
new file mode 100644
index 000000000..3161c2ee5
--- /dev/null
+++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs
@@ -0,0 +1,51 @@
+use hello::ThreadPool;
+use std::fs;
+use std::io::prelude::*;
+use std::net::TcpListener;
+use std::net::TcpStream;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+    let pool = ThreadPool::new(4);
+
+    for stream in listener.incoming().take(2) {
+        let stream = stream.unwrap();
+
+        pool.execute(|| {
+            handle_connection(stream);
+        });
+    }
+
+    println!("Shutting down.");
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    let mut buffer = [0; 1024];
+    stream.read(&mut buffer).unwrap();
+
+    let get = b"GET / HTTP/1.1\r\n";
+    let sleep = b"GET /sleep HTTP/1.1\r\n";
+
+    let (status_line, filename) = if buffer.starts_with(get) {
+        ("HTTP/1.1 200 OK", "hello.html")
+    } else if buffer.starts_with(sleep) {
+        thread::sleep(Duration::from_secs(5));
+        ("HTTP/1.1 200 OK", "hello.html")
+    } else {
+        ("HTTP/1.1 404 NOT FOUND", "404.html")
+    };
+
+    let contents = fs::read_to_string(filename).unwrap();
+
+    let response = format!(
+        "{}\r\nContent-Length: {}\r\n\r\n{}",
+        status_line,
+        contents.len(),
+        contents
+    );
+
+    stream.write_all(response.as_bytes()).unwrap();
+    stream.flush().unwrap();
+}
-- 
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