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A lambda question

re: Now that we've supposedly finished with function-type,
    is anybody working on a proposal to introduce a func-
    tion that would retrieve the lambda-expression defini-
    tion from a user-defined function object?

Lucid Common Lisp has such a function, called SOURCE-CODE.  It retrieves 
the lambda expression used in an interpretive definition, even after sub-
sequent compilation of the function; but it does not attempt to maintain 
an "out-of-core" database like the emacs TAGS facility.

-- JonL --