libstdc++-v3/testsuite/22_locale/locale/global_locale_objects/3.cc

   1 // 2000-09-13 Benjamin Kosnik <bkoz@redhat.com>
   2
   3 // Copyright (C) 2000, 2002, 2003 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 22.1.1.5 locale static members [lib.locale.statics]
  22
  23 #include <cwchar> // for mbstate_t
  24 #include <locale>
  25 #include <testsuite_hooks.h>
  26
  27 // Static counter for use in checking ctors/dtors.
  28 static std::size_t counter;
  29
  30 class surf : public std::locale::facet
  31 {
  32 public:
  33   static std::locale::id                id;
  34   surf(size_t refs = 0): std::locale::facet(refs) { ++counter; }
  35   ~surf() { --counter; }
  36 };
  37
  38 std::locale::id surf::id;
  39
  40 typedef surf facet_type;
  41
  42 // Verify lifetimes of global objects.
  43 void test03()
  44 {
  45   using namespace std;
  46   bool test __attribute__((unused)) = true;
  47
  48   string name;
  49   locale global_orig;
  50   // 1: Destroyed when out of scope.
  51   {
  52     {
  53       {
  54         VERIFY( counter == 0 );
  55         {
  56           locale loc01(locale::classic(), new facet_type);
  57           VERIFY( counter == 1 );
  58           global_orig = locale::global(loc01);
  59           name = loc01.name();
  60         }
  61         VERIFY( counter == 1 );
  62         locale loc02 = locale();
  63         // Weak, but it's something...
  64         VERIFY( loc02.name() == name );
  65       }
  66       VERIFY( counter == 1 );
  67       // NB: loc03 should be a copy of the previous global locale.
  68       locale loc03 = locale::global(global_orig);
  69       VERIFY( counter == 1 );
  70       VERIFY( loc03.name() == name );
  71     }
  72     VERIFY( counter == 0 );
  73     locale loc04 = locale();
  74     VERIFY( loc04 == global_orig );
  75   }
  76
  77   // 2: Not destroyed when out of scope, deliberately leaked.
  78   {
  79     {
  80       {
  81         VERIFY( counter == 0 );
  82         {
  83           locale loc01(locale::classic(), new facet_type(1));
  84           VERIFY( counter == 1 );
  85           global_orig = locale::global(loc01);
  86           name = loc01.name();
  87         }
  88         VERIFY( counter == 1 );
  89         locale loc02 = locale();
  90         // Weak, but it's something...
  91         VERIFY( loc02.name() == name );
  92       }
  93       VERIFY( counter == 1 );
  94       // NB: loc03 should be a copy of the previous global locale.
  95       locale loc03 = locale::global(global_orig);
  96       VERIFY( counter == 1 );
  97       VERIFY( loc03.name() == name );
  98     }
  99     VERIFY( counter == 1 );
 100     locale loc04 = locale();
 101     VERIFY( loc04 == global_orig );
 102   }
 103   VERIFY( counter == 1 );
 104
 105   // Restore global settings.
 106   locale::global(global_orig);
 107 }
 108
 109 int main ()
 110 {
 111   test03();
 112   return 0;
 113 }