[Boost-users] [serialization] How to pass user defined flags?

When loading an object via serialization I need to be able to load the object in different modes (which has nothing to do with its data). I tried making an ext_xml_wiarchive (inheriting xml_wiarchive) that adds a function to retrieve the mode, but the serialization template functions do not seem to be able to access that function. I know I'm missing something here... :( /R