bfcc

A Brainfuck interpreter, transpiler and inspector written in Rust

Usage

Installation

You can install the newest published version of the binary by running:

cargo install bfcc

Commands

• bfcc transpile - a Brainfuck to C optimizing transpiler
• bfcc run - a Brainfuck interpreter
• bfcc spy - a runtime inspector and soon to be debugger

Optimization

During transpilation the AST gets converted into an intermediary representation that gets optimized in multiple passes.

Although I haven't tested these optimizations enough to provide any sort of guarantee, these optimizations all seem to generate functionally equivalent programs.

Implementation status

	Strategy	File
✅	Fusing increment/decrement commands	fuse_add.rs
✅	Fusing movements	fuse_movements.rs
✅	Deferring movements	defer_movements.rs
✅	Unrolling zero/clear loops	unroll_zero_loops.rs
	Unrolling copy loops
	Unrolling multiplication loops

^{All transforms can be found under src/transpiler/transforms}

References

These websites have served as great references during development:

• Calmer than you are - Brainfuck optimization strategies
• Project Nayuki - Optimizing brainfuck compiler

Todo

• Start implementing optimizations
• Implement breakpoints, single stepping and register peeking in debugger
• Add a command that generates LLVM IR, and compiles to a binary

🧠 🦀

# 𝖆𝖉𝖉𝖊𝖓𝖉𝖚𝖒

+ By the way yes I've seen bfc (https://bfc.wilfred.me.uk),
+ and it's totally amazing

- but I didn't see it until after I had written most of this project
- and picked a name on crates.io

@@ Sue me @@

! 😓