// Boost.Range library | |
// | |
// Copyright Thorsten Ottosen 2003-2004. 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) | |
// | |
// For more information, see http://www.boost.org/libs/range/ | |
// | |
#ifndef BOOST_RANGE_DETAIL_DIFFERENCE_TYPE_HPP | |
#define BOOST_RANGE_DETAIL_DIFFERENCE_TYPE_HPP | |
#include <boost/range/detail/common.hpp> | |
#include <boost/iterator/iterator_traits.hpp> | |
////////////////////////////////////////////////////////////////////////////// | |
// missing partial specialization workaround. | |
////////////////////////////////////////////////////////////////////////////// | |
namespace boost | |
{ | |
namespace range_detail | |
{ | |
template< typename T > | |
struct range_difference_type_; | |
template<> | |
struct range_difference_type_<std_container_> | |
{ | |
template< typename C > | |
struct pts | |
{ | |
typedef BOOST_DEDUCED_TYPENAME C::difference_type type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<std_pair_> | |
{ | |
template< typename P > | |
struct pts | |
{ | |
typedef BOOST_RANGE_DEDUCED_TYPENAME boost::iterator_difference< BOOST_DEDUCED_TYPENAME P::first_type>::type type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<array_> | |
{ | |
template< typename A > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<char_array_> | |
{ | |
template< typename A > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<char_ptr_> | |
{ | |
template< typename S > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<const_char_ptr_> | |
{ | |
template< typename S > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<wchar_t_ptr_> | |
{ | |
template< typename S > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
template<> | |
struct range_difference_type_<const_wchar_t_ptr_> | |
{ | |
template< typename S > | |
struct pts | |
{ | |
typedef std::ptrdiff_t type; | |
}; | |
}; | |
} | |
template< typename C > | |
class range_difference | |
{ | |
typedef BOOST_RANGE_DEDUCED_TYPENAME range_detail::range<C>::type c_type; | |
public: | |
typedef BOOST_RANGE_DEDUCED_TYPENAME range_detail::range_difference_type_<c_type>::BOOST_NESTED_TEMPLATE pts<C>::type type; | |
}; | |
} | |
#endif | |