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bug#28456:; \\input parsing

From: Pierre Lorenzon
Subject: bug#28456:; \\input parsing
Date: Sat, 16 Sep 2017 05:23:06 +0200 (CEST)

Hi Mosè,

Here is a small hack to fix this bug in particular case I
encountered but I am not sure that the regexp is able to render
the whole complexity of expressions that might be parsed.

>>>  -- Patch 
(defconst regexp-input
  "Regexp used to match \\input{something}")

(defconst regexp-include
  "Regexp used to match \\include{something}")

(add-to-list 'LaTeX-auto-regexp-list
              (list regexp-input 1 'TeX-auto-file))
(add-to-list 'LaTeX-auto-regexp-list
              (list regexp-include 1 'TeX-auto-file))

>>>  -- End Patch

It is clear that two constants above derive from the same
expression and that a common model might certainly be defined
for all these regexps.


From: Mosè Giordano <address@hidden>
Subject: Re: bug#28456:; \\input parsing
Date: Fri, 15 Sep 2017 18:44:15 +0200

> Hi Pierre,
> 2017-09-14 7:55 GMT+02:00 Pierre Lorenzon <address@hidden>:
>> As if second \input
>>   \input{../../Exercices/Ensembles/Applications-Proprietes}
>> were not parsed when first one
>>   \input{Introduction}
>> is. In fact looking carefully at regexp used to match \\input
>> which is part of the LaTeX-auto-regexp-list variable, it
>> clearly appears that an path like \input{../../something} will
>> not be parsed.
> I can reproduce the error and confirm your analysis.
>> Question is why? When LaTex allows inputs with so complexe
>> paths, why are they not parse by auctex?
> It's hard to answer the question: that regexp has been there for more
> than 20 years now ;-)
> I don't have the time to do it now (I also have a flaky Internet
> connection in this period), but if someone wants to tackle this issue,
> I fixed something similar for \addbibresource a few months ago:
>     * b2f69e18 (2017-03-31)  Fix detection of bibliography files with
>     dots in path
> Please, also add a test.  Maybe this could be an occasion to review
> similar regexps (for \include, \bibliography, etc), or maybe have a
> common variable for all this cases.
> Bye,
> Mosè

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