EeZee Programming Language

This project is part of the https://compilerprogramming.github.io/ project.

The EeZee programming language is designed to allow us to learn various compiler techniques.

The EeZee Language

The EeZee programming language is a tiny statically typed language with syntax inspired by Swift. The language has the following features:

• Integer, Struct and 1-Dimensional Array types
• If and While statements
• Functions

The EeZee language specification is available. The language is intentionally very simple and is meant to have just enough functionality to experiment with compiler implementation techniques.

Modules

The project is under development and subject to change. At this point in time, we have following initial implementations:

• lexer - a simple tokenizer.
• parser - a recursive descent parser and AST.
• types - the type definitions.
• semantic - semantic analyzer.
• stackvm - a compiler that generates IR for a stack based virtual machine. There is no interpreter for this instruction set yet.
• registervm - a compiler that generates a so called three-address IR and an interpreter that can execute the IR.
• optvm - WIP optimizing compiler with SSA transformation, constant propagation, graph coloring register allocation targeting an abstract machine. Includes Interpreter to run the abstract machine.
• seaofnodes - WIP compiler that generates Sea of Nodes IR, using SoN backend from Simple Chapter 21. Generates native code for X86-64, AArch64 and RISC-V.

How can you contribute?

The project is educational, with a focus on exploring various compiler algorithms and data structures. Clarity and simplicity is preferred over a coding style that attempts to do micro optimizations.

Contributions that improve the quality of the implementation, add test cases / documentation or fix bugs, are very welcome. I am not keen on language extensions at this stage, but eventually we will be extending the language to explore more advanced features.

I am also interested in porting this project to C++, Go, Rust, Swift, D, C, etc. If you are interested in working on such a port please contact me via Discussions.

Community Discussions

There is a community discussion forum.

What's next

The project has only just got started, there is lots to do!. See the plan in the website. More documentation to follow, but for now please refer to the source code and the site above.