[texhax] controlling expansion

[Michael Doob]

On 13-02-28 08:51 AM, Neal H. Walfield wrote:
> I spent some time reading and found a good solution for determining
> whether an argument is empty in David Solomon's Advanced TeXbook:
>
>    \ifx\empty#1\empty empty \else not empty\fi
>
> Nice trick!  TeX requires a lot of lateral thinking.

Cute, but what about \empty{\empty}? :-)

Cheers,
Michael


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Michael Doob                    Telephone: (204) 474-9796
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