src/test/compile-fail/dst-bad-coerce3.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 // Attempt to extend the lifetime as well as unsizing.
  12
  13 #![feature(unsized_tuple_coercion)]
  14
  15 struct Fat<T: ?Sized> {
  16     ptr: T
  17 }
  18
  19 struct Foo;
  20 trait Bar { fn bar(&self) {} }
  21 impl Bar for Foo {}
  22
  23 fn baz<'a>() {
  24     // With a vec of ints.
  25     let f1 = Fat { ptr: [1, 2, 3] };
  26     let f2: &Fat<[isize; 3]> = &f1; //~ ERROR `f1` does not live long enough
  27     let f3: &'a Fat<[isize]> = f2;
  28
  29     // With a trait.
  30     let f1 = Fat { ptr: Foo };
  31     let f2: &Fat<Foo> = &f1; //~ ERROR `f1` does not live long enough
  32     let f3: &'a Fat<Bar> = f2;
  33
  34     // Tuple with a vec of ints.
  35     let f1 = ([1, 2, 3],);
  36     let f2: &([isize; 3],) = &f1; //~ ERROR `f1` does not live long enough
  37     let f3: &'a ([isize],) = f2;
  38
  39     // Tuple with a trait.
  40     let f1 = (Foo,);
  41     let f2: &(Foo,) = &f1; //~ ERROR `f1` does not live long enough
  42     let f3: &'a (Bar,) = f2;
  43 }
  44
  45 pub fn main() {
  46     baz();
  47 }