# Crafting Interpreters

Using rust to implement the first part of
[Crafting interpreters](https://craftinginterpreters.com) for the
[FHNW](https://www.fhnw.ch) [PL-Circle](https://github.com/fhnw-pl-circle).

All dependencies for running the respective implementations are specified in the
[flake.nix](./flake.nix) file within the project folder (look for the key
`buildInputs`, though [rustup](https://rustup.rs/) might just work with the
provided toolchain file). My recommendation is to use the provided
[nix flake](https://nixos.wiki/wiki/Flakes) directly, as it sets up everything
automatically.

Use `cargo run -- <ARGS>` to run the interpreter directly from the source code.
Specify needed arguments in place of `<ARGS>`.

```
Usage: rox <COMMAND>

Commands:
  run      Run a Lox source file
  repl     Run a Lox REPL
  help     Print this message or the help of the given subcommand(s)

Options:
  -h, --help     Print help
  -V, --version  Print version
```

For example running the
[Game of Life](https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life)
implemented in [brainfuck](https://en.wikipedia.org/wiki/Brainfuck) (read the
[source file](bf/game_of_life.bf) to figure out how to use it):

```
RUST_LOG=info cargo run --release -- run -s ./lox/bf.lox -- bf/game_of_life.bf
```

Please note that some parts of the implementation have not been given enough
thought.