use crate::Rational;
use malachite_base::num::basic::traits::{One, Zero};
impl From<bool> for Rational {
/// Converts a [`bool`] to 0 or 1.
///
/// This function is known as the
/// [Iverson bracket](https://en.wikipedia.org/wiki/Iverson_bracket).
///
/// $$
/// f(P) = \[P\] = \\begin{cases}
/// 1 & \text{if} \\quad P, \\\\
/// 0 & \\text{otherwise}.
/// \\end{cases}
/// $$
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// use malachite_q::Rational;
///
/// assert_eq!(Rational::from(false), 0);
/// assert_eq!(Rational::from(true), 1);
/// ```
#[inline]
fn from(b: bool) -> Rational {
if b {
Rational::ONE
} else {
Rational::ZERO
}
}
}