libstdc++-v3/testsuite/27_io/basic_stringstream/str/wchar_t/1.cc

   1 // Copyright (C) 2004-2020 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 // 27.7.6 member functions (stringstream_members)
  19
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 void test01()
  24 {
  25   std::wstringstream is01;
  26   const std::wstring str00;
  27   const std::wstring str01 = L"123";
  28   std::wstring str02;
  29   const int i01 = 123;
  30   int a = 0, b = 0;
  31
  32   std::ios_base::iostate state1, state2, stateeof;
  33   stateeof = std::ios_base::eofbit;
  34
  35   // string str() const
  36   str02 = is01.str();
  37   VERIFY( str00 == str02 );
  38
  39   // void str(const basic_string&)
  40   is01.str(str01);
  41   str02 = is01.str();
  42   VERIFY( str01 == str02 );
  43   state1 = is01.rdstate();
  44   is01 >> a;
  45   state2 = is01.rdstate();
  46   VERIFY( a == i01 );
  47   // 22.2.2.1.2 num_get virtual functions
  48   // p 13
  49   // in any case, if stage 2 processing was terminated by the test for
  50   // in == end then err != ios_base::eofbit is performed.
  51   VERIFY( state1 != state2 );
  52   VERIFY( state2 == stateeof );
  53
  54   is01.str(str01);
  55   is01 >> b;
  56   VERIFY( b != a );
  57   // as is01.good() is false, istream::sentry blocks extraction.
  58
  59   is01.clear();
  60   state1 = is01.rdstate();
  61   is01 >> b;
  62   state2 = is01.rdstate();
  63   VERIFY( b == a );
  64   VERIFY( state1 != state2 );
  65   VERIFY( state2 == stateeof );
  66 }
  67
  68 int main()
  69 {
  70   test01();
  71   return 0;
  72 }