From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001 From: Norbert Preining Date: Mon, 2 Sep 2019 13:46:59 +0900 Subject: Initial commit --- info/examples/tip/optargx.tip | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 info/examples/tip/optargx.tip (limited to 'info/examples/tip/optargx.tip') diff --git a/info/examples/tip/optargx.tip b/info/examples/tip/optargx.tip new file mode 100644 index 0000000000..9928fa32cb --- /dev/null +++ b/info/examples/tip/optargx.tip @@ -0,0 +1,27 @@ +% 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 -- cgit v1.2.3