simpleShuntingYardPseudo

simpleShuntingYardPseudo

While there are tokens to be read:
	Read a token.
	If the token is a number, then add it to the output queue.
	If the token is an operator, o1, then:
		while there is an operator token, o2, at the top of the operator stack, and
		o1 has precedence less than or equal to that of o2,
			pop o2 off the stack, onto the output queue;
		push o1 onto the stack.
When there are no more tokens to read:
	While there are still operator tokens in the stack:
		Pop the operator onto the output queue.
Exit.