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Eliminate redundant parse_selector.

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MozReview-Commit-ID: 6eBVgT9ri5Q
This commit is contained in:
Bobby Holley 2017-06-05 09:58:37 -07:00
parent 27568de567
commit 442211723c
1 changed files with 5 additions and 17 deletions
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22
components/selectors/parser.rs
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@ -921,29 +921,17 @@ fn complex_selector_specificity<Impl>(mut iter: SelectorIter<Impl>)
specificity
}
/// Build up a Selector.
/// selector : simple_selector_sequence [ combinator simple_selector_sequence ]* ;
///
/// `Err` means invalid selector.
fn parse_selector<P, Impl>(parser: &P, input: &mut CssParser) -> Result<Selector<Impl>, ()>
where P: Parser<Impl=Impl>, Impl: SelectorImpl
{
let selector = parse_complex_selector(parser, input)?;
Ok(selector)
}
/// We make this large because the result of parsing a selector is fed into a new
/// Arc-ed allocation, so any spilled vec would be a wasted allocation. Also,
/// Components are large enough that we don't have much cache locality benefit
/// from reserving stack space for fewer of them.
type ParseVec<Impl> = SmallVec<[Component<Impl>; 32]>;
/// Parses a complex selector, including any pseudo-element.
/// Build up a Selector.
/// selector : simple_selector_sequence [ combinator simple_selector_sequence ]* ;
///
/// For now, it always forces the pseudo-element to be at the end of the
/// selector, and the boolean represents whether the last thing parsed was a
/// pseudo-element.
fn parse_complex_selector<P, Impl>(
/// `Err` means invalid selector.
fn parse_selector<P, Impl>(
parser: &P,
input: &mut CssParser)
-> Result<Selector<Impl>, ()>
@ -1012,7 +1000,7 @@ impl<Impl: SelectorImpl> Selector<Impl> {
pub fn parse<P>(parser: &P, input: &mut CssParser) -> Result<Self, ()>
where P: Parser<Impl=Impl>
{
let selector = parse_complex_selector(parser, input)?;
let selector = parse_selector(parser, input)?;
if selector.has_pseudo_element() {
return Err(())
}