Method union

index/regexp.go:831–835

union returns the union of s and t, reusing s's storage.

(t stringSet, isSuffix bool)

// union returns the union of s and t, reusing s's storage.
func (s stringSet) union(t stringSet, isSuffix bool) stringSet {
	s = append(s, t...)
	s.clean(isSuffix)
	return s
}

// cross returns the cross product of s and t.
func (s stringSet) cross(t stringSet, isSuffix bool) stringSet {