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Bug 1330824 - Add IndexMut for nsStyleAutoArray. r=heycam

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MozReview-Commit-ID: 9EU8g4SLoHp
This commit is contained in:
Hiroyuki Ikezoe 2017-01-14 11:39:33 +09:00
parent ce59a7e9ee
commit 2d19e67fc4
1 changed files with 13 additions and 1 deletions
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14
components/style/gecko_bindings/sugar/ns_style_auto_array.rs
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@ -7,7 +7,7 @@
use gecko_bindings::bindings::Gecko_EnsureStyleAnimationArrayLength; use gecko_bindings::bindings::Gecko_EnsureStyleAnimationArrayLength;
use gecko_bindings::structs::nsStyleAutoArray; use gecko_bindings::structs::nsStyleAutoArray;
use std::iter::{once, Chain, Once, IntoIterator}; use std::iter::{once, Chain, Once, IntoIterator};
use std::ops::Index; use std::ops::{Index, IndexMut};
use std::slice::{Iter, IterMut}; use std::slice::{Iter, IterMut};
impl<T> Index<usize> for nsStyleAutoArray<T> { impl<T> Index<usize> for nsStyleAutoArray<T> {
@ -23,6 +23,18 @@ impl<T> Index<usize> for nsStyleAutoArray<T> {
} }
} }
impl<T> IndexMut<usize> for nsStyleAutoArray<T> {
fn index_mut(&mut self, index: usize) -> &mut T {
if index > self.len() {
panic!("out of range")
}
match index {
0 => &mut self.mFirstElement,
_ => &mut self.mOtherElements[index - 1],
}
}
}
impl<T> nsStyleAutoArray<T> { impl<T> nsStyleAutoArray<T> {
/// Mutably iterate over the array elements. /// Mutably iterate over the array elements.
pub fn iter_mut(&mut self) -> Chain<Once<&mut T>, IterMut<T>> { pub fn iter_mut(&mut self) -> Chain<Once<&mut T>, IterMut<T>> {