malachite_nz/natural/conversion/is_integer.rs
1// Copyright © 2026 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::natural::Natural;
10use malachite_base::num::conversion::traits::IsInteger;
11
12impl IsInteger for &Natural {
13 /// Determines whether a [`Natural`] is an integer. It always returns `true`.
14 ///
15 /// $f(x) = \textrm{true}$.
16 ///
17 /// # Worst-case complexity
18 /// Constant time and additional memory.
19 ///
20 /// # Examples
21 /// ```
22 /// use malachite_base::num::basic::traits::{One, Zero};
23 /// use malachite_base::num::conversion::traits::IsInteger;
24 /// use malachite_nz::natural::Natural;
25 ///
26 /// assert_eq!(Natural::ZERO.is_integer(), true);
27 /// assert_eq!(Natural::ONE.is_integer(), true);
28 /// assert_eq!(Natural::from(100u32).is_integer(), true);
29 /// ```
30 #[inline]
31 fn is_integer(self) -> bool {
32 true
33 }
34}