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Fix saturating_mul (#5925)

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This commit is contained in:
Marcio Diaz
2020-05-06 17:37:02 +02:00
committed by GitHub
parent d3d0ccff12
commit a1127f8f9d
1 changed files with 9 additions and 2 deletions
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substrate/primitives/arithmetic/src/traits.rs
+9 -2
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@@ -123,7 +123,7 @@ pub trait Saturating {
fn saturating_pow(self, exp: usize) -> Self;
}
impl<T: Clone + One + CheckedMul + Bounded + num_traits::Saturating> Saturating for T {
impl<T: Clone + Zero + One + PartialOrd + CheckedMul + Bounded + num_traits::Saturating> Saturating for T {
fn saturating_add(self, o: Self) -> Self {
<Self as num_traits::Saturating>::saturating_add(self, o)
}
@@ -133,7 +133,14 @@ impl<T: Clone + One + CheckedMul + Bounded + num_traits::Saturating> Saturating
}
fn saturating_mul(self, o: Self) -> Self {
self.checked_mul(&o).unwrap_or_else(Bounded::max_value)
self.checked_mul(&o)
.unwrap_or_else(||
if (self < T::zero()) != (o < T::zero()) {
Bounded::min_value()
} else {
Bounded::max_value()
}
)
}
fn saturating_pow(self, exp: usize) -> Self {