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Handle zero-length lists in add_weighted

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This commit is contained in:
Brian Birtles 2017-07-06 06:38:17 +09:00
parent 296a215e54
commit 59a3142200
1 changed files with 8 additions and 0 deletions
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8
components/style/properties/helpers/animated_properties.mako.rs
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@ -828,6 +828,10 @@ macro_rules! repeated_vec_impl {
$(impl<T: RepeatableListAnimatable> Animatable for $ty {
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64)
-> Result<Self, ()> {
// If the length of either list is zero, the least common multiple is undefined.
if cmp::min(self.len(), other.len()) < 1 {
return Err(());
}
use num_integer::lcm;
let len = lcm(self.len(), other.len());
self.iter().cycle().zip(other.iter().cycle()).take(len).map(|(me, you)| {
@ -842,6 +846,10 @@ macro_rules! repeated_vec_impl {
#[inline]
fn compute_squared_distance(&self, other: &Self) -> Result<f64, ()> {
// If the length of either list is zero, the least common multiple is undefined.
if cmp::min(self.len(), other.len()) < 1 {
return Err(());
}
use num_integer::lcm;
let len = lcm(self.len(), other.len());
self.iter().cycle().zip(other.iter().cycle()).take(len).map(|(me, you)| {