in lib/src/parser.dart [53:67]
AstNode _parseNode({bool inOptions = false}) {
var star = _parseStar();
if (star != null) return star;
var anyChar = _parseAnyChar();
if (anyChar != null) return anyChar;
var range = _parseRange();
if (range != null) return range;
var options = _parseOptions();
if (options != null) return options;
return _parseLiteral(inOptions: inOptions);
}