[pstricks] pstricks.tex doesn't load per-format pgf utility driver

[Herbert Voss]

Am 23.10.22 um 08:03 schrieb muzimuzhi Z:
> Hi all,
>
> Currently, `pstricks.tex` loads pgfkeys and pgffor using
>
>     % lines 77--81
>     \ifx\pgfkeysloaded\relax\else
>       \input pgfutil-common.tex
>       \input pgfkeys.code.tex
>       \input pgffor.code.tex
>     \fi
>
>
> This way, only the common pgf utility driver `pgfutil-common.tex` is 
> loaded, and the per-format driver `pgfutil-(plain|latex|context).def` 
> is missing.
>
> This will cause problems with the latest pgf dev 
> (https://github.com/pgf-tikz/pgf), in which now `\pgfutil at protected`, 
> a command defined only in per-format driver, is needed by `pgffor`. 
> See commit
> https://github.com/pgf-tikz/pgf/commit/5d099a8399436f46fba0ea464b54c301b1656abe
> and example below

thanks for the report, I'll update PSTricks.

Herbert






>
>     \documentclass{article}
>     \usepackage{pstricks}
>     \begin{document}
>     \end{document}
>
>
> ! Undefined control sequence.
> l.1640 \pgfutil at protected
>                          \def\pgfmathprintnumber{%
>
> A simple workaround would be to load pgffor in `pstricks.tex` by
>
>     % no need to provide \ProvidesPackageRCS
>
>     \ifx\pgfkeysloaded\relax\else
>       \ifdefined\@latexerr % format is latex
>         \RequirePackage{pgffor} % pgffor depends on pgfkeys
>       \else % format is plaintex
>         \input pgffor.tex
>       \fi
>     \fi
>
>
>
> best regards,
> Yukai Chou
>
> --
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