Re: \textext can fail in definitions in \startMPinclusions

[Hans Hagen <pragma@wxs.nl>]

Sanjoy Mahajan wrote:
> Another test file for metafun.  I know that textext doesn't work in
> loops.  I don't understand how it's implemented enough to know why, but
> is the reason for its not working in loops the same as the reason it
> doesn't work in included definitions (related to static analysis of the
> code)?
>
> The following file gives an example of what I mean.  It gives a page
> saying "unknown", but if one uses draw \textext{directly} directly (the
> commented-out line) then it works as expected.  I see the same behavior
> with \sometxt{}.  [All with context 2006.08.08]
>
> ====================  cut here ====================
> \starttext
> \startMPinclusions
> def yy = 
>   draw \textext{via yy def}
> enddef;
> \stopMPinclusions
>
> \startMPcode
>   % draw \textext{directly};  % would give "via yy def" as the text
>   yy;                         % gives "unknown" as the text on the page
> \stopMPcode
> \stoptext
> ====================  cut here ====================
>
> Oh maybe here's the problem.  The log file says (1.tex is the test
> file):
>
>   system(mpost  -progname=metafun -mem=metafun 1-mpgraph)...executed.
>
> Doing that by hand to get PDF gives a figure containing "unknown":
>
> $ mpost  -progname=metafun -mem=metafun 1-mpgraph
> $ mptopdf 1-mpgraph.1
>
> But "texexec --mpgraphic 1.mp" produces the right figure.  So why does
> \startMPcode run the wrong command?  The following works fine:
>
> ==================== cut here ====================
> \starttext
> \startMPinclusions
> def yy = 
>   draw \textext{via yy def};
> enddef;
> \stopMPinclusions
>   
\forceMPTEXgraphictrue

inclusions are not parsed for MPTEX content
> \startstaticMPfigure{a}
>   yy;
> \stopstaticMPfigure
>
> \usestaticMPfigure[a]
> \stoptext
> ==================== cut here ====================
>   
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