const regexp/syntax.opPseudo

6 uses

	regexp/syntax (current package)
		op_string.go#L30: 	_ = x[opPseudo-128]
		parse.go#L77: 	opLeftParen = opPseudo + iota
		parse.go#L422: 	if sub.Op >= opPseudo {
		parse.go#L481: 	for i > 0 && p.stack[i-1].Op < opPseudo {
		parse.go#L500: 	for i > 0 && p.stack[i-1].Op < opPseudo {
		regexp.go#L61: const opPseudo Op = 128 // where pseudo-ops start