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Rollup merge of #80959 - jhpratt:unsigned_abs-stabilization, r=m-ou-se

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Stabilize `unsigned_abs`

Resolves #74913.

This PR stabilizes the `i*::unsigned_abs()` method, which returns the absolute value of an integer _as its unsigned equivalent_. This has the advantage that it does not overflow on `i*::MIN`.

I have gone ahead and used this in a couple locations throughout the repository.
This commit is contained in:
Yuki Okushi 2021-01-30 13:36:44 +09:00 • committed by GitHub
commit 91ea1cbc17
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6 changed files with 8 additions and 17 deletions
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4
library/core/src/num/int_macros.rs
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@ -1158,12 +1158,12 @@ macro_rules! int_impl {
/// Basic usage:
///
/// ```
/// #![feature(unsigned_abs)]
#[doc = concat!("assert_eq!(100", stringify!($SelfT), ".unsigned_abs(), 100", stringify!($UnsignedT), ");")]
#[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").unsigned_abs(), 100", stringify!($UnsignedT), ");")]
/// assert_eq!((-128i8).unsigned_abs(), 128u8);
/// ```
#[unstable(feature = "unsigned_abs", issue = "74913")]
#[stable(feature = "unsigned_abs", since = "1.51.0")]
#[rustc_const_stable(feature = "unsigned_abs", since = "1.51.0")]
#[inline]
pub const fn unsigned_abs(self) -> $UnsignedT {
self.wrapping_abs() as $UnsignedT