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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 11.1.3.1, p. II-56.
% Original source in file "par2.TEX", starting line 411.
\wlog{L: "par-lab.tip" ["par2.TEX," l. 411, p. II-56]}%
% This file DOES NOT belong to format "texip."
\catcode`\@ = 11
\newdimen\Delta@XY
\newcount\@LabeledParNesting
\@LabeledParNesting = 0
\def\BeginAListX #1#2#3{% 
    \par
    \bgroup
    \advance\leftskip by #1
    \advance\rightskip by #2
    \advance\@LabeledParNesting by 1
    \message{\string\BeginAListX: nesting level:
        \the\@LabeledParNesting}%
    \@LabelCounter = 0
    \Delta@XY = #3
    \ifdim\Delta@XY < 0pt
        \message{\string\BeginAListX: negative Delta{xy},
            made positive.}%
    \fi
}
\def\EndAListX{% 
    \par
    \egroup
}
\def\ItemLL #1{%
    \par
    \noindent
    \hbox to 0pt{%
        \hskip -\Delta@XY
        #1%
        \hfil
    }%
    \ignorespaces
}
\def\ItemLR #1{%
    \par
    \noindent
    \hbox to 0pt{%
        \hss
        #1%
        \hskip\Delta@XY
    }%
    \ignorespaces
}
\def\ItemRL #1{%
    \par
    \noindent
    \hbox to 0pt{%
        \hskip\Delta@XY
        #1%
        \hss
    }%
    \ignorespaces
}
\def\ItemRR #1{%
    \par
    \noindent
    \hbox to 0pt{%
        \hfil
        #1%
        \hskip -\Delta@XY
    }%
    \ignorespaces
}
\catcode`\@ = 12