calc

flex and bison calculator demonstrating polymorphism in the abstract syntax tree

The original code comes from “flex & bison”. I though that I would implement the abstract syntax tree with a polymorphic class.

In order to build ‘calc’ from qt creator you’ll need to add two custom build steps. One for bison and one for flex and in that order. These build steps have to happen before anything else.
The command for bison is

bison -o parser.cpp -d parser.ypp

The command for flex is

flex -o lexer.cpp lexer.l

The working directory for both steps is

%{sourceDir}