Compiles Pascal0 to 64-bit NASM assembly code. Started as my final project for McMaster course 4TB3: Syntax-based Tools and Compilers. I've since expanded upon it with a full test suite, refactoring, optimizations, and and usability improvements.

A simplified and fully compatible subset of Pascal (i.e., works with any regular Pascal compiler), created by Dr. Emil Sekerinski for McMaster 4TB3.

Compile a Pascal0 source file to assembly with

python3 compile.py /path/to/my_p0_code.p [options]

There are example Pascal0 programs under test/test_programs.

Requires Python 3+ to compile to assembly. 64-bit Linux with gcc and nasm is required to compile an executable file (not required by default).

-h or --help: show the below option flags

-a or --asm: directory to save generated assembly file (default: current directory)

-e or --exec : directory to save the executable (default: none)

Testing is split into parsing/compiler-time error catching as well as behavior-driven testing of compiled executables. The latter is done by compiling the programs in test/test_programs, which cover all of the structures of the Pascal0 grammar and check for specific behaviors (e.g., passing arguments to procedures, local and global variable scope, code optimizations).

The test suite can be run by navigating to the test directory and running python3 test.py. I suggest using Coverage to verify test completeness. As is, tests cover 100% of code in the parser and code generator.

To learn more about the code generated, calling conventions, register usage, etc., you can view the original documentation here.