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factor::numeric::DoubleInt: Document the DoubleWidth associated type

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nicoo 2020-07-21 19:49:57 +02:00 • committed by Roy Ivy III
parent 17c69674eb
commit 9a80ab7741
1 changed files with 4 additions and 0 deletions
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4
src/uu/factor/src/numeric.rs
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@ -217,11 +217,15 @@ pub(crate) trait Int:
{
fn as_u64(&self) -> u64;
fn from_u64(n: u64) -> Self;
#[cfg(debug_assertions)]
fn as_u128(&self) -> u128;
}
pub(crate) trait DoubleInt: Int {
/// An integer type with twice the width of `Self`.
/// In particular, multiplications (of `Int` values) can be performed in
/// `Self::DoubleWidth` without possibility of overflow.
type DoubleWidth: Int;
fn as_double_width(self) -> Self::DoubleWidth;