sl4mmy / teenytinycompiler

A small BASIC-to-C compiler written in Python

teenytinycompiler

This is a small compiler to demonstrate how compilers work to my students. It compiles our own dialect of BASIC to C, while being written in Python.

Read the tutorial: Let's make a Teeny Tiny compiler, part 1 as well as part 2 and part 3

The code is split into folders (part1, part2, part3) that correspond with the complete code from the parts of the tutorial. See part3 for the finished compiler.

It supports:

• Numerical variables
• Basic arithmetic
• If statements
• While loops
• Print text and numbers
• Input numbers
• Labels and goto
• Comments

Example code:

PRINT "How many fibonacci numbers do you want?"
INPUT nums
PRINT ""

LET a = 0
LET b = 1
WHILE nums > 0 REPEAT
    PRINT a
    LET c = a + b
    LET a = b
    LET b = c
    LET nums = nums - 1
ENDWHILE