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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_polynomial::NaturalPolynomial;
use malachite_base::num::arithmetic::traits::{CanonicalizeUnit, CanonicalizeUnitAssign};
impl CanonicalizeUnit for NaturalPolynomial {
type Output = Self;
/// Brings a [`NaturalPolynomial`] into canonical unit form, taking it by value.
///
/// The coefficients are non-negative, so the leading coefficient already is, and the polynomial
/// is its own canonical associate: this is the identity, as it is for the coefficient type.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::CanonicalizeUnit;
/// use malachite_base::num::basic::traits::Zero;
/// use malachite_nz::natural_polynomial::NaturalPolynomial;
///
/// assert_eq!(
/// NaturalPolynomial::from_str("3*x^2+2")
/// .unwrap()
/// .canonicalize_unit()
/// .to_string(),
/// "3*x^2+2"
/// );
/// assert_eq!(
/// NaturalPolynomial::ZERO.canonicalize_unit(),
/// NaturalPolynomial::ZERO
/// );
/// ```
#[inline]
fn canonicalize_unit(self) -> Self {
self
}
}
impl CanonicalizeUnit for &NaturalPolynomial {
type Output = NaturalPolynomial;
/// Brings a [`NaturalPolynomial`] into canonical unit form, taking it by reference.
///
/// The coefficients are non-negative, so the leading coefficient already is, and the polynomial
/// is its own canonical associate: this is the identity, as it is for the coefficient type.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total size of the coefficients.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::CanonicalizeUnit;
/// use malachite_base::num::basic::traits::Zero;
/// use malachite_nz::natural_polynomial::NaturalPolynomial;
///
/// assert_eq!(
/// (&NaturalPolynomial::from_str("3*x^2+2").unwrap())
/// .canonicalize_unit()
/// .to_string(),
/// "3*x^2+2"
/// );
/// assert_eq!(
/// (&NaturalPolynomial::ZERO).canonicalize_unit(),
/// NaturalPolynomial::ZERO
/// );
/// ```
#[inline]
fn canonicalize_unit(self) -> NaturalPolynomial {
self.clone()
}
}
impl CanonicalizeUnitAssign for NaturalPolynomial {
/// Brings a [`NaturalPolynomial`] into canonical unit form, in place.
///
/// See [`canonicalize_unit`](CanonicalizeUnit::canonicalize_unit).
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::CanonicalizeUnitAssign;
/// use malachite_nz::natural_polynomial::NaturalPolynomial;
///
/// let mut p = NaturalPolynomial::from_str("3*x^2+2").unwrap();
/// p.canonicalize_unit_assign();
/// assert_eq!(p.to_string(), "3*x^2+2");
/// ```
#[inline]
fn canonicalize_unit_assign(&mut self) {}
}