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// Copyright © 2026 Mikhail Hogrefe
//
// This file is part of Malachite.
//
// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
// 3 of the License, or (at your option) any later version. See <https://www.gnu.org/licenses/>.
use crate::num::arithmetic::traits::{SaturatingAbs, SaturatingAbsAssign};
macro_rules! impl_saturating_abs {
($t:ident) => {
impl SaturatingAbs for $t {
type Output = $t;
/// This is a wrapper over the `saturating_abs` functions in the standard library, for
/// example [this one](i32::saturating_abs).
#[inline]
fn saturating_abs(self) -> $t {
$t::saturating_abs(self)
}
}
impl SaturatingAbsAssign for $t {
/// Replaces a number with its absolute value, saturating at the numeric bounds instead
/// of overflowing.
///
/// $$
/// x \gets \\begin{cases}
/// |x| & \text{if} \\quad x > -2^{W-1}, \\\\
/// 2^{W-1} - 1 & \text{if} \\quad x = -2^{W-1},
/// \\end{cases}
/// $$
/// where $W$ is `Self::WIDTH`.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// See [here](super::saturating_abs#saturating_abs_assign).
#[inline]
fn saturating_abs_assign(&mut self) {
*self = self.saturating_abs();
}
}
};
}
apply_to_signeds!(impl_saturating_abs);