optional arguments, if(nth)argument

optional arguments, if(nth)argument

[Henning Hraban Ramm]

Hello again!

Today I'm trying a lot of new (to me) things...
This time, a macro with optional arguments and \if...argument :

\def\SkillField{\dodoubleempty\doSkillField}

\def\doSkillField[#1][#2]#3{\bTR\bTD #3
	\iffirstargument\hfill (#1)\fi     % don't print when no optional 
argument
	\eTD \bTD
	\ifsecondargument                  % if second optional arg is provided
		\definefield[#2][line][Skill][#1]\field[#2]
	\else                              % if no second optional arg
		\definefield[#3][line][Skill][#3]\field[#3]
	\fi
	\eTD\eTR}

e.g.
\SkillField[+8][Aergern]{Ärgern} % works
\SkillField[+1]{Labern} % does nothing instead of "else"
\SkillField{Testen} % does "\hfill (#1)", but should do nothing

Apparently, the \if...argument ... \else don't work as they should.
Where's my mistake?


Grüßlis vom Hraban!
---
http://www.fiee.net/texnique/
http://contextgarden.net

Re: optional arguments, if(nth)argument

[Taco Hoekwater]

Hi,

There is interference with the \bTR macro. It works fine with all
TABLE commands removed. The table macros like \bTR and \bTD
themselves use \dodoubleempty.

Greetings, Taco

Henning Hraban Ramm wrote:
> Hello again!
> 
> Today I'm trying a lot of new (to me) things...
> This time, a macro with optional arguments and \if...argument :
> 
> \def\SkillField{\dodoubleempty\doSkillField}
> 
> \def\doSkillField[#1][#2]#3{\bTR\bTD #3
>     \iffirstargument\hfill (#1)\fi     % don't print when no optional 
> argument
>     \eTD \bTD
>     \ifsecondargument                  % if second optional arg is provided
>         \definefield[#2][line][Skill][#1]\field[#2]
>     \else                              % if no second optional arg
>         \definefield[#3][line][Skill][#3]\field[#3]
>     \fi
>     \eTD\eTR}
> 
> e.g.
> \SkillField[+8][Aergern]{Ärgern} % works
> \SkillField[+1]{Labern} % does nothing instead of "else"
> \SkillField{Testen} % does "\hfill (#1)", but should do nothing
> 
> Apparently, the \if...argument ... \else don't work as they should.
> Where's my mistake?
> 
> 
> Grüßlis vom Hraban!
> ---
> http://www.fiee.net/texnique/
> http://contextgarden.net
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
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