1 /* Copyright 2003-2013 Joaquin M Lopez Munoz. 2 * Distributed under the Boost Software License, Version 1.0. 3 * (See accompanying file LICENSE_1_0.txt or copy at 4 * http://www.boost.org/LICENSE_1_0.txt) 5 * 6 * See http://www.boost.org/libs/multi_index for library home page. 7 */ 8 9 #ifndef BOOST_MULTI_INDEX_INDEXED_BY_HPP 10 #define BOOST_MULTI_INDEX_INDEXED_BY_HPP 11 12 #if defined(_MSC_VER) 13 #pragma once 14 #endif 15 16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ 17 #include <boost/mpl/vector.hpp> 18 #include <boost/preprocessor/cat.hpp> 19 #include <boost/preprocessor/control/expr_if.hpp> 20 #include <boost/preprocessor/repetition/enum.hpp> 21 #include <boost/preprocessor/repetition/enum_params.hpp> 22 23 /* An alias to mpl::vector used to hide MPL from the user. 24 * indexed_by contains the index specifiers for instantiation 25 * of a multi_index_container. 26 */ 27 28 /* This user_definable macro limits the number of elements of an index list; 29 * useful for shortening resulting symbol names (MSVC++ 6.0, for instance, 30 * has problems coping with very long symbol names.) 31 */ 32 33 #if !defined(BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE) 34 #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE 35 #endif 36 37 #if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE 38 #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \ 39 BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE 40 #else 41 #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE 42 #endif 43 44 #define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \ 45 typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na) 46 47 namespace boost{ 48 49 namespace multi_index{ 50 51 template< 52 BOOST_PP_ENUM( 53 BOOST_MULTI_INDEX_INDEXED_BY_SIZE, 54 BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T) 55 > 56 struct indexed_by: 57 mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)> 58 { 59 }; 60 61 } /* namespace multi_index */ 62 63 } /* namespace boost */ 64 65 #undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM 66 #undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE 67 68 #endif 69