map_lookup.hpp

来自「Boost provides free peer-reviewed portab」· HPP 代码 · 共 129 行

/*=============================================================================
    Copyright (c) 2001-2006 Joel de Guzman

    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)
==============================================================================*/
#ifndef BOOST_PP_IS_ITERATING
#if !defined(FUSION_MAP_LOOKUP_07212005_1118)
#define FUSION_MAP_LOOKUP_07212005_1118

#include <boost/preprocessor/iterate.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/arithmetic/dec.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>

#if defined(BOOST_MSVC) && (BOOST_MSVC == 1310)
#pragma warning (push)
#pragma warning(disable: 4348)  // redefinition of default parameter
#endif

    template <typename Key, typename dummy = int>
    struct meta_at_impl
    {
        typedef void_ type;
    };

    template <typename Key, typename dummy = int>
    struct meta_find_impl
    {
        typedef vector_iterator<storage_type, storage_type::size::value> type;
    };

    template <typename Key, typename dummy = int>
    struct meta_find_impl_const
    {
        typedef vector_iterator<storage_type const, storage_type::size::value> type;
    };

    template <typename Key>
    vector_iterator<storage_type const, storage_type::size::value>
    find_impl(mpl::identity<Key>) const
    {
        return vector_iterator<storage_type const, storage_type::size::value>(data);
    }

    template <typename Key>
    vector_iterator<storage_type, storage_type::size::value>
    find_impl(mpl::identity<Key>)
    {
        return vector_iterator<storage_type, storage_type::size::value>(data);
    }

#define BOOST_PP_FILENAME_1 \
    <boost/fusion/container/map/detail/map_lookup.hpp>
#define BOOST_PP_ITERATION_LIMITS (0, BOOST_PP_DEC(FUSION_MAX_MAP_SIZE))
#include BOOST_PP_ITERATE()

#if defined(BOOST_MSVC) && (BOOST_MSVC == 1310)
#pragma warning (pop)
#endif

#endif
#else // defined(BOOST_PP_IS_ITERATING)
///////////////////////////////////////////////////////////////////////////////
//
//  Preprocessor vertical repetition code
//
///////////////////////////////////////////////////////////////////////////////

#define N BOOST_PP_ITERATION()

    template <typename dummy>
    struct meta_at_impl<
        typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type, dummy>
    {
        typedef typename detail::map_value_type<BOOST_PP_CAT(T, N)>::type type;
    };

    typename detail::map_data_type<BOOST_PP_CAT(T, N)>::type
    at_impl(mpl::identity<typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type>)
    {
        return detail::map_lookup_key<
            N
          , typename detail::map_data_type<BOOST_PP_CAT(T, N)>::type
          , typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type
          , storage_type>::call(data);
    }

    typename detail::map_const_data_type<BOOST_PP_CAT(T, N)>::type
    at_impl(mpl::identity<typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type>) const
    {
        return detail::map_lookup_key<
            N
          , typename detail::map_const_data_type<BOOST_PP_CAT(T, N)>::type
          , typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type
          , storage_type const>::call(data);
    }

    template <typename dummy>
    struct meta_find_impl<
        typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type, dummy>
    {
        typedef vector_iterator<storage_type, N> type;
    };

    template <typename dummy>
    struct meta_find_impl_const<
        typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type, dummy>
    {
        typedef vector_iterator<storage_type const, N> type;
    };

    vector_iterator<storage_type, N>
    find_impl(mpl::identity<typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type>)
    {
        return vector_iterator<storage_type, N>(data);
    }

    vector_iterator<storage_type const, N>
    find_impl(mpl::identity<typename detail::map_key_type<BOOST_PP_CAT(T, N), N>::type>) const
    {
        return vector_iterator<storage_type const, N>(data);
    }

#undef N
#endif // defined(BOOST_PP_IS_ITERATING)