From: PELLOUIN Christophe <christophe.pellouin@wanadoo.fr>
To: Hans Hagen <pragma@wxs.nl>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Problem with arguments in macro
Date: Mon, 21 Jan 2013 20:47:57 +0100 [thread overview]
Message-ID: <50FD9B6D.5090907@wanadoo.fr> (raw)
In-Reply-To: <50FD89C6.8070807@wxs.nl>
Le 21/01/2013 19:32, Hans Hagen a écrit :
> On 1/21/2013 7:26 PM, PELLOUIN Christophe wrote:
>> Hello,
>>
>> When writing a macro, I observed that some arguments are not transmitted
>> correctly, particularly when the type is defined as "text".
>> Here is an example with the macro max defined in the file plain.mp
>> With this program:
>>
>> beginfig(1)
>>
>> show("first test");
>> show max (1,2,8,5,15,2,1,4);
>>
>> numeric u_;
>> v_=15;
>> show("second test");
>> show max (1,2,8,5,v_,2,1,4);
>>
>> numeric u_;
>> u_=15 % u_ variable is also defined in the macro max
>> show("third test");
>> show max (1,2,8,5,u_,2,1,4);
>>
>> endfig;
>> end
>>
>> The result is:
>>
>> This is MetaPost, version 1.504 (kpathsea version 6.0.1)
>> (mpost.mp (c:/texlive/2011/texmf-dist/metapost/base/plain.mp
>> Preloading the plain mem file, version 1.004)) (./bizzare.mp
>> >> "first test"
>> >> 15
>> >> "second test"
>> >> 15
>> >> "third test"
>> >> 8 [1] )
>> 1 output file written: bizzare.1
>> Transcript written on bizzare.log.
>>
>>
>>
>> The third result is different because the variable u_ is defined in the
>> macro max of the file plain.mp
>
> I can protect all local plain variables if needed but I'll only do it
> if someone then tests all the plain macros.
How can I protect a variable? I had the same bug in one of my macros and
I'd like to fix it.
Thanks
>
> Hans
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
> | www.pragma-pod.nl
> -----------------------------------------------------------------
>
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next prev parent reply other threads:[~2013-01-21 19:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-21 18:26 PELLOUIN Christophe
2013-01-21 18:32 ` Hans Hagen
2013-01-21 19:47 ` PELLOUIN Christophe [this message]
2013-01-21 19:50 ` Hans Hagen
2013-01-21 20:25 ` PELLOUIN Christophe
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