const regexp/syntax.OpEmptyMatch

17 uses

	regexp/syntax (current package)
		compile.go#L93: 	case OpEmptyMatch:
		op_string.go#L12: 	_ = x[OpEmptyMatch-2]
		parse.go#L493: 		return p.push(p.newRegexp(OpEmptyMatch))
		parse.go#L769: 		if i+1 < len(sub) && sub[i].Op == OpEmptyMatch && sub[i+1].Op == OpEmptyMatch {
		parse.go#L800: 		if sub.Op == OpEmptyMatch {
		parse.go#L805: 				re.Op = OpEmptyMatch
		parse.go#L822: 			re.Op = OpEmptyMatch
		parse.go#L831: 	if re.Op == OpEmptyMatch {
		parse.go#L836: 		if sub.Op == OpEmptyMatch {
		parse.go#L855: 			re.Op = OpEmptyMatch
		parse.go#L867: 	return p.newRegexp(OpEmptyMatch)
		regexp.go#L40: 	OpEmptyMatch                   // matches empty string
		regexp.go#L122: 	case OpEmptyMatch:
		regexp.go#L193: 		if re.Sub[0].Op != OpEmptyMatch {
		simplify.go#L45: 			return &Regexp{Op: OpEmptyMatch}
		simplify.go#L137: 	if sub.Op == OpEmptyMatch {

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