Hello ConTeXist.
I'm not able to solve a macros problem with one optional argument. I need the 
macro to return a value that can be used as a dorecurse loop parameter.
Is there possibility create macro with optional parameter and parameter is 
concurrently inside in braces? (in nonsquare brackets)?
I've tried to experiment with examples from the wiki, but I'm not clear about 
it.

Thanx for help.
Jaroslav Hajtmar

Here is minimal example:

\def\DoCommand[#1]%
  {\iffirstargument#1\else100\fi}

\def\Command%
  {\dosingleargument\DoCommand}

%\def\DoAnotherCommand{#1}%
%  {\iffirstargument#1\else100\fi}

%\def\AnotherCommand%
%  {\dosingleargument\DoAnotherCommand}

\starttext

1. \Command[5] % OK

2. \Command  % OK




%1. \dorecurse{\Command[5]}{\recurselevel\crlf} % not working

%2. \dorecurse{\Command}{\recurselevel\crlf}  % not working


\stoptext
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