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use super::division::{Division, DivisionResult};
/// Trait used for the old base conversion.
pub(super) trait CalcRemainders<T, D>{
fn calc_remainders(self, divisor : D) -> Remainders<T,D>;
}
impl<T, D> CalcRemainders<T, D> for T
where T:Division<D>
{
fn calc_remainders(self, divisor : D) -> Remainders<T, D> {
Remainders::new(self,divisor)
}
}
pub(super) struct Remainders<T, U>{
value : Option<T>,
divisor : U,
}
impl<U, T:Division<U>> Remainders<T, U> {
fn new(value : T, divisor : U) -> Self {
let value = if value.is_zero() { None } else { Some(value) };
Remainders {
value,
divisor,
}
}
}
impl<U, T:Division<U>> Iterator for Remainders<T,U>{
type Item=U;
fn next(&mut self) -> Option<Self::Item> {
if let Some(v) = self.value.take() {
let DivisionResult{result, remainder} = v.divide(&self.divisor);
self.value = if result.is_zero() { None } else { Some(result) };
Some(remainder)
} else {
None
}
}
}
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