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Eliminate unneeded clones in find_or_create

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...and use it to eliminate duplicate hash lookups and string copies in shape_text.
This commit is contained in:
Matt Brubeck 2016-05-13 17:29:13 -07:00
parent 1c5ec6f3ec
commit d2717c4475
3 changed files with 34 additions and 41 deletions
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4
tests/unit/util/cache.rs
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@ -13,7 +13,7 @@ fn test_hashcache() {
assert!(cache.find(&1).is_some());
assert!(cache.find(&2).is_none());
cache.find_or_create(&2, |_v| { Cell::new("two") });
cache.find_or_create(2, || { Cell::new("two") });
assert!(cache.find(&1).is_some());
assert!(cache.find(&2).is_some());
}
@ -44,7 +44,7 @@ fn test_lru_cache() {
assert!(cache.find(&4).is_some()); // (2, 4) (no change)
// Test find_or_create.
cache.find_or_create(&1, |_| { Cell::new("one") }); // (4, 1)
cache.find_or_create(1, || { Cell::new("one") }); // (4, 1)
assert!(cache.find(&1).is_some()); // (4, 1) (no change)
assert!(cache.find(&2).is_none()); // (4, 1) (no change)