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

   1 // 2000-01-10 bkoz
   2
   3 // Copyright (C) 2000-2020 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 // 27.7.2.2 member functions (istringstream_members)
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 void test01()
  26 {
  27   std::istringstream is01;
  28   const std::string str00;
  29   const std::string str01 = "123";
  30   std::string str02;
  31   const int i01 = 123;
  32   int a = 0, b = 0;
  33
  34   std::ios_base::iostate state1, state2, stateeof;
  35   stateeof = std::ios_base::eofbit;
  36
  37   // string str() const
  38   str02 = is01.str();
  39   VERIFY( str00 == str02 );
  40
  41   // void str(const basic_string&)
  42   is01.str(str01);
  43   str02 = is01.str();
  44   VERIFY( str01 == str02 );
  45   state1 = is01.rdstate();
  46   is01 >> a;
  47   state2 = is01.rdstate();
  48   VERIFY( a == i01 );
  49   // 22.2.2.1.2 num_get virtual functions
  50   // p 13
  51   // in any case, if stage 2 processing was terminated by the test for
  52   // in == end then err != ios_base::eofbit is performed.
  53   VERIFY( state1 != state2 );
  54   VERIFY( state2 == stateeof );
  55
  56   is01.str(str01);
  57   is01 >> b;
  58   VERIFY( b != a );
  59   // as is01.good() is false, istream::sentry blocks extraction.
  60
  61   is01.clear();
  62   state1 = is01.rdstate();
  63   is01 >> b;
  64   state2 = is01.rdstate();
  65   VERIFY( b == a );
  66   VERIFY( state1 != state2 );
  67   VERIFY( state2 == stateeof );
  68 }
  69
  70 int main()
  71 {
  72   test01();
  73   return 0;
  74 }