[NTG-context] MP keyval interface

[NTG-context] MP keyval interface

[Jens-Uwe Morawski]

Ahoi MP experts,

i've tried to implement a keyval-interface in MP.

Currently it looks like

def keyvalFunc (text t) =
	begingroup;
	save status, col ;
	numeric status; string col ;
		t ;
	show status;
	show col ;
	endgroup;
enddef;

keyvalFunc(status=1.0; col="Hallo" ) ;

This works, of course, but i would prefer if i could
use a comma instead of the ";" to separate the keyval-pairs.

Any ideas, how i can make "," be locally like ";"?

Thanks in advance.

Jens
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Re: [NTG-context] MP keyval interface

[Emil Hedevang Lohse]

Jens-Uwe Morawski <morawski@gmx.net> writes:

> Ahoi MP experts,
> 
> i've tried to implement a keyval-interface in MP.
> 
> Currently it looks like
> 
> def keyvalFunc (text t) =
> 	begingroup;
> 	save status, col ;
> 	numeric status; string col ;
> 		t ;
> 	show status;
> 	show col ;
> 	endgroup;
> enddef;
> 
> keyvalFunc(status=1.0; col="Hallo" ) ;
> 
> This works, of course, but i would prefer if i could
> use a comma instead of the ";" to separate the keyval-pairs.
> 
> Any ideas, how i can make "," be locally like ";"?

Perhaps 

begingroup
let ,=;;
endgroup

will do the job.


-- 
Emil Hedevang Lohse <http://home.imf.au.dk/emil/> 

Alle spørgsmål er lige dumme. 
Og spørgsmålet "Kan ænder flyve?" er ikke dumt.
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Re: [NTG-context] MP keyval interface

[Jens-Uwe Morawski]

On 17 Oct 2002 16:03:26 +0200
Emil Hedevang Lohse <emil@imf.au.dk> wrote:

> Jens-Uwe Morawski <morawski@gmx.net> writes:
> 
> > Ahoi MP experts,
> > 
> > i've tried to implement a keyval-interface in MP.
> > 
> > Currently it looks like
> > 
> > def keyvalFunc (text t) =
> > 	begingroup;
> > 	save status, col ;
> > 	numeric status; string col ;
> > 		t ;
> > 	show status;
> > 	show col ;
> > 	endgroup;
> > enddef;
> > 
> > keyvalFunc(status=1.0; col="Hallo" ) ;
> > 
> > This works, of course, but i would prefer if i could
> > use a comma instead of the ";" to separate the keyval-pairs.
> > 
> > Any ideas, how i can make "," be locally like ";"?
> 
> Perhaps 
> 
> begingroup
> let ,=;;
> endgroup
> 
> will do the job.

Thanks. I've already tried this. The problem was that it changes
the meaning globally, since MP groups do nothing until one 'save's
variables inside the group. But surprisingly (for me) this works:

 begingroup
 save , ;
 let ,=; ;
 endgroup

Jens
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