[Xy-pic] Conflict between unicode-math and xypic

[Ross Moore]

Hi Rémy, and Will,

On 06/11/2010, at 9:04 AM, Rémy Oudompheng wrote:

> Hello,
> 
> I am encountering a problem when using simultaneously xypic and
> unicode-math packages with lualatex. The following file compiles
> correctly with xelatex:
> 

I'm trying to trace this, but I'm having a problem
getting this to compile smoothly. 
On my system, using XeLaTeX it fails with:


! Undefined control sequence.
<argument> \zf at update@ff 
                         {+ssty=0}
l.5 \setmathfont{XITS Math}


I've manually updated to the latest  fontspec  unicode-math  expl3  
and also the XITS fonts.

Further tracing reveals this problem to originate with lines 1061-1066
of  unicodemath.sty :

\xetex_or_luatex:nnn { \um at zf@feature {ScriptStyle} }
  { \zf at update@ff{+ssty=0} }
  { \zf at update@ff{+ssty=1} }
\xetex_or_luatex:nnn { \um at zf@feature {ScriptScriptStyle} }
  { \zf at update@ff{+ssty=1} }
  { \zf at update@ff{+ssty=2} }

but there is no definition of  \zf at update@ff  in fontspec.sty
or other loaded package.

Will where should this macro be defined?
What is the correct way to fix this?


Using LuaLaTeX there is a similar but different failure:

! Undefined control sequence.
\fontspec_declare_shape:nnnn ...t }}\tl_if_eq:xxT 
                                                  {#3}{\itdefault }{\use:x {...
l.6 \setmathfont{XITS Math}





> \documentclass{minimal}
> \usepackage[matrix,arrow]{xy}
> \usepackage{unicode-math}
> \setmathfont{XITS Math}
> \begin{document}
> \xymatrix{ a \ar[r] & b }
> \end{document}


In fact the above errors are not fatal for this coding.
I get the results as shown in the attached images.
Neither exhibits the result you report.

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Could you please include  \listfiles  in your testing,
and send the result from the .log, showing what versions of the
packages you are using.

> 
> It should show something like "a -> b". However, using lualatex
> replaces the arrow by a big fat line. Removing the \setmathfont line
> fixes the problem. How can I debug this ? It seems to have appeared
> during an update of either luaotfload or unicode-math, but using an
> old version of xypic also works.
> 
> I attached uncompressed PDF files showing the right and the wrong output.
> 
> Regards,
> --
> Rémy Oudompheng
> <good.pdf><bad.pdf>


Hope this helps,

	Ross

------------------------------------------------------------------------
Ross Moore                                       ross.moore at mq.edu.au 
Mathematics Department                           office: E7A-419      
Macquarie University                             tel: +61 (0)2 9850 8955
Sydney, Australia  2109                          fax: +61 (0)2 9850 8114
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