libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/2.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 // 27.6.1.2.3 character extractors
  19
  20 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 void test02()
  25 {
  26   std::wstring str_01;
  27   const std::wstring str_02(L"or coltrane playing tunji with jimmy garrison");
  28   const std::wstring str_03(L"coltrane");
  29
  30   std::wstringbuf isbuf_01(std::ios_base::in);
  31   std::wstringbuf isbuf_02(str_02, std::ios_base::in);
  32   std::wistream is_01(0);
  33   std::wistream is_02(&isbuf_02);
  34   std::ios_base::iostate state1, state2, statefail;
  35   statefail = std::ios_base::failbit;
  36
  37   // template<_CharT, _Traits>
  38   //  basic_istream& operator>>(istream&, _CharT&)
  39   wchar_t c1 = L'c', c2 = L'c';
  40   state1 = is_01.rdstate();
  41   is_01 >> c1;
  42   state2 = is_01.rdstate();
  43   VERIFY( state1 != state2 );
  44   VERIFY( c1 == c2 );
  45   VERIFY( static_cast<bool>(state2 & statefail) );
  46
  47   state1 = is_02.rdstate();
  48   is_02 >> c1;
  49   state2 = is_02.rdstate();
  50   VERIFY( state1 == state2 );
  51   VERIFY( c1 == L'o' );
  52   is_02 >> c1;
  53   is_02 >> c1;
  54   VERIFY( c1 == L'c' );
  55   VERIFY( !static_cast<bool>(state2 & statefail) );
  56 }
  57
  58 int main()
  59 {
  60   test02();
  61   return 0;
  62 }