python/include/boost/python/detail/invoke.hpp at python · boostorg/python · GitHub

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#if !defined(BOOST_PP_IS_ITERATING)

// Copyright David Abrahams 2002.

// Distributed under the Boost Software License, Version 1.0. (See

// accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

# ifndef INVOKE_DWA20021122_HPP

# define INVOKE_DWA20021122_HPP

# include <boost/python/detail/prefix.hpp>

# include <boost/python/detail/preprocessor.hpp>

# include <boost/python/detail/none.hpp>

# include <boost/preprocessor/iterate.hpp>

# include <boost/preprocessor/facilities/intercept.hpp>

# include <boost/preprocessor/repetition/enum_trailing_params.hpp>

# include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>

# include <boost/preprocessor/repetition/enum_binary_params.hpp>

# include <boost/python/to_python_value.hpp>

// This file declares a series of overloaded invoke(...) functions,

// used to invoke wrapped C++ function (object)s from Python. Each one

// accepts:

// - a tag which identifies the invocation syntax (e.g. member

// functions must be invoked with a different syntax from regular

// functions)

// - a pointer to a result converter type, used solely as a way of

// transmitting the type of the result converter to the function (or

// an int, if the return type is void).

// - the "function", which may be a function object, a function or

// member function pointer, or a defaulted_virtual_fn.

// - The arg_from_python converters for each of the arguments to be

// passed to the function being invoked.

namespace boost { namespace python { namespace detail {

// This "result converter" is really just used as a dispatch tag to

// invoke(...), selecting the appropriate implementation

typedef int void_result_to_python;

template <bool void_return, bool member>

struct invoke_tag_ {};

// A metafunction returning the appropriate tag type for invoking an

// object of type F with return type R.

template <class R, class F>

struct invoke_tag

: invoke_tag_<

is_same<R,void>::value

, is_member_function_pointer<F>::value

{

};

# define BOOST_PP_ITERATION_PARAMS_1 \

(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>))

# include BOOST_PP_ITERATE()

}}} // namespace boost::python::detail

# endif // INVOKE_DWA20021122_HPP

#else

# define N BOOST_PP_ITERATION()

template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>

inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )

{

return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ));

}

template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>

inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )

{

f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) );

return none();

}

template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>

inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )

{

return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) );

}

template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>

inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )

{

(tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT));

return none();

}

# undef N

#endif // BOOST_PP_IS_ITERATING

python/include/boost/python/detail/invoke.hpp at python · boostorg/python · GitHub

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