Added boost header

test/external/boost/python/object/make_instance.hpp

@@ -0,0 +1,78 @@
+// 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 MAKE_INSTANCE_DWA200296_HPP
+# define MAKE_INSTANCE_DWA200296_HPP
+
+# include <boost/python/detail/prefix.hpp>
+# include <boost/python/object/instance.hpp>
+# include <boost/python/converter/registered.hpp>
+# include <boost/python/detail/decref_guard.hpp>
+# include <boost/python/detail/none.hpp>
+# include <boost/mpl/assert.hpp>
+# include <boost/mpl/or.hpp>
+# include <boost/type_traits/is_union.hpp>
+
+namespace boost { namespace python { namespace objects { 
+
+template <class T, class Holder, class Derived>
+struct make_instance_impl
+{
+    typedef objects::instance<Holder> instance_t;
+        
+    template <class Arg>
+    static inline PyObject* execute(Arg& x)
+    {
+        BOOST_MPL_ASSERT((mpl::or_<is_class<T>, is_union<T> >));
+
+        PyTypeObject* type = Derived::get_class_object(x);
+
+        if (type == 0)
+            return python::detail::none();
+
+        PyObject* raw_result = type->tp_alloc(
+            type, objects::additional_instance_size<Holder>::value);
+          
+        if (raw_result != 0)
+        {
+            python::detail::decref_guard protect(raw_result);
+            
+            instance_t* instance = (instance_t*)raw_result;
+            
+            // construct the new C++ object and install the pointer
+            // in the Python object.
+            Derived::construct(&instance->storage, (PyObject*)instance, x)->install(raw_result);
+              
+            // Note the position of the internally-stored Holder,
+            // for the sake of destruction
+            Py_SIZE(instance) = offsetof(instance_t, storage);
+
+            // Release ownership of the python object
+            protect.cancel();
+        }
+        return raw_result;
+    }
+};
+    
+
+template <class T, class Holder>
+struct make_instance
+    : make_instance_impl<T, Holder, make_instance<T,Holder> >
+{
+    template <class U>
+    static inline PyTypeObject* get_class_object(U&)
+    {
+        return converter::registered<T>::converters.get_class_object();
+    }
+    
+    static inline Holder* construct(void* storage, PyObject* instance, reference_wrapper<T const> x)
+    {
+        return new (storage) Holder(instance, x);
+    }
+};
+  
+
+}}} // namespace boost::python::object
+
+#endif // MAKE_INSTANCE_DWA200296_HPP