// Copyright David Abrahams 2002.

 // Distributed under the Boost Software License, Version 1.0. (See

 // accompanying file LICENSE_1_0.txt or copy at

 // http://www.boost.org/LICENSE_1_0.txt)

 #ifndef DEF_DWA200292_HPP

 # define DEF_DWA200292_HPP

 # include <boost/python/detail/prefix.hpp>

 # include <boost/python/object_fwd.hpp>

 # include <boost/python/make_function.hpp>

 # include <boost/python/detail/def_helper.hpp>

 # include <boost/python/detail/overloads_fwd.hpp>

 # include <boost/python/scope.hpp>

 # include <boost/python/signature.hpp>

 # include <boost/python/detail/scope.hpp>

 namespace boost { namespace python {

 namespace detail

 {

   namespace error

   {

     // Compile-time error messages

     template <bool> struct multiple_functions_passed_to_def;

     template <> struct multiple_functions_passed_to_def<false> { typedef char type; };

   }

   //

   // def_from_helper --

   //

   // Use a def_helper to define a regular wrapped function in the current scope.

   template <class F, class Helper>

   void def_from_helper(

       char const* name, F const& fn, Helper const& helper)

   {

       // Must not try to use default implementations except with method definitions.

       typedef typename error::multiple_functions_passed_to_def<

           Helper::has_default_implementation

           >::type assertion;

       detail::scope_setattr_doc(

           name, boost::python::make_function(

               fn

               , helper.policies()

               , helper.keywords())

           , helper.doc()

           );

   }

   //

   // 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.

   //

   template <class Fn, class A1>

   void

   def_maybe_overloads(

       char const* name

       , Fn fn

       , A1 const& a1

       , ...)

   {

       detail::def_from_helper(name, fn, def_helper<A1>(a1));

   }

   template <class StubsT, class SigT>

   void def_maybe_overloads(

       char const* name

       , SigT sig

       , StubsT const& stubs

       , detail::overloads_base const*)

   {

       scope current;

       detail::define_with_defaults(

           name, stubs, current, detail::get_signature(sig));

   }

   template <class T>

   object make_function1(T fn, ...) { return make_function(fn); }

   inline

   object make_function1(object const& x, object const*) { return x; }

 }

 template <class Fn>

 void def(char const* name, Fn fn)

 {

     detail::scope_setattr_doc(name, detail::make_function1(fn, &fn), 0);

 }

 template <class Arg1T, class Arg2T>

 void def(char const* name, Arg1T arg1, Arg2T const& arg2)

 {

     detail::def_maybe_overloads(name, arg1, arg2, &arg2);

 }

 template <class F, class A1, class A2>

 void def(char const* name, F f, A1 const& a1, A2 const& a2)

 {

     detail::def_from_helper(name, f, detail::def_helper<A1,A2>(a1,a2));

 }

 template <class F, class A1, class A2, class A3>

 void def(char const* name, F f, A1 const& a1, A2 const& a2, A3 const& a3)

 {

     detail::def_from_helper(name, f, detail::def_helper<A1,A2,A3>(a1,a2,a3));

 }

 }} // namespace boost::python

 #endif // DEF_DWA200292_HPP