libstdc++-v3/testsuite/18_support/set_unexpected.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-options "-std=gnu++11" }
  19 // { dg-do run { target { c++11_only || c++14_only } } }
  20
  21 #include <exception>
  22 #include <testsuite_hooks.h>
  23
  24 void unex_handler() { __builtin_abort(); }
  25
  26 void
  27 test01()
  28 {
  29   const std::unexpected_handler orig = std::get_unexpected();
  30   VERIFY( orig == std::terminate ); // GNU-specific behaviour
  31
  32   std::unexpected_handler prev = std::set_unexpected(unex_handler);
  33   VERIFY( std::get_unexpected() == unex_handler );
  34   VERIFY( prev == orig );
  35
  36   prev = std::set_unexpected(orig);
  37   VERIFY( std::get_unexpected() == orig );
  38   VERIFY( prev == unex_handler );
  39 }
  40
  41 void
  42 test02()
  43 {
  44   // PR libstdc++/90682
  45   std::set_unexpected(0); // Undefined in C++98, unspecified in C++11 and C++14
  46   const std::unexpected_handler dfault = std::get_unexpected();
  47   VERIFY( dfault == std::terminate ); // GNU-specific behaviour
  48   const std::unexpected_handler prev = std::set_unexpected(0);
  49   VERIFY( prev == dfault );
  50 }
  51
  52 int
  53 main()
  54 {
  55   test01();
  56   test02();
  57 }