libstdc++-v3/testsuite/27_io/basic_istringstream/view/char/1.cc

   1 // Copyright (C) 2020-2022 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 // 29.8.3.4  basic_istringstream member functions  [istringstream.members]
  19
  20 // { dg-options "-std=gnu++2a" }
  21 // { dg-do run { target c++2a } }
  22 // { dg-require-effective-target cxx11_abi }
  23
  24 #include <sstream>
  25 #include <string_view>
  26 #include <testsuite_hooks.h>
  27
  28 int
  29 main()
  30 {
  31   std::string s("This is a test");
  32   std::istringstream stm(s);
  33   VERIFY( stm.view() == s );
  34   VERIFY( stm.view() == const_cast<const std::istringstream&>(stm).view() );
  35
  36   s = "This is another test with a longer string";
  37   stm.str(s);
  38   VERIFY( stm.view() == s );
  39
  40   s = "This is a shorter string";
  41   stm.str(s);
  42   VERIFY( stm.view() == s );
  43
  44   std::string s2;
  45   stm >> s2;
  46   VERIFY( stm.view() == s );
  47 }