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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::gaussian_integer::GaussianInteger;
use core::ops::Neg;
use malachite_base::num::arithmetic::traits::NegAssign;
impl Neg for GaussianInteger {
type Output = Self;
/// Negates a [`GaussianInteger`], taking it by value. Both the real and imaginary parts are
/// negated.
///
/// $$
/// f(x) = -x.
/// $$
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// use malachite_base::num::basic::traits::{I, Zero};
/// use malachite_nz::gaussian_integer::GaussianInteger;
/// use std::str::FromStr;
///
/// assert_eq!((-GaussianInteger::ZERO).to_string(), "0");
/// assert_eq!((-GaussianInteger::I).to_string(), "-i");
/// assert_eq!(
/// (-GaussianInteger::from_str("2-3i").unwrap()).to_string(),
/// "-2+3i"
/// );
/// ```
fn neg(mut self) -> Self {
self.neg_assign();
self
}
}
impl Neg for &GaussianInteger {
type Output = GaussianInteger;
/// Negates a [`GaussianInteger`], taking it by reference. Both the real and imaginary parts are
/// negated.
///
/// $$
/// f(x) = -x.
/// $$
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the maximum number of significant
/// bits of the real and imaginary parts.
///
/// # Examples
/// ```
/// use malachite_base::num::basic::traits::{I, Zero};
/// use malachite_nz::gaussian_integer::GaussianInteger;
/// use std::str::FromStr;
///
/// assert_eq!((-&GaussianInteger::ZERO).to_string(), "0");
/// assert_eq!((-&GaussianInteger::I).to_string(), "-i");
/// let x = GaussianInteger::from_str("2-3i").unwrap();
/// assert_eq!((-&x).to_string(), "-2+3i");
/// ```
fn neg(self) -> GaussianInteger {
GaussianInteger {
real: -&self.real,
imaginary: -&self.imaginary,
}
}
}
impl NegAssign for GaussianInteger {
/// Negates a [`GaussianInteger`] in place. Both the real and imaginary parts are negated.
///
/// $$
/// x \gets -x.
/// $$
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// use malachite_base::num::arithmetic::traits::NegAssign;
/// use malachite_nz::gaussian_integer::GaussianInteger;
/// use std::str::FromStr;
///
/// let mut x = GaussianInteger::from_str("2-3i").unwrap();
/// x.neg_assign();
/// assert_eq!(x.to_string(), "-2+3i");
/// ```
fn neg_assign(&mut self) {
self.real.neg_assign();
self.imaginary.neg_assign();
}
}