libstdc++-v3/testsuite/19_diagnostics/error_code/modifiers/39882.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2009-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <system_error>
  21 #include <testsuite_hooks.h>
  22
  23 enum my_errc { my_err = 0 };
  24
  25 class my_error_category_impl
  26 : public std::error_category
  27 {
  28 public:
  29   const char* name() const noexcept { return ""; }
  30   std::string message(int) const { return ""; }
  31 } my_error_category_instance;
  32
  33 std::error_code
  34 make_error_code(my_errc e)
  35 {
  36   return std::error_code(static_cast<int>(e),
  37                          my_error_category_instance);
  38 }
  39
  40 namespace std
  41 {
  42   template<>
  43     struct is_error_code_enum<my_errc>
  44     : public true_type {};
  45 }
  46
  47 // libstdc++/39882
  48 void test01()
  49 {
  50   std::error_code ec2;
  51   ec2 = my_err;
  52   VERIFY( ec2 == make_error_code(my_err) );
  53 }
  54
  55 int main()
  56 {
  57   test01();
  58   return 0;
  59 }