diff options
Diffstat (limited to 'src/doc/book/listings/ch04-understanding-ownership/listing-04-06')
4 files changed, 33 insertions, 0 deletions
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"); +} |