ceph/src/boost/libs/multi_index/include/boost/multi_index/indexed_by.hpp

   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