48 lines
1.2 KiB
Plaintext
48 lines
1.2 KiB
Plaintext
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// Boost.Range library
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//
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// Copyright Thorsten Ottosen 2003-2004. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_DIFFERENCE_TYPE_HPP
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#define BOOST_RANGE_DIFFERENCE_TYPE_HPP
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/mpl/and.hpp>
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#include <boost/range/config.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/range/has_range_iterator.hpp>
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#include <boost/iterator/iterator_traits.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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namespace boost
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{
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namespace range_detail
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{
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template< class T, bool B = has_type<range_iterator<T> >::value >
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struct range_difference
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{ };
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template< class T >
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struct range_difference<T, true>
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: iterator_difference<
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BOOST_DEDUCED_TYPENAME range_iterator<T>::type
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>
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{ };
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}
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template< class T >
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struct range_difference
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: range_detail::range_difference<BOOST_DEDUCED_TYPENAME remove_reference<T>::type>
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{ };
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}
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#endif
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