Re: problem with vardefs

[Hans Hagen <pragma@wxs.nl>]

At 03:41 PM 12/7/00 +0100, Denis B. Roegel wrote:
>How am I supposed to write a vardef with `@#' in context?
>For instance, the following
>
>\startuseMPgraphic{annot}
>  vardef annot@#(suffix n)% noeud
>    (expr l)% étiquette
>    (expr a)% angle
>    =
>    label@#(l,n.c+(cosd a,sind a)*labdist);
>  enddef;
>\stopuseMPgraphic
>
>produces the error:
>
>! Illegal parameter number in definition of \MP:annot.
><to be read again> 
>                   (
><argument>  vardef annot@##(
>                            suffix n)(expr l)(expr a)=
label@##(l,n.c+(cosd ...
>
>\dostartuseMPgraphic ...leuseMPgraphic {#1}{#2}{#3
>                                                  }}
>l.54 \stopuseMPgraphic

# symbols are always nasty for tex since there are some low level hard
coded things going on which makes it nearly impossible to catch them, 

\appendtoks \let\#\hashletter \to \everyMPgraphic

\startuseMPgraphic{annot}
  vardef annot@\#(suffix n)% noeud
    (expr l)% tiquette
    (expr a)% angle
    =
    label@\#(l,n.c+(cosd a,sind a)*labdist);
  enddef;
\stopuseMPgraphic

Mea Culpa, 

Hans 
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