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.


 
function add(a, b)
   try
       a + b
   catch
       println("caught exception")
       a * b
   end
end
 
 
println(add(2, 6))
println(add(1//2, 1//2))
println(add("Hello ", "world"))
 