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enumitem.sty
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%
% Copyright (C) 2003-2025 Javier Bezos http://www.texnia.com
%
% This file may be distributed and/or modified under the conditions of
% the MIT License. A version can be found at the end of this file.
%
% Repository: https://github.com/jbezos/enumitem
%
% Release
% ~~~~~~~
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{enumitem}[2025/02/06 v3.11 Customized lists]
% Notes
% ~~~~~
%
% The tag enit@ is used through the style
%
% To do:
% ~~~~~~
% - ref*, for adding stuff in the same fashion as label*
% - 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
% - bottomsep
% - \SetEnumerateCounter - must define syntax
% - option verbose
% - collect sizes in \SetEnumitemSizes?
% - series=explicit / resume
% - package option inlinenew, to define "new" inline lists
%
% +=============================+
% | EMULATING KEYVAL |
% +=============================+
%
% "Thanks" to xkeyval, which uses the same macro names as keyval :-(,
% the latter has to be replicated in full here to ensure it works as
% intended. The original work is by David Carlisle, under license LPPL.
% Once the code is here, it could be optimized by adapting it to the
% specific needs of enumitem (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{enumitem#1}{#2}}%
{\@namedef{enitkv@enumitem#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}
% This ends the code copied from keyval (under LPPL).
% +=============================+
% | 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}
\long\def\enit@afterelse#1\else#2\fi{\fi#1}
\long\def\enit@afterfi#1\fi{\fi#1}
\def\enit@ifunset#1{%
\expandafter\ifx\csname#1\endcsname\relax
\expandafter\@firstoftwo
\else
\expandafter\@secondoftwo
\fi}
\enit@ifunset{ifcsname}%
{}%
{\def\enit@ifunset#1{%
\ifcsname#1\endcsname
\expandafter\ifx\csname#1\endcsname\relax
\enit@afterelse\expandafter\@firstoftwo
\else
\enit@afterfi\expandafter\@secondoftwo
\fi
\else
\expandafter\@firstoftwo
\fi}}
% Miscellaneous 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{Incompatible 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
\enit@ifunset{@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 overridden. 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{}{topsep}{%
\enit@setlength\topsep{#1}}
\enitkv@key{}{itemsep}{%
\enit@setlength\itemsep{#1}}
\enitkv@key{}{parsep}{%
\enit@setlength\parsep{#1}}
\enitkv@key{}{partopsep}{%
\enit@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
\enit@setlength#1{#3}%
\fi\fi}
\def\enitkv@enumitem@widest#1{%
\ifcase\enit@type % enumerate
\expandafter\let\csname enit@cw@\@enumctr\endcsname\relax
\@namedef{enit@widest@\@enumctr}##1{\enit@format{#1}}%
\else % itemize / description
\def\enit@widest@{\enit@format{#1}}%
\fi}
\def\enitkv@enumitem@widest@default{%
\expandafter\let\csname enit@cw@\@enumctr\endcsname\relax
\expandafter\let\csname enit@widest@\@enumctr\endcsname\relax}
\enitkv@key{}{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{}{labelindent*}{%
\enit@lblfrommargintrue
\ifnum\enit@calc=\z@
\enit@calcwidestfalse
\fi
\enit@setlength\labelindent{#1}%
\advance\labelindent\leftmargin}
\enitkv@key{}{labelindent}{%
\enit@lblfrommarginfalse
\enit@calcset\labelindent\z@{#1}}
\enitkv@key{}{labelwidth}{%
\enit@calcset\labelwidth\@ne{#1}}
\enitkv@key{}{leftmargin}{%
\edef\enit@c{\the\leftmargin}%
\enit@calcset\leftmargin\thr@@{#1}%
\ifenit@lblfrommargin
\advance\labelindent-\enit@c\relax
\advance\labelindent\leftmargin
\fi}
\enitkv@key{}{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{}{listparindent}{%
\enit@setlength\listparindent{#1}}
\enitkv@key{}{rightmargin}{%
\enit@setlength\rightmargin{#1}}
% labelsep, from itemindent; labelsep*, from leftmargin
\enitkv@key{}{labelsep*}{%
\enit@sepfrommargintrue
\ifnum\enit@calc=\tw@
\enit@calcwidestfalse
\let\enit@calc\z@
\fi
\enit@setlength\labelsep{#1}%
\advance\labelsep\itemindent}
\enitkv@key{}{labelsep}{%
\enit@sepfrommarginfalse
\enit@calcset\labelsep\tw@{#1}}
\enitkv@key{}{left}{%
\enit@setleft#1..\@empty..\@@}
\def\enit@setleft#1..#2..#3\@@{%
\enit@setlength\labelindent{#1}%
\edef\enit@a{#3}%
\ifx\enit@a\@empty
\enit@calcset\leftmargin\thr@@*%
\else
\enit@setlength\leftmargin{#2}%
\enit@calcset\labelsep\tw@*%
\fi}
% Series, resume and start
% ========================
\enitkv@key{-resume}{series}{%
\enit@checkseries@m
\let\enit@resuming\@ne %%% TODO - default check also \Set..Key
\ifcase\enit@seriesopt
\enit@ifunset{enitkv@enumitem@#1}{}%
{\enit@error
{Invalid series name '#1'}%
{Do not name a series with an existing key}}%
\else % series=override
\global\@namedef{enitkv@enumitem@#1}% with value
{\enit@error
{Key '#1' has been overridden by a series}%
{Change the series name and/or deactivate series=override}}%
\global\@namedef{enitkv@enumitem@#1@default}{}%
\fi
\def\enit@series{#1}}
\enitkv@key{}{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}%
\enit@ifunset{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}
\@namedef{enitkv@enumitem-resume@resume*@default}{%
\let\enit@resuming\thr@@
\enit@ifunset{enit@resumekeys@\@currenvir}%
{\PackageWarning{enumitem}{Nothing to resume,}%
\let\enit@resumekeys\@empty}
{\let\enit@resuming\thr@@
\expandafter\let\expandafter\enit@resumekeys
\csname enit@resumekeys@\@currenvir\endcsname
\@nameuse{enit@resume@\@currenvir}\relax}}
\enitkv@key{}{resume*}[]{%
\enit@checkseries{resume*}}
\newcommand\restartlist[1]{%
\enit@ifunset{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{}{start}[\@ne]{%
\setcounter{\@listctr}{#1}%
\advance\@nameuse{c@\@listctr}\m@ne}
% Penalties
% =========
\enitkv@key{}{beginpenalty}{%
\@beginparpenalty#1\relax}
\enitkv@key{}{midpenalty}{%
\@itempenalty#1\relax}
\enitkv@key{}{endpenalty}{%
\@endparpenalty#1\relax}
% Font/Format
% ===========
\enitkv@key{}{format}{%
\def\enit@format{#1}}
\enitkv@key{}{font}{%
\def\enit@format{#1}}
% Description styles
% ==================
\enitkv@key{}{style}[normal]{%
\enit@ifunset{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
% ===============
% Alignment
% --------
\enitkv@key{}{align}{%
\enit@ifunset{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{}{label}{%
\expandafter\def\@itemlabel{#1}%
\def\enit@ref{\expandafter\enit@reflabel\@itemlabel\z@}}
\enitkv@key{}{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
% overridden by label (besides ref), too. Since an explicit ref has
% preference, it's delayed.
\enitkv@key{}{ref}{%
\g@addto@macro\enit@delayedkeys{,ref=#1}}
\enitkv@key{-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{}{itemjoin}{%
\def\enit@itemjoin{#1}}
\enitkv@key{}{itemjoin*}{%
\def\enit@itemjoin@s{#1}}
\enitkv@key{}{afterlabel}{%
\def\enit@afterlabel{#1}}
% Mode
% ----
\enitkv@key{}{mode}{%
\enit@ifunset{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}%
\enit@ifunset{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{}{before}{%
\def\enit@before{#1}}
\enitkv@key{}{before*}{%
\expandafter\def\expandafter\enit@before\expandafter
{\enit@before#1}}
\enitkv@key{}{after}{%
\def\enit@after{#1}}
\enitkv@key{}{after*}{%
\expandafter\def\expandafter\enit@after\expandafter
{\enit@after#1}}
\enitkv@key{}{first}{%
\def\enit@keyfirst{#1}}
\enitkv@key{}{first*}{%
\expandafter\def\expandafter\enit@keyfirst\expandafter
{\enit@keyfirst#1}}
% Miscellaneous keys
% ================
\enitkv@key{}{nolistsep}[true]{%
\partopsep=\z@skip
\topsep=\z@ plus .1pt
\itemsep=\z@skip
\parsep=\z@skip}
\enitkv@key{}{nosep}[true]{%
\partopsep=\z@skip
\topsep=\z@skip
\itemsep=\z@skip
\parsep=\z@skip}
\enitkv@key{}{noitemsep}[true]{%
\itemsep=\z@skip
\parsep=\z@skip}
\enitkv@key{}{wide}[\parindent]{%
\enit@align@left
\leftmargin\z@
\labelwidth\z@
\enit@setlength\labelindent{#1}%
\listparindent\labelindent
\enit@calcset\itemindent\enit@iv!}
% The following is deprecated in favour of wide:
\enitkv@key{}{fullwidth}[true]{%
\leftmargin\z@
\labelwidth\z@
\def\enit@align##1{\hskip\labelsep##1}}
% "Abstract" layer
% ================
%
% Named values
% ------------
\newcommand\SetEnumitemValue[2]{% Implicit #3
\enit@ifunset{enit@enitkv@#1}%
{\enit@ifunset{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}%
\enit@ifunset{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]{%
\enit@ifunset{enitkv@enumitem@#1}%
{\enitkv@key{}{#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
% ========
%
% Default definition. Modified below with package option 'sizes'.
\def\enit@setkeys#1{%
\enit@ifunset{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 either \enit@toks or returns it
\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{%
\enit@ifunset{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
\ifcase\enit@type % ie, enum
\enit@ifunset{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}}}%
\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
\or % ie, item
\ifx\enit@widest@\relax
\settowidth\labelwidth{\@itemlabel}%
\else
\settowidth\labelwidth{\enit@widest@}%
\fi
\else % ie, desc
\ifx\enit@widest@\relax
\settowidth\labelwidth{\@itemlabel}%
\else
\settowidth\labelwidth{\makelabel{\enit@widest@}}%
\fi
\advance\labelwidth-\labelsep
\fi
\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}
\def\enit@negwidth{%
\ifdim\labelwidth<\z@
\PackageWarning{enumitem}%
{Negative labelwidth. This does not make much\MessageBreak
sense,}%
\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}%
% Suggested by @muzimuzhi, amended. See Gh36.
\def\enit@refstar@ii#1#2{%
\if*#2\@empty
\noexpand\the\noexpand#1{\@enumctr}%
\else
\noexpand\the\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@ii\value}%
\let\enit@elt\enit@refstar
\enit@labellist
% Added braces as \ref is in the global scope:
\protected@xdef\enit@a{{#2}}%
\endgroup
\expandafter\let#1\enit@a}
% 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}
\newcount\enit@count@id
\def\enit@tagid{%
\global\advance\enit@count@id\@ne
\edef\EnumitemId{\number\enit@count@id}}
\def\enit@preset#1#2#3{%
\enit@tagid
\enit@sepfrommarginfalse
\enit@calcwidestfalse
\let\enit@widest@\relax
\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@keyfirst\@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{%
\enit@ifunset{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{%
\enit@ifunset{enit@resumekeys@series@\@tempa}%
{\enit@savekverr{#1}}%
{}}