gomp-20050608-branch/libstdc++-v3/testsuite/27_io/basic_istream/putback/wchar_t/1.cc

   1 // Copyright (C) 2004 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // 27.6.1.3 unformatted input functions
  20
  21 #include <istream>
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   bool test __attribute__((unused)) = true;
  29   const std::wstring str_01;
  30   const std::wstring str_02(L"soul eyes: john coltrane quartet");
  31   std::wstring strtmp;
  32
  33   std::wstringbuf isbuf_03(str_02, std::ios_base::in);
  34   std::wstringbuf isbuf_04(str_02, std::ios_base::in);
  35   std::wstringbuf isbuf_05(str_02, std::ios_base::in);
  36
  37   std::wistream is_00(&isbuf_05);
  38   std::wistream is_03(&isbuf_03);
  39   std::wistream is_04(&isbuf_04);
  40   std::ios_base::iostate state1, state2;
  41
  42   // istream& putback(char_type c)
  43   is_04.ignore(30);
  44   is_04.clear();
  45   state1 = is_04.rdstate();
  46   is_04.putback(L't');
  47   VERIFY( is_04.gcount() == 0 );  // DR 60
  48   state2 = is_04.rdstate();
  49   VERIFY( state1 == state2 );
  50   VERIFY( is_04.peek() == L't' );
  51
  52   // istream& unget()
  53   is_04.clear();
  54   state1 = is_04.rdstate();
  55   is_04.unget();
  56   VERIFY( is_04.gcount() == 0 );  // DR 60
  57   state2 = is_04.rdstate();
  58   VERIFY( state1 == state2 );
  59   VERIFY( is_04.peek() == L'r' );
  60
  61   // int sync()
  62   is_00.ignore(10);
  63   int count1 = is_00.gcount();
  64   is_00.sync();
  65   int count2 = is_00.gcount();
  66   VERIFY (count1 == count2 );     // DR 60
  67 }
  68
  69 int
  70 main()
  71 {
  72   test01();
  73   return 0;
  74 }