libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc

   1 // Copyright (C) 2020-2024 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 // { dg-do run }
  19
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 void
  24 test01()
  25 {
  26   const std::string str = "1234";
  27   std::istringstream in(str);
  28   char buf[6];
  29   in.width(5);
  30   in >> buf; // stops after reading 4 chars, doesn't reach EOF
  31   VERIFY( !in.eof() );
  32   VERIFY( buf == str );
  33 }
  34
  35 struct WT : std::char_traits<wchar_t> { };
  36
  37 void
  38 test02()
  39 {
  40   const std::wstring str = L"1234";
  41   std::basic_istringstream<wchar_t, WT> in(str.c_str());
  42   wchar_t buf[6];
  43   in.width(5);
  44   in >> buf; // stops after reading 4 chars, doesn't reach EOF
  45   VERIFY( !in.eof() );
  46   VERIFY( buf == str );
  47 }
  48
  49 int
  50 main()
  51 {
  52   test01();
  53   test02();
  54 }