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:keep-stub-functions

Keyword

Default value: t

When this is non- nil , all functions deleted by the treeshaker are replaced by small stub functions. When a deleted function is called by the application, its stub prints a message telling you that the function has been deleted and how it can be reinstated. These stubs can take up a lot of space if you smash large packages, but are invaluable while refining delivery parameters.

For instance, if your application calls complexp after delivery with :keep-complex-numbers set to nil , a message like the following is printed:

Attempt to invoke function COMPLEXP on arguments (10).
  COMPLEXP was removed by Delivery keyword :KEEP-COMPLEX-NUMBERS
  NIL.
  Try :KEEP-COMPLEX-NUMBERS T.

LispWorks Delivery User Guide - 14 Mar 2008

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