sl@0: ///////////////////////////////////////////////////////////////////////////////
sl@0: //
sl@0: // Copyright David Abrahams 2002, Joel de Guzman, 2002.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See
sl@0: // accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: //
sl@0: ///////////////////////////////////////////////////////////////////////////////
sl@0: #if !defined(BOOST_PP_IS_ITERATING)
sl@0: 
sl@0: # ifndef SIGNATURE_JDG20020813_HPP
sl@0: #  define SIGNATURE_JDG20020813_HPP
sl@0: 
sl@0: # include <boost/python/detail/prefix.hpp>
sl@0: 
sl@0: # include <boost/mpl/if.hpp>
sl@0: # include <boost/type_traits/is_convertible.hpp>
sl@0: 
sl@0: #  include <boost/python/detail/preprocessor.hpp>
sl@0: #  include <boost/preprocessor/repeat.hpp>
sl@0: #  include <boost/preprocessor/enum.hpp>
sl@0: #  include <boost/preprocessor/enum_params.hpp>
sl@0: #  include <boost/preprocessor/empty.hpp>
sl@0: #  include <boost/preprocessor/arithmetic/sub.hpp>
sl@0: #  include <boost/preprocessor/iterate.hpp>
sl@0: #  include <boost/python/detail/type_list.hpp>
sl@0: 
sl@0: #  include <boost/preprocessor/debug/line.hpp>
sl@0: #  include <boost/preprocessor/arithmetic/sub.hpp>
sl@0: #  include <boost/preprocessor/arithmetic/inc.hpp>
sl@0: #  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
sl@0: 
sl@0: # define BOOST_PYTHON_LIST_INC(n)        \
sl@0:    BOOST_PP_CAT(mpl::vector, BOOST_PP_INC(n))
sl@0: 
sl@0: ///////////////////////////////////////////////////////////////////////////////
sl@0: namespace boost { namespace python { namespace detail {
sl@0: 
sl@0: // A metafunction returning C1 if C1 is derived from C2, and C2
sl@0: // otherwise
sl@0: template <class C1, class C2>
sl@0: struct most_derived
sl@0: {
sl@0:     typedef typename mpl::if_<
sl@0:         is_convertible<C1*,C2*>
sl@0:       , C1
sl@0:       , C2
sl@0:     >::type type;
sl@0: };
sl@0: 
sl@0: //  The following macros generate expansions for::
sl@0: //
sl@0: //      template <class RT, class T0... class TN>
sl@0: //      inline mpl::vector<RT, T0...TN>
sl@0: //      get_signature(RT(*)(T0...TN), void* = 0)
sl@0: //      {
sl@0: //          return mpl::list<RT, T0...TN>();
sl@0: //      }
sl@0: //
sl@0: //   And, for an appropriate assortment of cv-qualifications::
sl@0: //
sl@0: //      template <class RT, class ClassT, class T0... class TN>
sl@0: //      inline mpl::vector<RT, ClassT&, T0...TN>
sl@0: //      get_signature(RT(ClassT::*)(T0...TN) cv))
sl@0: //      {
sl@0: //          return mpl::list<RT, ClassT&, T0...TN>();
sl@0: //      }
sl@0: //
sl@0: //      template <class Target, class RT, class ClassT, class T0... class TN>
sl@0: //      inline mpl::vector<
sl@0: //          RT
sl@0: //        , typename most_derived<Target, ClassT>::type&
sl@0: //        , T0...TN
sl@0: //      >
sl@0: //      get_signature(RT(ClassT::*)(T0...TN) cv), Target*)
sl@0: //      {
sl@0: //          return mpl::list<RT, ClassT&, T0...TN>();
sl@0: //      }
sl@0: //
sl@0: //  There are two forms for invoking get_signature::
sl@0: //
sl@0: //      get_signature(f)
sl@0: //
sl@0: //  and ::
sl@0: //
sl@0: //      get_signature(f,(Target*)0)
sl@0: //
sl@0: //  These functions extract the return type, class (for member
sl@0: //  functions) and arguments of the input signature and stuff them in
sl@0: //  an mpl type sequence.  Note that cv-qualification is dropped from
sl@0: //  the "hidden this" argument of member functions; that is a
sl@0: //  necessary sacrifice to ensure that an lvalue from_python converter
sl@0: //  is used.  A pointer is not used so that None will be rejected for
sl@0: //  overload resolution.
sl@0: //
sl@0: //  The second form of get_signature essentially downcasts the "hidden
sl@0: //  this" argument of member functions to Target, because the function
sl@0: //  may actually be a member of a base class which is not wrapped, and
sl@0: //  in that case conversion from python would fail.
sl@0: //
sl@0: // @group {
sl@0: 
sl@0: #  define BOOST_PP_ITERATION_PARAMS_1                                   \
sl@0:     (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
sl@0: 
sl@0: #  include BOOST_PP_ITERATE()
sl@0: #  undef BOOST_PYTHON_LIST_INC
sl@0: 
sl@0: // }
sl@0: 
sl@0: }}} // namespace boost::python::detail
sl@0: 
sl@0: 
sl@0: # endif // SIGNATURE_JDG20020813_HPP
sl@0: 
sl@0: #elif BOOST_PP_ITERATION_DEPTH() == 1 // defined(BOOST_PP_IS_ITERATING)
sl@0: 
sl@0: # define N BOOST_PP_ITERATION()
sl@0: 
sl@0: template <
sl@0:     class RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
sl@0: inline BOOST_PYTHON_LIST_INC(N)<
sl@0:     RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
sl@0: get_signature(RT(*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)), void* = 0)
sl@0: {
sl@0:     return BOOST_PYTHON_LIST_INC(N)<
sl@0:             RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
sl@0:         >();
sl@0: }
sl@0: 
sl@0: # undef N
sl@0: 
sl@0: # define BOOST_PP_ITERATION_PARAMS_2 \
sl@0:     (3, (0, 3, <boost/python/signature.hpp>))
sl@0: # include BOOST_PP_ITERATE()
sl@0: 
sl@0: #else
sl@0: 
sl@0: # define N BOOST_PP_RELATIVE_ITERATION(1)
sl@0: # define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_ITERATION())
sl@0: 
sl@0: template <
sl@0:     class RT, class ClassT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
sl@0: inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
sl@0:     RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
sl@0: get_signature(RT(ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q)
sl@0: {
sl@0:     return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
sl@0:             RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
sl@0:         >();
sl@0: }
sl@0: 
sl@0: template <
sl@0:     class Target
sl@0:   , class RT
sl@0:   , class ClassT
sl@0:     BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)
sl@0: >
sl@0: inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
sl@0:     RT
sl@0:   , typename most_derived<Target, ClassT>::type&
sl@0:     BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
sl@0: >
sl@0: get_signature(
sl@0:     RT(ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q
sl@0:   , Target*
sl@0: )
sl@0: {
sl@0:     return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
sl@0:         RT
sl@0:       , BOOST_DEDUCED_TYPENAME most_derived<Target, ClassT>::type&
sl@0:         BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
sl@0:     >();
sl@0: }
sl@0: 
sl@0: # undef Q
sl@0: # undef N
sl@0: 
sl@0: #endif // !defined(BOOST_PP_IS_ITERATING)