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NonZero wrapping_abs.

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Iago-lito 2021-04-15 12:25:13 +02:00
parent 65e7321457
commit b6589bbfa9
1 changed files with 33 additions and 0 deletions
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33
library/core/src/num/nonzero.rs
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@ -561,6 +561,39 @@ macro_rules! nonzero_signed_operations {
// SAFETY: absolute value of nonzero cannot yield zero values.
unsafe { $Ty::new_unchecked(self.get().saturating_abs()) }
}
/// Wrapping absolute value, see
#[doc = concat!("[`", stringify!($Int), "::wrapping_abs`].")]
///
/// # Example
///
/// ```
/// #![feature(nonzero_ops)]
/// # #![feature(try_trait)]
#[doc = concat!("# use std::num::", stringify!($Ty), ";")]
///
/// # fn main() -> Result<(), std::option::NoneError> {
#[doc = concat!("let pos = ", stringify!($Ty), "::new(1)?;")]
#[doc = concat!("let neg = ", stringify!($Ty), "::new(-1)?;")]
#[doc = concat!("let min = ", stringify!($Ty), "::new(",
stringify!($Int), "::MIN)?;")]
#[doc = concat!("let max = ", stringify!($Ty), "::new(",
stringify!($Int), "::MAX)?;")]
///
/// assert_eq!(pos, pos.wrapping_abs());
/// assert_eq!(pos, neg.wrapping_abs());
/// assert_eq!(min, min.wrapping_abs());
/// # // FIXME: add once Neg is implemented?
/// # // assert_eq!(max, (-max).wrapping_abs());
/// # Ok(())
/// # }
/// ```
#[unstable(feature = "nonzero_ops", issue = "84186")]
#[inline]
pub const fn wrapping_abs(self) -> $Ty {
// SAFETY: absolute value of nonzero cannot yield zero values.
unsafe { $Ty::new_unchecked(self.get().wrapping_abs()) }
}
}
)+
}