Simple Forth Interpreter written in Python

Based on http://moi2.sakura.ne.jp/fswiki/wiki.cgi?page=Forth%A4%F2%BA%EE%A4%C3%A4%C6%A4%DF%A4%EB

Usage:

• python main.py to activate REPL
• python main.py samples/sample1.forth to run single source file

Currently implements:

• Pushing integers to stack
• Adding two integers on the stack
• Printing integers from stack
• Carriage return
• Interactive REPL
• IF-ELSE-THEN
• DO-LOOP
• Variable definition, get/set
• User-defined Word

TODO:

• Multi-line REPL input
• Printing strings
• Error handling
• Arithmetic operators
• Stack manipulation operators