gdb/testsuite/gdb.rust/unsized.rs

   1 // Copyright (C) 2017-2019 Free Software Foundation, Inc.
   2
   3 // This program is free software; you can redistribute it and/or modify
   4 // it under the terms of the GNU General Public License as published by
   5 // the Free Software Foundation; either version 3 of the License, or
   6 // (at your option) any later version.
   7 //
   8 // This program is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 // GNU General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 #![allow(dead_code)]
  17 #![allow(unused_variables)]
  18 #![allow(unused_assignments)]
  19
  20 struct V<T: ?Sized> {
  21     data: T,
  22 }
  23
  24 type Unsized = V<[u8]>;
  25
  26 fn ignore<T>(x: T) { }
  27
  28 fn main() {
  29     let v: Box<V<[u8; 3]>> = Box::new(V { data: [1, 2, 3] });
  30     let us: Box<Unsized> = v;
  31
  32     ignore(us);     // set breakpoint here
  33 }