% 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 4.5.5, p. I-98. % Original source in file "reg2.TEX", starting line 987. \wlog{L: "swapbox.tip" ["reg2.TEX," l. 987, p. I-98]}% % This file DOES belong to format "texip." \catcode`\@ = 11 \newbox\@SwapBox \def\SwapBoxRegs #1#2{% \setbox\@SwapBox = \box#1% \setbox#1 = \box#2% \setbox#2 = \box\@SwapBox } \catcode`\@ = 12