src/test/parse-fail/regions-trait-2.rs

   1 // Copyright 2012-2014 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 // compile-flags: -Z parse-only
  12
  13 // ignore-test #5723
  14
  15 // Test that you cannot escape a reference
  16 // into a trait.
  17
  18 struct ctxt { v: usize }
  19
  20 trait get_ctxt {
  21     fn get_ctxt(&self) -> &'a ctxt;
  22 }
  23
  24 struct has_ctxt<'a> { c: &'a ctxt }
  25
  26 impl<'a> get_ctxt for has_ctxt<'a> {
  27     fn get_ctxt(&self) -> &'a ctxt { self.c }
  28 }
  29
  30 fn make_gc() -> @get_ctxt  {
  31     let ctxt = ctxt { v: 22 };
  32     let hc = has_ctxt { c: &ctxt };
  33     return @hc as @get_ctxt;
  34     //~^ ERROR source contains reference
  35 }
  36
  37 fn main() {
  38     make_gc().get_ctxt().v;
  39 }