mparser.y

input: SExpression {
    std::cout << "Result: ";
};

Part: Symbol | String | Integer {
    std::cout << "Part\n";
}

CallArgs: | CallArgs CallArg;

CallArg: LBRK ArgList RBRK | LBRK RBRK;

ArgList: SExpression | ArgList Comma SExpression;

SExpression: Part CallArgs {
    std::cout << "SExpression\n";
};