🚀 go-pugleaf

 => Anyone have a GNU implementation of the Atom Query Replace command
 => available with ZEMACS on the Symbolics Lisp Machines?  In case you
 => are wondering, this command only replaces atoms, and is great for
 => renaming variables in code.  Thanks in advance...Jeff

No that I know of, but you can easily simulate it with regular
expressions and syntax tables. An "atom" is basically a non-symbol
character, followed by a word, followed by another non-symbol character.
In regexps, we can use:

	\S_\<the-word-you-are-searching\>\S_

In regexp syntax, \S_ refers to a character whose syntax is NOT `_'; the
`_' syntax is the syntax of symbols which, in addition to the characters
that make up words, make up variable and command names. (For example,
"-", "_", "*", etc.) This excludes whitespace, "(" and ")", etc. Then,
\< refers to the beginning of a word, and \> refers to the end of a
word.

So, if you use M-x query-replace-regexp, or M-x tags-query-replace,
suppose you want to replace "old-variable-name" with
"new-variable-name". Just use

	\S_\<old-variable-name\>\S_

and replace with

	new-variable-name

Or you can write your own function:

   (defun atom-query-replace (&optional old new)
     (interactive)
     (if (not (and old new))
	 (setq old (read-from-minibuffer "Query replace: ")
	       new (read-from-minibuffer (format "Query replace %s with: "
						 old))))
     (query-replace-regexp (concat "\\S_\\<" old "\\>\\S_") new))

The elisp Info nodes to look at are "Syntax Tables" and "Regular
Expressions". Hope this helps!
--
Raul Acevedo
acevedo@athena.mit.edu

"Remember, Information is not knowledge; Knowledge is not Wisdom;
Wisdom is not truth; Truth is not beauty; Beauty is not love;
Love is not music; Music is the best."
	 - Frank Zappa