special macro problem again...

special macro problem again...

[Peter Münster]

Hello,
with the help by Hans, I've got a nice little macro "\MyMacro".
Now, I get another problem, when using "\doifmode" in the argument of this
macro. This is the error message: ! Incomplete \iffalse
And here the example file:

\newcount\MyVersion
\def\MyMacro#1{%
  \getgparameters[XXX][#1]
  \global\advance\MyVersion by 1
  \bTR \expanded{\bTD \the\MyVersion \eTD} \expanded{\bTD \XXXDate \eTD}\eTR
}
\starttext
\bTABLE
\bTR \bTD Version \eTD \bTD Date \eTD \eTR
\MyMacro{Date=1.2.2005}
\MyMacro{Date=\doifmode{abc}{3.4.2005}} % this does not work
\MyMacro{Date=5.6.2005}
\eTABLE

This works, but it is not so nice:

\doifmodeelse{abc}{%
  \def\DateOne{1111}%
  \def\DateTwo{2222}%
  \def\DateThree{3333}}{%
  \def\DateOne{4444}%
  \def\DateTwo{5555}%
  \def\DateThree{6666}}

\bTABLE
\bTR \bTD Version \eTD \bTD Date \eTD \eTR
\MyMacro{Date=\DateOne}
\MyMacro{Date=\DateTwo}
\MyMacro{Date=\DateThree}
\eTABLE

\stoptext


Could you help please?

Cheers, Peter

-- 
http://pmrb.free.fr/contact/

Re: special macro problem again...

[Peter Münster]

It's a repost.
Does anybody have an idea to solve this problem?
If not, I'm going to buy the TeXbook...

I try to expose the problem a bit clearer:

\newcount\MyVersion
\def\MyMacro#1{%     This macro is somewhere in an environment file.
  \getgparameters[XXX][#1]
  \global\advance\MyVersion by 1
  \bTR \expanded{\bTD \the\MyVersion \eTD} \expanded{\bTD \XXXNumber \eTD}\eTR
}

\def\MyNumber#1#2#3{% This macro is a special one for the document.
  \doifmode{aaa}{#1}\doifmode{bbb}{#2}\doifmode{ccc}{#3}}

\enablemode[bbb]

\starttext
\bTABLE
\bTR \bTD Version \eTD \bTD Number \eTD \eTR
\MyMacro{Number=123}
\MyMacro{Number=\MyNumber{111}{222}{333}} % error: Incomplete \iffalse
\MyMacro{Number=456}
\eTABLE
\stoptext

Greetings, Peter

-- 
http://pmrb.free.fr/contact/

Re: special macro problem again...

[Taco Hoekwater]

Peter Münster wrote:
> It's a repost.
> Does anybody have an idea to solve this problem?
> If not, I'm going to buy the TeXbook...

This particular problem can be solved thus:

  \unexpanded\def\MyNumber#1#2#3{%
    \doifmode{aaa}{#1}\doifmode{bbb}{#2}\doifmode{ccc}{#3}}

There are some other syntactical possibilities, but the general
algorithm is always the same: making sure that the \expanded
within \MyMacro doesn't expand \doifmode, since \doifmode breaks
under pressure like that. You were not expected to know about that
(because this is undocumented), so you do not have to feel badly
about not owning a copy of the TeXbook. :-)

However, the TeXbook does explain the basic underlying problem,
and since the LaTeX Companion is not very helpful to ConTeXt
users <cough>, it is absolutely *the* book to buy.

Greetings, Taco


> I try to expose the problem a bit clearer:
> 
> \newcount\MyVersion
> \def\MyMacro#1{%     This macro is somewhere in an environment file.
>   \getgparameters[XXX][#1]
>   \global\advance\MyVersion by 1
>   \bTR \expanded{\bTD \the\MyVersion \eTD} \expanded{\bTD \XXXNumber \eTD}\eTR
> }
> 
> \def\MyNumber#1#2#3{% This macro is a special one for the document.
>   \doifmode{aaa}{#1}\doifmode{bbb}{#2}\doifmode{ccc}{#3}}
> 
> \enablemode[bbb]
> 
> \starttext
> \bTABLE
> \bTR \bTD Version \eTD \bTD Number \eTD \eTR
> \MyMacro{Number=123}
> \MyMacro{Number=\MyNumber{111}{222}{333}} % error: Incomplete \iffalse
> \MyMacro{Number=456}
> \eTABLE
> \stoptext
> 
> Greetings, Peter
> 

Re: special macro problem again...

[Peter Münster]

On Thu, 17 Mar 2005, Taco Hoekwater wrote:

> This particular problem can be solved thus:
> 
>   \unexpanded\def\MyNumber#1#2#3{%
>     \doifmode{aaa}{#1}\doifmode{bbb}{#2}\doifmode{ccc}{#3}}

Thank you very much!

> However, the TeXbook does explain the basic underlying problem,
> and since the LaTeX Companion is not very helpful to ConTeXt
> users <cough>, it is absolutely *the* book to buy.

Yes, you're right, and probably I'll buy it one day. My real problem is,
that on the one hand I'm interested in ConTeXt and TeX, but on the other
hand my job has nothing to do with it, so I cannot spend much time looking
deeper insight these programs. Documentation is good, but experience too!

Greetings, Peter

-- 
http://pmrb.free.fr/contact/