const regexp/syntax.OpConcat

16 uses

	regexp/syntax (current package)
		compile.go#L137: 	case OpConcat:
		parse.go#L307: 	return p.push(p.collapse(subs, OpConcat))
		parse.go#L455: 			re := p.newRegexp(OpConcat)
		parse.go#L512: 			re := p.newRegexp(OpConcat)
		parse.go#L587: 	if re.Op == OpConcat && len(re.Sub) > 0 {
		parse.go#L599: 	if re.Op == OpConcat && len(re.Sub) > 0 {
		parse.go#L639: 	if re.Op == OpConcat && len(re.Sub) > 0 {
		parse.go#L653: 	if re.Op == OpConcat && len(re.Sub) > 0 {
		regexp.go#L56: 	OpConcat                       // matches concatenation of Subs
		regexp.go#L87: 	case OpAlternate, OpConcat:
		regexp.go#L226: 	case OpConcat:
		simplify.go#L19: 	case OpCapture, OpConcat, OpAlternate:
		simplify.go#L64: 			nre := &Regexp{Op: OpConcat}
		simplify.go#L87: 			prefix = &Regexp{Op: OpConcat}
		simplify.go#L98: 				nre2 := &Regexp{Op: OpConcat}

	regexp
		regexp.go#L286: 	case syntax.OpConcat:

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