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  1.  
  2. #ifndef BOOST_MPL_AUX_PREPROCESSOR_EXT_PARAMS_HPP_INCLUDED
  3. #define BOOST_MPL_AUX_PREPROCESSOR_EXT_PARAMS_HPP_INCLUDED
  4.  
  5. // Copyright Aleksey Gurtovoy 2000-2004
  6. //
  7. // Distributed under the Boost Software License, Version 1.0.
  8. // (See accompanying file LICENSE_1_0.txt or copy at
  9. // http://www.boost.org/LICENSE_1_0.txt)
  10. //
  11. // See http://www.boost.org/libs/mpl for documentation.
  12.  
  13. // $Id$
  14. // $Date$
  15. // $Revision$
  16.  
  17. #include <boost/mpl/aux_/config/preprocessor.hpp>
  18.  
  19. // BOOST_MPL_PP_EXT_PARAMS(2,2,T): <nothing>
  20. // BOOST_MPL_PP_EXT_PARAMS(2,3,T): T2
  21. // BOOST_MPL_PP_EXT_PARAMS(2,4,T): T2, T3
  22. // BOOST_MPL_PP_EXT_PARAMS(2,n,T): T2, T3, .., Tn-1
  23.  
  24. #if !defined(BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES)
  25.  
  26. #   include <boost/mpl/aux_/preprocessor/filter_params.hpp>
  27. #   include <boost/mpl/aux_/preprocessor/sub.hpp>
  28.  
  29. #   define BOOST_MPL_PP_EXT_PARAMS(i,j,p) \
  30.     BOOST_MPL_PP_EXT_PARAMS_DELAY_1(i,BOOST_MPL_PP_SUB(j,i),p) \
  31.     /**/
  32.  
  33. #   define BOOST_MPL_PP_EXT_PARAMS_DELAY_1(i,n,p) \
  34.     BOOST_MPL_PP_EXT_PARAMS_DELAY_2(i,n,p) \
  35.     /**/
  36.  
  37. #   define BOOST_MPL_PP_EXT_PARAMS_DELAY_2(i,n,p) \
  38.     BOOST_MPL_PP_EXT_PARAMS_##i(n,p) \
  39.     /**/
  40.  
  41. #   define BOOST_MPL_PP_EXT_PARAMS_1(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##1,p##2,p##3,p##4,p##5,p##6,p##7,p##8,p##9)
  42. #   define BOOST_MPL_PP_EXT_PARAMS_2(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##2,p##3,p##4,p##5,p##6,p##7,p##8,p##9,p1)
  43. #   define BOOST_MPL_PP_EXT_PARAMS_3(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##3,p##4,p##5,p##6,p##7,p##8,p##9,p1,p2)
  44. #   define BOOST_MPL_PP_EXT_PARAMS_4(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##4,p##5,p##6,p##7,p##8,p##9,p1,p2,p3)
  45. #   define BOOST_MPL_PP_EXT_PARAMS_5(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##5,p##6,p##7,p##8,p##9,p1,p2,p3,p4)
  46. #   define BOOST_MPL_PP_EXT_PARAMS_6(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##6,p##7,p##8,p##9,p1,p2,p3,p4,p5)
  47. #   define BOOST_MPL_PP_EXT_PARAMS_7(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##7,p##8,p##9,p1,p2,p3,p4,p5,p6)
  48. #   define BOOST_MPL_PP_EXT_PARAMS_8(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##8,p##9,p1,p2,p3,p4,p5,p6,p7)
  49. #   define BOOST_MPL_PP_EXT_PARAMS_9(i,p) BOOST_MPL_PP_FILTER_PARAMS_##i(p##9,p1,p2,p3,p4,p5,p6,p7,p8)
  50.  
  51. #else
  52.  
  53. #   include <boost/preprocessor/arithmetic/add.hpp>
  54. #   include <boost/preprocessor/arithmetic/sub.hpp>
  55. #   include <boost/preprocessor/comma_if.hpp>
  56. #   include <boost/preprocessor/repeat.hpp>
  57. #   include <boost/preprocessor/tuple/elem.hpp>
  58. #   include <boost/preprocessor/cat.hpp>
  59.  
  60. #   define BOOST_MPL_PP_AUX_EXT_PARAM_FUNC(unused, i, op) \
  61.     BOOST_PP_COMMA_IF(i) \
  62.     BOOST_PP_CAT( \
  63.           BOOST_PP_TUPLE_ELEM(2,1,op) \
  64.         , BOOST_PP_ADD_D(1, i, BOOST_PP_TUPLE_ELEM(2,0,op)) \
  65.         ) \
  66.     /**/
  67.  
  68. #   define BOOST_MPL_PP_EXT_PARAMS(i, j, param) \
  69.     BOOST_PP_REPEAT( \
  70.           BOOST_PP_SUB_D(1,j,i) \
  71.         , BOOST_MPL_PP_AUX_EXT_PARAM_FUNC \
  72.         , (i,param) \
  73.         ) \
  74.     /**/
  75.  
  76. #endif
  77.  
  78. #endif // BOOST_MPL_AUX_PREPROCESSOR_EXT_PARAMS_HPP_INCLUDED
  79.  
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