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| -rw-r--r-- | src/libcore/convert.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/libcore/convert.rs b/src/libcore/convert.rs index 5191cd76010..5f16a4f2435 100644 --- a/src/libcore/convert.rs +++ b/src/libcore/convert.rs @@ -92,6 +92,22 @@ pub trait AsRef<T: ?Sized> { /// [`Option<T>`]: ../../std/option/enum.Option.html /// [`Result<T, E>`]: ../../std/result/enum.Result.html /// +/// # Examples +/// +/// [`Box<T>`] implements `AsMut<T>`: +/// +/// [`Box<T>`]: ../../std/boxed/struct.Box.html +/// +/// ``` +/// fn add_one<T: AsMut<u64>>(num: &mut T) { +/// *num.as_mut() += 1; +/// } +/// +/// let mut boxed_num = Box::new(0); +/// add_one(&mut boxed_num); +/// assert_eq!(*boxed_num, 1); +/// ``` +/// /// # Generic Impls /// /// - `AsMut` auto-dereferences if the inner type is a reference or a mutable |