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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::{Abs, AbsAssign, UnsignedAbs};
macro_rules! impl_abs_primitive_int {
($u:ident, $s:ident) => {
impl Abs for $s {
type Output = $s;
/// This is a wrapper over the `abs` functions in the standard library, for example
/// [this one](i32::abs).
#[inline]
fn abs(self) -> $s {
$s::abs(self)
}
}
impl AbsAssign for $s {
/// Replaces a number with its absolute value.
///
/// $x \gets |x|$.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// See [here](super::abs#abs_assign).
#[inline]
fn abs_assign(&mut self) {
*self = self.abs();
}
}
impl UnsignedAbs for $s {
type Output = $u;
/// This is a wrapper over the `unsigned_abs` functions in the standard library, for
/// example [this one](i32::unsigned_abs).
#[inline]
fn unsigned_abs(self) -> $u {
self.unsigned_abs()
}
}
};
}
apply_to_unsigned_signed_pairs!(impl_abs_primitive_int);
macro_rules! impl_abs_primitive_float {
($f:ident) => {
impl Abs for $f {
type Output = $f;
/// This is a wrapper over the `fabs` functions from [`libm`].
#[inline]
fn abs(self) -> $f {
libm::Libm::<$f>::fabs(self)
}
}
impl AbsAssign for $f {
/// Replaces a number with its absolute value.
///
/// $x \gets |x|$.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// See [here](super::abs#abs_assign).
#[inline]
fn abs_assign(&mut self) {
*self = self.abs();
}
}
};
}
apply_to_primitive_floats!(impl_abs_primitive_float);