Re: [NTG-context] How to extend an existing macro to take optional parameters?

On 14 Mar 2023, at 02:08, Alan Braslau via ntg-context wrote:

Designating "optional" parameters within [...] is a LaTeX notion. ConTeXt handles parameters differently.

Alan

Thanks Alan but I've never used LaTeX so I've no idea what the philosophical differences are. I wanted three mandatory and two optional params. One of those optional params is not typeset so I assumed it should be [ ] delimited and not { }.

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and I'd like to be able to extend it so that any of the following can be used:

\mycommand{aa}{bb}{cc} \mycommand{aa}{bb}{cc}{dd} \mycommand{aa}{bb}{cc}{dd}[ee]

or

\mycommand[ee]{aa}{bb}{cc}{dd} % if this is more the ConTeXt way

where {dd} is the optional extra parameter and, if it is present, then [ee] can also be optionally added (because it controls how {dd} is printed).

— Bruce Horrocks Hampshire, UK