Earlier quoted context omitted.
This technique is limited by the fact that it only works if all the messages are sent to x, rather than x being sent some message.
You mean "rather than x being sent to some message"? E.g. 0 > x wouldn't work, because the message #> is sent to 0 with x as an argument? In a case like that you can still make it work by exploiting the fact that arithmetic and comparison operators implement double dispatch. The implementation of > for an Integer would send a message to x: Integer::> aNumber ^x adaptToInteger: self andCompare: # Even if x is passed a…
Thanks! I didn't consider the fact that objects are opaque.