[Openmcl-devel] accessing lexical variables (lexical-environment vs definition-environment)

Marco Baringer mb at bese.it
Tue Jul 19 07:34:02 PDT 2005

i need a function which, at macro expansion time, collects the names
(as symbols) of all the visibile lexical variables. is there anything
which looks blatently wrong with this?

(defun lexical-variables (environment)
     for env = environment
          then (ccl::lexenv.parent-env env)
     while (and env
                (not (ccl::istruct-typep env 'ccl::definition-environment)))
     for vars = (ccl::lexenv.variables env)
     when (listp vars)
     append (mapcar (lambda (var)
                      ;; ccl::var-name is a macro, se we can't do #'ccl::var-name directly
                      (ccl::var-name var))

in particular i want to make sure that i can stop looking for
variables as soon as i hit a definition-environment object.


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There is a crack in everything.
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