[dev-context] new mp feature

[Hans Hagen]

Mojca Miklavec wrote:
> Question, questions and questions again ...
>
> The question from yestarday wasn't a serious one. But this one might
> get closer. After I've rewritten the context.trm to try the new
> \sometxt out, I struggled against the following problem:
>
> \startMPcode
> picture p;
>
> vardef rotateme(expr m) =
>     (m rotated 90)
> enddef;
>
> % this works
> p := \sometxt{sin (x)};
> draw rotateme(p);
>
> % this doesn't
> draw rotateme( \sometxt{sin (x)} );
> \stopMPcode
>
> Is handling the second situation too complext for the existing
> mechanism? The solution on "my side" is trivial - I can split the
> behaviour in the gnuplot module to work in two steps instead in a
> single one, but perhaps this can be easility fixed as well.
it works ok if we remove the ; from the \sometxt macro

\starttext

\long\def\sometxt#1{sometxt(nexttxt)} % to be used in mp definitions

\startMPcode
vardef rotateme(expr m) =
    (m rotated 90)
enddef;

picture p;
p := \sometxt{$\sin(x)$};
draw rotateme(p);

draw rotateme(\sometxt{$\cos(x)$});
\stopMPcode

\stoptext


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