1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
use malachite_base::num::arithmetic::traits::UnsignedAbs;
use malachite_base::num::basic::traits::One;
use malachite_nz::integer::Integer;
use malachite_nz::natural::Natural;
use Rational;
impl From<Integer> for Rational {
/// Converts an [`Integer`](malachite_nz::integer::Integer) to a [`Rational`], taking the
/// [`Integer`](malachite_nz::integer::Integer) by value.
///
/// # Worst-case complexity
/// Constant time and additional memory.
///
/// # Examples
/// ```
/// extern crate malachite_nz;
///
/// use malachite_nz::integer::Integer;
/// use malachite_q::Rational;
///
/// assert_eq!(Rational::from(Integer::from(123)), 123);
/// assert_eq!(Rational::from(Integer::from(-123)), -123);
/// ```
fn from(value: Integer) -> Rational {
Rational {
sign: value >= 0,
numerator: value.unsigned_abs(),
denominator: Natural::ONE,
}
}
}
impl<'a> From<&'a Integer> for Rational {
/// Converts an [`Integer`](malachite_nz::integer::Integer) to a [`Rational`], taking the
/// [`Integer`](malachite_nz::integer::Integer) by reference.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is `value.significant_bits()`.
///
/// # Examples
/// ```
/// extern crate malachite_nz;
///
/// use malachite_nz::integer::Integer;
/// use malachite_q::Rational;
///
/// assert_eq!(Rational::from(&Integer::from(123)), 123);
/// assert_eq!(Rational::from(&Integer::from(-123)), -123);
/// ```
fn from(value: &'a Integer) -> Rational {
Rational {
sign: *value >= 0,
numerator: value.unsigned_abs(),
denominator: Natural::ONE,
}
}
}