iterator/test/shared_iterator_test.cpp

// Copyright 2003 The Trustees of Indiana University.

// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

//  Shared container iterator adaptor
//  Author: Ronald Garcia
//  See http://boost.org/libs/utility/shared_container_iterator.html
//  for documentation.

//
// shared_iterator_test.cpp - Regression tests for shared_container_iterator.
//


#include <boost/iterator/shared_container_iterator.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/core/lightweight_test.hpp>
#include <vector>
#include <memory>

struct resource
{
  static int count;
  resource() { ++count; }
  resource(resource const&) { ++count; }
  ~resource() { --count; }
};
int resource::count = 0;

typedef std::vector< resource > resources_t;

typedef boost::shared_container_iterator< resources_t > iterator;

template< typename SharedPtr >
void set_range(iterator& i, iterator& end)
{
  SharedPtr objs(new resources_t());

  for (int j = 0; j != 6; ++j)
    objs->push_back(resource());

  i = iterator(objs->begin(), objs);
  end = iterator(objs->end(), objs);
  BOOST_TEST_EQ(resource::count, 6);
}


int main() {

  BOOST_TEST_EQ(resource::count, 0);

  {
    iterator i;
    {
      iterator end;
      set_range< boost::shared_ptr< resources_t > >(i, end);
      BOOST_TEST_EQ(resource::count, 6);
    }
    BOOST_TEST_EQ(resource::count, 6);
  }
  BOOST_TEST_EQ(resource::count, 0);

  {
    iterator i;
    {
      iterator end;
      set_range< std::shared_ptr< resources_t > >(i, end);
      BOOST_TEST_EQ(resource::count, 6);
    }
    BOOST_TEST_EQ(resource::count, 6);
  }
  BOOST_TEST_EQ(resource::count, 0);

  return boost::report_errors();
}