134 lines
4.2 KiB
C++
134 lines
4.2 KiB
C++
#if !defined(BOOST_PP_IS_ITERATING)
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// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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# ifndef RESULT_DWA2002521_HPP
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# define RESULT_DWA2002521_HPP
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# include <boost/type.hpp>
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# include <boost/python/detail/preprocessor.hpp>
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# include <boost/type_traits/object_traits.hpp>
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# include <boost/mpl/if.hpp>
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# include <boost/preprocessor/comma_if.hpp>
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# include <boost/preprocessor/iterate.hpp>
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# include <boost/preprocessor/debug/line.hpp>
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# include <boost/preprocessor/enum_params.hpp>
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# include <boost/preprocessor/repetition/enum_trailing_params.hpp>
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namespace boost { namespace python { namespace detail {
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// Defines a family of overloaded function which, given x, a function
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// pointer, member [function] pointer, or an AdaptableFunction object,
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// returns a pointer to type<R>*, where R is the result type of
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// invoking the result of bind(x).
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//
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// In order to work around bugs in deficient compilers, if x might be
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// an AdaptableFunction object, you must pass OL as a second argument
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// to get this to work portably.
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>, BOOST_PYTHON_FUNCTION_POINTER))
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# include BOOST_PP_ITERATE()
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(4, (0, BOOST_PYTHON_CV_COUNT - 1, <boost/python/detail/result.hpp>, BOOST_PYTHON_POINTER_TO_MEMBER))
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# include BOOST_PP_ITERATE()
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template <class R, class T>
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boost::type<R>* result(R (T::*), int = 0) { return 0; }
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# if (defined(__MWERKS__) && __MWERKS__ < 0x3000)
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// This code actually works on all implementations, but why use it when we don't have to?
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template <class T>
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struct get_result_type
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{
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typedef boost::type<typename T::result_type> type;
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};
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struct void_type
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{
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typedef void type;
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};
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template <class T>
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struct result_result
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{
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typedef typename mpl::if_c<
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is_class<T>::value
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, get_result_type<T>
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, void_type
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>::type t1;
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typedef typename t1::type* type;
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};
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template <class X>
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typename result_result<X>::type
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result(X const&, short) { return 0; }
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# else // Simpler code for more-capable compilers
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template <class X>
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boost::type<typename X::result_type>*
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result(X const&, short = 0) { return 0; }
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# endif
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}}} // namespace boost::python::detail
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# endif // RESULT_DWA2002521_HPP
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/* --------------- function pointers --------------- */
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// For gcc 4.4 compatability, we must include the
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// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
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#else // BOOST_PP_IS_ITERATING
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#if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_FUNCTION_POINTER
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# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
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&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
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# line BOOST_PP_LINE(__LINE__, result.hpp(function pointers))
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# endif
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# define N BOOST_PP_ITERATION()
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template <class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
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boost::type<R>* result(R (*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)), int = 0)
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{
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return 0;
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}
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# undef N
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/* --------------- pointers-to-members --------------- */
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#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_POINTER_TO_MEMBER
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// Outer over cv-qualifiers
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# define BOOST_PP_ITERATION_PARAMS_2 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>))
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# include BOOST_PP_ITERATE()
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#elif BOOST_PP_ITERATION_DEPTH() == 2
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# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
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&& BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
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# line BOOST_PP_LINE(__LINE__, result.hpp(pointers-to-members))
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# endif
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// Inner over arities
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# define N BOOST_PP_ITERATION()
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# define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_RELATIVE_ITERATION(1))
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template <class R, class T BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)>
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boost::type<R>* result(R (T::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)) Q, int = 0)
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{
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return 0;
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}
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# undef N
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# undef Q
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#endif // BOOST_PP_ITERATION_DEPTH()
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#endif
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