williamr@2: /* Copyright 2003-2005 Joaquín M López Muñoz.
williamr@2:  * Distributed under the Boost Software License, Version 1.0.
williamr@2:  * (See accompanying file LICENSE_1_0.txt or copy at
williamr@2:  * http://www.boost.org/LICENSE_1_0.txt)
williamr@2:  *
williamr@2:  * See http://www.boost.org/libs/multi_index for library home page.
williamr@2:  */
williamr@2: 
williamr@2: #ifndef BOOST_MULTI_INDEX_INDEXED_BY_HPP
williamr@2: #define BOOST_MULTI_INDEX_INDEXED_BY_HPP
williamr@2: 
williamr@2: #if defined(_MSC_VER)&&(_MSC_VER>=1200)
williamr@2: #pragma once
williamr@2: #endif
williamr@2: 
williamr@2: #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
williamr@2: #include <boost/mpl/vector.hpp>
williamr@2: #include <boost/preprocessor/cat.hpp>
williamr@2: #include <boost/preprocessor/control/expr_if.hpp>
williamr@2: #include <boost/preprocessor/repetition/enum.hpp>
williamr@2: #include <boost/preprocessor/repetition/enum_params.hpp> 
williamr@2: 
williamr@2: /* An alias to mpl::vector used to hide MPL from the user.
williamr@2:  * indexed_by contains the index specifiers for instantiation
williamr@2:  * of a multi_index_container.
williamr@2:  */
williamr@2: 
williamr@2: /* This user_definable macro limits the number of elements of an index list;
williamr@2:  * useful for shortening resulting symbol names (MSVC++ 6.0, for instance,
williamr@2:  * has problems coping with very long symbol names.)
williamr@2:  */
williamr@2: 
williamr@2: #if !defined(BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE)
williamr@2: #if defined(BOOST_MSVC)&&(BOOST_MSVC<1300)
williamr@2: #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE 5
williamr@2: #else
williamr@2: #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
williamr@2: #endif
williamr@2: #endif
williamr@2: 
williamr@2: #if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE
williamr@2: #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \
williamr@2:   BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE
williamr@2: #else
williamr@2: #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
williamr@2: #endif
williamr@2: 
williamr@2: #define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \
williamr@2:   typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na)
williamr@2: 
williamr@2: namespace boost{
williamr@2: 
williamr@2: namespace multi_index{
williamr@2: 
williamr@2: template<
williamr@2:   BOOST_PP_ENUM(
williamr@2:     BOOST_MULTI_INDEX_INDEXED_BY_SIZE,
williamr@2:     BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T)
williamr@2: >
williamr@2: struct indexed_by:
williamr@2:   mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)>
williamr@2: {
williamr@2: };
williamr@2: 
williamr@2: } /* namespace multi_index */
williamr@2: 
williamr@2: } /* namespace boost */
williamr@2: 
williamr@2: #undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM
williamr@2: #undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE
williamr@2: 
williamr@2: #endif