Method clean

index/regexp.go:780–795

clean removes duplicates from the stringSet.

(isSuffix bool)

// clean removes duplicates from the stringSet.
func (s *stringSet) clean(isSuffix bool) {
	t := *s
	if isSuffix {
		sort.Sort((*bySuffix)(s))
	} else {
		sort.Sort((*byPrefix)(s))
	}
	w := 0
	for _, str := range t {
		if w == 0 || t[w-1] != str {
			t[w] = str
			w++
		}
	}
	*s = t[:w]
}

// size returns the number of strings in s.
func (s stringSet) size() int {