From: Hans Hagen <pragma@wxs.nl>
Subject: Re: Append to a commalist
Date: Thu, 12 Oct 2006 15:49:08 +0200 [thread overview]
Message-ID: <452E47D4.3080002@wxs.nl> (raw)
In-Reply-To: <EA7A899A33DA84438358BD72438B4A1B371249@ms1.acobiaflux.ad>
Fredrik Sjunnesson wrote:
> Hello,
>
> Is there a smart way to create a commalist?
>
> I want to get the equivalent of
>
> \setparameter[namespace][listname={item1,item2,item3}]
>
> but be able to append one item at the time, like
>
> \append{namepace}{listname}{item1}
> \append{namepace}{listname}{item2}
> \append{namepace}{listname}{item3}
>
> I have tired this:
>
> \def\append#1#2#3{
> \fullexpandoneargafter\doifemptyelse{\getvariable{#1}{#2}}
> {\edef\tmp{#3}}
> {\edef\tmp{\getvariable{#1}{#2},#3}}
> \setvariables[#1][#2={\tmp}]}
>
> but it only works for one list. Apparently \tmp is not expanded so when
> an item is appended to one list all other lists are affected. I have
> tried \expanded but got the message stack full.
>
> Any help would be greatly appreciated.
>
>
\def\appendtovaluelist#1#2%
{\ifcsname#1\endcsname
\expandafter\ifx\csname#1\endcsname\empty
\expandafter\def\csname#1\endcsname{#2}%
\else
\expandafter\def\csname#1\expandafter
\expandafter\expandafter\endcsname
\expandafter\expandafter\expandafter{\csname#1\endcsname,#2}%
\fi
\else
\expandafter\def\csname#1\endcsname{#2}%
\fi}
% saves an argument:
\def\appendtovaluelist#1%
{\ifcsname#1\endcsname
\expandafter\ifx\csname#1\endcsname\empty
\expandafter\noappendtovaluelist
\csname#1\expandafter\expandafter\expandafter\endcsname
\else
\expandafter\doappendtovaluelist
\csname#1\expandafter\expandafter\expandafter\endcsname
\fi
\else
\expandafter\noappendtovaluelist\csname#1\expandafter\endcsname
\fi}
\def\doappendtovaluelist#1#2{\expandafter\def\expandafter#1\expandafter{#1,#2}}
\def\noappendtovaluelist#1#2{\def#1{#2}}
\appendtovaluelist{mylist}{aap}
\appendtovaluelist{mylist}{noot}
\appendtovaluelist{mylist}{mies}
\showvalue{mylist}
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Hans Hagen | PRAGMA ADE
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tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
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next prev parent reply other threads:[~2006-10-12 13:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-12 11:38 Fredrik Sjunnesson
2006-10-12 13:49 ` Hans Hagen [this message]
2006-10-12 15:31 ` Aditya Mahajan
2006-10-12 17:15 ` Hans Hagen
2006-10-12 21:15 Fredrik Sjunnesson
2006-10-12 22:03 ` Hans Hagen
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