package remap

// idx returns []int{s.start, s.end}.
func (s *stringIndexer) idx() (i []int) {
	return []int{s.start, s.end}
}

// idxStrict returns [2]int{s.start, s.end}.
func (s *stringIndexer) idxStrict() (i [2]int) {
	return [2]int{s.start, s.end}
}

/*
idxSlice populates s.grpS using s.start and s.end.

If str is nil, it will use s.s.
If str is nil and s.s is nil, it will panic with [ErrNoStr].

If the pattern does not match (s.start < 0 or s.end < 0),
s.matched will be set to false (otherwise true).
*/
func (s *stringIndexer) idxSlice(str *string) {

	if str == nil {
		if s.s == nil {
			panic(ErrNoStr)
		}
		str = s.s
	}

	s.grpS, s.matched = strIdxSlicer(*str, s.idxStrict())

	return
}