python-rust-parser

A Rust parser written in Python

Not to be confused with rust-python-parser, which is a Python parser written in Rust (ie. the opposite of this).

The plan

1. Basic reimplementation of GLL
2. Use it to generate a parser and a CST from the Rust grammar
3. Rewrite the CST into an AST

Motivation

I want to write a Rust interpreter in Python, to bootstrap Rust, as an alternative to mrustc that may be easier (or not) to maintain.

Either way, it's a fun exercise.

How to use

Don't

How to run tests

1. Install Python from https://github.com/brandtbucher/cpython/tree/patma , for example:
   1. cd ~
   2. git clone https://github.com/brandtbucher/cpython.git cpython-patma
   3. cd cpython-patma
   4. git checkout 19af7d547e094006bfdc40a358385ad49503c597
   5. ./configure --prefix=$HOME/.local/
   6. make -j 4
   7. make install
2. Clone this repo: git clone https://github.com/ProgVal/python-rust-parser.git; cd python-rust-parser
3. Fetch submodules (to get the rust grammar): git submodule update --init (don't use --recursive or it will fetch all rustc's git repo!)
4. Install dependencies:
   1. ~/.local/bin/python -m ensurepip
   2. ~/.local/bin/python -m pip install pytest tatsu
5. Run pytest: ~/.local/bin/python -m pytest