added 'construct_custodian_for.hpp' (fixes boost::python problem)

vigranumpy/src/core/construct_custodian_for.hpp

@@ -0,0 +1,94 @@
+/************************************************************************/
+/*                                                                      */
+/*                 Copyright 2014 by Ullrich Koethe                     */
+/*                                                                      */
+/*    This file is part of the VIGRA computer vision library.           */
+/*    The VIGRA Website is                                              */
+/*        http://hci.iwr.uni-heidelberg.de/vigra/                       */
+/*    Please direct questions, bug reports, and contributions to        */
+/*        [email protected]    or                    */
+/*        [email protected]                               */
+/*                                                                      */
+/*    Permission is hereby granted, free of charge, to any person       */
+/*    obtaining a copy of this software and associated documentation    */
+/*    files (the "Software"), to deal in the Software without           */
+/*    restriction, including without limitation the rights to use,      */
+/*    copy, modify, merge, publish, distribute, sublicense, and/or      */
+/*    sell copies of the Software, and to permit persons to whom the    */
+/*    Software is furnished to do so, subject to the following          */
+/*    conditions:                                                       */
+/*                                                                      */
+/*    The above copyright notice and this permission notice shall be    */
+/*    included in all copies or substantial portions of the             */
+/*    Software.                                                         */
+/*                                                                      */
+/*    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND    */
+/*    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES   */
+/*    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND          */
+/*    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT       */
+/*    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,      */
+/*    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING      */
+/*    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR     */
+/*    OTHER DEALINGS IN THE SOFTWARE.                                   */
+/*                                                                      */
+/************************************************************************/
+
+#ifndef VIGRA_CONSTRUCT_CUSTODIAN_FOR_HPP
+#define VIGRA_CONSTRUCT_CUSTODIAN_FOR_HPP
+
+#include <boost/version.hpp>
+
+#if BOOST_VERSION <= 105500
+
+#include <boost/python/with_custodian_and_ward.hpp>
+
+namespace boost { namespace python { 
+
+template <std::size_t ward>
+struct construct_custodian_for : default_call_policies
+{
+    BOOST_STATIC_ASSERT(ward > 0);
+
+    template <class ArgumentPackage>
+    static PyObject* postcall(ArgumentPackage const& args_, PyObject* result)
+    {
+        std::size_t arity_ = detail::arity(args_);
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+        if (ward > arity_ )
+#else
+        // check if ward exceeds the arity
+        // (this weird formulation avoids "always false" warnings
+        // for arity_ = 0)
+        if ( (std::max<std::size_t>)(0, ward) > arity_ )
+#endif
+        {
+            PyErr_SetString(
+                PyExc_IndexError
+              , "boost::python::construct_custodian_for: argument index out of range"
+            );
+            return 0;
+        }
+
+        PyObject* patient = detail::get_prev<ward>::execute(args_, result);
+        PyObject* nurse = detail::get_prev<1>::execute(args_.base);
+
+        if (nurse == 0) return 0;
+
+        result = default_call_policies::postcall(args_, result);
+        if (result == 0)
+            return 0;
+
+        if (python::objects::make_nurse_and_patient(nurse, patient) == 0)
+        {
+            Py_XDECREF(result);
+            return 0;
+        }
+        return result;
+    }
+};
+
+}} // namespace boost::python
+
+#  endif // BOOST_VERSION <= 105500
+
+#endif // VIGRA_CONSTRUCT_CUSTODIAN_FOR_HPP