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Diffstat (limited to 'info/examples/tip/droppre.tip')
-rw-r--r-- | info/examples/tip/droppre.tip | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/info/examples/tip/droppre.tip b/info/examples/tip/droppre.tip new file mode 100644 index 0000000000..8bbe74e790 --- /dev/null +++ b/info/examples/tip/droppre.tip @@ -0,0 +1,37 @@ +% 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 24.1.18.3, p. III-305. +% Original source in file "macros4.TEX", starting line 1230. +\wlog{L: "droppre.tip" ["macros4.TEX," l. 1230, p. III-305]}% +% This file DOES belong to format "texip." +\InputD{isprefix.tip} +\InputD{showx.tip} +\catcode`\@ = 11 +\def\DropPrefix #1#2#3{% + \if\PrefixConditional{#1}{#2}% + \edef\@PrefixConditionalTemp{% + \def\noexpand\@PrefixConditionalTempTwo #2####1% + \noexpand\@Del{% + \def\noexpand #3{####1}}% + }% + \@PrefixConditionalTemp + \ShowX{\@PrefixConditionalTemp}% + \expandafter\@PrefixConditionalTempTwo #1\@Del + \else + \wlog{\string\DropPrefix: "#2" is NOT a prefix of "#1"}% + \edef#3{#1}% + \fi +} +\catcode`\@ = 12 |