Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: //
Chris@102: // (C) Copyright Ion Gaztanaga  2014-2014
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0.
Chris@102: //    (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: //          http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // See http://www.boost.org/libs/intrusive for documentation.
Chris@102: //
Chris@102: /////////////////////////////////////////////////////////////////////////////
Chris@102: 
Chris@102: #ifndef BOOST_INTRUSIVE_DETAIL_NODE_TO_VALUE_HPP
Chris@102: #define BOOST_INTRUSIVE_DETAIL_NODE_TO_VALUE_HPP
Chris@102: 
Chris@102: #ifndef BOOST_CONFIG_HPP
Chris@102: #  include <boost/config.hpp>
Chris@102: #endif
Chris@102: 
Chris@102: #if defined(BOOST_HAS_PRAGMA_ONCE)
Chris@102: #  pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/intrusive/pointer_traits.hpp>
Chris@102: #include <boost/intrusive/detail/mpl.hpp>
Chris@102: #include <boost/intrusive/detail/is_stateful_value_traits.hpp>
Chris@102: 
Chris@102: namespace boost {
Chris@102: namespace intrusive {
Chris@102: namespace detail {
Chris@102: 
Chris@102: template<class VoidPointer>
Chris@102: struct dummy_constptr
Chris@102: {
Chris@102:    typedef typename boost::intrusive::pointer_traits<VoidPointer>::
Chris@102:       template rebind_pointer<const void>::type ConstVoidPtr;
Chris@102: 
Chris@102:    explicit dummy_constptr(ConstVoidPtr)
Chris@102:    {}
Chris@102: 
Chris@102:    dummy_constptr()
Chris@102:    {}
Chris@102: 
Chris@102:    ConstVoidPtr get_ptr() const
Chris@102:    {  return ConstVoidPtr();  }
Chris@102: };
Chris@102: 
Chris@102: template<class VoidPointer>
Chris@102: struct constptr
Chris@102: {
Chris@102:    typedef typename boost::intrusive::pointer_traits<VoidPointer>::
Chris@102:       template rebind_pointer<const void>::type ConstVoidPtr;
Chris@102: 
Chris@102:    constptr()
Chris@102:    {}
Chris@102: 
Chris@102:    explicit constptr(const ConstVoidPtr &ptr)
Chris@102:       :  const_void_ptr_(ptr)
Chris@102:    {}
Chris@102: 
Chris@102:    const void *get_ptr() const
Chris@102:    {  return boost::intrusive::detail::to_raw_pointer(const_void_ptr_);  }
Chris@102: 
Chris@102:    ConstVoidPtr const_void_ptr_;
Chris@102: };
Chris@102: 
Chris@102: template <class VoidPointer, bool store_ptr>
Chris@102: struct select_constptr
Chris@102: {
Chris@102:    typedef typename if_c
Chris@102:       < store_ptr
Chris@102:       , constptr<VoidPointer>
Chris@102:       , dummy_constptr<VoidPointer>
Chris@102:       >::type type;
Chris@102: };
Chris@102: 
Chris@102: 
Chris@102: template<class ValueTraits, bool IsConst>
Chris@102: struct node_to_value
Chris@102:    :  public select_constptr
Chris@102:       < typename pointer_traits
Chris@102:             <typename ValueTraits::pointer>::template rebind_pointer<void>::type
Chris@102:       , is_stateful_value_traits<ValueTraits>::value
Chris@102:       >::type
Chris@102: {
Chris@102:    static const bool stateful_value_traits = is_stateful_value_traits<ValueTraits>::value;
Chris@102:    typedef typename select_constptr
Chris@102:       < typename pointer_traits
Chris@102:             <typename ValueTraits::pointer>::
Chris@102:                template rebind_pointer<void>::type
Chris@102:       , stateful_value_traits >::type                 Base;
Chris@102: 
Chris@102:    typedef ValueTraits                                 value_traits;
Chris@102:    typedef typename value_traits::value_type           value_type;
Chris@102:    typedef typename value_traits::node_traits::node    node;
Chris@102:    typedef typename add_const_if_c
Chris@102:          <value_type, IsConst>::type                   vtype;
Chris@102:    typedef typename add_const_if_c
Chris@102:          <node, IsConst>::type                         ntype;
Chris@102:    typedef typename pointer_traits
Chris@102:       <typename ValueTraits::pointer>::
Chris@102:          template rebind_pointer<ntype>::type          npointer;
Chris@102:    typedef typename pointer_traits<npointer>::
Chris@102:       template rebind_pointer<const ValueTraits>::type const_value_traits_ptr;
Chris@102: 
Chris@102:    node_to_value(const const_value_traits_ptr &ptr)
Chris@102:       :  Base(ptr)
Chris@102:    {}
Chris@102: 
Chris@102:    typedef vtype &                                 result_type;
Chris@102:    typedef ntype &                                 first_argument_type;
Chris@102: 
Chris@102:    const_value_traits_ptr get_value_traits() const
Chris@102:    {  return pointer_traits<const_value_traits_ptr>::static_cast_from(Base::get_ptr());  }
Chris@102: 
Chris@102:    result_type to_value(first_argument_type arg, false_) const
Chris@102:    {  return *(value_traits::to_value_ptr(pointer_traits<npointer>::pointer_to(arg)));  }
Chris@102: 
Chris@102:    result_type to_value(first_argument_type arg, true_) const
Chris@102:    {  return *(this->get_value_traits()->to_value_ptr(pointer_traits<npointer>::pointer_to(arg))); }
Chris@102: 
Chris@102:    result_type operator()(first_argument_type arg) const
Chris@102:    {  return this->to_value(arg, bool_<stateful_value_traits>()); }
Chris@102: };
Chris@102: 
Chris@102: }  //namespace detail{
Chris@102: }  //namespace intrusive{
Chris@102: }  //namespace boost{
Chris@102: 
Chris@102: #endif //BOOST_INTRUSIVE_DETAIL_NODE_TO_VALUE_HPP