On Wed, 27 Jun 2012 02:23:07 -0400
Matthew Mondor <[email protected]> wrote:
> (defun apropos (string &optional package)
Alternate implementation:
(defun symbol-apropos-to-string (symbol)
(let ((out '()))
(macrolet ((push-string (string)
`(push ,string out)))
(push-string (prin1-to-string symbol))
(when (fboundp symbol)
(if (special-operator-p symbol)
(push-string " Special form")
(if (macro-function symbol)
(push-string " Macro")
(push-string " Function"))))
(when (boundp symbol)
(if (constantp symbol)
(push-string " Constant: ")
(push-string " has value: "))
(push-string (prin1-to-string (symbol-value symbol))))
(apply #'concatenate 'string (nreverse out)))))
(defun apropos (string &optional package)
"Args: (string &optional (package nil))
Prints those symbols whose print-names contain STRING as substring. If
PACKAGE is non-NIL, then only the specified PACKAGE is searched."
(setq string (string string))
(mapc #'(lambda (string)
(princ string)
(terpri))
(loop
with dupes = (sort (mapcar #'symbol-apropos-to-string
(apropos-list string package))
#'string-lessp)
for prec = nil then item
for item in dupes
unless (and prec (string-equal prec item)) collect item))
(values))
--
Matt
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