diff options
Diffstat (limited to 'src/doc/book/listings/ch09-error-handling')
55 files changed, 655 insertions, 0 deletions
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 +} |