l.pos += afterMarker
		l.ignore()
		return lexComment
	}
	i := l.thisItem(itemLeftDelim)
	l.insideAction = true
	l.pos += afterMarker
	l.ignore()
	l.parenDepth = 0
	return l.emitItem(i)
}

// lexComment scans a comment. The left comment marker is known to be present.
func lexComment(l *lexer) stateFn {
	l.pos += Pos(len(leftComment))