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leon_z 2003-11-30
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The DYNAMIC_DOWNCAST macro provides a handy way to cast a pointer to a pointer to a class object while checking to see if the cast is legal. The macro will cast the pointer parameter to a pointer to an object of the class parameter's type.
If the object referenced by the pointer is a "kind of" the identified class, the macro returns the appropriate pointer. If it isn't a legal cast the macro returns NULL.
If the object referenced by the pointer is a "kind of" the identified class, the macro returns the appropriate pointer. If it isn't a legal cast the macro returns NULL.
simouse 2003-11-30
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??
哟西哟西地 2003-11-30
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?
