/*=============================================================================
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Copyright (c) 2006-2007 Tobias Schwinger
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Use modification and distribution are subject to the Boost Software
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License, Version 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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#if !defined(BOOST_FUSION_FUNCTIONAL_INVOCATION_DETAIL_THAT_PTR_HPP_INCLUDED)
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#define BOOST_FUSION_FUNCTIONAL_INVOCATION_DETAIL_THAT_PTR_HPP_INCLUDED
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#include <boost/fusion/support/config.hpp>
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#include <boost/get_pointer.hpp>
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#include <boost/utility/addressof.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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namespace boost { namespace fusion { namespace detail
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{
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template <typename Wanted>
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struct that_ptr
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{
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private:
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typedef typename remove_reference<Wanted>::type pointee;
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template <typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static inline pointee * do_get_pointer(T &, pointee * x)
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{
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return x;
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}
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template <typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static inline pointee * do_get_pointer(T & x, void const *)
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{
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return get_pointer(x);
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}
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public:
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static inline pointee * get(pointee * x)
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{
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return x;
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}
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static inline pointee * get(pointee & x)
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{
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return boost::addressof(x);
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}
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template <typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static inline pointee * get(T & x)
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{
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return do_get_pointer(x, boost::addressof(x));
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}
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};
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template <typename PtrOrSmartPtr> struct non_const_pointee;
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#if defined(BOOST_MSVC) || (defined(BOOST_BORLANDC) && !defined(BOOST_DISABLE_WIN32))
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# define BOOST_FUSION_TRAIT_DECL __cdecl
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#else
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# define BOOST_FUSION_TRAIT_DECL /**/
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#endif
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namespace adl_barrier
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{
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using boost::get_pointer;
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void const * BOOST_FUSION_TRAIT_DECL get_pointer(...); // fallback
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template< typename T> char const_tester(T *);
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template< typename T> long const_tester(T const *);
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template <typename Ptr>
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struct non_const_pointee_impl
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{
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static Ptr & what;
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static bool const value =
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sizeof(const_tester(get_pointer(what))) == 1;
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};
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}
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template <typename PtrOrSmartPtr> struct non_const_pointee
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: adl_barrier::non_const_pointee_impl<
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typename remove_cv<
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typename remove_reference<PtrOrSmartPtr>::type >::type >
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{
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typedef non_const_pointee type;
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typedef bool value_type;
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};
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}}}
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#endif
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