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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::{OverflowingSub, OverflowingSubAssign};
macro_rules! impl_overflowing_sub {
($t:ident) => {
impl OverflowingSub<$t> for $t {
type Output = $t;
/// This is a wrapper over the `overflowing_sub` functions in the standard library, for
/// example [this one](u32::overflowing_sub).
#[inline]
fn overflowing_sub(self, other: $t) -> ($t, bool) {
$t::overflowing_sub(self, other)
}
}
impl OverflowingSubAssign<$t> for $t {
/// Subtracts a number by another number, in place.
///
/// Returns a boolean indicating whether an arithmetic overflow occurred. If an overflow
/// occurred, then the wrapped value is assigned.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// See [here](super::overflowing_sub#overflowing_sub_assign).
#[inline]
fn overflowing_sub_assign(&mut self, other: $t) -> bool {
let overflow;
(*self, overflow) = self.overflowing_sub(other);
overflow
}
}
};
}
apply_to_primitive_ints!(impl_overflowing_sub);