On Sun, 11 Sep 2011, Aditya Mahajan wrote:

> On Sun, 11 Sep 2011, Philipp A. wrote:
>
>> 2011/2/23 Mathieu Boespflug <0xbadcode@gmail.com>
>> 
>>> Hi all,
>>> 
>>> just as a followup and for the mailing list archives, the solution is
>>> to use both Aditya's suggestion to turn on \donknuthmode, as well
>>> replacing the & signs with their interpretations, namely
>>> \pgfmatrixnextcell. Thank you Aditya for the suggestion.
>>> 
>>> Regards,
>>> 
>>> Mathieu
>> 
>> 
>> umm, i can’t seem to get it to work. i use the mkiv minimals…
>> 
>> no combination of \donknuthmode, \nonknuthmode, \pgfmatrixnextcell and
>> “replace ampersand=foo”, that i tried, seems to work.
>> 
>> can anyone give me a minimal example of a working tikz matrix in a context
>> document? (preferrably something that prevents me from littering everything
>> with “\pgfmatrixnextcell”)
>
> One way around this is to re-read part of tikz module code under the right 
> catcode regime (ideally this should be done by t-tikz). I still cannot get & 
> to work, but using \& is a reasonable shortcut.
>
> Here is a working example:
>
> \usemodule[t-tikz]
> \usetikzlibrary{matrix}
>
> \unprotect
> \ReadFile{pgfmodulematrix.code.tex}
> \protect

A slightly more robust solution is to load the attached module instead of 
t-tikz. (It also patches \usetikzlibrary). However, I cannot figure out 
what is the expected catcode of & inside a tikz \matrix. So, you will 
still need to use amserand replacement=\&.

Note that this sets the catcode of ! to other (as expected by tikz). In 
the past, circuittikz has some troubles with the catcode of !.

Aditya