Method stepEmpty

regexp/match.go:148–153

stepEmpty steps runq to nextq expanding according to flag.

(runq, nextq *sparse.Set, flag syntax.EmptyOp)

// stepEmpty steps runq to nextq expanding according to flag.
func (m *matcher) stepEmpty(runq, nextq *sparse.Set, flag syntax.EmptyOp) {
	nextq.Reset()
	for _, id := range runq.Dense() {
		m.addq(nextq, id, flag)
	}
}

// stepByte steps runq to nextq consuming c and then expanding according to flag.
// It returns true if a match ends immediately before c.