| // Copyright 2012 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::collections::HashSet; |
| |
| struct Foo { |
| n: HashSet<isize>, |
| } |
| |
| impl Foo { |
| pub fn foo<F>(&mut self, mut fun: F) where F: FnMut(&isize) { |
| for f in &self.n { |
| fun(f); |
| } |
| } |
| } |
| |
| fn bar(f: &mut Foo) { |
| f.foo( |
| |a| { //~ ERROR closure requires unique access to `f` |
| f.n.insert(*a); |
| }) |
| } |
| |
| fn main() { |
| let mut f = Foo { n: HashSet::new() }; |
| bar(&mut f); |
| } |