src/test/run-pass/unboxed-closures-call-sugar-object-autoderef.rs

   1 // Copyright 2012 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 // Test that the call operator autoderefs when calling to an object type.
  12
  13 #![allow(unknown_features)]
  14
  15 use std::ops::FnMut;
  16
  17 fn make_adder(x: isize) -> Box<FnMut(isize)->isize + 'static> {
  18     Box::new(move |y| { x + y })
  19 }
  20
  21 pub fn main() {
  22     let mut adder = make_adder(3);
  23     let z = adder(2);
  24     println!("{}", z);
  25     assert_eq!(z, 5);
  26 }