253 lines
7.4 KiB
C++
253 lines
7.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright David Abrahams 2002, Joel de Guzman, 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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//
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///////////////////////////////////////////////////////////////////////////////
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#if !defined(BOOST_PP_IS_ITERATING)
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# ifndef SIGNATURE_JDG20020813_HPP
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# define SIGNATURE_JDG20020813_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/mpl/if.hpp>
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# include <boost/type_traits/is_convertible.hpp>
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# include <boost/python/detail/preprocessor.hpp>
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# include <boost/preprocessor/repeat.hpp>
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# include <boost/preprocessor/enum.hpp>
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# include <boost/preprocessor/enum_params.hpp>
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# include <boost/preprocessor/empty.hpp>
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# include <boost/preprocessor/arithmetic/sub.hpp>
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# include <boost/preprocessor/iterate.hpp>
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# include <boost/python/detail/type_list.hpp>
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# include <boost/preprocessor/debug/line.hpp>
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# include <boost/preprocessor/arithmetic/sub.hpp>
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# include <boost/preprocessor/arithmetic/inc.hpp>
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# include <boost/preprocessor/repetition/enum_trailing_params.hpp>
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# define BOOST_PYTHON_LIST_INC(n) \
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BOOST_PP_CAT(mpl::vector, BOOST_PP_INC(n))
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace python { namespace detail {
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// A metafunction returning C1 if C1 is derived from C2, and C2
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// otherwise
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template <class C1, class C2>
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struct most_derived
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{
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typedef typename mpl::if_<
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is_convertible<C1*,C2*>
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, C1
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, C2
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>::type type;
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};
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// The following macros generate expansions for::
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//
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// template <class RT, class T0... class TN>
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// inline mpl::vector<RT, T0...TN>
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// get_signature(RT(BOOST_PYTHON_FN_CC *)(T0...TN), void* = 0)
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// {
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// return mpl::list<RT, T0...TN>();
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// }
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//
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// where BOOST_PYTHON_FN_CC is a calling convention keyword, can be
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//
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// empty, for default calling convention
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// __cdecl (if BOOST_PYTHON_ENABLE_CDECL is defined)
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// __stdcall (if BOOST_PYTHON_ENABLE_STDCALL is defined)
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// __fastcall (if BOOST_PYTHON_ENABLE_FASTCALL is defined)
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//
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// And, for an appropriate assortment of cv-qualifications::
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//
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// template <class RT, class ClassT, class T0... class TN>
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// inline mpl::vector<RT, ClassT&, T0...TN>
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// get_signature(RT(BOOST_PYTHON_FN_CC ClassT::*)(T0...TN) cv))
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// {
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// return mpl::list<RT, ClassT&, T0...TN>();
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// }
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//
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// template <class Target, class RT, class ClassT, class T0... class TN>
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// inline mpl::vector<
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// RT
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// , typename most_derived<Target, ClassT>::type&
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// , T0...TN
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// >
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// get_signature(RT(BOOST_PYTHON_FN_CC ClassT::*)(T0...TN) cv), Target*)
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// {
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// return mpl::list<RT, ClassT&, T0...TN>();
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// }
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//
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// There are two forms for invoking get_signature::
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//
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// get_signature(f)
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//
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// and ::
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//
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// get_signature(f,(Target*)0)
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//
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// These functions extract the return type, class (for member
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// functions) and arguments of the input signature and stuff them in
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// an mpl type sequence (the calling convention is dropped).
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// Note that cv-qualification is dropped from
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// the "hidden this" argument of member functions; that is a
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// necessary sacrifice to ensure that an lvalue from_python converter
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// is used. A pointer is not used so that None will be rejected for
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// overload resolution.
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//
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// The second form of get_signature essentially downcasts the "hidden
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// this" argument of member functions to Target, because the function
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// may actually be a member of a base class which is not wrapped, and
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// in that case conversion from python would fail.
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//
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// @group {
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// 'default' calling convention
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# define BOOST_PYTHON_FN_CC
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
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# include BOOST_PP_ITERATE()
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# undef BOOST_PYTHON_FN_CC
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// __cdecl calling convention
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# if defined(BOOST_PYTHON_ENABLE_CDECL)
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# define BOOST_PYTHON_FN_CC __cdecl
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# define BOOST_PYTHON_FN_CC_IS_CDECL
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
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# include BOOST_PP_ITERATE()
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# undef BOOST_PYTHON_FN_CC
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# undef BOOST_PYTHON_FN_CC_IS_CDECL
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# endif // defined(BOOST_PYTHON_ENABLE_CDECL)
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// __stdcall calling convention
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# if defined(BOOST_PYTHON_ENABLE_STDCALL)
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# define BOOST_PYTHON_FN_CC __stdcall
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
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# include BOOST_PP_ITERATE()
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# undef BOOST_PYTHON_FN_CC
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# endif // defined(BOOST_PYTHON_ENABLE_STDCALL)
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// __fastcall calling convention
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# if defined(BOOST_PYTHON_ENABLE_FASTCALL)
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# define BOOST_PYTHON_FN_CC __fastcall
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
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# include BOOST_PP_ITERATE()
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# undef BOOST_PYTHON_FN_CC
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# endif // defined(BOOST_PYTHON_ENABLE_FASTCALL)
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# undef BOOST_PYTHON_LIST_INC
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// }
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}}} // namespace boost::python::detail
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# endif // SIGNATURE_JDG20020813_HPP
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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 // defined(BOOST_PP_IS_ITERATING)
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# define N BOOST_PP_ITERATION()
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// as 'get_signature(RT(*)(T0...TN), void* = 0)' is the same
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// function as 'get_signature(RT(__cdecl *)(T0...TN), void* = 0)',
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// we don't define it twice
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# if !defined(BOOST_PYTHON_FN_CC_IS_CDECL)
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template <
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class RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
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inline BOOST_PYTHON_LIST_INC(N)<
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RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
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get_signature(RT(BOOST_PYTHON_FN_CC *)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)), void* = 0)
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{
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return BOOST_PYTHON_LIST_INC(N)<
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RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
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>();
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}
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# endif // !defined(BOOST_PYTHON_FN_CC_IS_CDECL)
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# undef N
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# define BOOST_PP_ITERATION_PARAMS_2 \
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(3, (0, 3, <boost/python/signature.hpp>))
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# include BOOST_PP_ITERATE()
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#else
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# define N BOOST_PP_RELATIVE_ITERATION(1)
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# define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_ITERATION())
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template <
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class RT, class ClassT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
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inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
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RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
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get_signature(RT(BOOST_PYTHON_FN_CC ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q)
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{
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return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
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RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
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>();
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}
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template <
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class Target
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, class RT
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, class ClassT
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BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)
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>
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inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
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RT
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, typename most_derived<Target, ClassT>::type&
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BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
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>
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get_signature(
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RT(BOOST_PYTHON_FN_CC ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q
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, Target*
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)
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{
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return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
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RT
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, BOOST_DEDUCED_TYPENAME most_derived<Target, ClassT>::type&
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BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
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>();
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}
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# undef Q
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# undef N
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#endif // BOOST_PP_ITERATION_DEPTH()
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#endif // !defined(BOOST_PP_IS_ITERATING)
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