Re: latest auctex CVS fails to load under xemacs 21.5.19

Ralf Angeli <[email protected]> writes:

> * Artemio Gonzalez Lopez (2005-03-15) writes:
>
>> Visiting a tex file in the latest CVS auctex under xemacs 21.5.19 
>> (CVS-20050227) fails to load auctex, and produces the following backtrace:
>>
>> (1) (file-mode-spec/warning) Error in File mode specification:
>> Wrong type argument: stringp, 12
>>
>> Backtrace follows:
>>
>>    string-match("^[0-9]+" 12)
>>    # bind (base-size-string face-name num --dotimes-temp--50522 i)
>>    font-latex-make-title-faces()
>
> Oh great.  `font-size' can return a string _and_ a number?  The
> function unfortunately is not documented.  But looking at
> `x-font-create-object' it seems that it may return a number if the
> font name includes the size in points and a string if this is not
> the case but the size in pixels is given.  And to make it even more
> interesting it can return nil if no size is specified.

I suppose this is one of those cases Stephen was referring to when he
said that XEmacs chose not to follow Emacs' deficient APIs in all
cases.

Sorry, could not resist.  I tried.  Wouldn't do.

I almost think this might be worth filing a bug report: if the
function is not documented and returns inconsistent stuff, chances are
that it is the completely wrong interface to use and people on the
xemacs-beta list might tell you what to do instead.

We _do_ have font size calculating code in preview/prv-xemacs.el.  It
might be worth taking a look there: AFAIR, this worked pretty well
consistently.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum