Task

Demonstrate how to make the object respond (sensibly/usefully) to an invocation of a method on it that it does not support through its class definitions.

Note that this is not the same as just invoking a defined method whose name is given dynamically; the method named at the point of invocation must not be defined.

This task is intended only for object systems that use a dynamic dispatch mechanism without static checking.



Related task

   Send an unknown method call.


obj[foo] = "This is foo.";
obj[bar] = "This is bar.";
obj[f_Symbol] := "What is " <> SymbolName[f] <> "?";
Print[obj@foo];
Print[obj@bar];
Print[obj@baz];