* Why does this METAPOST vardef 'save' statement fail?
@ 2020-03-14 14:45 Gerben Wierda
2020-03-14 14:50 ` Gerben Wierda
0 siblings, 1 reply; 2+ messages in thread
From: Gerben Wierda @ 2020-03-14 14:45 UTC (permalink / raw)
To: mailing list for ConTeXt users
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I have this vardef:
vardef Foo(expr w, h) =
save pth; path pth;
%save pth2; path pth2;
save pic; picture pic;
pth = fullsquare xysized (w, h);
%pth2 = fullsquare xysized (h/4, h/8)
pic := image (
draw pth;
%draw pth2 shifted (-w/2, -h/4);
% all kind of stuff here
);
setbounds pic to pth;
pic
enddef ;
As soon as I uncomment the bold line (first comment) a mtxrun fails. Whatever I try, a single save statement, etc., I fail in getting a second local variable. The METAPOST manual is no help.
The error shown is:
metapost log > ! Extra tokens will be flushed.
metapost log > <to be read again>
metapost log > 2
metapost log > Foo->...h;path.pth;save.pth2
metapost log > ;path.pth2;save.pic;pictur...
metapost log > <*> ... ; s := Foo(8cm, 2cm)
metapost log > ; draw s; drawdot center l...
metapost log >
Why?
G
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* Re: Why does this METAPOST vardef 'save' statement fail?
2020-03-14 14:45 Why does this METAPOST vardef 'save' statement fail? Gerben Wierda
@ 2020-03-14 14:50 ` Gerben Wierda
0 siblings, 0 replies; 2+ messages in thread
From: Gerben Wierda @ 2020-03-14 14:50 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Answering myself: pth2 is not a valid variable name. Digits are not allowed.
> On 14 Mar 2020, at 15:45, Gerben Wierda <gerben.wierda@rna.nl> wrote:
>
> I have this vardef:
>
> vardef Foo(expr w, h) =
> save pth; path pth;
> %save pth2; path pth2;
> save pic; picture pic;
> pth = fullsquare xysized (w, h);
> %pth2 = fullsquare xysized (h/4, h/8)
> pic := image (
> draw pth;
> %draw pth2 shifted (-w/2, -h/4);
> % all kind of stuff here
> );
> setbounds pic to pth;
> pic
> enddef ;
>
> As soon as I uncomment the bold line (first comment) a mtxrun fails. Whatever I try, a single save statement, etc., I fail in getting a second local variable. The METAPOST manual is no help.
>
> The error shown is:
>
> metapost log > ! Extra tokens will be flushed.
> metapost log > <to be read again>
> metapost log > 2
> metapost log > Foo->...h;path.pth;save.pth2
> metapost log > ;path.pth2;save.pic;pictur...
> metapost log > <*> ... ; s := Foo(8cm, 2cm)
> metapost log > ; draw s; drawdot center l...
> metapost log >
>
> Why?
>
> G
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
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