src/test/ui/span/regions-close-over-type-parameter-2.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 #![feature(box_syntax)]
  12
  13 // Test for what happens when a type parameter `A` is closed over into
  14 // an object. This should yield errors unless `A` (and the object)
  15 // both have suitable bounds.
  16
  17 trait Foo { fn get(&self); }
  18
  19 impl<A> Foo for A {
  20     fn get(&self) { }
  21 }
  22
  23 fn repeater3<'a,A:'a>(v: A) -> Box<Foo+'a> {
  24     box v as Box<Foo+'a>
  25 }
  26
  27 fn main() {
  28     // Error results because the type of is inferred to be
  29     // ~Repeat<&'blk isize> where blk is the lifetime of the block below.
  30
  31     let _ = {
  32         let tmp0 = 3;
  33         let tmp1 = &tmp0; //~ ERROR `tmp0` does not live long enough
  34         repeater3(tmp1)
  35     };
  36 }