source: doc/LaTeXmacros/enumitem/enumitem.sty @ 2a7b3ca

% +--------------------------------------------------+
% | Typeset enumitem.tex to get the documentation.   |
% +--------------------------------------------------+
%
% Copyright (c) 2003-2011 by Javier Bezos.
% All Rights Reserved.
%
% This file is part of the enumitem distribution release 3.5.2
% -----------------------------------------------------------
% 
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2003/12/01 or later.
% 
% This work has the LPPL maintenance status "maintained".
% 
% The Current Maintainer of this work is Javier Bezos.
%
% Notes
% ~~~~~
%
% The tag enit@ is used through the style
%
% To do:
% ~~~~~~
% - ref*, for adding stuff in the same fashion as label*
% - option ams, to force upshape, but I have to investigate
% how to do it.
% - labelled descriptions (ie, label, title, body)
% - A true nextline (far from trivial and perhaps solved with
%   labelled descriptions).
% - Improved \AddEnumerateCounter
% - Compatibility with interfaces and zref-enumitem
% - "Pausing" somehow inline boxed text.
% - \@enumctr <-> \@listctr?
% - Define keys with values
% - Revise @nobreak
%
% Release
% ~~~~~~~

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{enumitem}[2011/09/28 v3.5.2 Customized lists]

% +=============================+
% |      EMULATING KEYVAL       |
% +=============================+
%
% "Thanks" to xkeyval, which use the same macros names as
% keyval :-(, the latter has to be replicated in full here
% to ensure it works as intended. The original work if by
% David Carlisle, under license LPPL. Once the code is here,
% it could be optimized by adpting it to the specific needs
% of titlesec (to do).

\def\enitkv@setkeys#1#2{%
  \def\enitkv@prefix{enitkv@#1@}%
  \let\@tempc\relax
  \enitkv@do#2,\relax,}

\def\enitkv@do#1,{%
 \ifx\relax#1\empty\else
  \enitkv@split#1==\relax
  \expandafter\enitkv@do\fi}

\def\enitkv@split#1=#2=#3\relax{%
  \enitkv@@sp@def\@tempa{#1}%
  \ifx\@tempa\@empty\else
    \expandafter\let\expandafter\@tempc
      \csname\enitkv@prefix\@tempa\endcsname
    \ifx\@tempc\relax
      \enitkv@errx{\@tempa\space undefined}%
    \else
      \ifx\@empty#3\@empty
        \enitkv@default
      \else
        \enitkv@@sp@def\@tempb{#2}%
        \expandafter\@tempc\expandafter{\@tempb}\relax
      \fi
    \fi
  \fi}

\def\enitkv@default{%
  \expandafter\let\expandafter\@tempb
    \csname\enitkv@prefix\@tempa @default\endcsname
  \ifx\@tempb\relax
    \enitkv@err{No value specified for \@tempa}%
  \else
    \@tempb\relax
  \fi}

\def\enitkv@errx#1{\enit@error{#1}\@ehc}

\let\enitkv@err\enitkv@errx

\def\@tempa#1{%
  \def\enitkv@@sp@def##1##2{%
    \futurelet\enitkv@tempa\enitkv@@sp@d##2\@nil\@nil#1\@nil\relax##1}%
  \def\enitkv@@sp@d{%
    \ifx\enitkv@tempa\@sptoken
      \expandafter\enitkv@@sp@b
    \else
      \expandafter\enitkv@@sp@b\expandafter#1%
    \fi}%
  \def\enitkv@@sp@b#1##1 \@nil{\enitkv@@sp@c##1}}

\@tempa{ }

\def\enitkv@@sp@c#1\@nil#2\relax#3{\enitkv@toks@{#1}\edef#3{\the\enitkv@toks@}}

\@ifundefined{KV@toks@}
   {\newtoks\enitkv@toks@}
   {\let\enitkv@toks@\KV@toks@}

\def\enitkv@key#1#2{%
  \@ifnextchar[{\enitkv@def{#1}{#2}}{\@namedef{enitkv@#1@#2}####1}}

\def\enitkv@def#1#2[#3]{%
  \@namedef{enitkv@#1@#2@default\expandafter}\expandafter
    {\csname enitkv@#1@#2\endcsname{#3}}%
  \@namedef{enitkv@#1@#2}##1}

% +=============================+
% |        DEFINITIONS          |
% +=============================+
%
% (1) The package uses a token register very often. To be on the
%   safe side, instead of \toks@, etc., a new one is declared.
% (2) \enit@inbox is the box storing the items in boxed inline
%   lists.
% (3) \enit@outerparindent is used to save the outer parindent 
%   so that it can be used in the key parindent 
% (4) \enit@type has three values: 0 = enum, 1 = item, 2 = desc.
% (5) \enit@calc stores which dimen is to be computed:
%   0=labelindent, 1=labelwidth, 2=labelsep, 3=leftmargin,
%   4=itemindent
% (6) \enit@resuming has four values: 0 = none, 1 = series,
%   2 = resume* series (computed in group enumitem-resume),
%   3 = resume* list (ie, with no value).

\chardef  \enit@iv=4
\newlength\labelindent
\newdimen \enit@outerparindent
\newtoks  \enit@toks
\newbox   \enit@inbox

\newif\ifenit@boxmode
\newif\ifenit@sepfrommargin
\newif\ifenit@lblfrommargin
\newif\ifenit@calcwidest
\newif\ifenit@nextline
\newif\ifenit@boxdesc

% An alias (calc-savvy):

\let\c@enit@cnt\@tempcnta

\def\enit@meaning{\expandafter\strip@prefix\meaning}
\def\enit@noexcs#1{\expandafter\noexpand\csname#1\endcsname}

% Miscelaneous errors
% ===================

\def\enit@error{\PackageError{enumitem}}
  
\def\enit@checkerror#1#2{%
  \enit@error{Unknown value `#2' for key `#1'}%
      {See the manual for valid values}} 

\def\enit@itemerror{%
  \enit@error{Misplaced \string\item}%
      {Either there is some text before the first\MessageBreak
       item or the last item has no text}} 

\def\enit@noserieserror#1{%
  \enit@error{Series `#1' not started}%
      {You are trying to continue a series\MessageBreak
       which has not been started with series}} 

\def\enit@checkseries#1{%
  \ifcase\enit@resuming
    \enit@error{Misplaced key `#1'}%
      {`series' and `resume*' must be used\MessageBreak
       in the optional argument of lists}%
  \fi}

\def\enit@checkseries@m{%
  \ifcase\enit@resuming\else
    \enit@error{Uncompatible series settings}%
      {`series' and `resume*' must not be used\MessageBreak
       at the same time}%
  \fi}

\let\enit@toodeep\@toodeep

\def\@toodeep{%
  \ifnum\@listdepth>\enit@listdepth\relax
    \enit@toodeep
  \else
    \count@\@listdepth
    \global\advance\@listdepth\@ne
    \@ifundefined{@list\romannumeral\the\@listdepth}%
      {\expandafter\let
         \csname @list\romannumeral\the\@listdepth\expandafter\endcsname
         \csname @list\romannumeral\the\count@\endcsname}{}%
  \fi}


% +=============================+
% |            KEYS             |
% +=============================+
%
% Including code executed by keys.
%
% There are 2 keyval groups: enumitem, and enumitem-delayed.
% The latter is used to make sure a prioritary key is the
% latest one; eg, ref, so that the ref format set by label
% is overriden. So, when this key is found in enumitem,
% nothing is done, except the key/value is moved to 
% enumitem-delayed.
%
% A further group (enumitem-resume) catches resume* and
% series in optional arguments in lists.
%
% Vertical spacing
% ================

\enitkv@key{enumitem}{topsep}{%
  \setlength\topsep{#1}}

\enitkv@key{enumitem}{itemsep}{%
  \setlength\itemsep{#1}}

\enitkv@key{enumitem}{parsep}{%
  \setlength\parsep{#1}}

\enitkv@key{enumitem}{partopsep}{%
  \setlength\partopsep{#1}}

% Horizontal spacing
% ==================
%
% There are 3 cases: *, ! and a value. The latter also
% cancels widest with the sequence key=* ... key=value
% \string is used, just in case some package changes the
% catcodes.

\def\enit@calcset#1#2#3{%
  \if\string*\string#3%
    \enit@calcwidesttrue
    \let\enit@calc#2%
  \else\if\string!\string#3%
    \enit@calcwidestfalse
    \let\enit@calc#2%
  \else
    \ifnum\enit@calc=#2%
      \enit@calcwidestfalse
      \let\enit@calc\z@
    \fi
    \setlength#1{#3}%
  \fi\fi}

\def\enitkv@enumitem@widest#1{%
  \expandafter\let\csname enit@cw@\@enumctr\endcsname\relax
  \@namedef{enit@widest@\@enumctr}##1{#1}}

\def\enitkv@enumitem@widest@default{%
  \expandafter\let\csname enit@cw@\@enumctr\endcsname\relax
  \expandafter\let\csname enit@widest@\@enumctr\endcsname\relax}

\enitkv@key{enumitem}{widest*}{%
  \setcounter{enit@cnt}{#1}%
  \expandafter\edef\csname enit@cw@\@enumctr\endcsname
    {\the\c@enit@cnt}%
  \expandafter\edef\csname enit@widest@\@enumctr\endcsname##1%
    {##1{\the\c@enit@cnt}}}

\enitkv@key{enumitem}{labelindent*}{%
  \enit@lblfrommargintrue
  \ifnum\enit@calc=\z@
    \enit@calcwidestfalse
  \fi
  \setlength\labelindent{#1}%
  \advance\labelindent\leftmargin}

\enitkv@key{enumitem}{labelindent}{%
  \enit@lblfrommarginfalse
  \enit@calcset\labelindent\z@{#1}}

\enitkv@key{enumitem}{labelwidth}{%
  \enit@calcset\labelwidth\@ne{#1}}

\enitkv@key{enumitem}{leftmargin}{%
  \edef\enit@c{\the\leftmargin}%
  \enit@calcset\leftmargin\thr@@{#1}%
  \ifenit@lblfrommargin
    \advance\labelindent-\enit@c\relax
    \advance\labelindent\leftmargin
  \fi}

\enitkv@key{enumitem}{itemindent}{%
  \edef\enit@c{\the\itemindent}%
  \enit@calcset\itemindent\enit@iv{#1}%
  \ifenit@sepfrommargin
    \advance\labelsep-\enit@c\relax
    \advance\labelsep\itemindent
  \fi}

\enitkv@key{enumitem}{listparindent}{%
  \setlength\listparindent{#1}}

\enitkv@key{enumitem}{rightmargin}{%
  \setlength\rightmargin{#1}}

% labelsep, from itemindent; labelsep*, from leftmargin

\enitkv@key{enumitem}{labelsep*}{%
  \enit@sepfrommargintrue
  \ifnum\enit@calc=\tw@
    \enit@calcwidestfalse
    \let\enit@calc\z@
  \fi
  \setlength\labelsep{#1}%
  \advance\labelsep\itemindent}

\enitkv@key{enumitem}{labelsep}{%
  \enit@sepfrommarginfalse
  \enit@calcset\labelsep\tw@{#1}}

% Series, resume and start
% ========================

\enitkv@key{enumitem-resume}{series}{%
  \enit@checkseries@m
  \let\enit@resuming\@ne
  \@ifundefined{enitkv@enumitem@#1}{}%
    {\enit@error{Invalid series name `#1'}%
       {Do not name a series with an existing key}}%
  \def\enit@series{#1}}

\enitkv@key{enumitem}{series}{%
  \enit@checkseries{series}}

\def\enitkv@enumitem@resume#1{%
  \edef\enit@series{#1}%
  \@nameuse{enit@resume@series@#1}\relax}

\def\enitkv@enumitem@resume@default{%
  \@nameuse{enit@resume@\@currenvir}\relax}
  
\@namedef{enitkv@enumitem-resume@resume*}#1{%
  \enit@checkseries@m
  \let\enit@resuming\tw@
  \edef\enit@series{#1}%
  \@ifundefined{enit@resumekeys@series@#1}%
    {\enit@noserieserror{#1}}%
    {\expandafter\let\expandafter\enit@resumekeys
         \csname enit@resumekeys@series@#1\endcsname}}

\@namedef{enitkv@enumitem-resume@resume*@default}{%
  \let\enit@resuming\thr@@
  \expandafter\let\expandafter\enit@resumekeys
    \csname enit@resumekeys@\@currenvir\endcsname
  \@nameuse{enit@resume@\@currenvir}\relax}

\enitkv@key{enumitem}{resume*}[]{%
  \enit@checkseries{resume*}}

\newcommand\restartlist[1]{%
  \@ifundefined{end#1}%
    {\enit@error{Undefined list `#1'}%
      {No list has been defined with that name.}}%
    {\expandafter\let
     \csname enit@resume@#1\endcsname\@empty}}

\enitkv@key{enumitem}{start}[\@ne]{%
  \setcounter{\@listctr}{#1}%
  \advance\@nameuse{c@\@listctr}\m@ne}

% Penalties
% =========
  
\enitkv@key{enumitem}{beginpenalty}{%
  \@beginparpenalty#1\relax}
  
\enitkv@key{enumitem}{midpenalty}{%
  \@itempenalty#1\relax}

\enitkv@key{enumitem}{endpenalty}{%
  \@endparpenalty#1\relax}
   
% Font/Format
% ===========

\enitkv@key{enumitem}{format}{%
  \def\enit@format{#1}}

\enitkv@key{enumitem}{font}{%
  \def\enit@format{#1}}

% Description styles
% ==================

\enitkv@key{enumitem}{style}[normal]{%
  \@ifundefined{enit@style@#1}%
    {\enit@checkerror{style}{#1}}%
    {\enit@nextlinefalse
     \enit@boxdescfalse
     \@nameuse{enit@style@#1}%
     \edef\enit@descstyle{\enit@noexcs{enit@#1style}}}}

\def\enit@style@standard{%
  \enit@boxdesctrue
  \enit@calcset\itemindent\enit@iv!}

\let\enit@style@normal\enit@style@standard

\def\enit@style@unboxed{%
  \enit@calcset\itemindent\enit@iv!}

\def\enit@style@sameline{%
  \enit@calcset\labelwidth\@ne!}

\def\enit@style@multiline{%
  \enit@align@parleft
  \enit@calcset\labelwidth\@ne!}

\def\enit@style@nextline{%
  \enit@nextlinetrue
  \enit@calcset\labelwidth\@ne!}

% Labels and refs
% ===============

% Aligment
% --------

\enitkv@key{enumitem}{align}{%
  \@ifundefined{enit@align@#1}%
    {\enit@checkerror{align}{#1}}%
    {\csname enit@align@#1\endcsname}}

% \nobreak for unboxed label with color. See below.

\newcommand\SetLabelAlign[2]{%
  \enit@toks{#2}%
  \expandafter\edef\csname enit@align@#1\endcsname
    {\def\noexpand\enit@align####1{\nobreak\the\enit@toks}}}

\def\enit@align@right{%
  \def\enit@align##1{\nobreak\hss\llap{##1}}}

\def\enit@align@left{%
  \def\enit@align##1{\nobreak##1\hfil}}

\def\enit@align@parleft{%
  \def\enit@align##1{%
    \nobreak
    \strut\smash{\parbox[t]\labelwidth{\raggedright##1}}}}

% \enit@ref has three possible definitions:
% (1) \relax, if there is neither label nor ref (ie, use
%   LaTeX settings).
% (2) set ref to @itemlabel, if there is label but not ref
% (3) set ref to ref, if there is ref (with or without label)

\enitkv@key{enumitem}{label}{%
  \expandafter\def\@itemlabel{#1}%
  \def\enit@ref{\expandafter\enit@reflabel\@itemlabel\z@}}

\enitkv@key{enumitem}{label*}{%
  \ifnum\enit@depth=\@ne
    \expandafter\def\@itemlabel{#1}%
  \else % no level 0
    \advance\enit@depth\m@ne
    \enit@toks{#1}%
    \expandafter\edef\@itemlabel{%
      \enit@noexcs{label\enit@prevlabel}%
      \the\enit@toks}%
    \advance\enit@depth\@ne  
  \fi
  \def\enit@ref{\expandafter\enit@reflabel\@itemlabel\z@}}

% ref is set by label, except if there is an explicit ref
% in the same hierarchy level. Explicit refs above the
% current hierarchy level are overriden by label (besides ref),
% too. Since an explicit ref has preference, it's delayed.
  
\enitkv@key{enumitem}{ref}{%
  \g@addto@macro\enit@delayedkeys{,ref=#1}}

\enitkv@key{enumitem-delayed}{ref}{%
  \def\enit@ref{\enit@reflabel{#1}\@ne}}

% #2=0 don't "normalize" (ie, already normalized)
%   =1 "normalize" (in key ref)
% Used thru \enit@ref

\def\enit@reflabel#1#2{%
  \ifnum\enit@depth=\@ne\else % no level 0
    \advance\enit@depth\@ne
    \@namedef{p@\@enumctr}{}% Don't accumulate labels
    \advance\enit@depth\m@ne
  \fi
  \ifcase#2%
    \@namedef{the\@enumctr}{{#1}}%
  \else
    \enit@normlabel{\csname the\@enumctr\endcsname}{#1}%
  \fi}

% \xxx* in counters (refstar) and widest (calcdef)
% ------------------------------------------------
% \enit@labellist contains a list of
% \enit@elt{widest}\count\@count\enit@sc@@count
% \enit@elt is either \enit@getwidth or \enit@refstar, defined
% below
% The current implementation is sub-optimal -- labels are stored in 
% labellist, counters defined again when processing labels, and
% modifying it is almost impossible.

\let\enit@labellist\@empty 

\newcommand\AddEnumerateCounter{%
  \@ifstar\enit@addcounter@s\enit@addcounter}

\def\enit@addcounter#1#2#3{%
  \enit@toks\expandafter{%
    \enit@labellist
    \enit@elt{#3}}%
  \edef\enit@labellist{%
    \the\enit@toks
    \enit@noexcs{\expandafter\@gobble\string#1}%
    \enit@noexcs{\expandafter\@gobble\string#2}%
    \enit@noexcs{enit@sc@\expandafter\@gobble\string#2}}}

\def\enit@addcounter@s#1#2#3{%
  \enit@addcounter{#1}{#2}%
    {\@nameuse{enit@sc@\expandafter\@gobble\string#2}{#3}}}

% The 5 basic counters:

\AddEnumerateCounter\arabic\@arabic{0}
\AddEnumerateCounter\alph\@alph{m}
\AddEnumerateCounter\Alph\@Alph{M}
\AddEnumerateCounter\roman\@roman{viii}
\AddEnumerateCounter\Roman\@Roman{VIII}

% Inline lists
% ============
%
% Labels
% ------

\enitkv@key{enumitem}{itemjoin}{%
  \def\enit@itemjoin{#1}}

\enitkv@key{enumitem}{itemjoin*}{%
  \def\enit@itemjoin@s{#1}}

\enitkv@key{enumitem}{afterlabel}{%
  \def\enit@afterlabel{#1}}

% Mode
% ----

\enitkv@key{enumitem}{mode}{%
  \@ifundefined{enit@mode#1}%
    {\enit@checkerror{mode}{#1}}%
    {\csname enit@mode#1\endcsname}}

\let\enit@modeboxed\enit@boxmodetrue
\let\enit@modeunboxed\enit@boxmodefalse

% Short Labels
% ============

\let\enit@marklist\@empty

% shorthand, expansion:

\newcommand\SetEnumerateShortLabel[2]{%
  \let\enit@a\@empty
  \def\enit@elt##1##2{%
    \def\enit@b{#1}\def\enit@c{##1}%
    \ifx\enit@b\enit@c\else
      \expandafter\def\expandafter\enit@a\expandafter{%
        \enit@a
        \enit@elt{##1}{##2}}%
    \fi}%
  \enit@marklist
  \expandafter\def\expandafter\enit@a\expandafter{%
    \enit@a
    \enit@elt{#1}{#2}}%
  \let\enit@marklist\enit@a}

\SetEnumerateShortLabel{a}{\alph*}
\SetEnumerateShortLabel{A}{\Alph*}
\SetEnumerateShortLabel{i}{\roman*}
\SetEnumerateShortLabel{I}{\Roman*}
\SetEnumerateShortLabel{1}{\arabic*}

% This is called \enit@first one,two,three,\@nil\@@nil. If there
% are just one element #2 is \@nil, otherwise we have to remove
% the trailing ,\@nil with enit@first@x
% Called with the keys in \enit@c
% Returns enit@toks

\def\enit@first#1,#2\@@nil{%
  \in@{=}{#1}% Quick test, if contains =, it's key=value
  \ifin@\else
    \enitkv@@sp@def\enit@a{#1}%
    \@ifundefined{enitkv@enumitem@\enit@meaning\enit@a}%
      {\ifnum\enit@type=\z@
         \def\enit@elt{\enit@replace\enit@a}%
         \enit@marklist % Returns \enit@toks
       \else
         \enit@toks{#1}%
       \fi
       \ifx\@nil#2%
         \ifx,#1,\else
           \edef\enit@c{label=\the\enit@toks}%
         \fi
       \else
         \@temptokena\expandafter{\enit@first@x#2}%
         \edef\enit@c{label=\the\enit@toks,\the\@temptokena}%
       \fi}%
     {}%
  \fi
  \enit@toks\expandafter{\enit@c}}

\def\enit@first@x#1,\@nil{#1}

\def\enit@replace#1#2#3{%
  \enit@toks{}%
  \def\enit@b##1#2##2\@@nil{%
    \ifx\@nil##2%
      \addto@hook\enit@toks{##1}%
    \else
      \edef\enit@a{\the\enit@toks}%
      \ifx\enit@a\@empty\else
        \enit@error{Extra short label ignored}%
           {There are more than one short label}%
      \fi
      \addto@hook\enit@toks{##1#3}%
      \enit@b##2\@@nil
    \fi}%
  \expandafter\enit@b#1#2\@nil\@@nil
  \edef#1{\the\enit@toks}}

% Pre and post code
% =================

\enitkv@key{enumitem}{before}{%
  \def\enit@before{#1}}

\enitkv@key{enumitem}{after}{%
  \def\enit@after{#1}}

\enitkv@key{enumitem}{before*}{%
  \expandafter\def\expandafter\enit@before\expandafter
    {\enit@before#1}}

\enitkv@key{enumitem}{after*}{%
  \expandafter\def\expandafter\enit@after\expandafter
    {\enit@after#1}}

% Miscelaneous keys
% ================
  
\enitkv@key{enumitem}{nolistsep}[true]{%
  \partopsep=\z@skip
  \topsep=\z@ plus .1pt
  \itemsep=\z@skip
  \parsep=\z@skip}

\enitkv@key{enumitem}{nosep}[true]{%
  \partopsep=\z@skip
  \topsep=\z@skip
  \itemsep=\z@skip
  \parsep=\z@skip}


\enitkv@key{enumitem}{noitemsep}[true]{%
  \itemsep=\z@skip
  \parsep=\z@skip}

\enitkv@key{enumitem}{wide}[\parindent]{%
  \enit@align@left
  \leftmargin\z@
  \labelwidth\z@
  \setlength\labelindent{#1}%
  \listparindent\labelindent
  \enit@calcset\itemindent\enit@iv!}

% The following is deprecated in favour of wide:

\enitkv@key{enumitem}{fullwidth}[true]{%
  \leftmargin\z@
  \labelwidth\z@
  \def\enit@align##1{\hskip\labelsep##1}}

% "Abstract" layer
% ================
%
% Named values
% ------------

\newcommand\SetEnumitemValue[2]{% Implicit #3
  \@ifundefined{enit@enitkv@#1}%
    {\@ifundefined{enitkv@enumitem@#1}%
       {\enit@error{Wrong key `#1' in \string\SetEnumitemValue}%
          {Perhaps you have misspelled it}}{}%
     \expandafter\let\csname enit@enitkv@#1\expandafter\endcsname
       \csname enitkv@enumitem@#1\endcsname}{}%
  \@namedef{enitkv@enumitem@#1}##1{%
    \def\enit@a{##1}%
    \@ifundefined{enit@enitkv@#1@\enit@meaning\enit@a}%
      {\@nameuse{enit@enitkv@#1}{##1}}%
      {\@nameuse{enit@enitkv@#1\expandafter\expandafter\expandafter}%
         \expandafter\expandafter\expandafter
         {\csname enit@enitkv@#1@##1\endcsname}}{}}%
  \@namedef{enit@enitkv@#1@#2}}

% Defining keys
% -------------

\newcommand\SetEnumitemKey[2]{%
  \@ifundefined{enitkv@enumitem@#1}%
    {\enitkv@key{enumitem}{#1}[]{\enitkv@setkeys{enumitem}{#2}}}%
    {\enit@error{Duplicated key `#1' in \string\SetEnumitemKey}%
       {There already exists a key with that name}}}

% +=============================+
% |       PROCESSING KEYS       |
% +=============================+
%
% Set keys
% ========

\def\enit@setkeys#1{%
  \@ifundefined{enit@@#1}{}%
    {\expandafter\expandafter\expandafter
     \enit@setkeys@i\csname enit@@#1\endcsname\@@}}

% The following is used directly in resumeset:

\def\enit@setkeys@i#1\@@{%
  \let\enit@delayedkeys\@empty
  \enit@shl{#1}% is or returns \enit@toks
  \expandafter\enit@setkeys@ii\the\enit@toks\@@}

\def\enit@setkeys@ii#1\@@{%
  \enitkv@setkeys{enumitem}{#1}%
  \enit@toks\expandafter{\enit@delayedkeys}%
  \edef\enit@a{%
    \noexpand\enitkv@setkeys{enumitem-delayed}{\the\enit@toks}}%
  \enit@a}

% Handling * and ! values
% =======================
%
% \@gobbletwo removes \c from \c@counter.

\def\enit@getwidth#1#2#3#4{%
  \let#4#3%
  \def#3##1{%
    \@ifundefined{enit@widest\expandafter\@gobbletwo\string##1}% if no widest=key
      {#1}%
      {\csname enit@widest\expandafter\@gobbletwo\string##1\endcsname{#4}}}}

\def\enit@valueerror#1{\z@ % if after an assignment, but doesn't catch \ifnum
   \enit@error{No default \string\value\space for `#1'}%
     {You can provide one with widest*}}%

\let\enit@values\@empty

\def\enit@calcwidth{%
  \ifenit@calcwidest
    \ifnum\enit@type=\z@ % ie, enum
      \@ifundefined{enit@cw@\@enumctr}%
        {\@namedef{enit@cv@\@enumctr}{\enit@valueerror\@enumctr}}%
        {\edef\enit@values{%
           \enit@values
           \@nameuse{c@\@enumctr}\@nameuse{enit@cw@\@enumctr}\relax}%
         \expandafter
         \edef\csname enit@cv@\@enumctr\endcsname
           {\@nameuse{c@\@enumctr}}}%
    \fi
    \begingroup
      \enit@values
      \def\value##1{\csname enit@cv@##1\endcsname}%
      \let\enit@elt\enit@getwidth
      \enit@labellist
      \settowidth\labelwidth{\@itemlabel}%
      \xdef\enit@a{\labelwidth\the\labelwidth\relax}%
    \endgroup
    \enit@a
  \fi
  \advance\dimen@-\labelwidth}

\def\enit@calcleft{%
  \dimen@\leftmargin
  \advance\dimen@\itemindent
  \advance\dimen@-\labelsep
  \advance\dimen@-\labelindent
  \ifcase\enit@calc % = 0 = labelindent
    \enit@calcwidth
    \advance\labelindent\dimen@
  \or % = 1 = labelwidth, so no \enit@calcwidth
    \labelwidth\dimen@
  \or % = 2 = labelsep
    \enit@calcwidth
    \advance\labelsep\dimen@
  \or % = 3 = leftmargin
    \enit@calcwidth
    \advance\leftmargin-\dimen@
  \or % = 4 =itemindent
    \enit@calcwidth
    \advance\itemindent-\dimen@
  \fi}

% "Normalizing" labels
% ====================
%
% Replaces \counter* by \counter{level} (those in \enit@labellist).
%
% #1 is either \csname...\endcsmame or the container \@itemlabel --
% hence \expandafter

\def\enit@refstar@i#1#2{%
  \if*#2\@empty
    \noexpand#1{\@enumctr}%
  \else
    \noexpand#1{#2}%
  \fi}%

\def\enit@refstar#1#2#3#4{%
  \def#2{\enit@refstar@i#2}%
  \def#3{\enit@refstar@i#3}}

\def\enit@normlabel#1#2{%
  \begingroup
    \def\value{\enit@refstar@i\value}%
    \let\enit@elt\enit@refstar
    \enit@labellist
    \protected@xdef\enit@a{{#2}}% Added braces as \ref is in the 
  \endgroup
  \expandafter\let#1\enit@a}                    % global scope. 

% Preliminary settings and default values
% =======================================

\def\enit@prelist#1#2#3{%
  \let\enit@type#1%
  \def\enit@depth{#2}%
  \edef\enit@prevlabel{#3\romannumeral#2}%
  \advance#2\@ne}
     
\def\enit@preset#1#2#3{%
   \enit@sepfrommarginfalse
   \enit@calcwidestfalse
   \let\enit@resuming\z@
   \let\enit@series\relax
   \enit@boxmodetrue
   \def\enit@itemjoin{ }%
   \let\enit@itemjoin@s\relax
   \let\enit@afterlabel\nobreakspace
   \let\enit@before\@empty
   \let\enit@after\@empty
   \let\enit@format\@firstofone % and NOT empty
   \let\enit@ref\relax
   \labelindent\z@skip
   \ifnum\@listdepth=\@ne
     \enit@outerparindent\parindent
   \else
     \parindent\enit@outerparindent
   \fi
   \enit@setkeys{list}%
   \enit@setkeys{list\romannumeral\@listdepth}%
   \enit@setkeys{#1}%
   \enit@setkeys{#1\romannumeral#2}%
   \enit@setresume{#3}}

% keyval "error" in enumitem-resume: all undefined keys (ie, all
% except resume*) are ignored, but <series> is treated like
% resume*=<series>

\def\enitkv@err@a#1{%
   \@ifundefined{enit@resumekeys@series@\@tempa}{}%
     {\@nameuse{enitkv@enumitem-resume@resume*\expandafter}%
        \expandafter{\@tempa}}}

% keyval "error" in the optional argument: all undefined keys are
% passed to the keyval error, but <series> is ignored (already
% processed in enumitem-resume

\def\enitkv@err@b#1{%
   \@ifundefined{enit@resumekeys@series@\@tempa}%
     {\enit@savekverr{#1}}%
     {}}

% Process keys in optional argument:

\def\enit@setresume#1{%
  \enit@shl{#1}% Returns enit@toks
  \edef\enit@savekeys{\the\enit@toks}%
  \let\enit@savekverr\enitkv@errx
  \let\enitkv@errx\enitkv@err@a
  \edef\enit@b{%
    \noexpand\enitkv@setkeys{enumitem-resume}{\the\enit@toks}}%
  \enit@b
  \let\enitkv@errx\enitkv@err@b
  \ifcase\enit@resuming\or\or % = 2
    \expandafter
    \enit@setkeys@i\enit@resumekeys,resume=\enit@series\@@
  \or % = 3
    \expandafter
    \enit@setkeys@i\enit@resumekeys,resume\@@
  \fi
  \expandafter\enit@setkeys@i\enit@savekeys\@@
  \let\enitkv@errx\enit@savekverr}

% +=============================+
% |         LIST TYPES          |
% +=============================+
%
% Displayed lists
% ===============
% #1 #2 implicit

\def\enit@dylist{%
  \enit@align@right
  \list}

\def\enit@endlist{%
  \enit@after
  \endlist
  \ifx\enit@series\relax\else % discards resume*, too
    \ifnum\enit@resuming=\@ne % ie, series=
      \enit@setresumekeys{series@\enit@series}\global\global
    \else % ie, resume=, resume*= (save count, but not keys)
      \enit@setresumekeys{series@\enit@series}\@gobblefour\global
    \fi
    \enit@afterlist
  \fi
  \ifnum\enit@resuming=\thr@@ % ie, resume* list (save count only)
    \enit@setresumekeys\@currenvir\@gobblefour\global
  \else
    \enit@setresumekeys\@currenvir\@empty\@empty
  \fi
  \aftergroup\enit@afterlist}

% #1 = either \@currenvir or series@<series>
% #2(keys) #3(counter) are \global, \@gobblefour or \@empty

\def\enit@setresumekeys#1#2#3{%
  \enit@toks\expandafter{\enit@savekeys}%
  \xdef\enit@afterlist{%
    #2\def\enit@noexcs{enit@resumekeys@#1}{\the\enit@toks}%
    \ifnum\enit@type=\z@ % ie, enum
      #3\def\enit@noexcs{enit@resume@#1}{%
        \csname c@\@listctr\endcsname
        \the\csname c@\@listctr\endcsname}%
    \fi}}

% Inline lists
% ============

% Definition of \@trivlist inside inline lists.  So, when
% \@trivlist is found in any displayed list (including quote,
% center, verbatim...) the default \@item is restored.

\def\enit@intrivlist{%
  \enit@changed@itemfalse
  \let\@item\enit@outer@item
  \let\par\@@par
  \let\@trivlist\enit@outer@triv
  \@trivlist}

% Keep track of \@item and \item changes

\newif\ifenit@changed@item
\enit@changed@itemfalse

\newif\ifenit@changeditem
\enit@changeditemfalse

% List
% ----

% Arguments, as before:
% \enitdp@<name>, <name>, <max-depth>, <format>
% About @newlist, see @initem.

\def\enit@inlist#1#2{%
  \ifnum\@listdepth>\enit@listdepth\relax
    \@toodeep
  \else
    \global\advance\@listdepth\@ne
  \fi
  \let\enit@align\@firstofone
  \def\@itemlabel{#1}%
  \@nmbrlistfalse
  \ifenit@changed@item\else
    \enit@changed@itemtrue
    \let\enit@outer@triv\@trivlist
    \let\@trivlist\enit@intrivlist
    \@setpar\@empty
    \let\enit@outer@item\@item
  \fi
  #2\relax
  \global\@newlisttrue
  \ifenit@boxmode
    \ifenit@changeditem\else
      \enit@changeditemtrue
      \let\enit@outeritem\item
    \fi
    \let\@item\enit@boxitem
  \else
    \let\@item\enit@noboxitem
    \ifx\enit@itemjoin@s\relax\else
      \PackageWarning{enumitem}%
         {itemjoin* discarded in mode unboxed\MessageBreak}%
    \fi
  \fi
  \let\enit@calcleft\relax
  \let\enit@afteritem\relax
  \ifenit@boxmode
    \global\setbox\enit@inbox\hbox\bgroup\color@begingroup
      \let\item\enit@endinbox
  \fi
  \ignorespaces}

\def\enit@endinlist{%
  \ifenit@boxmode
      \unskip
      \xdef\enit@afteritem{%
        \ifhmode\spacefactor\the\spacefactor\relax\fi}%
      \color@endgroup
    \egroup
    \ifdim\wd\enit@inbox=\z@
      \enit@itemerror
    \else
      \ifenit@noinitem\else
        \ifhmode\unskip\fi
        \@ifundefined{enit@itemjoin@s}%
          {\enit@itemjoin}%
          {\enit@itemjoin@s}%
      \fi
      \unhbox\@labels
      \enit@afterlabel
      \unhbox\enit@inbox
      \enit@afteritem
    \fi
  \else
    \unskip
    \if@newlist
      \enit@itemerror
    \fi
  \fi
  \enit@after
  \global\advance\@listdepth\m@ne
  \global\@inlabelfalse
  \if@newlist
    \global\@newlistfalse
    \@noitemerr
  \fi
  \ifx\enit@series\relax\else % discards resume* list, too
    \ifnum\enit@resuming=\@ne % ie, series
      \enit@setresumekeys{series@\enit@series}\global\global
    \else % ie, resume, resume* (save count, but not keys)
      \enit@setresumekeys{series@\enit@series}\@gobblefour\global
    \fi
    \enit@afterlist
  \fi
  \ifnum\enit@resuming=\thr@@ % ie, resume* list (save count only)
    \enit@setresumekeys\@currenvir\@gobblefour\global
  \else
    \enit@setresumekeys\@currenvir\@empty\@empty
  \fi
  \aftergroup\enit@afterlist}

% \@item: unboxed
% ---------------

\def\enit@noboxitem[#1]{%
  \if@newlist
    \leavevmode % ships pending labels out
    \global\@newlistfalse
  \else
    \ifhmode
      \unskip
      \enit@itemjoin
    \else
      \noindent
    \fi
  \fi
  \if@noitemarg
    \@noitemargfalse
    \if@nmbrlist
      \refstepcounter{\@listctr}% after \unskip (hyperref)
    \fi
  \fi
  \mbox{\makelabel{#1}}%
  \enit@afterlabel
  \ignorespaces}

% \@item: boxed
% ------------
%
% We don't want \item to be executed locally, because it sets a flag
% (and hyperref adds another flag, too).  So, we redefine it inside
% the box to \enit@endinbox which ends the box and then use the actual
% (outer) \item.  labels are stored in another box, to detect empty
% boxes, ie, misplaced \item's.  Note the 2nd \item ends collecting
% the 1st item and ships it out, while the 3rd \item ends collecting
% the 2nd item, puts the itemjoin and then ships the 2nd item out.
% The flag enit@noinitem keeps track of that.

\newif\ifenit@noinitem

\def\enit@endinbox{%
    \unskip
    \xdef\enit@afteritem{%
      \ifhmode\spacefactor\the\spacefactor\relax\fi}%
    \color@endgroup
  \egroup
  \enit@outeritem}

\def\enit@boxitem[#1]{%
  \if@newlist
    \global\@newlistfalse
    \ifdim\wd\enit@inbox>\z@
       \enit@itemerror
    \fi
    \enit@noinitemtrue
    \leavevmode % ships pending labels out
  \else
    \ifdim\wd\enit@inbox=\z@
      \enit@itemerror
    \else
      \ifenit@noinitem
        \enit@noinitemfalse
      \else
        \ifhmode\unskip\fi
        \enit@itemjoin
      \fi
      \unhbox\@labels
      \enit@afterlabel
      \unhbox\enit@inbox
      \enit@afteritem
    \fi
  \fi
  \if@noitemarg
    \@noitemargfalse
    \if@nmbrlist
      \refstepcounter{\@listctr}%
    \fi
  \fi
  \sbox\@labels{\makelabel{#1}}%
  \let\enit@afteritem\relax
  \setbox\enit@inbox\hbox\bgroup\color@begingroup
    \let\item\enit@endinbox
    \hskip1sp % in case the first thing is \label
    \ignorespaces} 

% Pause item
% ----------
%
% To do.
%
% The three types
% ===============
%
% enumerate and enumerate*
% ------------------------
%
% The following has 4 arguments, which in enumerate are:
% \@enumdepth, enum, \thr@@, <format>.
% In user defined environments they are:
% \enitdp@<name>, <name>, <max-depth>, <format>

\def\enit@enumerate{%
  \let\enit@list\enit@dylist
  \enit@enumerate@i}

\@namedef{enit@enumerate*}{%
  \let\enit@list\enit@inlist
  \enit@enumerate@i}

\def\enit@enumerate@i#1#2#3#4{%
  \ifnum#1>#3\relax
    \enit@toodeep
  \else
    \enit@prelist\z@{#1}{#2}%
    \edef\@enumctr{#2\romannumeral#1}%
    \expandafter
    \enit@list
      \csname label\@enumctr\endcsname
      {\usecounter\@enumctr
       \let\enit@calc\z@
       \def\makelabel##1{\enit@align{\enit@format{##1}}}%
       \enit@preset{#2}{#1}{#4}%
       \enit@normlabel\@itemlabel\@itemlabel
       \enit@ref
       \enit@calcleft
       \enit@before}%
  \fi}

\let\enit@endenumerate\enit@endlist
\@namedef{enit@endenumerate*}{\enit@endinlist}

% itemize and itemize*
% --------------------
%
% The following has 4 arguments, which in itemize are:
% \@itemdepth, item, \thr@@, <format>.
% In user defined environments they are:
% \enitdp@<name>, <name>, <max-depth>, <format>

\def\enit@itemize{%
  \let\enit@list\enit@dylist
  \enit@itemize@i}

\@namedef{enit@itemize*}{%
  \let\enit@list\enit@inlist
  \enit@itemize@i}
  
\def\enit@itemize@i#1#2#3#4{%
  \ifnum#1>#3\relax
    \enit@toodeep
  \else
    \enit@prelist\@ne{#1}{#2}%
    \edef\@itemitem{label#2\romannumeral#1}%
    \expandafter
    \enit@list
      \csname\@itemitem\endcsname
       {\let\enit@calc\z@
        \def\makelabel##1{\enit@align{\enit@format{##1}}}%
        \enit@preset{#2}{#1}{#4}% 
        \enit@calcleft
        \enit@before}%
  \fi}

\let\enit@enditemize\enit@endlist
\@namedef{enit@enditemize*}{\enit@endinlist}

% description and description*
% ----------------------------
%
% Make sure \descriptionlabel exists:

\providecommand*\descriptionlabel[1]{%
  \hspace\labelsep
  \normalfont\bfseries#1}

\@namedef{enit@description*}{%
  \let\enit@list\enit@inlist
  \enit@description@i}

\def\enit@description{%
  \let\enit@list\enit@dylist
  \enit@description@i}

\def\enit@description@i#1#2#3#4{%
  \ifnum#1>#3\relax
    \enit@toodeep
  \else
    \enit@list{}%
      {\let\enit@type\tw@
       \advance#1\@ne
       \labelwidth\z@
       \enit@align@left
       \let\makelabel\descriptionlabel
       \enit@style@standard
       \enit@preset{#2}{#1}{#4}%
       \enit@calcleft
       \let\enit@svlabel\makelabel
       \def\makelabel##1{%
         \labelsep\z@
         \ifenit@boxdesc
           \enit@svlabel{\enit@align{\enit@format{##1}}}%
         \else
           \nobreak
           \enit@svlabel{\enit@format{##1}}%
           \aftergroup\enit@postlabel
         \fi}%
       \enit@before}%
  \fi}

\let\enit@enddescription\enit@endlist
\@namedef{enit@enddescription*}{\enit@endinlist}

% trivlist
% ========

\def\enit@trivlist{%
  \let\enit@type\tw@
  \parsep\parskip
  \csname @list\romannumeral\the\@listdepth\endcsname
  \@nmbrlistfalse
  \enit@setkeys{trivlist}%
  \enit@setkeys{trivlist\romannumeral\@listdepth}%
  \@trivlist
  \labelwidth\z@
  \leftmargin\z@
  \itemindent\z@
  \let\@itemlabel\@empty
  \def\makelabel##1{##1}}

% Description styles
% ==================
%
% the next definition is somewhat tricky because labels are boxed.
% That's fine when the label is just placed at the begining of a line
% of text, but when the box is placed without horizontal material,
% leading is killed.  So, we need change somehow \box to \unhbox, but
% I don't want to modify \@item.  The code below presumes \@item has
% not been changed and arguments gobble the part setting \@labels,
% which is replaced by a new one.
%
% The default value in description is itemindent=!, but some styles
% (those whose item text begin at a fixed place, ie, nextline,
% multiline and sameline) change it to labelwidth=!.
%
% We must be careful with the group and the whatsit added by color to
% boxes.  Alignment is applied here and some adjustments in skips are
% necessary to get proper line breaks (including a \nobreak at the
% beginning of \enit@align, ie, after the first whatsit, see above).
% To "pass" the inner group added by color to the box, \enit@postlabel
% ckecks if the following is }.  ie, \egroup -- if not, the box has
% not reached yet its end.

\def\enit@postlabel{%
  \@ifnextchar\egroup
    {\aftergroup\enit@postlabel}%
    {\enit@postlabel@i}}

\def\enit@postlabel@i#1#2#3#4#5{%
  \def\enit@lblpenalty{\penalty\z@\hskip\skip@}%
  \ifenit@nextline
    \ifdim\wd\@tempboxa>\labelwidth
      \def\enit@lblpenalty{\newline\@nobreaktrue}%
    \fi
  \fi
  \everypar{%
    \@minipagefalse
    \global\@newlistfalse
    \if@inlabel
      \global\@inlabelfalse
      {\setbox\z@\lastbox
       \ifvoid\z@
         \kern-\itemindent
       \fi}%
      \unhbox\@labels
      \skip@\lastskip % Save last \labelsep
      \unskip % Remove it 
      \enit@lblpenalty % Restore it, after penalty
    \fi
    \if@nobreak
      \@nobreakfalse
      \clubpenalty\@M
    \else
      \clubpenalty\@clubpenalty
      \everypar{}%
    \fi}%
  \def\enit@a{#1#2#3#4}%
  \def\enit@b{\global\setbox\@labels\hbox}%
  \ifx\enit@a\enit@b\else
    \enit@error{Non standard \string\item}%
      {A class or a package has redefined \string\item\MessageBreak
       and I do not know how to continue}%
  \fi
  \global\setbox\@labels\hbox{%
    \unhbox\@labels
    \hskip\itemindent
    \hskip-\labelwidth
    \hskip-\labelsep
    \ifdim\wd\@tempboxa>\labelwidth
      \enit@align{\unhbox\@tempboxa}\unskip % Removes (typically) \hfil
    \else
      \leavevmode\hbox to\labelwidth{\enit@align{\unhbox\@tempboxa}}%
    \fi
    \hskip\labelsep}}

% +=============================+
% |     (RE)DEFINING LISTS      |
% +=============================+
%
% Set keys/values
% ===============
% Remember \romannumeral0 expands to nothing.
% #1 = list name, #2 = level, #3 = flag if star, #4 = keys/values

\def\enit@saveset#1#2#3#4{%
  \setcounter{enit@cnt}{#2}%
  \ifcase#3%
    \expandafter
    \def\csname enit@@#1\romannumeral\c@enit@cnt\endcsname{#4}%
  \or
    \expandafter\let\expandafter\enit@b
      \csname enit@@#1\romannumeral\c@enit@cnt\endcsname
    \ifx\enit@b\relax
      \let\enit@b\@empty
    \fi
    \expandafter\def
      \csname enit@@#1\romannumeral\c@enit@cnt\expandafter\endcsname
      \expandafter{\enit@b,#4}%
  \fi}

% To do: more robust tests (catch wrong names, but not easy)

% Internally, LaTeX uses a short name for enumerate (enum)
% and itemize (item). To be consistent with this convention,
% a couple of macros provide a "translation". I'm not very
% happy with the current implementation.

\def\enit@shortenumerate{enum}
\def\enit@shortitemize{item}

\newcommand\setlist{%
  \@ifstar{\enit@setlist\@ne}{\enit@setlist\z@}}

\def\enit@setlist#1{%
  \@ifnextchar[{\enit@setlist@x#1}{\enit@setlist@i#1\@empty}}

% Let's accept \setlist[]*{}, too, because an error in <=3.5.1

\def\enit@setlist@x#1[#2]{%
  \@ifstar{\enit@setlist@i\@ne{#2}}{\enit@setlist@i#1{#2}}}

% #1 list names/levels, #2 keys/values

% #1 star flag, #2 list names/levels, #3 keys/values

\def\enit@setlist@i#1#2#3{%
  \let\enit@eltnames\relax
  \let\enit@b\@empty
  \let\enit@eltlevels\relax
  \let\enit@c\@empty
  \protected@edef\enit@a{#2}%
  \@for\enit@a:=\enit@a\do{% the 2nd enit@a is first expanded
    \@ifundefined{enitdp@\enit@meaning\enit@a}%
      {\edef\enit@c{\enit@c\enit@eltlevels{\enit@a}}}%
      {\@ifundefined{enit@short\enit@meaning\enit@a}%
         \@empty
         {\edef\enit@a{\@nameuse{enit@short\enit@a}}}%
       \edef\enit@b{\enit@b\enit@eltnames{\enit@a}}}}%
  \ifx\enit@b\@empty
     \def\enit@b{\enit@eltnames{list}}%
  \fi
  \ifx\enit@c\@empty
     \def\enit@c{\enit@eltlevels{0}}%
  \fi
  \def\enit@eltnames##1{%
    \def\enit@a{##1}%
    \enit@c}%
  \def\enit@eltlevels##1{%
    \enit@saveset\enit@a{##1}#1{#3}}%
  \enit@b}%

% Deprecated:

\newcommand\setdisplayed[1][0]{\setlist[trivlist,#1]}
\let\enitdp@trivlist\@empty % dummy, let know it exists
\newcommand\setenumerate[1][0]{\setlist[enumerate,#1]}
\newcommand\setitemize[1][0]{\setlist[itemize,#1]}
\newcommand\setdescription[1][0]{\setlist[description,#1]}

% New lists
% =========

% When defining a list, \label... and counters must be defined
% for each level, too:

\def\enit@xset@itemize{%
  \@namedef{label\enit@c\romannumeral\count@}{%
    \enit@error{Undefined label}%
      {You have defined a list, but labels have
       not been setup.\MessageBreak
       You can set the label field with \string\setlist.}}}
\@namedef{enit@xset@itemize*}{\enit@xset@itemize}

\def\enit@xset@enumerate{%
  \enit@xset@itemize
  \@ifundefined{c@\enit@c\romannumeral\count@}%
    {\@definecounter{\enit@c\romannumeral\count@}}{}}
\@namedef{enit@xset@enumerate*}{\enit@xset@enumerate}

\let\enit@xset@description\@empty
\@namedef{enit@xset@description*}{\enit@xset@description}

\newcommand\newlist{\enit@newlist\newenvironment}
\newcommand\renewlist{\enit@newlist\renewenvironment}

% <new/renew>, <name>, <type>, <max-depth>

\def\enit@newlist#1#2#3#4{%
  \@ifundefined{enit@xset@#3}%
    {\enit@error{Unknown list type `#3')}%
          {Valid types are:
           enumerate, itemize, description,\messageBreak
           enumerate*, itemize*, description*}}%
    {}%
  \setcounter{enit@cnt}{#4}%
  \count@\@ne
  \@ifundefined{enit@short#2}%
    {\def\enit@c{#2}}%
    {\edef\enit@c{\csname enit@short#2\endcsname}}%
  \loop
    \@nameuse{enit@xset@#3}% Uses \enit@c
    \ifnum\count@<\c@enit@cnt
    \advance\count@\@ne
  \repeat
  \@ifundefined{enitdp@#2}%
    {\expandafter\newcount\csname enitdp@#2\endcsname}{}%
  \csname enitdp@#2\endcsname\z@
  \advance\c@enit@cnt\m@ne
  \edef\enit@a{%
    \noexpand#1{#2}[1][]%
      {\enit@noexcs{enit@#3}%
       \enit@noexcs{enitdp@#2}%
       {\enit@c}%
       {\the\c@enit@cnt}%
       {####1}}%
      {\enit@noexcs{enit@end#3}}}%
  \enit@a}

% Changing the default nesting limit
% ----------------------------------

\newcommand\setlistdepth{\def\enit@listdepth}
\setlistdepth{5}

% +=============================+
% |       PACKAGE OPTIONS       |
% +=============================+

\newif\ifenit@loadonly

\DeclareOption{ignoredisplayed}{\let\enit@trivlist\trivlist}
\DeclareOption{loadonly}{\enit@loadonlytrue}
\DeclareOption{shortlabels}
  {\def\enit@shl#1{%
     \ifnum\enit@type=\tw@
       \enit@toks{#1}%
     \else
       \def\enit@c{#1}%
       \enit@first#1,\@nil\@@nil % Returns enit@toks
    \fi}}
\DeclareOption{inline}
  {\newenvironment{enumerate*}[1][]%
     {\@nameuse{enit@enumerate*}\enitdp@enumerate{enum}\thr@@{#1}}
     {\@nameuse{enit@endenumerate*}}
   \newenvironment{itemize*}[1][]%
     {\@nameuse{enit@itemize*}\enitdp@itemize{item}\thr@@{#1}}
     {\@nameuse{enit@enditemize*}}
   \newenvironment{description*}[1][]%
     {\@nameuse{enit@description*}\enitdp@description{description}\@M{#1}}
     {\@nameuse{enit@enddescription*}}}

\let\enit@shl\enit@toks

\ProcessOptions

\let\trivlist\enit@trivlist

% If there is no loadonly, redefine the basic lists:

\ifenit@loadonly\else

\let\enitdp@enumerate\@enumdepth
\renewenvironment{enumerate}[1][]
  {\enit@enumerate\enitdp@enumerate{enum}\thr@@{#1}}
  {\enit@endenumerate}

\let\enitdp@itemize\@itemdepth
\renewenvironment{itemize}[1][]
  {\enit@itemize\enitdp@itemize{item}\thr@@{#1}}
  {\enit@enditemize}

\newcount\enitdp@description
\renewenvironment{description}[1][]
  {\enit@description\enitdp@description{description}\@M{#1}}
  {\enit@enddescription}

\fi

\endinput