[texhax] How do you make * macros?

[Heiko Oberdiek]

On Fri, Oct 22, 2010 at 09:37:24AM -0400, Michael Barr wrote:

> Assuming I have a macro \xxx that does something, how do I make
> \xxx* that does something slightly different?  If think I make
> something using \@ifnextchar, but there is probably an "official"
> way of doing it that I don't see in the Companion (1994 edition).

\makeatletter
\newcommand*{\xxx}{%
  \@ifstar{\xxxWithStar}{\xxxWithoutStar}%
}
\makeatother
\newcommand{\xxxWithStar}...
\newcommand{\xxxWithoutStar}...

Other possibilities:
* Package `suffix'.
* ...

Yours sincerely
  Heiko Oberdiek