diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
| commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
| tree | 173a775858bd501c378080a10dca74132f05bc50 /src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations | |
| parent | Initial commit. (diff) | |
| download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip | |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/doc/book/listings/ch04-understanding-ownership/no-listing-08-reference-with-annotations')
4 files changed, 27 insertions, 0 deletions
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 |