[XeTeX] newcommand with optional arguments

[Sven Siegmund]

Sorry, but that does not work for me. It compiles ok, but does
something different.

when I define  \providecommand{\nuu}[2][]{\textit{#2} `#1'}

and write \nuu{mudi} the result is consequently mudi ''

But the thing is, that when I do not enter any optional argument I do
not want the word in italics being followed by any enquoted text nor
by the quotes alone.

I googled again and think I need to define the command another way.
Something like in 10.4 in here
(http://hevea.inria.fr/doc/manual020.html#toc37)

But I did not yet manage to change the source code to my demands. /-:

S.



2008/3/3, Ulrike Fischer <news2 at nililand.de>:
> Am Mon, 3 Mar 2008 12:25:27 +0100 schrieb Sven Siegmund:
>
>
>  > Hi,
>  >
>  > I need to define a command with an optional parameter.
>  >
>
> > \providecommand{\nuu}[1][1]{\textit{#2} `#1'} % all words of nuu write
>  > in this style
>
>
> > When I try to compile the document with xelatex, it complains:
>
>
> > ! Illegal parameter number in definition of \\nuu.
>  > <to be read again>
>  >                    2
>  > l.9 \providecommand{\nuu}[1][1]{\textit{#2} `#1'}
>  >                                               % all words of nuu write in th...
>  >
>  > What have I done wrong? I have tried to swap those number in the
>  > command definition, but he complains again the same way.
>
>
>  \providecommand{\nuu}[2][]{...}
>
>  The first [] contains the total number of argument. The second [] should
>  contain the default for the optional argument #1.
>
>
>  --
>  Ulrike Fischer
>
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