rust-bfi

Simple and fast Brainfuck interpreter perfectly suited for machine learning needs.

Example

```rust extern crate bfi;

use bfi::{BfMachine, b};

let code = b("++++[->,.<]"); // b converts an &str to a byte vector: pub fn b(s: &str) -> Vec<u8> let input = b("hello"); let mut output = Vec::new();

let capacity = 2; // like in `Vec::withcapacity() let mut machine = BfMachine::new(capacity); let res = machine.exec(&code, &input, &mut output);

asserteq!(output, b("hell")); asserteq!(res, Ok(4));

```

Implementation details

• The memory tape is infinitely long to the right.
• Going to the left of the starting cell causes an Err(BfError::Memory).
• Cells can hold values from 0 to 255.
• Addition and subtraction over- and underflow silently.
• End of input results in an early return.

Why another Brainfuck interpreter?

I like idea of Brainfuck as an environment for reinforcement learning. After searching crates, I have't found anything decent for interpreting BF in runtime, so I've written this little thing.