bug#23484: 25.1.50; undo doesn't work properly in xref-query-replace-in-results

[Dmitry Gutov]

On 05/12/2016 11:57 PM, Juri Linkov wrote:

> So I see your aim is to use regexp replacements without regexps,
> i.e. with only a list of region boundaries like is used by
> region-noncontiguous-p in perform-replace.

This may sound crazy, but shouldn't just using region-extract-function 
to return the list of region bounds work? FROM-STRING can then be `.*' 
without a problem.

> I guess this could be
> achieved with more hacking in real-match-data (maybe to use a layer
> like replace-match-data).

A lot code in perform-replace is really beyond my comprehension, but why 
would the undo code muck around with replaying match data? It could just 
as well repeat the searches.