FM / type_erasure

/usr/include/boost/type_erasure

Name	Size	Mode	Actions
detail/	-	0755	rm
any.hpp	104285	0644	edit dl rm
any_cast.hpp	5492	0644	edit dl rm
binding.hpp	9045	0644	edit dl rm
binding_of.hpp	763	0644	edit dl rm
builtin.hpp	4318	0644	edit dl rm
call.hpp	21940	0644	edit dl rm
callable.hpp	13126	0644	edit dl rm
check_match.hpp	8181	0644	edit dl rm
concept_interface.hpp	1876	0644	edit dl rm
concept_of.hpp	1456	0644	edit dl rm
config.hpp	862	0644	edit dl rm
constructible.hpp	5344	0644	edit dl rm
deduced.hpp	1575	0644	edit dl rm
derived.hpp	927	0644	edit dl rm
dynamic_any_cast.hpp	8239	0644	edit dl rm
dynamic_binding.hpp	1099	0644	edit dl rm
exception.hpp	848	0644	edit dl rm
free.hpp	22187	0644	edit dl rm
is_empty.hpp	605	0644	edit dl rm
is_placeholder.hpp	830	0644	edit dl rm
is_subconcept.hpp	5377	0644	edit dl rm
iterator.hpp	9799	0644	edit dl rm
member.hpp	16813	0644	edit dl rm
operators.hpp	23235	0644	edit dl rm
param.hpp	9026	0644	edit dl rm
placeholder.hpp	2107	0644	edit dl rm
placeholder_of.hpp	1480	0644	edit dl rm
rebind_any.hpp	2018	0644	edit dl rm
register_binding.hpp	6431	0644	edit dl rm
relaxed.hpp	2646	0644	edit dl rm
require_match.hpp	7418	0644	edit dl rm
same_type.hpp	942	0644	edit dl rm
static_binding.hpp	831	0644	edit dl rm
tuple.hpp	17723	0644	edit dl rm
typeid_of.hpp	1866	0644	edit dl rm

Edit: /usr/include/boost/type_erasure/binding.hpp (9045B)

// Boost.TypeErasure library
//
// Copyright 2011 Steven Watanabe
//
// Distributed under 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)
//
// $Id$

#ifndef BOOST_TYPE_ERASURE_BINDING_HPP_INCLUDED
#define BOOST_TYPE_ERASURE_BINDING_HPP_INCLUDED

#include <boost/config.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/mpl/transform.hpp>
#include <boost/mpl/find_if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/end.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/pair.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_erasure/static_binding.hpp>
#include <boost/type_erasure/is_subconcept.hpp>
#include <boost/type_erasure/detail/adapt_to_vtable.hpp>
#include <boost/type_erasure/detail/null.hpp>
#include <boost/type_erasure/detail/rebind_placeholders.hpp>
#include <boost/type_erasure/detail/vtable.hpp>
#include <boost/type_erasure/detail/normalize.hpp>
#include <boost/type_erasure/detail/instantiate.hpp>
#include <boost/type_erasure/detail/check_map.hpp>

namespace boost {
namespace type_erasure {

template<class P>
class dynamic_binding;

namespace detail {

template<class Source, class Dest, class Map>
struct can_optimize_conversion : ::boost::mpl::and_<
    ::boost::is_same<Source, Dest>,
        ::boost::is_same<
            typename ::boost::mpl::find_if<
                Map,
                ::boost::mpl::not_<
                    ::boost::is_same<
                        ::boost::mpl::first< ::boost::mpl::_1>,
                        ::boost::mpl::second< ::boost::mpl::_1>
                    >
                >
            >::type,
            typename ::boost::mpl::end<Map>::type
        >
    >::type
{};

}

/**
 * Stores the binding of a @c Concept to a set of actual types.
 * @c Concept is interpreted in the same way as with @ref any.
 */
template<class Concept>
class binding
{
    typedef typename ::boost::type_erasure::detail::normalize_concept<
        Concept>::type normalized;
    typedef typename ::boost::mpl::transform<normalized,
        ::boost::type_erasure::detail::maybe_adapt_to_vtable< ::boost::mpl::_1>
    >::type actual_concept;
    typedef typename ::boost::type_erasure::detail::make_vtable<
        actual_concept>::type table_type;
    typedef typename ::boost::type_erasure::detail::get_placeholder_normalization_map<
        Concept
    >::type placeholder_subs;
public:

/**
     * \pre @ref relaxed must be in @c Concept.
     *
     * \throws Nothing.
     */
    binding() { BOOST_MPL_ASSERT((::boost::type_erasure::is_relaxed<Concept>)); }
    
    /**
     * \pre @c Map must be an MPL map with an entry for each placeholder
     *      referred to by @c Concept.
     *
     * \throws Nothing.
     */
    template<class Map>
    explicit binding(const Map&)
      : impl((
            BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map),
            static_binding<Map>()
        ))
    {}
    
    /**
     * \pre @c Map must be an MPL map with an entry for each placeholder
     *      referred to by @c Concept.
     *
     * \throws Nothing.
     */
    template<class Map>
    binding(const static_binding<Map>&)
      : impl((
            BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map),
            static_binding<Map>()
        ))
    {}

/**
     * Converts from another set of bindings.
     *
     * \pre Map must be an MPL map with an entry for each placeholder
     *      referred to by @c Concept.  The mapped type should be the
     *      corresponding placeholder in Concept2.
     *
     * \throws std::bad_alloc
     */
    template<class Concept2, class Map>
    binding(const binding<Concept2>& other, const Map&
#ifndef BOOST_TYPE_ERASURE_DOXYGEN
        , typename ::boost::enable_if<
            ::boost::mpl::and_<
                ::boost::type_erasure::detail::check_map<Concept, Map>,
                ::boost::type_erasure::is_subconcept<Concept, Concept2, Map>
            >
        >::type* = 0
#endif
        )
      : impl(
            other,
            static_binding<Map>(),
            ::boost::type_erasure::detail::can_optimize_conversion<Concept2, Concept, Map>()
        )
    {}

/**
     * Converts from another set of bindings.
     *
     * \pre Map must be an MPL map with an entry for each placeholder
     *      referred to by @c Concept.  The mapped type should be the
     *      corresponding placeholder in Concept2.
     *
     * \throws std::bad_alloc
     */
    template<class Concept2, class Map>
    binding(const binding<Concept2>& other, const static_binding<Map>&
#ifndef BOOST_TYPE_ERASURE_DOXYGEN
        , typename ::boost::enable_if<
            ::boost::mpl::and_<
                ::boost::type_erasure::detail::check_map<Concept, Map>,
                ::boost::type_erasure::is_subconcept<Concept, Concept2, Map>
            >
        >::type* = 0
#endif
        )
      : impl(
            other,
            static_binding<Map>(),
            ::boost::type_erasure::detail::can_optimize_conversion<Concept2, Concept, Map>()
        )
    {}

/**
     * Converts from another set of bindings.
     *
     * \pre Map must be an MPL map with an entry for each placeholder
     *      referred to by @c Concept.  The mapped type should be the
     *      corresponding placeholder in Concept2.
     *
     * \throws std::bad_alloc
     * \throws std::bad_any_cast
     */
    template<class Placeholders, class Map>
    binding(const dynamic_binding<Placeholders>& other, const static_binding<Map>&)
      : impl(
            other,
            static_binding<Map>()
        )
    {}

/**
     * \return true iff the sets of types that the placeholders
     *         bind to are the same for both arguments.
     *
     * \throws Nothing.
     */
    friend bool operator==(const binding& lhs, const binding& rhs)
    { return *lhs.impl.table == *rhs.impl.table; }
    
    /**
     * \return true iff the arguments do not map to identical
     *         sets of types.
     *
     * \throws Nothing.
     */
    friend bool operator!=(const binding& lhs, const binding& rhs)
    { return !(lhs == rhs); }

/** INTERNAL ONLY */
    template<class T>
    typename T::type find() const { return impl.table->lookup((T*)0); }
private:
    template<class C2>
    friend class binding;
    template<class P>
    friend class dynamic_binding;
    /** INTERNAL ONLY */
    struct impl_type
    {
        impl_type() {
            table = &::boost::type_erasure::detail::make_vtable_init<
                typename ::boost::mpl::transform<
                    actual_concept,
                    ::boost::type_erasure::detail::get_null_vtable_entry<
                        ::boost::mpl::_1
                    >
                >::type,
                table_type
            >::type::value;
        }
        template<class Map>
        impl_type(const static_binding<Map>&)
        {
            table = &::boost::type_erasure::detail::make_vtable_init<
                typename ::boost::mpl::transform<
                    actual_concept,
                    ::boost::type_erasure::detail::rebind_placeholders<
                        ::boost::mpl::_1,
                        typename ::boost::type_erasure::detail::add_deductions<
                            Map,
                            placeholder_subs
                        >::type
                    >
                >::type,
                table_type
            >::type::value;
        }
        template<class Concept2, class Map>
        impl_type(const binding<Concept2>& other, const static_binding<Map>&, boost::mpl::false_)
          : manager(new table_type)
        {
            manager->template convert_from<
                typename ::boost::type_erasure::detail::convert_deductions<
                    Map,
                    placeholder_subs,
                    typename binding<Concept2>::placeholder_subs
                >::type
            >(*other.impl.table);
            table = manager.get();
        }
        template<class PlaceholderList, class Map>
        impl_type(const dynamic_binding<PlaceholderList>& other, const static_binding<Map>&)
          : manager(new table_type)
        {
            manager->template convert_from<
                // FIXME: What do we need to do with deduced placeholder in other
                typename ::boost::type_erasure::detail::add_deductions<
                    Map,
                    placeholder_subs
                >::type
            >(other.impl);
            table = manager.get();
        }
        template<class Concept2, class Map>
        impl_type(const binding<Concept2>& other, const static_binding<Map>&, boost::mpl::true_)
          : table(other.impl.table),
            manager(other.impl.manager)
        {}
        const table_type* table;
        ::boost::shared_ptr<table_type> manager;
    } impl;
};

}
}

#endif

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