libstdc++-v3/testsuite/19_diagnostics/system_error/what-3.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2007, 2009, 2010
   4 // 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 <string>
  22 #include <system_error>
  23 #include <cstring>
  24 #include <testsuite_hooks.h>
  25
  26 // test copy ctors, assignment operators, and persistence of member string data
  27 // libstdc++/1972
  28 // via Greg Bumgardner <bumgard@roguewave.com>
  29 void allocate_on_stack(void)
  30 {
  31   const size_t num = 512;
  32   __extension__ char array[num];
  33   for (size_t i = 0; i < num; i++)
  34     array[i]=0;
  35   // Suppress unused warnings.
  36   for (size_t i = 0; i < num; i++)
  37     array[i]=array[i];
  38 }
  39
  40 void test04()
  41 {
  42   bool test __attribute__((unused)) = true;
  43   const std::string s("CA ISO emergency once again:immediate power down");
  44   const char* strlit1 = "wish I lived in Palo Alto";
  45   const char* strlit2 = "...or Santa Barbara";
  46   std::system_error obj1(std::error_code(), s);
  47
  48   // block 01
  49   {
  50     const std::string s2(strlit1);
  51     std::system_error obj2(std::error_code(), s2);
  52     obj1 = obj2;
  53   }
  54   allocate_on_stack();
  55   VERIFY( std::strcmp(strlit1, obj1.what()) == 0 );
  56
  57   // block 02
  58   {
  59     const std::string s3(strlit2);
  60     std::system_error obj3 = std::system_error(std::error_code(), s3);
  61     obj1 = obj3;
  62   }
  63   allocate_on_stack();
  64   VERIFY( std::strcmp(strlit2, obj1.what()) == 0 );
  65 }
  66
  67 int main(void)
  68 {
  69   test04();
  70   return 0;
  71 }