Based on https://github.com/tedsta/rust-brainfuck/

rust-brainfuck.rs

use std::io;

fn main() {
    eval(bytes!("++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.")); // I stole this off of wikipedia, sorry, wikipedia :(
}

fn eval(program: &[u8]) {
    let mut pointer = 0u;
    let mut memory = [0u8, ..1024];
    let mut jmp_stack = vec!();
    let mut instr = 0u;

    while instr < program.len() {
        let command = program[instr] as char;
        match command {
            '>' => pointer += 1,
            '<' if pointer > 0 => pointer -= 1,
            '+' => memory[pointer] += 1,
            '-' if memory[pointer] > 0 => memory[pointer] -= 1,
            '.' => print!("{}", memory[pointer] as char),
            ',' => memory[pointer] = io::stdin().read_byte().unwrap(),
            '[' if memory[pointer] == 0 => {
                while program[instr] as char != ']' {
                    instr += 1;
                }
            },
            '[' => jmp_stack.push(instr),
            ']' if memory[pointer] != 0 => {
                instr = jmp_stack.pop().unwrap();
                continue;
            }
            ']' => { jmp_stack.pop(); },
            _ => { /* ignore everything else */ },
        }
        instr += 1;
    }
}