[texhax] Defining a command which runs differently based ion input argument

Philipp Stephani st_philipp at yahoo.de
Tue Dec 28 12:19:02 CET 2010

Am 28.12.2010 um 12:00 schrieb Uwe Lueck:

> That is much worse with LaTeX's square brackets for optional arguments, as some scholars use square brackets for ellipsis or redactional insertions (I experienced this several times):
>    Title-like\\ % imitating the manuscript's line break and spacing
>    [unreadable] ipsum dolor sit amet

That would be fixed if \@ifnextchar didn't swallow space tokens. Similar problems arise with amsmath:

    [u] = [v]

That one is fixed by the mathtools package.

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