src/test/ui/nll/capture-ref-in-struct.rs

   1 // Copyright 2016 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 a structure which tries to store a pointer to `y` into
  12 // `p` (indirectly) fails to compile.
  13
  14 #![feature(rustc_attrs)]
  15 #![feature(nll)]
  16
  17 struct SomeStruct<'a, 'b: 'a> {
  18     p: &'a mut &'b i32,
  19     y: &'b i32,
  20 }
  21
  22 fn test() {
  23     let x = 44;
  24     let mut p = &x;
  25
  26     {
  27         let y = 22;
  28
  29         let closure = SomeStruct {
  30             p: &mut p,
  31             y: &y,
  32             //~^ ERROR `y` does not live long enough [E0597]
  33         };
  34
  35         closure.invoke();
  36     }
  37
  38     deref(p);
  39 }
  40
  41 impl<'a, 'b> SomeStruct<'a, 'b> {
  42     fn invoke(self) {
  43         *self.p = self.y;
  44     }
  45 }
  46
  47 fn deref(_: &i32) { }
  48
  49 fn main() { }