- I found I never used the label feature, so I dropped it.
- I noticed that I was often repeating the argument list in the test and in the body, so the test and body are now implicitly wrapped in a fn and the one argument list is used for both.
- Sometimes I need to use the value of the test expression in the body, so the value returned by the test expression is now available in the body as it.
- I haven't used this yet so maybe I don't need it, but inspired by redef in Anarki the original function is now available in the body as orig.
I use extend when I need to conditionally redefine a function based on a specific test that I'm applying to the arguments. For other kinds of redefinitions, you may want to use redef or some other method.
