[XeTeX] newcommand with optional arguments

[Stephen Moye]

On Mar 3, 2008, at 6:25 AM, Sven Siegmund wrote:

> \providecommand{\nuu}[1][1]{\textit{#2} `#1'}

Try this:

\newcommand{\nuu}[2][]{%
	\textit{#2}\ %
	\ifx#1\empty
	\else
		`#1'
	\fi
}

The way this works is this:

\newcommand{\commandname}[<TOTAL number of args>][<default content of  
optional arg>]{<TeX commands...}

Where #1 is the optional argument

Your example needs something a little more complex, because your macro  
needs to determine if there is anything in the optional argument, and  
then to act accordingly.

You were on the right track...

Stephen Moye