libstdc++-v3/testsuite/20_util/hash/operators/size_t.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // 2007-08-20  <benjamin@redhat.com>
   3 //
   4 // Copyright (C) 2007 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 #include <functional>
  23 #include <system_error>
  24 #include <testsuite_hooks.h>
  25
  26 template<typename T>
  27   void
  28   do_test()
  29   {
  30     bool test __attribute__((unused)) = true;
  31
  32     typedef T                           value_type;
  33     typedef std::hash<value_type>       hash_type;
  34     using std::size_t;
  35
  36     value_type v; // default initialized is fine, same value all that matters.
  37     hash_type h1;
  38     size_t r1 = size_t(h1(v));
  39
  40     hash_type h2;
  41     size_t r2 = size_t(h2(v));
  42
  43     VERIFY( r1 == r2 );
  44   }
  45
  46 void test01()
  47 {
  48   do_test<std::error_code>();
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }