On Tue, Oct 21, 2008 at 2:03 PM, Ruini Xue
Hans Hagen
writes: Ruini Xue wrote:
It's difficult to understand them from the code.
the first one issues a warning when no argument is given
You mean both of them ask the following \command to take two mandatory arguments? I try this example:
====================================== \def\test {\dodoubleargument\dotest} % use \dodoubleempty
\def\dotest[#1][#2]
You need a comment sign at the end of the line. \def\dotest[#1][#2]%
{\iffirstargument First arg: #1 \fi \ifsecondargument Second arg: #2 \fi}
\test[ok][ok] % 1. this is ok
\test [ok] [] % 2. warning?
This is just a empty argument.
\test [wrong] % 3. Error: lack one arg ==================================
both 1 and 2 can print "First arg" and "Second arg", so I am confused what's "no argument is given"
Wolfgang