libstdc++-v3/testsuite/25_algorithms/advance/istreambuf_iterators/char/1.cc

   1 // Copyright (C) 2017-2021 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 #include <iterator>
  19 #include <sstream>
  20 #include <algorithm>
  21 #include <testsuite_hooks.h>
  22
  23 void test01()
  24 {
  25   using namespace std;
  26
  27   typedef istreambuf_iterator<char> in_iterator_type;
  28
  29   const char data1[] = "Drei Phantasien nach Friedrich Holderlin";
  30   const string str1(data1);
  31   istringstream iss1(str1);
  32   in_iterator_type beg1(iss1);
  33   in_iterator_type end1;
  34
  35   VERIFY( *beg1 == 'D' );
  36
  37   advance(beg1, 1);
  38
  39   VERIFY( beg1 != end1 );
  40   VERIFY( *beg1 == 'r' );
  41
  42   advance(beg1, 0);
  43   VERIFY( *beg1 == 'r' );
  44
  45   advance(beg1, 38);
  46   VERIFY( *beg1 == 'n' );
  47
  48   advance(beg1, 1);
  49   VERIFY( beg1 == end1 );
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }