diff options
Diffstat (limited to 'src/doc/book/listings/ch15-smart-pointers/listing-15-12')
3 files changed, 40 insertions, 0 deletions
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 |