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41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
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// Copyright David Abrahams 2004. Use, modification and distribution is
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef POINTEE_DWA200415_HPP
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# define POINTEE_DWA200415_HPP
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// dereferenceable_traits provides access to the value_type and
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// reference of a Dereferenceable type.
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# include <boost/detail/is_incrementable.hpp>
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# include <boost/iterator/iterator_traits.hpp>
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# include <boost/type_traits/remove_cv.hpp>
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# include <boost/mpl/apply_if.hpp>
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namespace boost {
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namespace detail
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{
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template <class P>
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struct smart_ptr_value
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{
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typedef typename remove_cv<typename P::element_type>::type type;
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};
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}
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template <class P>
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struct pointee
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{
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typedef typename remove_cv<P>::type stripped;
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typedef typename mpl::apply_if<
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detail::is_incrementable<stripped>
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, iterator_value<stripped>
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, detail::smart_ptr_value<stripped>
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>::type type;
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};
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} // namespace boost
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#endif // POINTEE_DWA200415_HPP
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