| #![feature(no_core)] |
| #![no_core] |
| |
| #![feature(negative_impls, lang_items)] |
| |
| #[lang = "sized"] |
| trait Sized {} |
| |
| #[lang = "deref"] |
| pub trait Deref { |
| /// The resulting type after dereferencing. |
| #[stable(feature = "rust1", since = "1.0.0")] |
| // #[rustc_diagnostic_item = "deref_target"] |
| type Target: ?Sized; |
| |
| /// Dereferences the value. |
| #[must_use] |
| #[stable(feature = "rust1", since = "1.0.0")] |
| // #[rustc_diagnostic_item = "deref_method"] |
| fn deref(&self) -> &Self::Target; |
| } |
| |
| impl<T: ?Sized> Deref for &T { |
| type Target = T; |
| |
| fn deref(&self) -> &T { |
| *self |
| } |
| } |
| |
| impl<T: ?Sized> !DerefMut for &T {} |
| |
| impl<T: ?Sized> Deref for &mut T { |
| type Target = T; |
| |
| fn deref(&self) -> &T { |
| *self |
| } |
| } |
| |
| #[lang = "deref_mut"] |
| pub trait DerefMut: Deref { |
| /// Mutably dereferences the value. |
| #[stable(feature = "rust1", since = "1.0.0")] |
| fn deref_mut(&mut self) -> &mut Self::Target; |
| } |
| |
| impl<T: ?Sized> DerefMut for &mut T { |
| fn deref_mut(&mut self) -> &mut T { |
| *self |
| } |
| } |
