add GetHashCode function to ost::mol::EntityHandle

modules/mol/base/pymod/export_entity.cc

@@ -225,7 +225,8 @@ void export_Entity()
     .def("EditXCS", &EntityHandle::EditXCS, arg("mode")=UNBUFFERED_EDIT)
     .def("EditICS", &EntityHandle::EditICS, arg("mode")=UNBUFFERED_EDIT)
     .def("RequestXCSEditor", &depr_request_xcs_editor, arg("mode")=UNBUFFERED_EDIT)
-    .def("RequestICSEditor", &depr_request_ics_editor, arg("mode")=UNBUFFERED_EDIT)  
+    .def("RequestICSEditor", &depr_request_ics_editor, arg("mode")=UNBUFFERED_EDIT)
+    .def("GetHashCode", &EntityHandle::GetHashCode) 
     .def(self==self)
     .def(self!=self)
 #if OST_NUMPY_SUPPORT_ENABLED

modules/mol/base/src/entity_handle.cc

@@ -388,4 +388,11 @@ EntityHandle EntityHandle::GetHandle() const
 {
   return *this;
 }
+
+unsigned long EntityHandle::GetHashCode() const
+{
+  this->CheckValidity();
+  return reinterpret_cast<unsigned long>(Impl().get());
+}
+
 }} // ns

modules/mol/base/src/entity_handle.hh

@@ -272,6 +272,9 @@ public:
   /// 
   /// Useful for templated code and duck-typing in Python
   EntityHandle GetHandle() const;
+
+  unsigned long GetHashCode() const;
+  
   bool operator==(const EntityHandle& ref) const;
   bool operator!=(const EntityHandle& ref) const;
 };