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- // 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
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