libstdc++-v3/testsuite/24_iterators/istreambuf_iterator/2627.cc

   1 // 1999-06-28 bkoz
   2
   3 // Copyright (C) 1999-2020 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 // 24.5.3 template class istreambuf_iterator
  21
  22 #include <sstream>
  23 #include <iterator>
  24 #include <testsuite_hooks.h>
  25
  26 // libstdc++/2627
  27 void test03()
  28 {
  29   const std::string s("free the vieques");
  30
  31   // 1
  32   std::string res_postfix;
  33   std::istringstream iss01(s);
  34   std::istreambuf_iterator<char> isbufit01(iss01);
  35   for (std::size_t j = 0; j < s.size(); ++j, isbufit01++)
  36     res_postfix += *isbufit01;
  37
  38   // 2
  39   std::string res_prefix;
  40   std::istringstream iss02(s);
  41   std::istreambuf_iterator<char> isbufit02(iss02);
  42   for (std::size_t j = 0; j < s.size(); ++j, ++isbufit02)
  43     res_prefix += *isbufit02;
  44
  45   // 3 mixed
  46   std::string res_mixed;
  47   std::istringstream iss03(s);
  48   std::istreambuf_iterator<char> isbufit03(iss03);
  49   for (std::size_t j = 0; j < (s.size() / 2); ++j)
  50     {
  51       res_mixed += *isbufit03;
  52       ++isbufit03;
  53       res_mixed += *isbufit03;
  54       isbufit03++;
  55     }
  56
  57   VERIFY ( res_postfix == res_prefix );
  58   VERIFY ( res_mixed == res_prefix );
  59 }
  60
  61 int main()
  62 {
  63   test03();
  64   return 0;
  65 }