Re: nnimap-split-fancy: regexp ".*" matches less than expected

[Chris Marusich <cmmarusich@gmail.com>]

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Andreas Schwab <schwab@linux-m68k.org> writes:

> On Apr 06 2018, Chris Marusich <cmmarusich@gmail.com> wrote:
>
>> This is the same as before, but I've replaced "gnucash-user" with ".*".
>> I expected the same result as before, but Gnus surprised me.  Instead,
>> gnus-summary-respool-query says:
>>
>>   This message would go to list.user
>>
>> and gnus-summary-respool-trace says:
>>
>>   ("cc" "\\(.*\\)@gnucash.org" "list.\\1")
>>   "list.\\1"
>>
>> In this case, why does the ".*" match "user" instead of "gnucash-user"?
>
> I think that happens because the actual regexp used for searching is
> "\\(\\(FIELD\\):.*\\)\\<\\(VALUE\\)\\>", note the embedded ".*".

That would explain it.  Thank you!

It would be nice if the Gnus manual described in a little more detail
how the regexp defined in the "fancy" split method will be used.
Without knowledge that a ".*" was put in front of my regexp, the results
I was seeing made no sense.  I would submit a patch for the manual
myself, but I'm still just a Gnus beginner, so I can't (yet!) speak with
much authority on the subject.

By the way, where is this regexp defined in the Gnus source?  I ran "M-x
rgrep" with the following regexp in the Emacs 25.3 source but found no
results:

"\\\\\\\\(\\\\\\\\(.+?\\\\\\\\):\\.\\*\\\\\\\\)\\\\\\\\<\\\\\\\\(.+?\\\\\\\\)\\\\\\\\>"

"M-x regexp-builder" tells me that this regexp should match the regexp
string you mentioned above.  If you know of a better way for me to find
it in the source, I'd love to know!

Again, thank you for the help.

-- 
Chris

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