% 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

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