% This macro source file is from the four volume series % "TeX in Practice" by Stephan von Bechtolsheim, published % 1993 by Springer-Verlag, New York. % Copyright 1993 Stephan von Bechtolsheim. % No warranty or liability is assumed. % This macro may be copied freely if no fees other than % media cost or shipping charges are charged and as long % as this copyright and the following source code itself % is not changed. Please see the series for further information. % % Version: 1.0 % Date: May 1, 1993 % % % This source code is documented in 23.4.5.1, p. III-260. % Original source in file "macros3.TEX", starting line 1219. \wlog{L: "optargx.tip" ["macros3.TEX," l. 1219, p. III-260]}% % This file DOES belong to format "texip." \InputD{futlet.tip} \catcode`\@ = 11 \def\OptArgX #1#2{% \let\@OptArgXTemp = #1% \def\@OptArgXDefault{[#2]}% \DoLongFutureLet{\ifx}{[}{\@OptArgXTemp}{\@OptArgXB}% } \def\@OptArgXB{\expandafter\@OptArgXTemp\@OptArgXDefault} \catcode`\@ = 12