bjoernager/rust
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Remove the last remnant of unsigned Neg

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It's been gone since #23945, before Rust 1.0. The former wrapping
semantics have also been available as inherent methods for a long time
now. There's no reason to keep this unused macro around.
This commit is contained in:
Josh Stone 2020-04-13 18:37:06 -07:00
parent 8e18e26f12
commit 9ede5b04d0
1 changed files with 4 additions and 17 deletions
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21
src/libcore/ops/arith.rs
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@ -617,35 +617,22 @@ pub trait Neg {
fn neg(self) -> Self::Output;
}
macro_rules! neg_impl_core {
($id:ident => $body:expr, $($t:ty)*) => ($(
macro_rules! neg_impl {
($($t:ty)*) => ($(
#[stable(feature = "rust1", since = "1.0.0")]
impl Neg for $t {
type Output = $t;
#[inline]
#[rustc_inherit_overflow_checks]
fn neg(self) -> $t { let $id = self; $body }
fn neg(self) -> $t { -self }
}
forward_ref_unop! { impl Neg, neg for $t }
)*)
}
macro_rules! neg_impl_numeric {
($($t:ty)*) => { neg_impl_core!{ x => -x, $($t)*} }
}
#[allow(unused_macros)]
macro_rules! neg_impl_unsigned {
($($t:ty)*) => {
neg_impl_core!{ x => {
!x.wrapping_add(1)
}, $($t)*} }
}
// neg_impl_unsigned! { usize u8 u16 u32 u64 }
neg_impl_numeric! { isize i8 i16 i32 i64 i128 f32 f64 }
neg_impl! { isize i8 i16 i32 i64 i128 f32 f64 }
/// The addition assignment operator `+=`.
///