ceph/src/boost/libs/numeric/odeint/include/boost/numeric/odeint/util/n_ary_helper.hpp

   1 /*
   2  [auto_generated]
   3  boost/numeric/odeint/util/n_ary_helper.hpp
   4
   5  Macros to generate scale_sumN and for_eachN functors.
   6
   7  Copyright 2013 Karsten Ahnert
   8  Copyright 2013 Mario Mulansky
   9  Copyright 2013 Pascal Germroth
  10
  11  Distributed under the Boost Software License, Version 1.0.
  12  (See accompanying file LICENSE_1_0.txt or
  13  copy at http://www.boost.org/LICENSE_1_0.txt)
  14  */
  15
  16 #ifndef BOOST_NUMERIC_ODEINT_UTIL_N_ARY_HELPER_HPP_INCLUDED
  17 #define BOOST_NUMERIC_ODEINT_UTIL_N_ARY_HELPER_HPP_INCLUDED
  18
  19 #include <boost/preprocessor/repetition.hpp>
  20
  21 // like BOOST_PP_ENUM_SHIFTED but with a comma in front like _TRAILING
  22 #define BOOST_ODEINT_ENUM_TRAILING_SHIFTED_PARAMS(count, param) \
  23     BOOST_PP_COMMA_IF(BOOST_PP_DEC(count)) \
  24     BOOST_PP_ENUM_SHIFTED_PARAMS(count, param)
  25
  26 #define BOOST_ODEINT_ENUM_TRAILING_SHIFTED_BINARY_PARAMS(count, p1, p2) \
  27     BOOST_PP_COMMA_IF(BOOST_PP_DEC(count)) \
  28     BOOST_PP_ENUM_SHIFTED_BINARY_PARAMS(count, p1, p2)
  29
  30 // like BOOST_PP_ENUM_SHIFTED_BINARY_PARAMS(n, p1, p2) but p2 is shifted left.
  31 // generate "p1 ## 0 = p2, p1 ## 1 = p3 ## 0, p1 ## 2 = p3 ## 1"
  32 #define BOOST_ODEINT_ENUM_LSHIFTED_BINARY_PARAMS(count, p1, p2, p3) \
  33     BOOST_PP_ENUM(count, BOOST_ODEINT_ENUM_LSHIFTED_BINARY_PARAMS_, (p1, p2, p3))
  34 #define BOOST_ODEINT_ENUM_LSHIFTED_BINARY_PARAMS_(z, n, data) \
  35     BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(3, 0, data), n) \
  36     BOOST_PP_IF(n, \
  37         BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(3, 2, data), BOOST_PP_DEC(n)), \
  38         BOOST_PP_TUPLE_ELEM(3, 1, data))
  39
  40 // like BOOST_PP_ENUM_BINARY_PARAMS(n, p1, p2) but with statements.
  41 // "p1 ## 0 p2 ## 0 ; p1 ## 1 p2 ## 1 ; ..."
  42 #define BOOST_ODEINT_ENUM_BINARY_STATEMENTS(count, p1, p2) \
  43     BOOST_PP_REPEAT(count, BOOST_ODEINT_ENUM_BINARY_STATEMENTS_, (p1, p2))
  44 #define BOOST_ODEINT_ENUM_BINARY_STATEMENTS_(z, n, data) \
  45     BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 0, data), n) \
  46     BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 1, data), n) ;
  47
  48 // like BOOST_PP_ENUM_BINARY_PARAMS(n, p1, p2) but p2 is in parens.
  49 // "p1 ## 0 (p2 ## 0) , p1 ## 1 (p2 ## 1) , ..."
  50 #define BOOST_ODEINT_ENUM_UNARY_CALLS(count, p1, p2) \
  51     BOOST_PP_ENUM(count, BOOST_ODEINT_ENUM_UNARY_CALLS_, (p1, p2))
  52 #define BOOST_ODEINT_ENUM_SHIFTED_UNARY_CALLS(count, p1, p2) \
  53     BOOST_PP_ENUM_SHIFTED(count, BOOST_ODEINT_ENUM_UNARY_CALLS_, (p1, p2))
  54 #define BOOST_ODEINT_ENUM_TRAILING_SHIFTED_UNARY_CALLS(count, p1, p2) \
  55     BOOST_PP_COMMA_IF(BOOST_PP_DEC(count)) \
  56     BOOST_PP_ENUM_SHIFTED(count, BOOST_ODEINT_ENUM_UNARY_CALLS_, (p1, p2))
  57 #define BOOST_ODEINT_ENUM_UNARY_CALLS_(z, n, data) \
  58       BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 0, data), n) \
  59     ( BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 1, data), n) )
  60
  61
  62 // maximum arity + 1 for scale_sum and for_each
  63 #define BOOST_ODEINT_N_ARY_MAX 16
  64
  65
  66 // generate scale_sum1 to scale_sumN, operator body generated by macro(N)
  67 #define BOOST_ODEINT_GEN_SCALE_SUM(macro) \
  68     BOOST_PP_REPEAT_FROM_TO(1, BOOST_ODEINT_N_ARY_MAX, BOOST_ODEINT_GEN_SCALE_SUM_, macro)
  69 #define BOOST_ODEINT_GEN_SCALE_SUM_(z, n, macro) \
  70     template< BOOST_ODEINT_ENUM_LSHIFTED_BINARY_PARAMS(n, class Fac, = double, = Fac) > \
  71     struct BOOST_PP_CAT(scale_sum, n) \
  72     { \
  73         BOOST_ODEINT_ENUM_BINARY_STATEMENTS(n, const Fac, m_alpha) \
  74         \
  75         BOOST_PP_CAT(scale_sum, n) \
  76         ( BOOST_PP_ENUM_BINARY_PARAMS(n, Fac, alpha) ) \
  77         : BOOST_ODEINT_ENUM_UNARY_CALLS(n, m_alpha, alpha) {} \
  78         \
  79         template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n), class T) > \
  80         void operator()( T0 &t0 \
  81             BOOST_ODEINT_ENUM_TRAILING_SHIFTED_BINARY_PARAMS(BOOST_PP_INC(n), const T, &t) \
  82         ) const \
  83         { macro(n) } \
  84         typedef void result_type; \
  85     };
  86
  87 // generate for_each1 to for_eachN, body generated by macro(N)
  88 #define BOOST_ODEINT_GEN_FOR_EACH(macro) \
  89     BOOST_PP_REPEAT_FROM_TO(1, BOOST_ODEINT_N_ARY_MAX, BOOST_ODEINT_GEN_FOR_EACH_, macro)
  90 #define BOOST_ODEINT_GEN_FOR_EACH_(z, n, macro) \
  91     template< BOOST_PP_ENUM_PARAMS(n, class S) , class Op > \
  92     static void for_each##n ( BOOST_PP_ENUM_BINARY_PARAMS(n, S, &s) , Op op ) \
  93     { macro(n) }
  94
  95
  96 #endif