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Clean up YieldFinder

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This commit is contained in:
John Kåre Alsaker 2017-08-25 20:10:23 +02:00
parent c71153113b
commit 536613554f
1 changed files with 8 additions and 3 deletions
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11
src/librustc/middle/region.rs
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@ -1175,13 +1175,18 @@ struct YieldFinder<'a> {
impl<'a> YieldFinder<'a> {
fn lookup<F: FnOnce(&mut Self)>(&mut self, id: NodeId, f: F) {
// Don't traverse further if we found a yield expression
if self.result.is_some() {
return;
}
// See if there's an entry in the cache
if let Some(result) = self.cache.get(&id) {
self.result = *result;
return;
}
if self.result.is_some() {
return;
}
// Otherwise calculate the result and insert it into the cache
f(self);
self.cache.insert(id, self.result);
}