const regexp/syntax.EmptyBeginText

12 uses

	regexp/syntax (current package)
		compile.go#L120: 		return c.empty(EmptyBeginText)
		prog.go#L68: 	EmptyBeginText
		prog.go#L89: 		op |= EmptyBeginText | EmptyBeginLine
		prog.go#L272: 	case EmptyBeginText:

	regexp
		backtrack.go#L312: 	if startCond&syntax.EmptyBeginText != 0 && pos != 0 {
		backtrack.go#L322: 	if startCond&syntax.EmptyBeginText != 0 {
		exec.go#L139: 	if op&syntax.EmptyBeginText != 0 {
		exec.go#L143: 		op &^= syntax.EmptyBeginText
		exec.go#L199: 			if startCond&syntax.EmptyBeginText != 0 && pos != 0 {
		onepass.go#L43: 	if i.Op != syntax.InstEmptyWidth || (syntax.EmptyOp(i.Arg))&syntax.EmptyBeginText == 0 {
		onepass.go#L472: 		syntax.EmptyOp(prog.Inst[prog.Start].Arg)&syntax.EmptyBeginText != syntax.EmptyBeginText {

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