text: 
  //  (C) Copyright Edward Diener 2011-2015
  //  Use, modification and distribution are subject to 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).
  
  #if !defined(BOOST_VMD_DETAIL_DATA_EQUAL_COMMON_HPP)
  #define BOOST_VMD_DETAIL_DATA_EQUAL_COMMON_HPP
  
  #include <boost/preprocessor/arithmetic/inc.hpp>
  #include <boost/preprocessor/array/elem.hpp>
  #include <boost/preprocessor/array/size.hpp>
  #include <boost/preprocessor/comparison/equal.hpp>
  #include <boost/preprocessor/control/iif.hpp>
  #include <boost/preprocessor/list/at.hpp>
  #include <boost/preprocessor/list/size.hpp>
  #include <boost/preprocessor/logical/bitand.hpp>
  #include <boost/preprocessor/logical/bitor.hpp>
  #include <boost/preprocessor/logical/compl.hpp>
  #include <boost/preprocessor/punctuation/is_begin_parens.hpp>
  #include <boost/preprocessor/seq/elem.hpp>
  #include <boost/preprocessor/seq/size.hpp>
  #include <boost/preprocessor/tuple/elem.hpp>
  #include <boost/preprocessor/tuple/pop_front.hpp>
  #include <boost/preprocessor/tuple/push_back.hpp>
  #include <boost/preprocessor/tuple/replace.hpp>
  #include <boost/preprocessor/tuple/size.hpp>
  #include <boost/vmd/empty.hpp>
  #include <boost/vmd/is_empty.hpp>
  #include <boost/vmd/get_type.hpp>
  #include <boost/vmd/detail/equal_type.hpp>
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_IS_BOTH_COMPOSITE(vseq1,vseq2) \
      BOOST_PP_BITAND \
          ( \
          BOOST_PP_IS_BEGIN_PARENS(vseq1), \
          BOOST_PP_IS_BEGIN_PARENS(vseq2) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_ARRAY(d,index,data) \
      BOOST_PP_ARRAY_ELEM(index,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_LIST(d,index,data) \
      BOOST_PP_LIST_AT_D(d,data,index) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_SEQ(d,index,data) \
      BOOST_PP_SEQ_ELEM(index,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_TUPLE(d,index,data) \
      BOOST_PP_TUPLE_ELEM(index,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_ARRAY(data) \
      BOOST_PP_ARRAY_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_LIST(data) \
      BOOST_PP_LIST_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_SEQ(data) \
      BOOST_PP_SEQ_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_TUPLE(data) \
      BOOST_PP_TUPLE_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_ARRAY_D(d,data) \
      BOOST_PP_ARRAY_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_LIST_D(d,data) \
      BOOST_PP_LIST_SIZE_D(d,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_SEQ_D(d,data) \
      BOOST_PP_SEQ_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_TUPLE_D(d,data) \
      BOOST_PP_TUPLE_SIZE(data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM(d,index,data,vtype) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_ARRAY), \
          BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_ARRAY, \
          BOOST_PP_IIF \
              ( \
              BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_LIST), \
              BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_LIST, \
              BOOST_PP_IIF \
                  ( \
                  BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_SEQ), \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_SEQ, \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM_TUPLE \
                  ) \
              ) \
          ) \
      (d,index,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE(data,vtype) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_EQUAL_TYPE(vtype,BOOST_VMD_TYPE_ARRAY), \
          BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_ARRAY, \
          BOOST_PP_IIF \
              ( \
              BOOST_VMD_DETAIL_EQUAL_TYPE(vtype,BOOST_VMD_TYPE_LIST), \
              BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_LIST, \
              BOOST_PP_IIF \
                  ( \
                  BOOST_VMD_DETAIL_EQUAL_TYPE(vtype,BOOST_VMD_TYPE_SEQ), \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_SEQ, \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_TUPLE \
                  ) \
              ) \
          ) \
      (data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_D(d,data,vtype) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_ARRAY), \
          BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_ARRAY_D, \
          BOOST_PP_IIF \
              ( \
              BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_LIST), \
              BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_LIST_D, \
              BOOST_PP_IIF \
                  ( \
                  BOOST_VMD_DETAIL_EQUAL_TYPE_D(d,vtype,BOOST_VMD_TYPE_SEQ), \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_SEQ_D, \
                  BOOST_VMD_DETAIL_DATA_EQUAL_GET_SIZE_TUPLE_D \
                  ) \
              ) \
          ) \
      (d,data) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_RESULT(state) \
      BOOST_PP_TUPLE_ELEM(0,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_FIRST(state) \
      BOOST_PP_TUPLE_ELEM(1,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_SECOND(state) \
      BOOST_PP_TUPLE_ELEM(2,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_SIZE(state) \
      BOOST_PP_TUPLE_ELEM(3,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_TYPE(state) \
      BOOST_PP_TUPLE_ELEM(4,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state) \
      BOOST_PP_TUPLE_ELEM(5,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state) \
      BOOST_PP_TUPLE_ELEM(6,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PROCESSING(d,state) \
      BOOST_PP_BITAND \
          ( \
          BOOST_PP_EQUAL_D \
              ( \
              d, \
              BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state), \
              BOOST_VMD_DETAIL_DATA_EQUAL_STATE_SIZE(state) \
              ), \
          BOOST_PP_COMPL(BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_EMPTY(state)) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_EMPTY(state) \
      BOOST_VMD_IS_EMPTY(BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state)) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_INDEX(state) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_EMPTY(state), \
          BOOST_VMD_EMPTY, \
          BOOST_PP_TUPLE_ELEM \
          ) \
      (0,BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state)) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP_NE_EMPTY(d,state) \
      BOOST_PP_TUPLE_REPLACE_D \
          ( \
          d, \
          state, \
          6, \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP_NE_REMOVE(d,state) \
      BOOST_PP_TUPLE_REPLACE_D \
          ( \
          d, \
          state, \
          6, \
          BOOST_PP_TUPLE_POP_FRONT(BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state)) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP(d,state) \
      BOOST_PP_IIF \
          ( \
          BOOST_PP_EQUAL_D(d,BOOST_PP_TUPLE_SIZE(BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state)),1), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP_NE_EMPTY, \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP_NE_REMOVE \
          ) \
      (d,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH_CREATE(d,state) \
      BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS \
          ( \
          d, \
          BOOST_PP_TUPLE_REPLACE_D \
              ( \
              d, \
              state, \
              6, \
              (BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state)) \
              ) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH_ADD(d,state) \
      BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS \
          ( \
          d, \
          BOOST_PP_TUPLE_REPLACE_D \
              ( \
              d, \
              state, \
              6, \
              BOOST_PP_TUPLE_PUSH_BACK \
                  ( \
                  BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP(state), \
                  BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state) \
                  ) \
              ) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH(d,state) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_EMPTY(state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH_CREATE, \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH_ADD \
          ) \
      (d,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_GET_INDEX(d,state) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PROCESSING(d,state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_INDEX, \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX \
          ) \
      (state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_GET_FIRST_ELEMENT(d,state) \
      BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM \
          ( \
          d, \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_GET_INDEX(d,state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_FIRST(state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_TYPE(state) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_STATE_GET_SECOND_ELEMENT(d,state) \
      BOOST_VMD_DETAIL_DATA_EQUAL_GET_ELEM \
          ( \
          d, \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_GET_INDEX(d,state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_SECOND(state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_TYPE(state) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_PRED(d,state) \
      BOOST_PP_BITAND \
          ( \
          BOOST_PP_EQUAL_D \
              ( \
              d, \
              BOOST_VMD_DETAIL_DATA_EQUAL_STATE_RESULT(state), \
              1 \
              ), \
          BOOST_PP_BITOR \
              ( \
              BOOST_PP_NOT_EQUAL_D \
                  ( \
                  d, \
                  BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state), \
                  BOOST_VMD_DETAIL_DATA_EQUAL_STATE_SIZE(state) \
                  ), \
              BOOST_PP_COMPL \
                  ( \
                  BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_EMPTY(state) \
                  ) \
              ) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS_NCP(d,state) \
      BOOST_PP_TUPLE_REPLACE_D \
          ( \
          d, \
          state, \
          5, \
          BOOST_PP_INC(BOOST_VMD_DETAIL_DATA_EQUAL_STATE_INDEX(state)) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS(d,state) \
      BOOST_PP_IIF \
          ( \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PROCESSING(d,state), \
          BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_POP, \
          BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS_NCP \
          ) \
      (d,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_OP_FAILURE(d,state) \
      BOOST_PP_TUPLE_REPLACE_D \
          ( \
          d, \
          state, \
          0, \
          0 \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_OP_RESULT(d,state,result) \
      BOOST_PP_IIF \
          ( \
          BOOST_PP_EQUAL_D(d,result,0), \
          BOOST_VMD_DETAIL_DATA_EQUAL_OP_FAILURE, \
          BOOST_PP_IIF \
              ( \
              BOOST_PP_EQUAL_D(d,result,1), \
              BOOST_VMD_DETAIL_DATA_EQUAL_OP_SUCCESS, \
              BOOST_VMD_DETAIL_DATA_EQUAL_STATE_COMP_PUSH \
              ) \
          ) \
      (d,state) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_TYPE(emf,ems,vtype) \
      BOOST_PP_BITAND \
          ( \
          BOOST_VMD_DETAIL_EQUAL_TYPE \
              ( \
              BOOST_VMD_GET_TYPE(emf), \
              vtype \
              ), \
          BOOST_VMD_DETAIL_EQUAL_TYPE \
              ( \
              BOOST_VMD_GET_TYPE(ems), \
              vtype \
              ) \
          ) \
  /**/
  
  #define BOOST_VMD_DETAIL_DATA_EQUAL_TYPE_D(d,emf,ems,vtype) \
      BOOST_PP_BITAND \
          ( \
          BOOST_VMD_DETAIL_EQUAL_TYPE_D \
              ( \
              d, \
              BOOST_VMD_GET_TYPE(emf), \
              vtype \
              ), \
          BOOST_VMD_DETAIL_EQUAL_TYPE_D \
              ( \
              d, \
              BOOST_VMD_GET_TYPE(ems), \
              vtype \
              ) \
          ) \
  /**/
  
  #endif /* BOOST_VMD_DETAIL_DATA_EQUAL_COMMON_HPP */
  