additional files for pickle support; no modification of any existing files

[SVN r14549]

include/boost/python/object/pickle_support.hpp

@@ -0,0 +1,96 @@
+//  (C) Copyright R.W. Grosse-Kunstleve 2002.
+//  Permission to copy, use, modify, sell and distribute this software
+//  is granted provided this copyright notice appears in all copies. This
+//  software is provided "as is" without express or implied warranty, and
+//  with no claim as to its suitability for any purpose.
+#ifndef BOOST_PYTHON_OBJECT_PICKLE_SUPPORT_RWGK20020603_HPP
+#define BOOST_PYTHON_OBJECT_PICKLE_SUPPORT_RWGK20020603_HPP
+
+#include <boost/python/object/class.hpp>
+#include <boost/python/tuple.hpp>
+
+namespace boost { namespace python {
+
+handle<> make_instance_reduce_function();
+
+namespace error_messages {
+
+  template <class T>
+  struct missing_pickle_support_function_or_incorrect_signature {};
+
+}
+
+class pickle_support_base
+{
+  private:
+    struct dummy_return_type_ {};
+
+  public:
+    template <class Class_, class Tgetinitargs>
+    static
+    void
+    register_(
+      Class_& cl,
+      tuple (*getinitargs_fn)(Tgetinitargs),
+      dummy_return_type_* (*getstate_fn)(),
+      dummy_return_type_* (*setstate_fn)(),
+      bool)
+    {
+      cl.enable_pickle_support(false);
+      cl.def("__getinitargs__", getinitargs_fn);
+    }
+
+    template <class Class_, class Tgetstate, class Tsetstate>
+    static
+    void
+    register_(
+      Class_& cl,
+      dummy_return_type_* (*getinitargs_fn)(),
+      tuple (*getstate_fn)(Tgetstate),
+      void (*setstate_fn)(Tsetstate, object),
+      bool getstate_manages_dict)
+    {
+      cl.enable_pickle_support(getstate_manages_dict);
+      cl.def("__getstate__", getstate_fn);
+      cl.def("__setstate__", setstate_fn);
+    }
+
+    template <class Class_,
+              class Tgetinitargs, class Tgetstate, class Tsetstate>
+    static
+    void
+    register_(
+      Class_& cl,
+      tuple (*getinitargs_fn)(Tgetinitargs),
+      tuple (*getstate_fn)(Tgetstate),
+      void (*setstate_fn)(Tsetstate, object),
+      bool getstate_manages_dict)
+    {
+      cl.enable_pickle_support(getstate_manages_dict);
+      cl.def("__getinitargs__", getinitargs_fn);
+      cl.def("__getstate__", getstate_fn);
+      cl.def("__setstate__", setstate_fn);
+    }
+
+    template <class Class_>
+    static
+    void
+    register_(
+      Class_&,
+      ...)
+    {
+      typedef typename
+        error_messages::missing_pickle_support_function_or_incorrect_signature<
+          Class_>::error_type error_type;
+    }
+
+    static dummy_return_type_* getinitargs() { return 0; }
+    static dummy_return_type_* getstate() { return 0; }
+    static dummy_return_type_* setstate() { return 0; }
+
+    static bool getstate_manages_dict() { return false; }
+};
+
+}} // namespace boost::python
+
+#endif // BOOST_PYTHON_OBJECT_PICKLE_SUPPORT_RWGK20020603_HPP