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Rollup merge of #71112 - cuviper:unsigned-Neg, r=Mark-Simulacrum

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Remove the last remnant of unsigned Neg

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:
Dylan DPC 2020-04-14 15:35:28 +02:00 • committed by GitHub
commit 216e070db4
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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; fn neg(self) -> Self::Output;
} }
macro_rules! neg_impl_core { macro_rules! neg_impl {
($id:ident => $body:expr, $($t:ty)*) => ($( ($($t:ty)*) => ($(
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
impl Neg for $t { impl Neg for $t {
type Output = $t; type Output = $t;
#[inline] #[inline]
#[rustc_inherit_overflow_checks] #[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 } forward_ref_unop! { impl Neg, neg for $t }
)*) )*)
} }
macro_rules! neg_impl_numeric { neg_impl! { isize i8 i16 i32 i64 i128 f32 f64 }
($($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 }
/// The addition assignment operator `+=`. /// The addition assignment operator `+=`.
/// ///