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Re: Language identification

From: Juri Linkov
Subject: Re: Language identification
Date: Sun, 30 Aug 2009 01:48:35 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (x86_64-pc-linux-gnu)

>     > OTOH, how often do you see a file containg programming language code and
>     > yet without ny extension?
>     More often with a non-standard extension than without any extension.
> So why not rename the files, or put in -*- lines?

Often this is not possible when files are not under my control.

>     Also there are conflicting extensions like e.g. ".pl" for both
>     Perl and Prolog (esp. SWI-Prolog).
> Perhaps we should promote .plg for Prolog.

I'd rather prefer to promote changing the Perl file extension since
Prolog is older than Perl :)  But I think neither is realistic.

Currently I use this hack in .emacs to distinguish between Perl and Prolog:

(add-hook 'find-file-hooks
          (lambda ()
            (when (and (looking-at "#") (string-match "Prolog" mode-name))

since almost all Perl files begin with a comment, even library files
that have no shebangs.

But I agree such guessing is unreliable.

Juri Linkov

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