defining (new) macros with optional arguments

defining (new) macros with optional arguments

[Goebel, Juergen]

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Hi,

Does something like \newcommand exist in ConTeXt? 
My questions aims especially at the optional argument
with a predefined value.  So, how do I realize 

\newcommand{\test}[2][A]{foo}

with ConTeXt. In the fine manual I found an index entry
\definecommand, but in the 'rest' of the manual it was
never mentioned (print and screen version alike)!

Regards,

Juergen

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Re: defining (new) macros with optional arguments

[Thomas A. Schmitz]

On Sep 10, 2008, at 11:54 AM, Goebel, Juergen wrote:

> Hi,
>
> Does something like \newcommand exist in ConTeXt?
> My questions aims especially at the optional argument
> with a predefined value.  So, how do I realize
>
> \newcommand{\test}[2][A]{foo}
>
> with ConTeXt. In the fine manual I found an index entry
> \definecommand, but in the 'rest' of the manual it was
> never mentioned (print and screen version alike)!
>
> Regards,
>
> Juergen
>
No, we never define any commands... Err, in fact yes, sometimes we do.  
You want to read http://wiki.contextgarden.net/System_Macros ,  
especially http://wiki.contextgarden.net/System_Macros/Handling_Arguments

HTH

Thomas
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Re: defining (new) macros with optional arguments

[Wolfgang Schuster]

On Wed, Sep 10, 2008 at 12:26 PM, Thomas A. Schmitz
<thomas.schmitz@uni-bonn.de> wrote:
>
> On Sep 10, 2008, at 11:54 AM, Goebel, Juergen wrote:
>
>> Hi,
>>
>> Does something like \newcommand exist in ConTeXt?
>> My questions aims especially at the optional argument
>> with a predefined value.  So, how do I realize
>>
>> \newcommand{\test}[2][A]{foo}
>>
>> with ConTeXt. In the fine manual I found an index entry
>> \definecommand, but in the 'rest' of the manual it was
>> never mentioned (print and screen version alike)!
>>
>> Regards,
>>
>> Juergen
>>
> No, we never define any commands... Err, in fact yes, sometimes we do.
> You want to read http://wiki.contextgarden.net/System_Macros ,
> especially http://wiki.contextgarden.net/System_Macros/Handling_Arguments
>
> Thomas

http://wiki.contextgarden.net/Commands_with_optional_arguments

And we have also \define and \redefine but you can't use optional arguments
with them.

Wolfgang
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