container/test/input_from_forward_iterator.hpp

81 lines
2.5 KiB
C++

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2012-2013. Distributed under 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)
//
// See http://www.boost.org/libs/container for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_CONTAINER_TEST_FORWARD_TO_INPUT_ITERATOR_HPP
#define BOOST_CONTAINER_TEST_FORWARD_TO_INPUT_ITERATOR_HPP
#include <boost/container/detail/iterator.hpp>
namespace boost{
namespace container {
namespace test{
template<class FwdIterator>
class input_iterator_wrapper
: public boost::container::iterator< std::input_iterator_tag
, typename boost::container::iterator_traits<FwdIterator>::value_type
, typename boost::container::iterator_traits<FwdIterator>::difference_type
, typename boost::container::iterator_traits<FwdIterator>::pointer
, typename boost::container::iterator_traits<FwdIterator>::reference
>
{
FwdIterator m_it;
public:
input_iterator_wrapper()
: m_it(0)
{}
explicit input_iterator_wrapper(FwdIterator it)
: m_it(it)
{}
//Default copy constructor...
//input_iterator_wrapper(const input_iterator_wrapper&);
//Default assignment...
//input_iterator_wrapper &operator=(const input_iterator_wrapper&);
//Default destructor...
//~input_iterator_wrapper();
typename boost::container::iterator_traits<FwdIterator>::reference operator*() const
{ return *m_it; }
typename boost::container::iterator_traits<FwdIterator>::pointer operator->() const
{ return m_it.operator->(); }
input_iterator_wrapper& operator++()
{ ++m_it; return *this; }
input_iterator_wrapper operator++(int )
{
input_iterator_wrapper tmp(m_it);
++m_it;
return tmp;
}
friend bool operator==(const input_iterator_wrapper &left, const input_iterator_wrapper &right)
{ return left.m_it == right.m_it; }
friend bool operator!=(const input_iterator_wrapper &left, const input_iterator_wrapper &right)
{ return left.m_it != right.m_it; }
};
template<class FwdIterator>
input_iterator_wrapper<FwdIterator> make_input_from_forward_iterator(const FwdIterator &it)
{ return input_iterator_wrapper<FwdIterator>(it); }
} //namespace test{
} //namespace container {
} //namespace boost{
#endif //BOOST_CONTAINER_TEST_FORWARD_TO_INPUT_ITERATOR_HPP