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Types ¶
type RegexpCache ¶
type RegexpCache struct {
// Size is the maximum size of the cache
Size int
// contains filtered or unexported fields
}
RegexpCache caches compilation of regular expressions. Except for modification of Size, it can be used concurrently.
Example ¶
// create a cache of size 2
cache := &RegexpCache{
Size: 2,
}
// compile 'hello' regexp
first, err := cache.Compile("hello")
fmt.Println(first, err)
// compile 'world' regexp
second, err := cache.Compile("world")
fmt.Println(second, err)
// compile 'hello' regexp again
third, err := cache.Compile("hello")
fmt.Println(third, err)
// this is re-using the same regular expression
fmt.Println(unsafe.Pointer(first) == unsafe.Pointer(third))
Output: hello <nil> world <nil> hello <nil> true
func (*RegexpCache) Compile ¶
func (rr *RegexpCache) Compile(src string) (exp *regexp.Regexp, err error)
Compile returns a (possibly cached) compiled version of src. When src is invalid it is never cached.
See regexp.Compile for description of regular expressions.
func (*RegexpCache) Reset ¶
func (rr *RegexpCache) Reset()
Reset removes all cached regular expressions
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