libstdc++-v3/testsuite/19_diagnostics/error_code/hash.cc

   1 // Copyright (C) 2019-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++11 } }
  19
  20 #include <system_error>
  21 #include <testsuite_hooks.h>
  22
  23 struct error_cat : std::error_category
  24 {
  25   error_cat(std::string s) : _name(s) { }
  26   std::string _name;
  27   const char* name() const noexcept override { return _name.c_str(); }
  28   std::string message(int) const override { return "error"; }
  29 };
  30
  31 void
  32 test01()
  33 {
  34   std::hash<std::error_code> h;
  35   error_cat kitty("kitty"), moggy("moggy");
  36   std::error_code cond1(99, kitty);
  37   VERIFY( h(cond1) == h(cond1) );
  38   std::error_code cond2(99, kitty);
  39   VERIFY( h(cond1) == h(cond2) );
  40   std::error_code cond3(88, kitty);
  41   VERIFY( h(cond1) != h(cond3) );
  42   std::error_code cond4(99, moggy);
  43   VERIFY( h(cond1) != h(cond4) );
  44 }
  45
  46 int
  47 main()
  48 {
  49   test01();
  50 }