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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::natural_vector::NaturalVector;
use core::ops::{Add, AddAssign};
fn assert_same_dimension(v: &NaturalVector, w: &NaturalVector) {
assert_eq!(
v.elements.len(),
w.elements.len(),
"cannot add vectors of different dimensions"
);
}
impl Add<Self> for NaturalVector {
type Output = Self;
/// Adds two [`NaturalVector`]s, taking both by value.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// let w = NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!((v + w).to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
#[inline]
fn add(mut self, other: Self) -> Self {
self += other;
self
}
}
impl Add<&Self> for NaturalVector {
type Output = Self;
/// Adds two [`NaturalVector`]s, taking the first by value and the second by reference.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// let w = NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!((v + &w).to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
#[inline]
fn add(mut self, other: &Self) -> Self {
self += other;
self
}
}
impl Add<NaturalVector> for &NaturalVector {
type Output = NaturalVector;
/// Adds two [`NaturalVector`]s, taking the first by reference and the second by value.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// let w = NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!((&v + w).to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
#[inline]
fn add(self, mut other: NaturalVector) -> NaturalVector {
other += self;
other
}
}
impl Add<&NaturalVector> for &NaturalVector {
type Output = NaturalVector;
/// Adds two [`NaturalVector`]s, taking both by reference.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// let w = NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!((&v + &w).to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
fn add(self, other: &NaturalVector) -> NaturalVector {
assert_same_dimension(self, other);
NaturalVector {
elements: self
.elements
.iter()
.zip(&other.elements)
.map(|(x, y)| x + y)
.collect(),
}
}
}
impl AddAssign<Self> for NaturalVector {
/// Adds a [`NaturalVector`] to a [`NaturalVector`] in place, taking the [`NaturalVector`] on
/// the right-hand side by value.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let mut v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// v += NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!(v.to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
fn add_assign(&mut self, other: Self) {
assert_same_dimension(self, &other);
for (x, y) in self.elements.iter_mut().zip(other.elements) {
*x += y;
}
}
}
impl AddAssign<&Self> for NaturalVector {
/// Adds a [`NaturalVector`] to a [`NaturalVector`] in place, taking the [`NaturalVector`] on
/// the right-hand side by reference.
///
/// The sum is taken element by element, so the result has the same dimension as the summands.
///
/// $$
/// f(v, w) = v + w.
/// $$
///
/// # 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 of both vectors.
///
/// # Panics
/// Panics if `self` and `other` have different dimensions.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_nz::natural_vector::NaturalVector;
///
/// let mut v = NaturalVector::from_str("(1, 2, 3)").unwrap();
/// v += &NaturalVector::from_str("(10, 0, 5)").unwrap();
/// assert_eq!(v.to_string(), "(11, 2, 8)");
/// ```
///
/// This is equivalent to `_fmpz_vec_add` from `fmpz_vec/add.c`, FLINT 3.6.0.
fn add_assign(&mut self, other: &Self) {
assert_same_dimension(self, other);
for (x, y) in self.elements.iter_mut().zip(&other.elements) {
*x += y;
}
}
}