ceph/src/boost/libs/python/include/boost/python/detail/result.hpp

   1 #if !defined(BOOST_PP_IS_ITERATING)
   2
   3 // Copyright David Abrahams 2002.
   4 // Distributed under the Boost Software License, Version 1.0. (See
   5 // accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 # ifndef RESULT_DWA2002521_HPP
   9 #  define RESULT_DWA2002521_HPP
  10
  11 #  include <boost/type.hpp>
  12
  13 #  include <boost/python/detail/preprocessor.hpp>
  14
  15 #  include <boost/type_traits/object_traits.hpp>
  16 #  include <boost/mpl/if.hpp>
  17
  18 #  include <boost/preprocessor/comma_if.hpp>
  19 #  include <boost/preprocessor/iterate.hpp>
  20 #  include <boost/preprocessor/debug/line.hpp>
  21 #  include <boost/preprocessor/enum_params.hpp>
  22 #  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
  23
  24 namespace boost { namespace python { namespace detail {
  25
  26 // Defines a family of overloaded function which, given x, a function
  27 // pointer, member [function] pointer, or an AdaptableFunction object,
  28 // returns a pointer to type<R>*, where R is the result type of
  29 // invoking the result of bind(x).
  30 //
  31 // In order to work around bugs in deficient compilers, if x might be
  32 // an AdaptableFunction object, you must pass OL as a second argument
  33 // to get this to work portably.
  34
  35 #  define BOOST_PP_ITERATION_PARAMS_1                                                                   \
  36     (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>, BOOST_PYTHON_FUNCTION_POINTER))
  37 #  include BOOST_PP_ITERATE()
  38
  39 #  define BOOST_PP_ITERATION_PARAMS_1                                                                     \
  40     (4, (0, BOOST_PYTHON_CV_COUNT - 1, <boost/python/detail/result.hpp>, BOOST_PYTHON_POINTER_TO_MEMBER))
  41 #  include BOOST_PP_ITERATE()
  42
  43 template <class R, class T>
  44 boost::type<R>* result(R (T::*), int = 0) { return 0; }
  45
  46 #  if (defined(__MWERKS__) && __MWERKS__ < 0x3000)
  47 // This code actually works on all implementations, but why use it when we don't have to?
  48 template <class T>
  49 struct get_result_type
  50 {
  51     typedef boost::type<typename T::result_type> type;
  52 };
  53
  54 struct void_type
  55 {
  56     typedef void type;
  57 };
  58
  59 template <class T>
  60 struct result_result
  61 {
  62     typedef typename mpl::if_c<
  63         is_class<T>::value
  64         , get_result_type<T>
  65         , void_type
  66         >::type t1;
  67
  68     typedef typename t1::type* type;
  69 };
  70
  71 template <class X>
  72 typename result_result<X>::type
  73 result(X const&, short) { return 0; }
  74
  75 #  else // Simpler code for more-capable compilers
  76 template <class X>
  77 boost::type<typename X::result_type>*
  78 result(X const&, short = 0) { return 0; }
  79
  80 #  endif
  81
  82 }}} // namespace boost::python::detail
  83
  84 # endif // RESULT_DWA2002521_HPP
  85
  86 /* --------------- function pointers --------------- */
  87 // For gcc 4.4 compatability, we must include the
  88 // BOOST_PP_ITERATION_DEPTH test inside an #else clause.
  89 #else // BOOST_PP_IS_ITERATING
  90 #if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_FUNCTION_POINTER
  91 # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
  92         && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
  93 #  line BOOST_PP_LINE(__LINE__, result.hpp(function pointers))
  94 # endif
  95
  96 # define N BOOST_PP_ITERATION()
  97
  98 template <class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
  99 boost::type<R>* result(R (*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)), int = 0)
 100 {
 101     return 0;
 102 }
 103
 104 # undef N
 105
 106 /* --------------- pointers-to-members --------------- */
 107 #elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_POINTER_TO_MEMBER
 108 // Outer over cv-qualifiers
 109
 110 # define BOOST_PP_ITERATION_PARAMS_2 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>))
 111 # include BOOST_PP_ITERATE()
 112
 113 #elif BOOST_PP_ITERATION_DEPTH() == 2
 114 # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
 115         && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
 116 #  line BOOST_PP_LINE(__LINE__, result.hpp(pointers-to-members))
 117 # endif
 118 // Inner over arities
 119
 120 # define N BOOST_PP_ITERATION()
 121 # define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_RELATIVE_ITERATION(1))
 122
 123 template <class R, class T BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
 124 boost::type<R>* result(R (T::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)) Q, int = 0)
 125 {
 126     return 0;
 127 }
 128
 129 # undef N
 130 # undef Q
 131
 132 #endif // BOOST_PP_ITERATION_DEPTH()
 133 #endif