libstdc++-v3/testsuite/24_iterators/reverse_iterator.cc

   1 // 2001-06-21  Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 24.4.1.2 Reverse iterators
  22
  23 #include <iterator>
  24
  25 void test01()
  26 {
  27   using namespace std;
  28
  29   // Check for required base class.
  30   long l;
  31   typedef reverse_iterator<long*> test_iterator;
  32   typedef iterator<iterator_traits<long*>::iterator_category,
  33                    iterator_traits<long*>::value_type,
  34                    iterator_traits<long*>::difference_type,
  35                    iterator_traits<long*>::pointer,
  36                    iterator_traits<long*>::reference>
  37     base_iterator;
  38   test_iterator  r_it(&l);
  39   base_iterator* base = &r_it;
  40
  41   // Check for required typedefs
  42   typedef test_iterator::value_type value_type;
  43   typedef test_iterator::difference_type difference_type;
  44   typedef test_iterator::pointer pointer;
  45   typedef test_iterator::reference reference;
  46   typedef test_iterator::iterator_category iteratory_category;
  47 }
  48
  49
  50 // Make sure iterator can be instantiated.
  51 template class std::reverse_iterator<int*>;
  52
  53 void test02()
  54 {
  55   typedef std::reverse_iterator<int*> iterator_type;
  56   iterator_type it01;
  57   iterator_type it02;
  58
  59   // Sanity check non-member operators and functions can be instantiated.
  60   it01 == it02;
  61   it01 != it02;
  62   it01 < it02;
  63   it01 <= it02;
  64   it01 > it02;
  65   it01 >= it02;
  66   it01 - it02;
  67   5 + it02;
  68 }
  69
  70 // Check data member 'current' accessible.
  71 class test_dm : public std::reverse_iterator<int*>
  72 {
  73   int* p;
  74 public:
  75   test_dm(): p(current) { }
  76 };
  77
  78 int main()
  79 {
  80   test01();
  81   test02();
  82   return 0;
  83 }