const regexp/syntax.OpBeginLine

4 uses

	regexp/syntax (current package)
		compile.go#L114: 	case OpBeginLine:
		parse.go#L750: 				p.op(OpBeginLine)
		regexp.go#L45: 	OpBeginLine                    // matches empty string at beginning of line
		regexp.go#L169: 	case OpBeginLine:

The pages are generated with Golds v0.2.8-preview. (GOOS=darwin GOARCH=arm64)