// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::cell::RefCell;
use std::rc::Rc;

pub struct Callbacks {
    callbacks: Vec<Rc<RefCell<FnMut(i32)>>>,
}

impl Callbacks {
    pub fn register<F: FnMut(i32)+'static>(&mut self, callback: F) {
        self.callbacks.push(Rc::new(RefCell::new(callback)));
    }
}

fn main() {}