main/libstdc++-v3/testsuite/22_locale/numpunct/members/wchar_t/cache_2.cc

   1 // 2003-07-06  Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2003-2013 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 <locale>
  21 #include <sstream>
  22 #include <ostream>
  23 #include <testsuite_hooks.h>
  24
  25 class numpunct_checked : public std::numpunct<wchar_t>
  26 {
  27   typedef std::numpunct<wchar_t> base;
  28
  29 public:
  30   explicit
  31   numpunct_checked(std::size_t refs = 0): base(refs) { }
  32
  33   string_type
  34   base_truename() const
  35   { return base::do_truename(); }
  36
  37 protected:
  38   virtual string_type
  39   do_truename() const
  40   { return base::do_truename() + L"st"; }
  41 };
  42
  43 // Changing caches deletes old cache, adds new one.
  44 void test01()
  45 {
  46   using namespace std;
  47
  48   bool test __attribute__((unused)) = true;
  49   const wstring         empty;
  50   const wstring         basestr(L"true");
  51   const wstring         derivedstr(L"truest");
  52
  53   const locale  loc(locale::classic(), new numpunct_checked);
  54   wstringbuf    sbuf;
  55   wostream      os(&sbuf);
  56   os.setf(ios_base::boolalpha);
  57
  58   // Pre-cache sanity check.
  59   const numpunct<wchar_t>& np = use_facet<numpunct<wchar_t> >(loc);
  60   VERIFY( np.truename() == derivedstr );
  61
  62   // Cache.
  63   os.imbue(loc);
  64   os << true;
  65   VERIFY( sbuf.str() == derivedstr );
  66
  67   // Re-cache.
  68   sbuf.str(empty);
  69   os.imbue(locale::classic());
  70   os << true;
  71   VERIFY( sbuf.str() == basestr );
  72
  73   // Cache new locale again.
  74   sbuf.str(empty);
  75   os.imbue(loc);
  76   os << true;
  77   VERIFY( sbuf.str() == derivedstr );
  78
  79   // Post-cache sanity check, make sure that base class is still fine.
  80   VERIFY( np.truename() == derivedstr );
  81   const numpunct_checked& npd = static_cast<const numpunct_checked&>(np);
  82   VERIFY( npd.base_truename() == basestr );
  83 }
  84
  85 int main()
  86 {
  87   test01();
  88   return 0;
  89 }