libstdc++-v3/testsuite/24_iterators/operations/prev.cc

   1 // { dg-options "-std=gnu++11" }
   2
   3 // Copyright (C) 2008-2016 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 // 24.3.4 Iterator operations [iterator.operations]
  21
  22 #include <vector>
  23 #include <list>
  24 #include <iterator>
  25 #include <testsuite_hooks.h>
  26
  27 void test01()
  28 {
  29   bool test __attribute__((unused)) = true;
  30   std::vector<int> c(3);
  31   std::vector<int>::iterator i = c.end(), j;
  32
  33   j = std::prev(i, 3);
  34   VERIFY( i == c.end() );
  35   VERIFY( j == c.begin() );
  36 }
  37
  38 void test02()
  39 {
  40   bool test __attribute__((unused)) = true;
  41   std::list<int> c(3);
  42   std::list<int>::iterator i = c.end(), j;
  43
  44   j = std::prev(i, 3);
  45   VERIFY( i == c.end() );
  46   VERIFY( j == c.begin() );
  47 }
  48
  49 int main()
  50 {
  51   test01();
  52   test02();
  53   return 0;
  54 }