ceph/src/boost/libs/core/test/swap/array_of_class.cpp

   1 // Copyright (c) 2008 Joseph Gauterin, Niels Dekker
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 // Tests swapping an array of arrays of swap_test_class objects by means of boost::swap.
   8
   9 #include <boost/utility/swap.hpp>
  10 #include <boost/core/lightweight_test.hpp>
  11 #define BOOST_CHECK BOOST_TEST
  12 #define BOOST_CHECK_EQUAL BOOST_TEST_EQ
  13
  14 //Put test class in the global namespace
  15 #include "./swap_test_class.hpp"
  16
  17 #include <algorithm> //for std::copy and std::equal
  18 #include <cstddef> //for std::size_t
  19
  20 //Provide swap function in both the namespace of swap_test_class
  21 //(which is the global namespace), and the std namespace.
  22 //It's common to provide a swap function for a class in both
  23 //namespaces. Scott Meyers recommends doing so: Effective C++,
  24 //Third Edition, item 25, "Consider support for a non-throwing swap".
  25 void swap(swap_test_class& left, swap_test_class& right)
  26 {
  27   left.swap(right);
  28 }
  29
  30 namespace std
  31 {
  32   template <>
  33   void swap(swap_test_class& left, swap_test_class& right)
  34   {
  35     left.swap(right);
  36   }
  37 }
  38
  39
  40 int main()
  41 {
  42   const std::size_t array_size = 2;
  43   const swap_test_class initial_array1[array_size] = { swap_test_class(1), swap_test_class(2) };
  44   const swap_test_class initial_array2[array_size] = { swap_test_class(3), swap_test_class(4) };
  45
  46   swap_test_class array1[array_size];
  47   swap_test_class array2[array_size];
  48
  49   std::copy(initial_array1, initial_array1 + array_size, array1);
  50   std::copy(initial_array2, initial_array2 + array_size, array2);
  51
  52   swap_test_class::reset();
  53   boost::swap(array1, array2);
  54
  55   BOOST_CHECK(std::equal(array1, array1 + array_size, initial_array2));
  56   BOOST_CHECK(std::equal(array2, array2 + array_size, initial_array1));
  57
  58   BOOST_CHECK_EQUAL(swap_test_class::swap_count(), array_size);
  59   BOOST_CHECK_EQUAL(swap_test_class::copy_count(), 0);
  60
  61   return boost::report_errors();
  62 }