src/test/run-pass/regions-static-bound.rs

   1 // Copyright 2015 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 fn invariant_id<'a,'b>(t: &'b mut &'static ()) -> &'b mut &'a ()
  12     where 'a: 'static { t }
  13 fn static_id<'a>(t: &'a ()) -> &'static ()
  14     where 'a: 'static { t }
  15 fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
  16     where 'a: 'b, 'b: 'static { t }
  17 fn ref_id<'a>(t: &'a ()) -> &'a () where 'static: 'a { t }
  18
  19 static UNIT: () = ();
  20
  21 fn main()
  22 {
  23     let mut val : &'static () = &UNIT;
  24     invariant_id(&mut val);
  25     static_id(val);
  26     static_id_indirect(val);
  27     ref_id(val);
  28 }