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// Copyright 2014 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;
// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
fn main() {
let mut y = 1;
let c = RefCell::new(vec![]);
c.push(Box::new(|| y = 0));
c.push(Box::new(|| y = 0));
//~^ ERROR cannot borrow `y` as mutable more than once at a time
}
fn ufcs() {
let mut y = 1;
let c = RefCell::new(vec![]);
Push::push(&c, Box::new(|| y = 0));
Push::push(&c, Box::new(|| y = 0));
//~^ ERROR cannot borrow `y` as mutable more than once at a time
}
trait Push<'c> {
fn push<'f: 'c>(&self, push: Box<FnMut() + 'f>);
}
impl<'c> Push<'c> for RefCell<Vec<Box<FnMut() + 'c>>> {
fn push<'f: 'c>(&self, fun: Box<FnMut() + 'f>) {
self.borrow_mut().push(fun)
}
}
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