[NTG-context] esoteric macro expansion bug in t-bib?

10 Oct 2005

      esoteric macro expansion bug.

Dear Taco,

There is some esoteric macro expansion bug in the bib module (beyond my 
capability to understand). For example, the \Ibar macro works fine outside of 
the a= context. \getcommacommandsize can't seem to figure out that ## stands 
for an alignment preamble. Is there a way to protect the argument of a= ?

Please try the following :

================ibar-bib.bbl====================
\startpublication[k=amini93,
                  t=book,
                  a=al-Am\={i}n\~i,
                  y=1993,
                  s=]
\author[]{Mu\.hammad H\=ad\=i}[]{}{Al-Am\=in\=i}
\title{Mu\`allimu \~a\~l-\v S\=i\`ah: a~l-\v Say\h h al-Muf\=id}
%\pubname{}
\city{Beirut}
\pubyear{{1993}}
\stoppublication
===========================================

================ibar-bib.tex====================
% output=pdf interface=en

\usemodule[bib]

\def\SHIFT#1{\dimen0=.00#1ex \multiply\dimen0 by\fontdimen1\font
    \kern-.0156\dimen0} % compensate for slant/italic in lower accents

\def\USHIFT#1{\dimen0=.00#1ex \multiply\dimen0 by\fontdimen1\font
             \kern.0156\dimen0} % compensate for slant/italic in upper accents

\def\IBAR%
{\leavevmode\vbox{\offinterlineskip\lineskip0.295ex%
\ialign{##\cr\USHIFT{120}\hfill\hbox to .21243em{\leaders\hrule
height .07ex\hfill}\hfill\SHIFT{1}\cr\i\cr}}}

\definecharacter imacron          {\IBAR} % ConTeXt-dependent!

\setupwhitespace[big]

\starttext

\cite[amini93]

M\=irz\=a

\section{References}{\tfx\setupinterlinespace
{\leavevmode\placepublications}}

\stoptext
===========================================

I get the following error

===========================================
systems         : begin file ibar-bib at line 20
! Illegal parameter number in definition of \commacommand.
<to be read again>
                   \cr
\IBAR ...lineskip \lineskip 0.295ex\ialign {##\cr
                                                  \USHIFT {120}\hfill \hbox 
...

\dohandleaccent ... #1\string #2\empty \endcsname
                                                  \else \ifcsname 
\accentpre...

\thebibauthors ->{al-Am\={i}
                            n\~i}
\getcommacommandsize [#1]->\edef \commacommand {#1
                                                  }\scratchtoks 
\expandafter...

\dobibauthoryear ...acommandsize [\thebibauthors ]
                                                  \@EA \processcommalist 
\@E...
...
===========================================

Please advise-)

Best
Idris

============================
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523