/**
* Parses the given String to a Reverish Polish Notation Queue according to the Shunting-Yard
* algorithm.
*
* @param expression The String to parse.
* @return The Reverse Polish Notation Queue.
*/
public Queue<Expression> parse(String expression) {
expressions = new Converter().convert(expression);
for (Expression e : expressions) {
e.parse(operators, output);
}
popAll(operators, output);
return output;
}
