use crate::fraction::Fraction;
use core::{fmt, ops};
pub trait TimeInt:
Copy
+ num::Integer
+ num::Bounded
+ num::traits::WrappingAdd
+ num::traits::WrappingSub
+ num::CheckedAdd
+ num::CheckedSub
+ num::CheckedMul
+ num::CheckedDiv
+ From<u32>
+ ops::Mul<Fraction, Output = Self>
+ ops::Div<Fraction, Output = Self>
+ fmt::Display
+ fmt::Debug
{
fn checked_mul_fraction(&self, fraction: &Fraction) -> Option<Self> {
self.checked_mul(&(*fraction.numerator()).into())?
.checked_div(&(*fraction.denominator()).into())
}
fn checked_div_fraction(&self, fraction: &Fraction) -> Option<Self> {
self.checked_mul_fraction(&fraction.recip())
}
}
impl TimeInt for u32 {}
impl TimeInt for u64 {}
#[cfg(test)]
mod tests {
use crate::{fraction::Fraction, time_int::TimeInt};
#[test]
fn checked_integer_mul_fraction() {
assert_eq!(
8_u32.checked_mul_fraction(&Fraction::new(1, 2)),
Some(4_u32)
);
assert_eq!(
8_u32.checked_mul_fraction(&Fraction::new(1, 3)),
Some(2_u32)
);
}
#[test]
fn checked_integer_div_fraction() {
assert_eq!(
8_u32.checked_div_fraction(&Fraction::new(1, 2)),
Some(16_u32)
);
assert_eq!(
8_u32.checked_div_fraction(&Fraction::new(3, 1)),
Some(2_u32)
);
}
}