source: NonGTP/Boost/boost/python/detail/invoke.hpp @ 857

Revision 857, 3.7 KB checked in by igarcia, 19 years ago (diff)
Line 
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# ifndef INVOKE_DWA20021122_HPP
8#  define INVOKE_DWA20021122_HPP
9
10#  include <boost/python/detail/prefix.hpp>
11#  include <boost/python/detail/preprocessor.hpp>
12#  include <boost/python/detail/none.hpp>
13
14#  include <boost/type_traits/is_member_function_pointer.hpp>
15
16#  include <boost/preprocessor/iterate.hpp>
17#  include <boost/preprocessor/facilities/intercept.hpp>
18#  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
19#  include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
20#  include <boost/preprocessor/repetition/enum_binary_params.hpp>
21#  include <boost/python/to_python_value.hpp>
22
23// This file declares a series of overloaded invoke(...)  functions,
24// used to invoke wrapped C++ function (object)s from Python. Each one
25// accepts:
26//
27//   - a tag which identifies the invocation syntax (e.g. member
28//   functions must be invoked with a different syntax from regular
29//   functions)
30//
31//   - a pointer to a result converter type, used solely as a way of
32//   transmitting the type of the result converter to the function (or
33//   an int, if the return type is void).
34//
35//   - the "function", which may be a function object, a function or
36//   member function pointer, or a defaulted_virtual_fn.
37//
38//   - The arg_from_python converters for each of the arguments to be
39//   passed to the function being invoked.
40
41namespace boost { namespace python { namespace detail {
42
43// This "result converter" is really just used as a dispatch tag to
44// invoke(...), selecting the appropriate implementation
45typedef int void_result_to_python;
46
47template <bool void_return, bool member>
48struct invoke_tag_ {};
49
50// A metafunction returning the appropriate tag type for invoking an
51// object of type F with return type R.
52template <class R, class F>
53struct invoke_tag
54  : invoke_tag_<
55        is_same<R,void>::value
56      , is_member_function_pointer<F>::value
57    >
58{
59};
60
61#  define BOOST_PP_ITERATION_PARAMS_1                                            \
62        (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>))
63#  include BOOST_PP_ITERATE()
64
65}}} // namespace boost::python::detail
66
67# endif // INVOKE_DWA20021122_HPP
68#else
69
70# define N BOOST_PP_ITERATION()
71
72template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
73inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
74{
75    return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ));
76}
77                 
78template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
79inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
80{
81    f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) );
82    return none();
83}
84
85template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
86inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
87{
88    return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) );
89}
90                 
91template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
92inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
93{
94    (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT));
95    return none();
96}
97
98# undef N
99
100#endif // BOOST_PP_IS_ITERATING
Note: See TracBrowser for help on using the repository browser.