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252 lines
7.4 KiB
252 lines
7.4 KiB
/////////////////////////////////////////////////////////////////////////////// |
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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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