% 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 23.4.3, p. III-256. % Original source in file "macros3.TEX", starting line 1021. \wlog{L: "futlet.tip" ["macros3.TEX," l. 1021, p. III-256]}% % This file DOES belong to format "texip." \catcode`\@ = 11 \long\def\DoLongFutureLet #1#2#3#4{% \def\@FutureLetDecide{% #1#2\@FutureLetToken \def\@FutureLetNext{#3}% \else \def\@FutureLetNext{#4}% \fi \@FutureLetNext }% \futurelet\@FutureLetToken\@FutureLetDecide } \def\DoFutureLet #1#2#3#4{\DoLongFutureLet{#1}{#2}{#3}{#4}} \catcode`\@ = 12