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% 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
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