TPC Compiler

A very small subset of C (Très Petit C)

by notKamui & ZwenDo, syntax defined by the Université Gustave Eiffel

Summary

• The Language
• Requirements
• Compiling the Compiler
• Usage
• Sample

The Language

TPC, which stands for "Très Petit C", is an extremely small and unusable subset of C.

It only exists as a very interesting exercise on syntax analysis, finite state machines and compilation to nasm x86-64.

The grammar of the language is defined in ./src/parser.y.

It has no data structures except for structs (which are non recursive nor nested), and has no for loops, nor pointers. The only two primitives are int and char, and the only control flow instructions are if, else, and while. The rest of the syntax is vastly equivalent to that of C.

Requirements

• Make sure you're on a *nix system (Linux, MacOS, etc)
• Make sure you have a recent version of gcc installed
• Make sure you have make installed

Compiling the Compiler

Just make in the root of this project. The binary of the compiler will be located in ./bin/.

Usage

Usage: tpcc [OPTIONS] [file]

OPTIONS:
-t: Prints the AST of the selected program
-s: Prints the symbol table of the selected program
-n: No output (prevents creating an asm file)
-x: produces an executable file
-h: Prints this message
tpcc can also receive its input feed from stdin

Sample

A good sample is given in ./sample/mini_game.tpc. It's a valid tpc program that you can compile and execute (it's a Guess The Number game).

Compile and execute it with the following commands:

tpcc -nx sample/mini_game.tpc
./mini_game