libstdc++-v3/testsuite/25_algorithms/copy_n/50119.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2018 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 #include <algorithm>
  21 #include <vector>
  22 #include <sstream>
  23 #include <iterator>
  24 #include <testsuite_hooks.h>
  25
  26 // libstdc++/50119
  27 void test01()
  28 {
  29   using namespace std;
  30
  31   vector<int> v;
  32   istringstream s("1 2 3 4 5");
  33
  34   copy_n(istream_iterator<int>(s), 2, back_inserter(v));
  35   VERIFY( v.size() == 2 );
  36   VERIFY( v[0] == 1 );
  37   VERIFY( v[1] == 2 );
  38
  39   copy_n(istream_iterator<int>(s), 2, back_inserter(v));
  40   VERIFY( v.size() == 4 );
  41   VERIFY( v[0] == 1 );
  42   VERIFY( v[1] == 2 );
  43   VERIFY( v[2] == 3 );
  44   VERIFY( v[3] == 4 );
  45 }
  46
  47 int main()
  48 {
  49   test01();
  50   return 0;
  51 }