public static LNode Parse(UString sexpr, string filename = "", IMessageSink msgs = null)
{
var lexer = LesLanguageService.Value.Tokenize(sexpr, filename, msgs);
var withoutComments = new WhitespaceFilter(lexer).Buffered();
var parser = new SExprParser(withoutComments, lexer.SourceFile, msgs);
return(parser.Atom());
}
