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Re: History for query replace pairs

From: Juri Linkov
Subject: Re: History for query replace pairs
Date: Sun, 09 Nov 2014 00:51:38 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (x86_64-pc-linux-gnu)

> I'm okay with delaying the changes in the manual, but as for NEWS, you
> cannot expect people who track the trunk to start using something
> about which they have no hints at all.  At the very least, post some
> initial information here.  Also, NEWS can explain features that have
> no expression at all in user-level options; as long as there are
> user-visible changes in behavior or keybindings or their meaning, this
> is definitely NEWS-worthy stuff.

I just added a few lines about this feature to NEWS.

> You could do that test only in interactive calls

It seems the only remaining place to use char-displayable-p is
in the interactive call, and like isearch-text-char-description
replaces every character for its display representation, this code
could do something similar to convert the characters to be displayable:

(setq query-replace-from-to-separator
        (lambda (c)
          (if (or (char-displayable-p c)
                  (not (eq c ?\u2192)))
              (char-to-string c)
        (get-text-property 0 'display query-replace-from-to-separator)

Or maybe better would be to create two variables
with different versions of the separator?

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