malachite_base/num/arithmetic/
abs_diff.rs

1// Copyright © 2025 Mikhail Hogrefe
2//
3// This file is part of Malachite.
4//
5// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
6// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
7// 3 of the License, or (at your option) any later version. See <https://www.gnu.org/licenses/>.
8
9use crate::num::arithmetic::traits::{AbsDiff, AbsDiffAssign};
10
11macro_rules! impl_abs_diff_unsigned {
12    ($t:ident) => {
13        impl AbsDiff for $t {
14            type Output = $t;
15
16            /// This is a wrapper over the `abs_diff` functions in the standard library, for example
17            /// [this one](u32::abs_diff).
18            #[inline]
19            fn abs_diff(self, other: $t) -> $t {
20                self.abs_diff(other)
21            }
22        }
23
24        impl AbsDiffAssign for $t {
25            /// Subtracts a number by another and takes the absolute value, in place. The output
26            /// type is the unsigned type with the same width.
27            ///
28            /// # Worst-case complexity
29            /// Constant time and additional memory.
30            ///
31            /// # Examples
32            /// See [here](super::abs_diff#abs_diff_assign).
33            #[inline]
34            fn abs_diff_assign(&mut self, other: $t) {
35                *self = self.abs_diff(other);
36            }
37        }
38    };
39}
40apply_to_unsigneds!(impl_abs_diff_unsigned);
41
42macro_rules! impl_abs_diff_signed {
43    ($u:ident, $s:ident) => {
44        impl AbsDiff for $s {
45            type Output = $u;
46
47            /// This is a wrapper over the `abs_diff` functions in the standard library, for example
48            /// [this one](i32::abs_diff).
49            #[inline]
50            fn abs_diff(self, other: $s) -> $u {
51                self.abs_diff(other)
52            }
53        }
54    };
55}
56apply_to_unsigned_signed_pairs!(impl_abs_diff_signed);
malachite_base/num/arithmetic/abs_diff.rs

malachite_base/num/arithmetic/
abs_diff.rs
