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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::rational_vector::RationalVector;
use malachite_base::num::arithmetic::traits::{Abs, AbsAssign, EntrywiseAbs, EntrywiseAbsAssign};
impl EntrywiseAbs for RationalVector {
type Output = Self;
/// Replaces every element of a [`RationalVector`] by its absolute value, taking the vector by
/// value.
///
/// The dimension is unchanged. This is not [`Abs`], which for a vector would be its Euclidean
/// length.
///
/// $$
/// f(v) = (|v_0|, |v_1|, \ldots, |v_{n-1}|).
/// $$
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbs;
/// use malachite_q::rational_vector::RationalVector;
///
/// let v = RationalVector::from_str("(1/2, -2/3, 0, -3)").unwrap();
/// assert_eq!(v.clone().entrywise_abs().to_string(), "(1/2, 2/3, 0, 3)");
/// ```
#[inline]
fn entrywise_abs(mut self) -> Self {
self.entrywise_abs_assign();
self
}
}
impl EntrywiseAbs for &RationalVector {
type Output = RationalVector;
/// Replaces every element of a [`RationalVector`] by its absolute value, taking the vector by
/// reference.
///
/// See the documentation for the [`EntrywiseAbs`] implementation on [`RationalVector`] that
/// takes the vector by value for details.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbs;
/// use malachite_q::rational_vector::RationalVector;
///
/// let v = RationalVector::from_str("(1/2, -2/3, 0, -3)").unwrap();
/// assert_eq!((&v).entrywise_abs().to_string(), "(1/2, 2/3, 0, 3)");
/// ```
fn entrywise_abs(self) -> RationalVector {
RationalVector {
elements: self.elements.iter().map(Abs::abs).collect(),
}
}
}
impl EntrywiseAbsAssign for RationalVector {
/// Replaces every element of a [`RationalVector`] by its absolute value, in place.
///
/// See the documentation for the [`EntrywiseAbs`] implementation on [`RationalVector`] that
/// takes the vector by value for details.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbsAssign;
/// use malachite_q::rational_vector::RationalVector;
///
/// let mut v = RationalVector::from_str("(1/2, -2/3, 0, -3)").unwrap();
/// v.entrywise_abs_assign();
/// assert_eq!(v.to_string(), "(1/2, 2/3, 0, 3)");
/// ```
fn entrywise_abs_assign(&mut self) {
for x in &mut self.elements {
x.abs_assign();
}
}
}