[pstricks] Using \@ifnextchar in node definition

[Herbert Voss]

Am 11.11.2009 16:42, schrieb Christoph Bersch:
> 
> But then using raw coordinates or constructing the trailing part of the
> name should work, but it does not:

no, the \mynode{A} is not fully expanded when reading the
coordinates. That is the problem.

Herbert

> \documentclass{article}
> \usepackage{pst-node}
> \SpecialCoor
> \makeatletter
> \def\mynode{%
>    \@ifnextchar[{\mynode at i}{\mynode at i[]}
> }%
> \def\mynode at i[#1]#2{%
>    #2%
> }%
> \makeatother
> \begin{document}
> \begin{pspicture}(5,5)
>    \pnode(2,2){A}
>    \makeatletter
>    \psdot(! \pst at nodedict N@\mynode{A} GetCenter \tx at UserCoor end)
>    \makeatother
>    %
>    \pnode(1,1){AA}
>    \psdot(A\mynode{A})
> \end{pspicture}
> \end{document}
> 
> Both variants give me the error
> ! Use of \psdot at ii doesn't match its definition.
> 
> 
> Thank you,
> Christoph
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