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, 2009 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 3, 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 COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <functional>
  22 #include <system_error>
  23 #include <testsuite_hooks.h>
  24
  25 template<typename T>
  26   void
  27   do_test()
  28   {
  29     bool test __attribute__((unused)) = true;
  30
  31     typedef T                           value_type;
  32     typedef std::hash<value_type>       hash_type;
  33     using std::size_t;
  34
  35     value_type v; // default initialized is fine, same value all that matters.
  36     hash_type h1;
  37     size_t r1 = size_t(h1(v));
  38
  39     hash_type h2;
  40     size_t r2 = size_t(h2(v));
  41
  42     VERIFY( r1 == r2 );
  43   }
  44
  45 void test01()
  46 {
  47   do_test<std::error_code>();
  48 }
  49
  50 int main()
  51 {
  52   test01();
  53   return 0;
  54 }