From: "Wolfgang Schuster" <schuster.wolfgang@googlemail.com>
To: "mailing list for ConTeXt users" <ntg-context@ntg.nl>
Subject: Re: system macros/doquadrupleemtpy
Date: Thu, 4 Sep 2008 08:45:03 +0200 [thread overview]
Message-ID: <115224fb0809032345u4c29ccf2o5b8f76df7d3535d7@mail.gmail.com> (raw)
In-Reply-To: <F55E008D-0D0E-4826-8B16-0A7EC3B2D6CD@uni-bonn.de>
On Wed, Sep 3, 2008 at 4:41 PM, Thomas A. Schmitz
<thomas.schmitz@uni-bonn.de> wrote:
> Hi all,
>
> I'm trying to define a macro \Command which can either have four or
> five arguments. If it has five, I want to define them as
>
> \Command1[#1][#2][#3][#4]{#5}
>
> if it has four, as
>
> \Command2[#1][#2][#3]{4#}
>
> I thought this would be the way to go:
>
> \def\Command{%
> \doquadrupleempty\doCommand}
>
> \def\doCommand{%
> \iffifthargument%
> \doquadrupleargument\Command1%
> \else%
> \dotripleargument\Command2%
> \fi}
>
> but that gives me errors about "too many }s". So I'm wondering: am I
> on the wrong track? Can this be done at all?
>
> Thanks, and best
>
> Thomas
\def\Commanda
{\doquadrupleempty\doCommanda}
\def\doCommanda[#1][#2][#3][#4]%
{\iffourthargument
\def\next{\doCommandafive[#1][#2][#3][#4]}%
\else
\def\next{\doCommandafour[#1][#2][#3]}%
\fi\next}
\def\doCommandafive[#1][#2][#3][#4]#5%
{five arguments}
\def\doCommandafour[#1][#2][#3]#4%
{four arguments}
\def\Commandb
{\doquadrupleempty\doCommandb}
\def\doCommandb[#1][#2][#3][#4]%
{\iffourthargument
\def\next{\dodoCommandb[#1][#2][#3][#4]}%
\else
\def\next{\dodoCommandb[#1][#2][#3][]}%
\fi\next}
\def\dodoCommandb[#1][#2][#3][#4]#5%
{\doifelsenothing{#4}
{four arguments}
{five arguments}}
\starttext
\Commanda[1][2][3][4]{5}
\Commanda[1][2][3]{4}
\Commandb[1][2][3][4]{5}
\Commandb[1][2][3]4
\Commandb[1][2][3][]{4} % feature
\stoptext
Wolfgang
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next prev parent reply other threads:[~2008-09-04 6:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-03 14:41 Thomas A. Schmitz
2008-09-03 16:58 ` Aditya Mahajan
2008-09-04 7:39 ` Thomas A. Schmitz
2008-09-03 18:32 ` Peter Rolf
2008-09-04 6:45 ` Wolfgang Schuster [this message]
2008-09-04 8:21 ` Thomas A. Schmitz
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