How can I modify my Shunting-Yard Algorithm so it accepts unary operators?

Question

I\'ve been working on implementing the Shunting-Yard Algorithm in JavaScript for class.

Here is my work so far:

var userInput = prompt(\"Enter in a m         


        

Answer 1

When I needed to support this, I did this in an intermediate stage. I started by generating a list of all expression lexemes, then used helper functions to extract operators and operands and the "get operand" function simply consumed two lexemes whenever it saw a unary operator.

It really helps if you use another character to signify "unary minus", though.