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文件: /usr/include/boost/range/difference_type.hpp
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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_DIFFERENCE_TYPE_HPP #define BOOST_RANGE_DIFFERENCE_TYPE_HPP #if defined(_MSC_VER) # pragma once #endif #include <boost/mpl/and.hpp> #include <boost/range/config.hpp> #include <boost/range/iterator.hpp> #include <boost/range/has_range_iterator.hpp> #include <boost/iterator/iterator_traits.hpp> #include <boost/type_traits/remove_reference.hpp> namespace boost { namespace range_detail { template< class T, bool B = has_type<range_iterator<T> >::value > struct range_difference { }; template< class T > struct range_difference<T, true> : iterator_difference< BOOST_DEDUCED_TYPENAME range_iterator<T>::type > { }; } template< class T > struct range_difference : range_detail::range_difference<BOOST_DEDUCED_TYPENAME remove_reference<T>::type> { }; } #endif
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