Using flex and bison, lets say I want to parse my input file:

3 + 1;

2 + 1; ?

The goal is to parse through each line until the ‘?’ symbol is reached. Leaving the output file to evaluate the expressions.

However, with my code I have it programmed to stop at the semicolon, so my output is only the first evaluated expression.

Is there a simple way I can make a token for ‘?’ that will tell my program to terminate?