class.hpp

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        base::add_property(name, this->make_getter(fget));
        return *this;
    }

    template <class Get, class Set>
    self& add_property(char const* name, Get fget, Set fset)
    {
        base::add_property(name, this->make_getter(fget), this->make_setter(fset));
        return *this;
    }
        
    template <class Get>
    self& add_static_property(char const* name, Get fget)
    {
        base::add_static_property(name, object(fget));
        return *this;
    }

    template <class Get, class Set>
    self& add_static_property(char const* name, Get fget, Set fset)
    {
        base::add_static_property(name, object(fget), object(fset));
        return *this;
    }
        
    template <class U>
    self& setattr(char const* name, U const& x)
    {
        this->base::setattr(name, object(x));
        return *this;
    }

    // Pickle support
    template <typename PickleSuiteType>
    self& def_pickle(PickleSuiteType const& x)
    {
      error_messages::must_be_derived_from_pickle_suite(x);
      detail::pickle_suite_finalize<PickleSuiteType>::register_(
        *this,
        &PickleSuiteType::getinitargs,
        &PickleSuiteType::getstate,
        &PickleSuiteType::setstate,
        PickleSuiteType::getstate_manages_dict());
      return *this;
    }

    self& enable_pickling()
    {
        this->base::enable_pickling_(false);
        return *this;
    }

    self& staticmethod(char const* name)
    {
        this->make_method_static(name);
        return *this;
    }
 private: // helper functions

    // Builds a method for this class around the given [member]
    // function pointer or object, appropriately adjusting the type of
    // the first signature argument so that if f is a member of a
    // (possibly not wrapped) base class of T, an lvalue argument of
    // type T will be required.
    //
    // @group PropertyHelpers {
    template <class F>
    object make_getter(F f)
    {
        typedef typename api::is_object_operators<F>::type is_obj_or_proxy;
        
        return this->make_fn_impl(
            detail::unwrap_wrapper((W*)0)
          , f, is_obj_or_proxy(), (char*)0, detail::is_data_member_pointer<F>()
        );
    }
    
    template <class F>
    object make_setter(F f)
    {
        typedef typename api::is_object_operators<F>::type is_obj_or_proxy;
        
        return this->make_fn_impl(
            detail::unwrap_wrapper((W*)0)
          , f, is_obj_or_proxy(), (int*)0, detail::is_data_member_pointer<F>()
        );
    }
    
    template <class T, class F>
    object make_fn_impl(T*, F const& f, mpl::false_, void*, mpl::false_)
    {
        return python::make_function(f, default_call_policies(), detail::get_signature(f, (T*)0));
    }

    template <class T, class D, class B>
    object make_fn_impl(T*, D B::*pm_, mpl::false_, char*, mpl::true_)
    {
        D T::*pm = pm_;
        return python::make_getter(pm);
    }

    template <class T, class D, class B>
    object make_fn_impl(T*, D B::*pm_, mpl::false_, int*, mpl::true_)
    {
        D T::*pm = pm_;
        return python::make_setter(pm);
    }

    template <class T, class F>
    object make_fn_impl(T*, F const& x, mpl::true_, void*, mpl::false_)
    {
        return x;
    }
    // }
    
    template <class D, class B>
    self& def_readonly_impl(
        char const* name, D B::*pm_ BOOST_PYTHON_YES_DATA_MEMBER)
    {
        return this->add_property(name, pm_);
    }

    template <class D, class B>
    self& def_readwrite_impl(
        char const* name, D B::*pm_ BOOST_PYTHON_YES_DATA_MEMBER)
    {
        return this->add_property(name, pm_, pm_);
    }

    template <class D>
    self& def_readonly_impl(
        char const* name, D& d BOOST_PYTHON_NO_DATA_MEMBER)
    {
        return this->add_static_property(name, python::make_getter(d));
    }

    template <class D>
    self& def_readwrite_impl(
        char const* name, D& d  BOOST_PYTHON_NO_DATA_MEMBER)
    {
        return this->add_static_property(name, python::make_getter(d), python::make_setter(d));
    }

    template <class DefVisitor>
    inline void initialize(DefVisitor const& i)
    {
        metadata::register_(); // set up runtime metadata/conversions
        
        typedef typename metadata::holder holder;
        this->set_instance_size( objects::additional_instance_size<holder>::value );
        
        this->def(i);
    }
    
    inline void initialize(no_init_t)
    {
        metadata::register_(); // set up runtime metadata/conversions
        this->def_no_init();
    }
    
    //
    // These two overloads discriminate between def() as applied to a
    // generic visitor and everything else.
    //
    // @group def_impl {
    template <class T, class Helper, class LeafVisitor, class Visitor>
    inline void def_impl(
        T*
      , char const* name
      , LeafVisitor
      , Helper const& helper
      , def_visitor<Visitor> const* v
    )
    {
        v->visit(*this, name,  helper);
    }

    template <class T, class Fn, class Helper>
    inline void def_impl(
        T*
      , char const* name
      , Fn fn
      , Helper const& helper
      , ...
    )
    {
        objects::add_to_namespace(
            *this
          , name
          , make_function(
                fn
              , helper.policies()
              , helper.keywords()
              , detail::get_signature(fn, (T*)0)
            )
          , helper.doc()
        );

        this->def_default(name, fn, helper, mpl::bool_<Helper::has_default_implementation>());
    }
    // }

    //
    // These two overloads handle the definition of default
    // implementation overloads for virtual functions. The second one
    // handles the case where no default implementation was specified.
    //
    // @group def_default {
    template <class Fn, class Helper>
    inline void def_default(
        char const* name
        , Fn
        , Helper const& helper
        , mpl::bool_<true>)
    {
        detail::error::virtual_function_default<W,Fn>::must_be_derived_class_member(
            helper.default_implementation());
            
        objects::add_to_namespace(
            *this, name,
            make_function(
                helper.default_implementation(), helper.policies(), helper.keywords())
            );
    }
    
    template <class Fn, class Helper>
    inline void def_default(char const*, Fn, Helper const&, mpl::bool_<false>)
    { }
    // }
    
    //
    // These two overloads discriminate between def() as applied to
    // regular functions and def() as applied to the result of
    // BOOST_PYTHON_FUNCTION_OVERLOADS(). The final argument is used to
    // discriminate.
    //
    // @group def_maybe_overloads {
    template <class OverloadsT, class SigT>
    void def_maybe_overloads(
        char const* name
        , SigT sig
        , OverloadsT const& overloads
        , detail::overloads_base const*)

    {
        //  convert sig to a type_list (see detail::get_signature in signature.hpp)
        //  before calling detail::define_with_defaults.
        detail::define_with_defaults(
            name, overloads, *this, detail::get_signature(sig));
    }

    template <class Fn, class A1>
    void def_maybe_overloads(
        char const* name
        , Fn fn
        , A1 const& a1
        , ...)
    {
        this->def_impl(
            detail::unwrap_wrapper((W*)0)
          , name
          , fn
          , detail::def_helper<A1>(a1)
          , &fn
        );

    }
    // }
};


//
// implementations
//

template <class W, class X1, class X2, class X3>
inline class_<W,X1,X2,X3>::class_(char const* name, char const* doc)
    : base(name, id_vector::size, id_vector().ids, doc)
{
    this->initialize(init<>());
//  select_holder::assert_default_constructible();
}

template <class W, class X1, class X2, class X3>
inline class_<W,X1,X2,X3>::class_(char const* name, no_init_t)
    : base(name, id_vector::size, id_vector().ids)
{
    this->initialize(no_init);
}

template <class W, class X1, class X2, class X3>
inline class_<W,X1,X2,X3>::class_(char const* name, char const* doc, no_init_t)
    : base(name, id_vector::size, id_vector().ids, doc)
{
    this->initialize(no_init);
}

}} // namespace boost::python

# undef BOOST_PYTHON_DATA_MEMBER_HELPER
# undef BOOST_PYTHON_YES_DATA_MEMBER
# undef BOOST_PYTHON_NO_DATA_MEMBER
# undef BOOST_PYTHON_NO_MEMBER_POINTER_ORDERING

#endif // CLASS_DWA200216_HPP