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annotate emacs/repl-comment.el @ 0:509549c55989

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author Henry S. Thompson <ht@inf.ed.ac.uk>
date Tue, 25 May 2021 13:57:42 -0400
parents
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Henry S. Thompson <ht@inf.ed.ac.uk>
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1 ;; Universal (?) replace comment in function
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2
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3 ;; Last edited: Thu Oct 7 09:39:50 1993
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Henry S. Thompson <ht@inf.ed.ac.uk>
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4 (defun repl-comment (fn comment)
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5 "replace/install as FN's comment COMMENT, no matter what emacs/compiler"
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6 (let ((defn (symbol-function fn)))
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7 (if (consp defn)
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8 (if (eq (car defn) 'autoload)
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9 (progn (load-library (car (cdr defn)))
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10 (if (equal defn (symbol-function fn))
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11 (error "autoloading didn't help define %s" fn)
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Henry S. Thompson <ht@inf.ed.ac.uk>
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12 (repl-comment fn comment)))
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13 ;; either symbolic or old byte-compiler
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14 (if (eq (car defn) 'lambda)
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15 (if (stringp (car (cdr (cdr defn))))
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16 (rplaca (cdr (cdr defn))
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17 comment)
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18 (rplacd (cdr defn)
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19 (cons comment
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20 (cdr (cdr defn)))))
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21 (error "can't diagnose defn %s" defn)))
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Henry S. Thompson <ht@inf.ed.ac.uk>
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22 ;; array or not
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Henry S. Thompson <ht@inf.ed.ac.uk>
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23 (if (compiled-function-p defn)
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24 (fset fn (repl-byte fn (list (cons 4 comment))))
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25 (error "unrecognised defn %s" defn)))))
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26
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Henry S. Thompson <ht@inf.ed.ac.uk>
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27 (defun repl-byte (fn alist)
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28 "compute a new byte-code defn for FN, replacing
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29 elements using ALIST, which is interpreted as (index . newbit).
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30 Elements are 0: arglist 1: byte-codes 2: symbols 3: stack-depth 4: comment"
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31 (let
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32 ((defn (symbol-function fn)))
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33 (let ((ln (if (sequencep defn)
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34 (length defn)
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35 ;; hack otherwise
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36 6))
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37 (i 0)
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38 new entry)
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39 (apply (function make-byte-code)
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40 (progn (while (< i ln)
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41 (setq new
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42 (cons
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43 (if (setq entry (assoc i alist))
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44 (cdr entry)
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45 (aref defn i))
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46 new))
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47 (setq i (1+ i)))
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48 (nreverse new))))))
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49
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50
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51 (provide 'repl-comment)