boost/python/raw_function.hpp

   1 // Copyright David Abrahams 2003.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef RAW_FUNCTION_DWA200336_HPP
   6 # define RAW_FUNCTION_DWA200336_HPP
   7
   8 # include <boost/python/detail/prefix.hpp>
   9
  10 # include <boost/python/tuple.hpp>
  11 # include <boost/python/dict.hpp>
  12 # include <boost/python/object/py_function.hpp>
  13 # include <boost/mpl/vector/vector10.hpp>
  14
  15 # include <boost/limits.hpp>
  16 # include <cstddef>
  17
  18 namespace boost { namespace python {
  19
  20 namespace detail
  21 {
  22   template <class F>
  23   struct raw_dispatcher
  24   {
  25       raw_dispatcher(F f) : f(f) {}
  26
  27       PyObject* operator()(PyObject* args, PyObject* keywords)
  28       {
  29           return incref(
  30               object(
  31                   f(
  32                       tuple(borrowed_reference(args))
  33                     , keywords ? dict(borrowed_reference(keywords)) : dict()
  34                   )
  35               ).ptr()
  36           );
  37       }
  38
  39    private:
  40       F f;
  41   };
  42
  43   object BOOST_PYTHON_DECL make_raw_function(objects::py_function);
  44 }
  45
  46 template <class F>
  47 object raw_function(F f, std::size_t min_args = 0)
  48 {
  49     return detail::make_raw_function(
  50         objects::py_function(
  51             detail::raw_dispatcher<F>(f)
  52           , mpl::vector1<PyObject*>()
  53           , min_args
  54           , (std::numeric_limits<unsigned>::max)()
  55         )
  56     );
  57 }
  58
  59 }} // namespace boost::python
  60
  61 #endif // RAW_FUNCTION_DWA200336_HPP