boost/multi_index/indexed_by.hpp
/* Copyright 2003-2013 Joaquin M Lopez Munoz. * 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) * * See http://www.boost.org/libs/multi_index for library home page. */ #ifndef BOOST_MULTI_INDEX_INDEXED_BY_HPP #define BOOST_MULTI_INDEX_INDEXED_BY_HPP #if defined(_MSC_VER) #pragma once #endif #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ #include <boost/mpl/vector.hpp> #include <boost/preprocessor/cat.hpp> #include <boost/preprocessor/control/expr_if.hpp> #include <boost/preprocessor/repetition/enum.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> /* An alias to mpl::vector used to hide MPL from the user. * indexed_by contains the index specifiers for instantiation * of a multi_index_container. */ /* This user_definable macro limits the number of elements of an index list; * useful for shortening resulting symbol names (MSVC++ 6.0, for instance, * has problems coping with very long symbol names.) */ #if !defined(BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE) #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE #endif #if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \ BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE #else #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE #endif #define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \ typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na) namespace boost{ namespace multi_index{ template< BOOST_PP_ENUM( BOOST_MULTI_INDEX_INDEXED_BY_SIZE, BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T) > struct indexed_by: mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)> { }; } /* namespace multi_index */ } /* namespace boost */ #undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM #undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE #endif