libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/wchar_t/1.cc

   1 // 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004-2020 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 // 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 class my_stringbuf : public std::wstringbuf
  26 {
  27 public:
  28   my_stringbuf(const std::wstring& str, std::ios_base::openmode mode)
  29   : std::wstringbuf(str, mode) { }
  30
  31   int_type
  32   pub_pbackfail(int_type c)
  33   { return this->pbackfail(c); }
  34 };
  35
  36 void test01()
  37 {
  38   using namespace std;
  39
  40   typedef my_stringbuf::int_type    int_type;
  41   typedef my_stringbuf::traits_type traits_type;
  42
  43   my_stringbuf sbuf(L"any", ios_base::in | ios_base::out);
  44
  45   int_type c = sbuf.sgetc();
  46   VERIFY( c == L'a' );
  47
  48   c = sbuf.pub_pbackfail(L'z');
  49   VERIFY( c == traits_type::eof() );
  50   c = sbuf.sbumpc();
  51   VERIFY( c == L'a' );
  52
  53   c = sbuf.pub_pbackfail(L'a');
  54   VERIFY( c == L'a' );
  55   c = sbuf.sbumpc();
  56   VERIFY( c == L'a' );
  57
  58   c = sbuf.pub_pbackfail(L'x');
  59   VERIFY( c == L'x' );
  60   c = sbuf.sbumpc();
  61   VERIFY( c == L'x' );
  62
  63   const int_type eof = traits_type::eof();
  64   c = sbuf.pub_pbackfail(eof);
  65   VERIFY( c == traits_type::not_eof(eof) );
  66   c = sbuf.sgetc();
  67   VERIFY( c == L'x' );
  68 }
  69
  70 int main()
  71 {
  72   test01();
  73   return 0;
  74 }