Patches by Nikolay Mladenov (nickm at sitius com): new pythonic signatures; docstring support for enums; fix unrelated Visual C++ 6 problem

[SVN r39191]

test/pytype_function.cpp

@@ -0,0 +1,85 @@
+// Copyright Joel de Guzman 2004. 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)
+
+#include <boost/python/module.hpp>
+#include <boost/python/def.hpp>
+#include <boost/python/extract.hpp>
+#include <boost/python/to_python_converter.hpp>
+#include <boost/python/class.hpp>
+
+using namespace boost::python;
+
+struct A
+{
+};
+
+struct B
+{
+  A a;
+  B(const A& a_):a(a_){}
+};
+
+// Converter from A to python int
+struct BToPython
+#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
+ : converter::to_python_target_type<A>  //inherits get_pytype 
+#endif
+{
+  static PyObject* convert(const B& b)
+  {
+    return boost::python::incref(boost::python::object(b.a).ptr());
+  }
+};
+
+// Conversion from python int to A
+struct BFromPython 
+{
+  BFromPython()
+  {
+    boost::python::converter::registry::push_back(
+        &convertible,
+        &construct,
+        boost::python::type_id< B >()
+#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
+        , &converter::expected_from_python_type<A>::get_pytype//convertible to A can be converted to B
+#endif
+        );
+  }
+
+  static void* convertible(PyObject* obj_ptr)
+  {
+      extract<const A&> ex(obj_ptr);
+      if (!ex.check()) return 0;
+      return obj_ptr;
+  }
+
+  static void construct(
+      PyObject* obj_ptr,
+      boost::python::converter::rvalue_from_python_stage1_data* data)
+  {
+    void* storage = (
+        (boost::python::converter::rvalue_from_python_storage< B >*)data)-> storage.bytes;
+
+    extract<const A&> ex(obj_ptr);
+    new (storage) B(ex());
+    data->convertible = storage;
+  }
+};
+
+
+B func(const B& b) { return b ; }
+
+
+BOOST_PYTHON_MODULE(pytype_function_ext)
+{
+  to_python_converter< B , BToPython,true >(); //has get_pytype
+  BFromPython();
+
+  class_<A>("A") ;
+
+  def("func", &func);
+
+}
+
+#include "module_tail.cpp"