ceph/src/boost/boost/parameter/aux_/python/invoker_iterate.hpp

   1 // Copyright Daniel Wallin 2005. Use, modification and distribution is
   2 // subject to the Boost Software License, Version 1.0. (See accompanying
   3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/preprocessor/cat.hpp>
   6 #include <boost/preprocessor/dec.hpp>
   7 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
   8 #include <boost/preprocessor/repetition/repeat_from_to.hpp>
   9
  10 #define N BOOST_PP_ITERATION()
  11
  12 #define BOOST_PARAMETER_PY_ARG_TYPES(z, n, _) \
  13     typedef typename mpl::next< \
  14         BOOST_PP_CAT(iter,BOOST_PP_DEC(n)) \
  15     >::type BOOST_PP_CAT(iter,n); \
  16     \
  17     typedef typename mpl::deref<BOOST_PP_CAT(iter,n)>::type BOOST_PP_CAT(spec,n); \
  18     typedef typename mpl::if_< \
  19         mpl::and_< \
  20             mpl::not_<typename BOOST_PP_CAT(spec,n)::required> \
  21           , typename BOOST_PP_CAT(spec,n)::optimized_default \
  22         > \
  23       , parameter::aux::maybe<typename BOOST_PP_CAT(spec,n)::type> \
  24       , typename BOOST_PP_CAT(spec,n)::type \
  25     >::type BOOST_PP_CAT(arg,n); \
  26     typedef typename BOOST_PP_CAT(spec,n)::keyword BOOST_PP_CAT(kw,n);
  27
  28 #if BOOST_PP_ITERATION_FLAGS() == 1
  29 template <class M, class R, class Args>
  30 struct invoker<N, M, R, Args>
  31 #elif BOOST_PP_ITERATION_FLAGS() == 2
  32 template <class T, class R, class Args>
  33 struct call_invoker<N, T, R, Args>
  34 #elif BOOST_PP_ITERATION_FLAGS() == 3
  35 template <class T, class Args>
  36 struct init_invoker<N, T, Args>
  37 #elif BOOST_PP_ITERATION_FLAGS() == 4
  38 template <class M, class R, class T, class Args>
  39 struct member_invoker<N, M, R, T, Args>
  40 #endif
  41 {
  42     typedef typename mpl::begin<Args>::type iter0;
  43     typedef typename mpl::deref<iter0>::type spec0;
  44     typedef typename mpl::if_<
  45         mpl::and_<
  46             mpl::not_<typename spec0::required>
  47           , typename spec0::optimized_default
  48         >
  49       , parameter::aux::maybe<typename spec0::type>
  50       , typename spec0::type
  51     >::type arg0;
  52     typedef typename spec0::keyword kw0;
  53
  54     BOOST_PP_REPEAT_FROM_TO(1, N, BOOST_PARAMETER_PY_ARG_TYPES, ~)
  55
  56     static
  57 #if BOOST_PP_ITERATION_FLAGS() == 3
  58     T*
  59 #else
  60     R
  61 #endif
  62     execute(
  63 #if BOOST_PP_ITERATION_FLAGS() == 2 || BOOST_PP_ITERATION_FLAGS() == 4
  64         T& self
  65       ,
  66 #endif
  67         BOOST_PP_ENUM_BINARY_PARAMS(N, arg, a)
  68     )
  69     {
  70         return
  71 #if BOOST_PP_ITERATION_FLAGS() == 1 || BOOST_PP_ITERATION_FLAGS() == 4
  72          M()(
  73               boost::type<R>()
  74 # if BOOST_PP_ITERATION_FLAGS() == 4
  75             , self
  76 # endif
  77             , BOOST_PP_ENUM_BINARY_PARAMS(N, parameter::keyword<kw, >::get() = a)
  78          );
  79 #elif BOOST_PP_ITERATION_FLAGS() == 2
  80          self(
  81             BOOST_PP_ENUM_BINARY_PARAMS(N, parameter::keyword<kw, >::get() = a)
  82          );
  83 #elif BOOST_PP_ITERATION_FLAGS() == 3
  84          new T(
  85              BOOST_PP_ENUM_BINARY_PARAMS(N, parameter::keyword<kw, >::get() = a)
  86          );
  87 #endif
  88     }
  89 };
  90
  91 #undef BOOST_PARAMETER_PY_ARG_TYPES
  92 #undef N
  93