src/test/compile-fail/issue-21600.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 fn call_it<F>(f: F) where F: Fn() { f(); }
  12
  13 struct A;
  14
  15 impl A {
  16     fn gen(&self) {}
  17     fn gen_mut(&mut self) {}
  18 }
  19
  20 fn main() {
  21     let mut x = A;
  22     call_it(|| {    //~ HELP consider changing this to accept closures that implement `FnMut`
  23         call_it(|| x.gen());
  24         call_it(|| x.gen_mut()); //~ ERROR cannot borrow data mutably in a captured outer
  25         //~^ ERROR cannot borrow data mutably in a captured outer
  26         //~^^ HELP run `rustc --explain E0387` to see a detailed explanation
  27         //~^^^ HELP run `rustc --explain E0387` to see a detailed explanation
  28         //~^^^^ HELP consider changing this closure to take self by mutable reference
  29     });
  30 }