bjoernager/rust
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Rollup merge of #35793 - matthew-piziak:add-rhs-example, r=steveklabnik

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demonstrate `RHS != Self` use cases for `Add` and `Sub`
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Jonathan Turner 2016-09-02 15:28:50 -07:00 • committed by GitHub
commit c330376a4d
1 changed files with 12 additions and 0 deletions
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12
src/libcore/ops.rs
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@ -282,6 +282,12 @@ macro_rules! forward_ref_binop {
/// Point { x: 3, y: 3 }); /// Point { x: 3, y: 3 });
/// } /// }
/// ``` /// ```
///
/// Note that `RHS = Self` by default, but this is not mandatory. For example,
/// [std::time::SystemTime] implements `Add<Duration>`, which permits
/// operations of the form `SystemTime = SystemTime + Duration`.
///
/// [std::time::SystemTime]: ../../std/time/struct.SystemTime.html
#[lang = "add"] #[lang = "add"]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
pub trait Add<RHS=Self> { pub trait Add<RHS=Self> {
@ -349,6 +355,12 @@ add_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
/// Point { x: 1, y: 0 }); /// Point { x: 1, y: 0 });
/// } /// }
/// ``` /// ```
///
/// Note that `RHS = Self` by default, but this is not mandatory. For example,
/// [std::time::SystemTime] implements `Sub<Duration>`, which permits
/// operations of the form `SystemTime = SystemTime - Duration`.
///
/// [std::time::SystemTime]: ../../std/time/struct.SystemTime.html
#[lang = "sub"] #[lang = "sub"]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
pub trait Sub<RHS=Self> { pub trait Sub<RHS=Self> {