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use integer::Integer;
use malachite_base::num::arithmetic::traits::UnsignedAbs;
use std::cmp::Ordering;
macro_rules! impl_float {
($t: ident) => {
impl PartialOrd<$t> for Integer {
/// Compares an [`Integer`] to a primitive float.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where n = `self.significant_bits()`.
///
/// # Examples
/// See [here](super::partial_cmp_primitive_float#partial_cmp).
fn partial_cmp(&self, other: &$t) -> Option<Ordering> {
if self.sign {
self.unsigned_abs().partial_cmp(other)
} else {
self.unsigned_abs()
.partial_cmp(&-other)
.map(Ordering::reverse)
}
}
}
impl PartialOrd<Integer> for $t {
/// Compares a primitive float to an [`Integer`].
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where n = `other.significant_bits()`
///
/// # Examples
/// See [here](super::partial_cmp_primitive_float#partial_cmp).
#[inline]
fn partial_cmp(&self, other: &Integer) -> Option<Ordering> {
other.partial_cmp(self).map(Ordering::reverse)
}
}
};
}
apply_to_primitive_floats!(impl_float);