Chris@16: #if !defined(BOOST_PP_IS_ITERATING)
Chris@16: 
Chris@16: // Copyright David Abrahams 2001.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: # ifndef MAKE_HOLDER_DWA20011215_HPP
Chris@16: #  define MAKE_HOLDER_DWA20011215_HPP
Chris@16: 
Chris@16: #  include <boost/python/detail/prefix.hpp>
Chris@16: 
Chris@16: #  include <boost/python/object/instance.hpp>
Chris@16: #  include <boost/python/converter/registry.hpp>
Chris@16: #if !defined( BOOST_PYTHON_NO_PY_SIGNATURES) && defined( BOOST_PYTHON_PY_SIGNATURES_PROPER_INIT_SELF_TYPE)
Chris@16: #  include <boost/python/detail/python_type.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: #  include <boost/python/object/forward.hpp>
Chris@16: #  include <boost/python/detail/preprocessor.hpp>
Chris@16: 
Chris@16: #  include <boost/mpl/next.hpp>
Chris@16: #  include <boost/mpl/begin_end.hpp>
Chris@16: #  include <boost/mpl/deref.hpp>
Chris@16: 
Chris@16: #  include <boost/preprocessor/iterate.hpp>
Chris@16: #  include <boost/preprocessor/iteration/local.hpp>
Chris@16: #  include <boost/preprocessor/repeat.hpp>
Chris@16: #  include <boost/preprocessor/debug/line.hpp>
Chris@16: #  include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
Chris@16: 
Chris@16: #  include <cstddef>
Chris@16: 
Chris@16: namespace boost { namespace python { namespace objects {
Chris@16: 
Chris@16: template <int nargs> struct make_holder;
Chris@16: 
Chris@16: #  define BOOST_PYTHON_DO_FORWARD_ARG(z, index, _) , f##index(a##index)
Chris@16: 
Chris@16: // specializations...
Chris@16: #  define BOOST_PP_ITERATION_PARAMS_1 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/make_holder.hpp>))
Chris@16: #  include BOOST_PP_ITERATE()
Chris@16: 
Chris@16: #  undef BOOST_PYTHON_DO_FORWARD_ARG
Chris@16: 
Chris@16: }}} // namespace boost::python::objects
Chris@16: 
Chris@16: # endif // MAKE_HOLDER_DWA20011215_HPP
Chris@16: 
Chris@16: // For gcc 4.4 compatability, we must include the
Chris@16: // BOOST_PP_ITERATION_DEPTH test inside an #else clause.
Chris@16: #else // BOOST_PP_IS_ITERATING
Chris@16: #if BOOST_PP_ITERATION_DEPTH() == 1
Chris@16: # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
Chris@16:         && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
Chris@16: #  line BOOST_PP_LINE(__LINE__, make_holder.hpp)
Chris@16: # endif 
Chris@16: 
Chris@16: # define N BOOST_PP_ITERATION()
Chris@16: 
Chris@16: template <>
Chris@16: struct make_holder<N>
Chris@16: {
Chris@16:     template <class Holder, class ArgList>
Chris@16:     struct apply
Chris@16:     {
Chris@16: # if N
Chris@16:         // Unrolled iteration through each argument type in ArgList,
Chris@16:         // choosing the type that will be forwarded on to the holder's
Chris@16:         // templated constructor.
Chris@16:         typedef typename mpl::begin<ArgList>::type iter0;
Chris@16:         
Chris@16: #  define BOOST_PP_LOCAL_MACRO(n)               \
Chris@16:     typedef typename mpl::deref<iter##n>::type t##n;        \
Chris@16:     typedef typename forward<t##n>::type f##n;  \
Chris@16:     typedef typename mpl::next<iter##n>::type   \
Chris@16:         BOOST_PP_CAT(iter,BOOST_PP_INC(n)); // Next iterator type
Chris@16:         
Chris@16: #  define BOOST_PP_LOCAL_LIMITS (0, N-1)
Chris@16: #  include BOOST_PP_LOCAL_ITERATE()
Chris@16: # endif 
Chris@16:         
Chris@16:         static void execute(
Chris@16: #if !defined( BOOST_PYTHON_NO_PY_SIGNATURES) && defined( BOOST_PYTHON_PY_SIGNATURES_PROPER_INIT_SELF_TYPE)
Chris@16:             boost::python::detail::python_class<BOOST_DEDUCED_TYPENAME Holder::value_type> *p
Chris@16: #else
Chris@16:             PyObject *p
Chris@16: #endif
Chris@16:             BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, t, a))
Chris@16:         {
Chris@16:             typedef instance<Holder> instance_t;
Chris@16:             
Chris@16:             void* memory = Holder::allocate(p, offsetof(instance_t, storage), sizeof(Holder));
Chris@16:             try {
Chris@16:                 (new (memory) Holder(
Chris@16:                     p BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_DO_FORWARD_ARG, nil)))->install(p);
Chris@16:             }
Chris@16:             catch(...) {
Chris@16:                 Holder::deallocate(p, memory);
Chris@16:                 throw;
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: # undef N
Chris@16: 
Chris@16: #endif // BOOST_PP_ITERATION_DEPTH()
Chris@16: #endif