Re: Wrapper for query-replace does not use query-replace-history

[Barry Margolin]

In article 
<2cccace8-2617-40bd-ba82-9163412ba3db@e21g2000yqb.googlegroups.com>,
 Nordlöw <per.nordlow@gmail.com> wrote:

> Hey I have a built a convenience wrapper for query-replace-regexp that
> surrounds it argument with beginning and end of symbol regexps. I want
> it to modify query-replace-history but it doesn't. Why?

History is maintained by the prompting part of the UI.  Since your 
function never calls query-replace-read-from or query-replace-read-to to 
read the arguments interactively, history isn't updated.  See the source 
code for query-replace.

> 
> /Nordlöw
> 
> Code follows.
> 
> (defun build-symbol-regexp (id)
>   "Matches an ID as single word symbol (or C identifier) that
> does not respect underscore."
>   (concat "\\_<" id "\\_>"))
> 
> ;; In Emacs-Lisp mode minus-sign is not allowed before or after.
> (defun query-replace-symbol (source dest)
>   "Rename a symbol (currently C-style) string symbol (identifier)
> which unique name
>  is determined by SOURCE replacing it with DEST."
>   (interactive "sQuery replace symbol (identifier): \nsReplace with:
> ")
>   (query-replace-regexp (build-symbol-regexp
>                          (regexp-quote source)) ;quote string to
> regexp
>                         (concat dest)))

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
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