struct EntropyContext<'a>(&'a String);

struct Test<'a> {
    mutable_entropy: &'a mut String,
    rng: String,
}

impl<'a> Test<'a> {
    fn new(entropy: &'a mut String, rng: String) -> Test<'a> {
        Test {
            mutable_entropy: entropy,
            rng: rng
        }
    }

    fn update(&mut self, new_entropy: &str) {
        self.mutable_entropy.push_str(new_entropy);
    }
}


fn new_tls_random<'a>() -> Test<'a> {
    let eref: &'a mut String;
    let mut entropy: String = String::from("test");
    eref = &mut entropy;
    let rng = String::from("rng");
    let test = Test::new(eref, rng);
    return test;
}

fn main() {
    let mut c = EntropyContext();
    let mut ntr = new_tls_random(&c);
    ntr.update("test");
}