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rt.cast_

Implementation of array assignment support routines.
Authors:
Walter Bright, Sean Kelly
Object _d_toObject(void* p);
Given a pointer: If it is an Object, return that Object. If it is an interface, return the Object implementing the interface. If it is null, return null. Else, undefined crash
void* _d_interface_cast(void* p, ClassInfo c);
Attempts to cast Object o to class c. Returns o if successful, null if not.
void* _d_interface_vtbl(ClassInfo ic, Object o);
Find the vtbl[] associated with Interface ic.