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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 11.3.1, p. II-72.
+% Original source in file "par2.TEX", starting line 1216.
+\wlog{L: "enumlist.tip" ["par2.TEX," l. 1216, p. II-72]}%
+% This file DOES belong to format "texip."
+\InputD{parv-1.tip}
+\InputD{counters.tip}
+\catcode`\@ = 11
+\newcount\@EnumerateListDepth
+\@EnumerateListDepth = 0
+\NewCounter{Enumerate1}{\arabic}%
+ {\TheCounter{Enumerate1}.}{\TheCounter{Enumerate1}}
+\NewCounter{Enumerate2}{\alph}%
+ {(\TheCounter{Enumerate2})}%
+ {\TheCounter{Enumerate1}.\TheCounter{Enumerate2}}
+\NewCounter{Enumerate3}{\roman}%
+ {\TheCounter{Enumerate3}.}%
+ {\RefCounter{Enumerate2}.\TheCounter{Enumerate3}}
+\NewCounter{Enumerate4}{\Alph}%
+ {\TheCounter{Enumerate4}.}%
+ {\RefCounter{Enumerate3}.\TheCounter{Enumerate4}}
+\def\BeginEnumerate{%
+ \begingroup
+ \global\advance\@EnumerateListDepth by 1
+ \ifcase\@EnumerateListDepth
+ \errmessage{\string\BeginEnumerate: no level
+ zero.}%
+ \or
+ \SetCounter{Enumerate1}{0}%
+ \@BeginEnumerateLevelOne
+ \def\Label ##1{\@Label{##1}{\RefCounter{Enumerate1}}{1}}%
+ \def\Item{%
+ \StepCounter{Enumerate1}%
+ \ItemLR{\PrintCounter{Enumerate1}}%
+ }%
+ \or
+ \SetCounter{Enumerate2}{0}%
+ \@BeginEnumerateLevelTwo
+ \def\Label ##1{\@Label{##1}{\RefCounter{Enumerate2}}{1}}%
+ \def\Item{%
+ \StepCounter{Enumerate2}%
+ \ItemLR{\PrintCounter{Enumerate2}}%
+ }%
+ \or
+ \SetCounter{Enumerate3}{0}%
+ \@BeginEnumerateLevelThree
+ \def\Label ##1{\@Label{##1}{\RefCounter{Enumerate3}}{1}}%
+ \def\Item{%
+ \StepCounter{Enumerate3}%
+ \ItemLR{\PrintCounter{Enumerate3}}%
+ }%
+ \or
+ \SetCounter{Enumerate4}{0}%
+ \@BeginEnumerateLevelFour
+ \def\Label ##1{\@Label{##1}{\RefCounter{Enumerate4}}{1}}%
+ \def\Item{%
+ \StepCounter{Enumerate4}%
+ \ItemLR{\PrintCounter{Enumerate4}}%
+ }%
+ \else
+ \errmessage{\string\BeginEnumerate: maximum
+ nesting level of 4 exceeded.}%
+ \fi
+}
+\def\EndEnumerate{%
+ \EndAList
+ \endgroup
+ \global\advance\@EnumerateListDepth by -1
+}
+\catcode`\@ = 12