src/test/run-pass/issue-6157.rs

   1 // Copyright 2014 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 // pretty-expanded FIXME #23616
  12
  13 pub trait OpInt { fn call(&mut self, _: isize, _: isize) -> isize; }
  14
  15 impl<F> OpInt for F where F: FnMut(isize, isize) -> isize {
  16     fn call(&mut self, a:isize, b:isize) -> isize {
  17         (*self)(a, b)
  18     }
  19 }
  20
  21 fn squarei<'a>(x: isize, op: &'a mut OpInt) -> isize { op.call(x, x) }
  22
  23 fn muli(x:isize, y:isize) -> isize { x * y }
  24
  25 pub fn main() {
  26     let mut f = |x, y| muli(x, y);
  27     {
  28         let g = &mut f;
  29         let h = g as &mut OpInt;
  30         squarei(3, h);
  31     }
  32 }