new (and updated) latex package boolexpr (30jul09)

git-svn-id: svn://tug.org/texlive/trunk@14675 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 1133 insertions, 0 deletions

diff --git a/Master/texmf-dist/source/latex/boolexpr/boolexpr.dtx b/Master/texmf-dist/source/latex/boolexpr/boolexpr.dtx
new file mode 100644
index 00000000000..fb4f03f7095
--- /dev/null
+++ b/Master/texmf-dist/source/latex/boolexpr/boolexpr.dtx
@@ -0,0 +1,1052 @@
+% \iffalse meta-comment
+% boolexpr : purely expandable boolean expressions and switch (eTeX)
+%
+% This work 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
+%
+% Copyright (C) 2009 by Florent Chervet <florent.chervet@free.fr>
+%
+% This work consists of the main source file keycommand.dtx
+% and the derived files
+%    boolexpr.sty, boolexpr.pdf, boolexpr.ins,
+%
+% Unpacking:
+%    (a) If boolexpr.ins is present:
+%           etex boolexpr.ins
+%    (b) Without boolexpr.ins:
+%           etex boolexpr.dtx
+%    (c) If you insist on using LaTeX
+%           latex \let\install=y\input{boolexpr.dtx}
+%        (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+%           (pdf)latex boolexpr.dtx
+%
+%<*ignore>
+\begingroup
+  \def\x{LaTeX2e}%
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+         \ifx\csname processbatchFile\endcsname\relax\else1\fi
+         \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: boolexpr 2009/08/12 v2.1 provides purely expandable boolean expressions and switch (eTeX)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+boolexpr : a purely expandable boolean expressions and switch (eTeX)
+
+This work 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
+
+Copyright (C) 2009 by Florent Chervet <florent.chervet@free.fr>
+
+This work consists of the main source file boolexpr.dtx
+and the derived files
+   boolexpr.sty, boolexpr.pdf, boolexpr.ins,
+
+boolexpr : a purely expandable boolean expressions and switch  (eTeX)
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+  \file{boolexpr.ins}{\from{boolexpr.dtx}{install}}%
+  \file{boolexpr.sty}{\from{boolexpr.dtx}{package}}%
+}
+
+\obeyspaces
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{*     boolexpr.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `boolexpr.dtx'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\edef\thisfile{\jobname}
+\def\thisinfo{Purely expandable boolean expressions and switch (\eTeX).}
+\let\loadclass\LoadClass
+\def\LoadClass#1{\loadclass[abstracton]{scrartcl}\let\scrmaketitle\maketitle\AtEndOfClass{\let\maketitle\scrmaketitle}}
+\documentclass[a4paper,oneside]{ltxdoc}
+\usepackage{tracing}
+\usepackage[latin9]{inputenc}
+\usepackage[american]{babel}
+\usepackage{etex,holtxdoc,etoolbox,geometry,tocloft,fancyhdr,color,bbding,embedfile,enumitem,framed,txfonts,relsize}\CodelineNumbered
+\usepackage{fancyvrb}
+\IfFileExists{boolexpr.sty}
+   {\RequirePackage{boolexpr}}
+   \relax
+\embedfile{\thisfile.dtx}
+\geometry{top=2cm,headheight=1cm,headsep=.3cm,bottom=1.4cm,footskip=.5cm,left=4cm,right=2cm}
+\hypersetup{%
+  pdftitle={The boolexpr package},
+  pdfsubject={An e-TeX package for more useful tools for LaTeX package writers},
+  pdfauthor={Florent CHERVET},
+  colorlinks,linkcolor=reflink,urlcolor=refurl,
+  pdfstartview={FitH},
+  pdfkeywords={tex, e-tex, latex, package, boolexpr, boolean, ifthen, ifthenelse, conditionals},
+  bookmarksopen=true,bookmarksopenlevel=2}
+\begin{document}
+   \DocInput{\thisfile.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{257}
+%
+% \CharacterTable
+%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%   Digits        \0\1\2\3\4\5\6\7\8\9
+%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%   Dollar        \$     Percent       \%     Ampersand     \&
+%   Acute accent  \'     Left paren    \(     Right paren   \)
+%   Asterisk      \*     Plus          \+     Comma         \,
+%   Minus         \-     Point         \.     Solidus       \/
+%   Colon         \:     Semicolon     \;     Less than     \<
+%   Equals        \=     Greater than  \>     Question mark \?
+%   Commercial at \@     Left bracket  \[     Backslash     \\
+%   Right bracket \]     Circumflex    \^     Underscore    \_
+%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%   Right brace   \}     Tilde         \~}
+%
+% \DoNotIndex{\begin,\CodelineIndex,\CodelineNumbered,\def,\DisableCrossrefs}
+% \DoNotIndex{\DocInput,\documentclass,\EnableCrossrefs,\end,\GetFileInfo}
+% \DoNotIndex{\NeedsTeXFormat,\OnlyDescription,\RecordChanges,\usepackage}
+% \DoNotIndex{\ProvidesClass,\ProvidesPackage,\ProvidesFile,\RequirePackage}
+% \DoNotIndex{\filename,\fileversion,\filedate,\let}
+% \DoNotIndex{\@listctr,\@nameuse,\csname,\else,\endcsname,\expandafter}
+% \DoNotIndex{\gdef,\global,\if,\item,\newcommand,\nobibliography}
+% \DoNotIndex{\par,\providecommand,\relax,\renewcommand,\renewenvironment}
+% \DoNotIndex{\stepcounter,\usecounter,\nocite,\fi}
+% \DoNotIndex{\@fileswfalse,\@gobble,\@ifstar,\@unexpandable@protect}
+% \DoNotIndex{\AtBeginDocument,\AtEndDocument}
+% \DoNotIndex{\frenchspacing,\MessageBreak,\newif,\PackageWarningNoLine}
+% \DoNotIndex{\protect,\string,\xdef,\ifx,\texttt,\@biblabel,\bibitem}
+% \DoNotIndex{\z@,\wd,\vrule,\voidb@x,\verb,\bibitem}
+% \DoNotIndex{\hskip,\hfil,\hfill,\hsize,\hspace,\hss,\hbox,\hb@xt@,\escapechar}
+% \DoNotIndex{\date,\ifdefined,\ifhmode,\ifmmode,\cr}
+% \DoNotIndex{\box,\author,\advance,\multiply,\Command,\outer,\kern,\title,\tt}
+% \DoNotIndex{\the,\space,\section,\subsection,\textwidth}
+% \DoNotIndex{\",\@empty,\@latex@error,\makeatletter,\makeatother}
+% \DoNotIndex{\maketitle,\parindent,\setbox}
+%
+%
+% \makeatletter
+% \lastlinefit999
+% \newif\ifboolexprLoaded
+% \ifdefined\boolexpr\boolexprLoadedtrue\else\boolexprLoadedfalse\fi
+% \newcommand\macrocodecolor{\color{macrocode}}\definecolor{macrocode}{rgb}{0.18,0.00,0.45}
+% \newcommand\reflinkcolor{\color{reflink}}\definecolor{reflink}{rgb}{0.49,0.00,0.00}
+% \newcommand\refurlcolor{\color{refurl}}\definecolor{refurl}{rgb}{0.00,0.00,1.00}
+% \newcommand\cmdref[1]{\hyperref[#1]{\underline{\reflinkcolor\CS{#1}}}}
+% \newcommand\cmdlabel[1]{\label{#1}\hyperdef{cmdlabel}{#1}{}}
+% \definecolor{dg}{rgb}{0.02,0.37,0.00}
+% \def\ThisPackage{\Xpackage{\thisfile}}\def\thispackage{\xpackage{\thisfile}}
+% \fancyhf{}\fancyhead[L]{\thispackage\ -- \thisinfo}
+% \fancyfoot[L]{\color[gray]{.35}\scriptsize\thispackage\quad\copyright\oldstylenums{2009}\,\lower.3ex\hbox{\NibRight}\,Florent Chervet}
+% \fancyfoot[R]{\oldstylenums{\thepage} / \oldstylenums{\pageref{LastPage}}}
+% \pagestyle{fancy}
+% \fancypagestyle{plain}{\fancyhf{}\let\headrulewidth\z@\fancyfoot[R]{\oldstylenums{\thepage} / \oldstylenums{\pageref{LastPage}}}}
+%
+% \catcode`\§\active\def§{\par\nobreak\vskip-\parskip}
+% \newlength\saveparskip\saveparskip.4\baselineskip
+% \newcommand\restoreparskip{\parskip\saveparskip}
+% \parindent\z@\parskip\saveparskip\topsep\z@\partopsep\z@
+% \g@addto@macro\macro@font{\macrocodecolor\let\AltMacroFont\macro@font}
+% \def\smex{\leavevmode\hb@xt@2em{\hfil$\longrightarrow$\hfil}}
+% \def\csred#1{\textcolor{red}{\cs{#1}}}
+% \def\CSif\bgroup\ignorespaces#1{\bgroup\ignorespaces\ifx#1\unskip\else \CS{#1}\fi}
+% \def\CSbf#1{\textbf{\CS{#1}}}
+% \def\Repeat#1#2{\ifnum\numexpr#1\relax>0\relax #2\relax\Repeat{#1-1}{#2}\fi}
+% \def\Xpackage{\@dblarg\X@package}
+%  \def\X@package[#1]#2{%
+%     \xpackage{#2\footnote{\noindent\xpackage{#2}: \href{http://www.ctan.org/tex-archive/macros/latex/contrib/#1}{\nolinkurl{CTAN:macros/latex/contrib/#1}}}}}
+% \deffootnote{1em}{0pt}{\rlap{\textsuperscript{\thefootnotemark}}\kern1em}
+% \def\nq{\,!\!=}
+% \def\nq{<>}
+% \def\ie{\textsl{ie.\,}}
+% \newbox\Sharpbox\setbox\Sharpbox=\hbox{|#|}
+% \newcommand\Sharp[1]{\usebox\Sharpbox|#1|}
+% \newcommand\myfbox[2][3em]{\fbox{\hbox to#1{\hss#2\hss}}}
+% \newbox\boxedb@x
+% \newcommand\boxedbox[1]{\setbox\boxedb@x\vbox{#1}\fbox{\box\boxedb@x}}
+% \DefineVerbatimEnvironment{VerbEx}{Verbatim}{gobble=1,commandchars=![]}
+% \newcommand\evaluated{\textcolor{blue}}
+% \newcommand\notevaluated{\textcolor{black}}
+% \newcommand\stripmeaning{\expandafter\strip@prefix\meaning}
+% \makeatother
+%
+% \title{\mdseries The {\bfseries \ThisPackage}\kern.6em package}
+% \author{Florent Chervet {\small\xemail{florent.chervet@free.fr}}}
+% \date{July 22, 2009}
+% \subtitle{\thisinfo}
+%
+% \maketitle \vskip-2\baselineskip\strut
+%
+% \makeatletter\begingroup\let\@thefnmark\@empty\let\@makefntext\@firstofone
+% \footnotetext{\noindent
+% This documentation is produced with the |DocStrip| utility.
+% \begin{tabbing}
+% \qquad\=\smex\=To get the documentation, \= run (thrice):\quad\= \texttt{pdflatex boolexpr.dtx} \\
+% \>\>for the index:\>\>\texttt{makeindex -s gind.ist boolexpr.idx} \\
+% \>\smex\>To get the package, \> run:\>        \texttt{etex boolexpr.dtx}
+% \end{tabbing}§
+%  The \xext{dtx} file is embedded into this pdf file thank to \xpackage{embedfile} by H. Oberdiek.}
+% \endgroup\makeatother
+%
+% \deffootnote{1em}{0pt}{\rlap{\thefootnotemark.}\kern1em}
+%
+% \begin{abstract}\parindent0pt\noindent\parskip\medskipamount\small\abovedisplayskip=0pt\belowdisplayskip=0pt
+% \vskip-\baselineskip
+% \xpackage{boolexpr} provides a purely expandable way to evaluate boolean expressions of the form:
+%
+% \hfil\framebox[.618\linewidth][c]{$\alpha\quad\cs{AND}\quad\beta\quad\cs{OR}\quad\gamma\quad\dots$}\hfil
+%
+% where $\alpha$\,,\, $\beta$\, and $\gamma$ are \textit{atomic expressions} of one of those 8 valid forms:
+% \begin{center}
+% \begin{tabular}{*{6}{>{\hskip4pt}c<{\hskip4pt}}}
+% \myfbox{$x=y$} & \myfbox{$x\nq y$}\footnotemark & \myfbox{$x<y$} & \myfbox{$x<=y$} & \myfbox{$x>y$} & \myfbox{$x>=y$} \\[12pt]
+% \multicolumn{3}{c}{\myfbox[4.5cm]{\cs{if}\meta{test}\ $0$\cs{else} $1$\cs{fi}}} &
+%                                            \multicolumn{3}{c}{\myfbox[4.5cm]{another \cs{boolexpr} evaluation}}
+% \end{tabular}\end{center}
+% \footnotetext{The choice of $\nq$ rather than $\char33\!=$ is due to \nameref{catcodes}.}
+%
+% where $x$ and $y$ are either numeric expressions (or dimensions, glue, muglue to test using |\dimexpr|, |\glueexpr|
+% or |\muexpr| -- please refer to the \nameref{examples}) and \meta{test} may be a switch (\cs{iftrue} / \cs{iffalse}
+% or a conditional\footnote{\cs{if}, \cs{ifcase}, \cs{ifcat}, \cs{ifcsname}, \cs{ifdefined}, \cs{ifdim}, \cs{ifeof},
+% \cs{iffontchar}, \cs{ifhmode}, \cs{ifinner}, \cs{ifmmode}, \cs{ifnum}, \cs{ifodd}, \cs{ifvmode}, \cs{ifvoid}, \cs{ifx}}).
+% \xpackage{boolexpr} abide by the precedence of |\AND| on |\OR|,
+% and the whole expression is evaluated until the result is known (in other words, |\AND| and |\OR| are \textit{shortcut}
+% boolean operators).
+%
+% \cmdref{boolexpr} will expand to \textbf{0} if the expression is \textbf{true}, making it proper to work with |\ifcase|.
+%
+% Furthermore, \xpackage{boolexpr} defines a \cmdref{switch} syntax which remains purely expandable.
+%
+% The \xpackage{boolexpr} package is designed to work with an \eTeX{} distribution of \LaTeX{}:
+% it is based on the \eTeX{} |\numexpr| primitive and requires no other package.
+%
+% \end{abstract}\vskip-\baselineskip
+%
+% \cftbeforesecskip=5pt plus2pt minus4pt
+% \bigskip\setcounter{tocdepth}{2}
+% {\smaller\tableofcontents}
+%
+% \def\B#1{\texttt{[}\meta{#1}\texttt{]}}
+%
+%
+% \section{Introduction -- Using \xpackage{boolexpr} : \cs{boolexpr} and \cs{switch}}
+%
+% \begin{declcs}{boolexpr}\,\M{boolean expression}
+% \end{declcs}\cmdlabel{boolexpr}
+% \cs{boolexpr} is a macro that takes for unique argument a series of \textit{atomic expressions} of the form:\par
+% \hskip2em\begin{tabular}{r>{$}c<{$}l}
+%    numeric expr. & =   & numeric expr. \\
+%    numeric expr. & \nq & numeric expr. \\
+%    numeric expr. & <   & numeric expr  \\
+%    numeric expr. & <=  & numeric expr  \\
+%    numeric expr. & >   & numeric expr. \\
+%    numeric expr. & >=  & numeric expr. \\
+%    \cs{if}& \meta{test}& 0\ \cs{else}\ 1\cs{fi}\\
+%    \multicolumn{3}{c}{\cs{boolexpr}\{\meta{boolean expression}\}}
+% \end{tabular}\par\noindent
+% related by \CSbf{AND} or \CSbf{OR} (with the usual logical precedence).
+%
+% \textbf{\cs{boolexpr} expands to \textbf{0} if the whole expression is \textbf{true}}
+% and to a non nul number if the whole expression is false.
+%
+% \cs{boolexpr} is \textbf{purely expandable}.
+%
+% \begin{framed}
+% Therefore, testing may be used as follow:§
+% \begin{Verbatim}[gobble=1]
+%     \ifcase\boolexpr{ boolean expression }
+%          what to do if true
+%     \else
+%          what to do if false
+%     \fi
+% \end{Verbatim}
+% \end{framed}
+%
+% It is possible to use \texttt{switches} as boolean quantities into a \cs{boolexpr} expression
+% with the syntax:§
+% \qquad|\ifswitch 0\else 1\fi|
+%
+% It is also possible to use |\ifdim|, |\ifnum| etc. (although it is not necessary because other forms
+% of atomic expression can perform those tests more easily) and |\ifdefined|, |\ifcsname| etc. with
+% the same syntax, f.ex.:§
+% \qquad|\ifcsname| \meta{cs-name} |\endcsname  0\else 1\fi|
+%
+% It means that if the conditional is \texttt{true} then the \textit{atomic expression} is \texttt{true}
+% (expands to |0|), otherwise the \textit{atomic expression} is |false| (expands to non |0|).
+%
+% It is possible to test |dimensions| (or |glue| or |muglue|) by writing |\dimexpr|
+% (or |\glueexpr| or |\muexpr|) in front of the \textit{atomic expression}; therefore, the following are valid atomic expressions:§
+% \hskip2em\begin{tabular}{rr>{$}c<{$}l}
+%   \cs{dimexpr}  & dimen expr. & <  & dimen expr \\
+%   \cs{glueexpr} & glue expr.  & \nq & glue expr. \\
+%   \cs{muexpr}   & mu expr.    & =  & mu expr.
+% \end{tabular}
+%
+% It is allowed to group expressions inside the argument of |\boolexpr| by inserting another |\boolexpr| evaluation, f.ex.:§
+% \qquad|\boolexpr{  \boolexpr{ |$\alpha$ | \OR | $\beta$ |} \AND | $\gamma$ |  }|
+%
+% The logical \textbf{NOT} operator can be achieved by writing for example:§
+% \qquad|\ifcase\boolexpr{|\meta{boolean expression}|} 1\else 0\fi|
+%
+% Finally, if the \meta{boolean expression} is missing:§
+%\qquad|\boolexpr{  }| expands to |1| (\ie |false|).
+%
+% \begin{declcs}{ifboolexpr}\,\M{boolean expression}\,\M{true part}\,\M{false part}
+% \end{declcs}
+% \cs{ifboolexpr} is the \LaTeX{} form of a |\boolexpr| test.\enlargethispage{\baselineskip}
+%
+% \cs{ifboolexpr} is purely expandable (provided \meta{true part} and \meta{false part} are so).
+%
+%
+% \clearpage
+% \subsection*{\CSbf{boolexpr} examples}\label{examples}\addcontentsline{toc}{subsection}{\cs{boolexpr} Examples}
+% \vskip-\baselineskip The part of the expression that is evaluated \textcolor{blue}{is in blue} (the remainder is not evaluated).
+%
+% \begin{tabular}{m{9.5cm}>{\color{dg}\smex\tt}m{5.6cm}}\hline
+% \begin{VerbEx}
+%  \ifcase\boolexpr{ !evaluated[45 > 80 \OR 5<>5 \AND]  5<4 }
+%        boolexpr is true
+%  \else boolexpr is false
+%  \fi
+%  \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \ifcase\boolexpr{ 45 > 80 \OR 5<>5 \AND  5<4 }
+%       boolexpr is true
+% \else boolexpr is false
+% \fi
+% \else
+% boolexpr is false
+% \fi
+%  \\ \hline
+% \begin{VerbEx}
+%  \ifcase\boolexpr{ !evaluated[45 < 80 \OR] 5 = 5 \AND  0<>0 }
+%        boolexpr is true
+%  \else boolexpr is false
+%  \fi
+%  \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \ifcase\boolexpr{ 45 < 80 \OR 5 = 5 \AND  0<>0 }
+%       boolexpr is true
+% \else boolexpr is false
+% \fi
+% \else
+% boolexpr is true
+% \fi
+%  \\ \hline
+% \begin{VerbEx}
+%  \ifcase\boolexpr{ !evaluated[\boolexpr{ 45 < 80 \OR !notevaluated[5 = 5] } \AND  0<>0] }
+%        boolexpr is true
+%  \else boolexpr is false
+%  \fi
+%  \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \ifnum\boolexpr{ \boolexpr{ 45 < 80 \OR 5 = 5 } \AND  0<>0 }=0
+%       boolexpr is true
+% \else boolexpr is false
+% \fi
+% \else
+% boolexpr is false
+% \fi
+%  \\ \hline
+% \begin{VerbEx}
+% \ifcase\boolexpr{ !evaluated[12>0 \AND (4+3)*5 > 20] }
+%       boolexpr is true
+% \else boolexpr is false
+% \fi
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \ifcase\boolexpr{ 12>0 \AND (4+3)*5 > 20}
+%       boolexpr is true
+% \else boolexpr is false
+% \fi
+% \else
+% boolexpr is true
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \makeatletter
+% \number\boolexpr{ !evaluated[\the\catcode`\@=11] }
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \makeatletter
+% $\number\boolexpr{\the\catcode`\@=11}$ §{\small(catcode of character @ is 11)}
+% \else
+% $0$ §{\small(catcode of character @ is 11)}
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \makeatother
+% \number\boolexpr{ !evaluated[\the\catcode`\@=11] \AND \ifdefined\@undefined 0\else 1\fi }
+% \end{VerbEx}
+% &\omit \\[-2ex] & \omit
+% \ifboolexprLoaded {\color{dg}\smex
+% $\number\boolexpr{\catcode`\@=11 \AND \ifdefined\@undefined 0\else 1\fi}$} \\ &\omit {\color{dg}\tt\small(catcode of character @ is 12)}
+% \else {\color{dg}\smex
+%  $1$ {\small(catcode of character @ is 12)} }
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \makeatletter
+% \number\boolexpr{ !evaluated[3<4 \AND \@ifundefined{iftest}{1}]{\iftest 0\else 1\fi} }
+% \end{VerbEx}
+% & \omit\\[-2ex] & \omit
+% \ifboolexprLoaded {\color{dg}\smex
+% \makeatletter
+% \number\boolexpr{ 3<4 \AND \@ifundefined{iftest}{1}{\iftest 0\else 1\fi} }: |\iftest| not defined \hfil}
+% \else {\color{bg} \smex 1: |\iftest| not defined\hfil}
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \makeatletter   \newif\iftest   \testtrue
+% \number\boolexpr{ !evaluated[3<4 \AND \@ifundefined{iftest}]{1}!evaluated[{\iftest 0\else 1\fi}] }
+% \end{VerbEx}
+% & \omit\\[-2ex] & \omit
+% \ifboolexprLoaded {\color{dg}\smex
+% \makeatletter\newif\iftest\testtrue
+% \number\boolexpr{ 3<4 \AND \@ifundefined{iftest}{1}{\iftest 0\else 1\fi} }: |\iftest| is true \hfil}
+% \else {\color{bg} \smex 0: |\iftest| is true \hfil}
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \ifcase\boolexpr{ !evaluated[\dimexpr 12pt + 1in > 8mm * 2 \AND \iftest 0\else 1\fi] }
+%        boolexpr is true
+% \else  boolexpr is false
+% \fi
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \newif\iftest \testtrue
+% \ifcase\boolexpr{ \dimexpr 12pt + 1in > 8mm * 2 \AND \iftest 0\else 1\fi }
+%        boolexpr is true
+% \else  boolexpr is false
+% \fi
+% \else boolexpr is true
+% \fi
+% \\ \hline
+% \begin{VerbEx}
+% \ifcase\boolexpr{ !evaluated[0=0 \AND \ifcase\boolexpr{1=1 \AND 5<=5} 1\else 0\fi] }
+%        boolexpr is true
+% \else  boolexpr is false
+% \fi
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \ifcase\boolexpr{ 0=0 \AND \ifcase\boolexpr{ 1=1 \AND 5<=5 } 1\else 0\fi }
+%        boolexpr is true
+% \else  boolexpr is false
+% \fi
+% \else boolexpr is false
+% \fi \footnotesize
+%     § $\alpha$ |\AND NOT( |$\beta$| \AND |$\gamma$| )|
+%     § $\!\!\!\!\!\!=\alpha$| \AND NOT |$\beta$| \OR |$\alpha$| \AND NOT |$\gamma$
+% \\ \hline
+% \end{tabular}
+%
+% \ifboolexprLoaded Results in green were evaluated by \xpackage{boolexpr.sty} at compilation time.
+% \else Results in green were not evaluated at compilation time: \xpackage{boolexpr} was not found.
+% \fi
+%
+% \clearpage
+% \subsection*{The \CSbf{switch} syntax}\label{switchsyntax}\addcontentsline{toc}{subsection}{The \cs{switch} syntax}
+%
+% \begin{declcs}{switch}\\
+% \CSbf{case}\,\M{boolean expression}\quad... \\
+% \CSbf{case}\,\M{boolean expression}\quad... \\
+% \CSbf{otherwise}\quad... \\
+% \CS{endswitch}
+% \end{declcs}\cmdlabel{switch}
+%
+% \xpackage{boolexpr} defines a syntax for \cs{switch} conditionals which remains purely expandable:
+% \iffalse
+% \begin{VerbEx}
+% \switch
+% !textbf[\case]{ !meta[bool expr] } ...
+% !textbf[\case]{ !meta[beel expr] } ...
+% !textbf[\case]{ !meta[bool expr] } ...
+% !textbf[\otherwise] ...
+% \endswitch
+% \end{VerbEx}
+% \fi
+%
+% \textbf{Each part of the switch is optional.} That means:
+% \begin{center}
+% \begin{tabular}{m{.4\textwidth}m{.4\textwidth}}
+% \begin{VerbEx}
+% \switch
+% !textbf[\case]{ !meta[bool expr] } ...
+% !textbf[\case]{ !meta[beel expr] } ...
+% !textbf[\case]{ !meta[bool expr] } ...
+% \endswitch
+% \end{VerbEx}
+% & 
+% \begin{VerbEx}
+% \switch
+% !textbf[\otherwise] ...
+% \endswitch
+% \end{VerbEx}
+% \\ 
+% \begin{VerbEx}
+% \switch
+% \endswitch
+% \end{VerbEx}
+% & are allowed by \xpackage{boolexpr}.
+% \end{tabular}
+% \end{center}
+% 
+%
+%
+% \subsection*{\CSbf{switch} examples}\label{switchexamples}\addcontentsline{toc}{subsection}{switch examples}
+% 
+% The part of the expression that is evaluated \textcolor{blue}{is in blue} (the remainder is not evaluated).
+%
+% \begin{tabular}{m{9.5cm}>{\color{dg}\smex\tt}m{5.6cm}}\hline
+% \begin{VerbEx}
+% !evaluated[\switch]
+% !evaluated[\case{6>1 \AND 6<=5}$\geq 1$ and $\leq 5$%]
+% !evaluated[\case{3<10}$> 5$ and $< 10$%]
+% \case{3>10}$\geq 10$%
+% !evaluated[\endswitch]
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \switch
+% \case{6>1 \AND 6<=5}$\geq 1$ and $\leq 5$%
+% \case{3<10}$>5$ and $< 10$%
+% \case{3>10}$\geq 10$%
+% \endswitch
+% \else
+% $>5$ and $< 10$%
+% \fi
+%  \\ \hline
+% \begin{VerbEx}
+% \edef\result{%
+% !evaluated[\switch]
+% !evaluated[\case{6>1 \AND 6<=5}$\geq 1$ and $\leq 5$%]
+% !evaluated[\case{3<10}$> 5$ and $< 10$%]
+% \case{3>10}$\geq 10$%
+% !evaluated[\endswitch]}
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \edef\result{%
+% \switch
+% \case{6>1 \AND 6<=5}$\geq 1$ and $\leq 5$%
+% \case{3<10}$>5$ and $< 10$%
+% \case{3>10}$\geq 10$%
+% \endswitch}
+% \else
+% \def\result{$>5$ and $< 10$}
+% \fi
+% result:\par\stripmeaning\result
+%  \\ \hline
+% \begin{VerbEx}
+% \def\result#1{\textbf{%
+% !evaluated[\switch]
+% !evaluated[\case{\pdfstrcmp{#1}{one}}one]%
+% !evaluated[\case{\pdfstrcmp{#1}{two}}two]%
+% !evaluated[\otherwise something else]%
+% !evaluated[\endswitch]}}
+%
+% \protected@edef\result{\result{12}}
+% \end{VerbEx}
+% &
+% \ifboolexprLoaded
+% \def\result#1{\textbf{%
+% \switch
+% \case{\pdfstrcmp{#1}{one}}one%
+% \case{\pdfstrcmp{#1}{two}}two%
+% \otherwise something else%
+% \endswitch}}
+% \makeatletter\protected@edef\result{\result{12}}\makeatother
+% \else
+% \makeatletter\protected@edef\result{\textbf{something else}}\makeatother
+% \fi
+% result:\stripmeaning\result
+% \\ \hline
+% 
+% \end{tabular}
+%
+% \ifboolexprLoaded Results in green were evaluated by \xpackage{boolexpr.sty} at compilation time.
+% \else Results in green were not evaluated at compilation time: \xpackage{boolexpr} was not found.
+% \fi
+%
+% \StopEventually{
+% }
+%
+% \clearpage
+% \section{Implementation}
+%
+% \subsection{The algorithm} \enlargethispage{2\baselineskip}
+%
+% The \emph{string} is the suite of \textit{atomic expressions} connected by |\AND| or |\OR|.§
+% The \emph{result} must be $0$ if the \emph{string} is true, and non zero if the \emph{string} is false.§
+% ``\emph{go to} |some macro|'' means: ``\emph{now expand} |some macro|''.
+%
+% \def\orbuffer{\textsc{or}-buffer}
+% \begin{enumerate}[label=\fbox{\Alph*},itemsep=12pt]
+%    \item |\bex@OR|
+%    \begin{enumerate}[label=\arabic*)]
+%       \item Split the \emph{string} into two parts:\\
+%       |#1| = before the first |\OR| (|#1| does not contain any |\OR|) \\
+%       |#2| = after the first |\OR|
+%      \item If |#2| is blank: the \emph{string} contains no |\OR|\\
+%           \hspace*{2em} then go to |\bex@AND| to test |\AND| relations in |#1| \\
+%      Otherwise: test the |\AND| relations in |#1| and keep |#2| in a so called ``\orbuffer'' for further testing.
+%    \end{enumerate}
+%    \item |\bex@AND| \\
+%       |#1| = \orbuffer\ for further testing if needed
+%       \begin{enumerate}[label=\arabic*)]
+%          \item Split the string ``before the first |\OR|'' (\ie the |#1| of A.1) into two parts:\\
+%             |#2| = before the first |\AND| (|#2| is an \textit{atomic expression}) \\
+%             |#3| = after the first |\AND| (|#3| does not contain any |\OR|)
+%          \item Then test |#2| (the \textit{atomic expression}):
+%          \begin{enumerate}[label=\textbullet\:]
+%             \item[TRUE:] \underline{If \Sharp3 is blank} then |#2| is either:
+%                   \begin{enumerate}[label=\textbullet,topsep=0pt,partopsep=0pt,itemsep=0pt,parsep=0pt]
+%                      \item an atomic expression alone
+%                      \item the last atomic expression in \emph{string}, preceded by |\OR|
+%                      \item an atomic expression preceded by |\OR| and followed by |\OR|
+%                   \end{enumerate}
+%              In each of these 3 cases, the whole expression (\ie the \textit{string}) is true
+%              because |#2| is true (otherwise, we had known the result of the whole \textit{string} earlier, and
+%              were not into testing |#2|) \\
+%                 \underline{Now if \Sharp3 is not blank} then |#2| is followed by |\AND|:\\
+%                 \hspace*{2em} go to |\bex@ANDAND| to test the series of |\AND|
+%             \item[FALSE:] \underline{if the \orbuffer\ \Sharp1 is blank} then |#2| is either:
+%                   \begin{enumerate}[label=\textbullet,topsep=0pt,partopsep=0pt,itemsep=0pt,parsep=0pt]
+%                      \item an atomic expression alone
+%                      \item an atomic expression followed a series of |\AND| (and no |\OR|)
+%                      \item the last atomic expression of the \emph{string}
+%                   \end{enumerate}
+%                In each or these 3 cases, the whole expression (\ie the \emph{string}) is false
+%                because |#2| is false (otherwise, the result would have been known earlier) \\
+%                \underline{Now if the \orbuffer\ \Sharp1 is not blank,} then we have to do more tests to get the result:\\
+%                \hspace*{2em} go to |\bex@OR| to split the \orbuffer\ (|#1| here) and continue testing...
+%          \end{enumerate}
+%       \end{enumerate}
+%  \item |\bex@ANDAND| \\
+%        |#1| is the \orbuffer\ for further testing if needed
+%          \begin{enumerate}[label=\arabic*)]
+%             \item Split the string (\ie |#3| in B.2.\textsc{true}) into two parts:\\
+%                 |#2| : before the first |\AND| (|#2| is an \textit{atomic expression}) \\
+%                 |#3| : after the first |\AND| \\ \clearpage
+%              \item Test the \textit{atomic expression} |#2|:
+%              \begin{enumerate}[label=\textbullet\:]
+%                \item [TRUE:] \underline{If \Sharp3 is blank} then |#2| is the last atomic expression of a series of |\AND|
+%                    (possibly followed by |\OR|). \\
+%                    Conclusion: the whole \emph{string} is true (otherwise, we would have concluded earlier
+%                    that it was false and were not into testing |#2|... think about it) \\
+%                 \underline{Now if \Sharp3 is not blank} then |#2| is followed by |\AND| and we have to test further:\\
+%                 \hspace*{2em} go to |\bex@ANDAND| to test |#3|.
+%
+%                \item [FALSE:] we do not have to test the following |\AND|: the |\AND|-connected series is false.\\
+%                    \underline{If the \orbuffer\ \Sharp1 is blank} then the whole \emph{string} is false. \\
+%                    \underline{Now if the \orbuffer\ \Sharp1 is not blank}: continue testing into this \orbuffer\ :\\
+%                                     \hspace*{2em} go to |\bex@OR|.
+%                \end{enumerate}
+%          \end{enumerate}
+%
+% \end{enumerate}
+%
+% \subsection{Category codes considerations}\label{catcodes}
+%
+% At first glance, the author of this package wanted to test inequality with the operator $\char33\!=$. A problem arose
+% because some languages make the character \char33\ active (f.ex. french). As far as babel changes the catcodes
+% |\AtBeginDocument|, the category code of \char33\ is different in the preamble (12) than in the document (13).
+%
+% After all, it was possible to change the definitions after begin document but... if you try to make the = character
+% active, you will (surprisingly) observe that a test like:§
+% \qquad|\ifnum 4=4 ok\fi|§
+% leads you to one of the following error messages:\parskip=0pt§
+% \begin{tabbing}
+%\qquad\=|undefined control sequence =|\qquad\= if |=| is undefined \\
+%\>|missing = inserted for \ifnum|\> if |=| is defined.
+% \end{tabbing}\restoreparskip
+%
+% The same apply for |<| or |>|. Therefore: such conditionals are possible for \TeX{} only if |=|\,,\,|<| and |>|
+% have a category code of 12 (11 is forbidden too).
+%
+% Thus the choice of |<>| is far easier and more reliable than the c-like $\char33\!=$.
+%
+% \subsection{Identification}
+%
+% This package is intended to use with a \LaTeX{} distribution of \eTeX{}.
+%
+%    \begin{macrocode}
+%<*package>
+\ProvidesPackage{boolexpr}
+   [2009/08/12 v2.1 Purely expandable boolean expressions and switch (eTeX)]
+%    \end{macrocode}
+% \iffalse
+%<package>
+% \fi
+%
+% \subsection{Special catcode}
+% The colon (:) will be used as a delimiter. We give it a category code of 4.
+% \iffalse
+%<package>% Make a colon (:) of catcode 4 (used as delimiter)
+% \fi
+%    \begin{macrocode}
+\let\bex@AtEnd\@empty
+\def\TMP@EnsureCode#1#2{%
+  \edef\bex@AtEnd{%
+    \bex@AtEnd
+    \catcode#1 \the\catcode#1\relax
+  }%
+  \catcode#1 #2\relax
+}
+\TMP@EnsureCode{42}{4}% :
+%    \end{macrocode}
+% \iffalse
+%<package>
+% \fi
+%
+% \subsection{Helper macros}
+%
+% While reading the \texttt{log} file it is preferable to read |\@firstoftwo|/|\@secondoftwo|
+% when the algorithm is making a choice (|\ifblank|) and |\bex@truepart|/|bex@falsepart|
+% when the algorithm has just determined the result of an atomic expression.
+% \iffalse
+%<package>% Five helper macros
+% \fi
+%    \begin{macrocode}
+\let\bex@truepart\@firstoftwo
+\let\bex@falsepart\@secondoftwo
+%    \end{macrocode}
+% \iffalse
+%<package>
+% \fi
+%
+%    \begin{macrocode}
+\def\bex@afterelse#1\else#2\fi{\fi#1}
+%    \end{macrocode}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\bex@ifblank}
+% The following macro is purely expandable and its code is most probably due to D. Arseneau (\xpackage{url.sty})
+%    \begin{macrocode}
+\begingroup\catcode`\|=3
+\long\gdef\bex@ifblank#1{\bex@ifbl@nk#1||\@secondoftwo\@firstoftwo:}
+\long\gdef\bex@ifbl@nk#1#2|#3#4#5:{#4}
+\endgroup
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\bex@ifblankdef}
+% It's just the same but expand once the control sequence given as an argument.
+%    \begin{macrocode}
+\long\def\bex@ifblankdef#1{\expandafter\bex@ifblank\expandafter{#1}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \subsection{Atomic expression evaluation}
+%
+% The six possible numeric atomic expressions\, $x < y$\,, $x<=y$\,, $x > y$\,, $x>=y$\,, $x<>y$\, and $x=y$ are first
+% transformed to their zero-form:§
+% |\numexpr| $x-y<0$\,,|\numexpr| $x-y>0$\,,|\numexpr| $x-y<>0$\,, |\numexpr| $x-y=0$\, etc.
+%
+% Before all, we need to know which relation is used in the atomic expression:
+%
+% \begin{macro}{\bex@rel}
+% |\bex@rel| tests an \textit{atomic expression}: first determine its type
+% (inferior to, superior to, equality, inequality, other |\boolexpr|) and then
+% use the appropriate evaluation macro:
+% \iffalse
+%<package>% \bex@rel tests each atomic expression: choose which evaluation macro to use first
+% \fi
+%    \begin{macrocode}
+\def\bex@rel#1{%
+   \bex@test@eval#1:
+      {\bex@eval{#1}}
+      {\bex@test@neq#1<>:
+         {\bex@test@infeq#1<=:
+            {\bex@test@inf#1<:
+               {\bex@test@supeq#1>=:
+                  {\bex@test@sup#1>:
+                     {\bex@test@eq#1=:
+                        {\@latex@error{Unknown relation found while scanning
+                           \noexpand\boolexpr!}\@ehd}
+                        {\bex@eq#1:}}
+                     {\bex@sup#1:}}
+                  {\bex@supeq#1:}}
+               {\bex@inf#1:}}
+            {\bex@infeq#1:}}
+         {\bex@neq#1:}}}
+%    \end{macrocode}
+%  \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+%  \begin{macro}{The test macros}
+% They test each \textit{atomic expression} in order to determine its type:
+% \iffalse
+%<package>% Tests macros to determine the type of each atomic expression
+% \fi
+%    \begin{macrocode}
+\def\bex@test@neq#1<>#2:{\bex@ifblank{#2}}
+\def\bex@test@eq#1=#2:{\bex@ifblank{#2}}
+\def\bex@test@infeq#1<=#2:{\bex@ifblank{#2}}
+\def\bex@test@inf#1<#2:{\bex@ifblank{#2}}
+\def\bex@test@supeq#1>=#2:{\bex@ifblank{#2}}
+\def\bex@test@sup#1>#2:{\bex@ifblank{#2}}
+\def\bex@test@eval#1#2:{%
+   \ifcat\noexpand#1\relax% #1 is a control sequence
+         \bex@afterelse\bex@test@Eval{#1}
+   \else \expandafter\@secondoftwo
+   \fi}
+\def\bex@test@Eval#1{\csname @%
+   \ifx#1\the second%
+   \else\ifx#1\numexpr second%
+   \else\ifx #1\number second%
+   \else\ifx #1\dimexpr second%
+   \else\ifx #1\glueexpr second%
+   \else\ifx #1\muexpr second%
+   \else first%
+   \fi\fi\fi\fi\fi\fi oftwo\endcsname}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{Evaluation macros}
+% They evaluate each \textit{atomic expression} according to its type:
+% \iffalse
+%<package>% Evaluation macro that evaluates an atomic expression depending on its type:
+% \fi
+%    \begin{macrocode}
+\def\bex@true@or@false#1{\csname bex@%
+   \ifnum\numexpr#1 true\else false\fi part\endcsname}
+\def\bex@false@or@true#1{\csname bex@%
+   \ifnum\numexpr#1 false\else true\fi part\endcsname}
+%    \end{macrocode}
+%
+% \iffalse
+%<package>
+% \fi
+%    \begin{macrocode}
+\def\bex@eq#1=#2:{\bex@true@or@false{#1-(#2)=0}}
+\def\bex@neq#1<>#2:{\bex@false@or@true{#1-(#2)=0}}
+\def\bex@infeq#1<=#2:{\bex@false@or@true{#1-(#2)>0}}
+\def\bex@inf#1<#2:{\bex@true@or@false{#1-(#2)<0}}
+\def\bex@supeq#1>=#2:{\bex@false@or@true{#1-(#2)<0}}
+\def\bex@sup#1>#2:{\bex@true@or@false{#1-(#2)>0}}
+\def\bex@eval#1{\bex@true@or@false{#1=0}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \subsection{\texttt{\textbf{\textbackslash AND}} and \texttt{\textbf{\textbackslash OR}} management}
+%
+% \begin{macro}{\bex@OR}
+% |\bex@OR| splits the string to evaluate into two parts: before the first |\OR| and after:
+% \iffalse
+%<package>% \bex@OR splits the string to evaluate into two parts: before the first \OR and after
+% \fi
+%    \begin{macrocode}
+\def\bex@OR#1\OR#2:{%
+      \bex@ifblank{#2}
+         {\bex@AND{}#1\AND:}
+         {\expandafter\bex@AND\expandafter{\bex@removeOR#2:}#1\AND:}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{bex@removeOR}
+% Just remove the extra |\OR:| inserted into the argument of |\bex@OR|:
+% \iffalse
+%<package>% \remove@OR removes the extra \OR: inserted into the argument of \bex@OR
+% \fi
+%    \begin{macrocode}
+\def\bex@removeOR#1\OR:{#1}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\bex@AND}
+% |\bex@AND| splits the string to evaluate into two parts: before the first |\AND| and after:
+% \iffalse
+%<package>% \bex@AND splits the string to evaluate into two parts: before the first \AND and after:
+% \fi
+%    \begin{macrocode}
+\def\bex@AND#1#2\AND#3:{%
+   \bex@rel{#2}
+      {\bex@ifblank{#3}
+         {0}
+         {\bex@ANDAND{#1}#3:}}
+      {\bex@ifblank{#1}{+1}{\bex@OR#1 \OR:}}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\bex@ANDAND}
+% |\bex@ANDAND| evaluate successive \textit{atomic expressions} related by |\AND| until
+% false is found or until the end if every expression is true:
+% \iffalse
+%<package>% \bex@ANDAND evaluate successive atomic expressions related by \AND:
+% \fi
+%    \begin{macrocode}
+\def\bex@ANDAND#1#2\AND#3:{%
+   \bex@rel{#2}
+      {\bex@ifblank{#3}{+0}{\bex@ANDAND{#1}#3:}}
+      {\bex@ifblank{#1}{+1}{\bex@OR#1 \OR:}}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\boolexpr}
+% |\boolexpr| is the entry point for evaluating boolean expressions:
+% \iffalse
+%<package>% \boolexpr: the entry point for evaluating boolean expressions
+% \fi
+%    \begin{macrocode}
+\newcommand\boolexpr[1]{\bex@ifblank{#1}{1}{\numexpr\bex@OR#1 \OR:+0}}
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\@first@or@second}
+%
+%    \begin{macrocode}
+\newcommand\bex@first@or@second[1]{%
+   \csname bex@\ifnum\boolexpr{#1}=0 true\else false\fi part\endcsname}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\ifboolexpr}
+% |\ifboolexpr| is the \LaTeX{} form of |\boolexpr| tests:
+% \iffalse
+%<package>% \ifboolexpr: the LaTeX form of \boolexpr tests
+% \fi
+%    \begin{macrocode}
+\newcommand\ifboolexpr{}
+\let\ifboolexpr\bex@first@or@second
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%<package>
+% \fi
+%
+% \begin{macro}{\switch}
+% \cs{switch} is not long to implement... see:
+%    \begin{macrocode}
+\def\switch#1\endswitch{\bex@ifblank{#1}{}%
+   {\bex@switch@otherwise#1\otherwise\endswitch}}
+
+\def\bex@switch@otherwise#1\otherwise#2\endswitch{%
+   \bex@switch@case#1\case\endswitch
+      {\bex@ifblank{#2}{}{\bex@otherwise#2\endswitch}}
+      \endswitch}
+   
+\def\bex@switch@case#1\case#2\endswitch{%
+   \bex@ifblank{#1}
+      {\bex@ifblank{#2}{\@firstoftwo}{\bex@switch@case#2\endswitch}}
+      {\case#1\endcase
+      {\bex@ifblank{#2}{\@firstoftwo}{\bex@switch@case#2\endswitch}}%
+      }}
+
+\def\case#1#2\endcase{%
+   \ifboolexpr{#1}{\bex@after@endswitch{#2}}}
+
+\def\bex@after@endswitch#1#2\endswitch{#1}
+\def\bex@otherwise#1\otherwise#2\endswitch{#1}
+%    \end{macrocode}
+% \end{macro}
+%
+% Restore original catcode:
+% \iffalse
+%<package>% Restore original catcode
+% \fi
+%    \begin{macrocode}
+\bex@AtEnd
+%</package>
+%    \end{macrocode}
+%
+% \subsection{Future developments : to do}
+%
+% \xpackage{boolexpr} should work either with \eTeX{} or \eTeX-\LaTeX{}...
+%
+% May be build a ``real'' |\NOT| operator.
+%
+% \begin{History}
+%
+%   \begin{Version}{2009/08/12 v2.1}
+%   \item
+%    Added the \cs{switch} syntax
+%   \item
+%    Small bug (|\numexpr| forgotten in the ``list of exceptions'' (\cs{bex@test@Eval})
+%   \item
+%   Redesigned tests for better compilation
+%   \end{Version}
+%
+%   \begin{Version}{2009/07/22 v1.0}
+%   \item
+%     First version.
+%   \end{Version}
+%
+% \end{History}
+%
+% \PrintIndex
+%
+% \label{LastPage}
+% \Finale
\ No newline at end of file
diff --git a/Master/texmf-dist/source/latex/boolexpr/boolexpr.ins b/Master/texmf-dist/source/latex/boolexpr/boolexpr.ins
new file mode 100644
index 00000000000..f256e0b6bb6
--- /dev/null
+++ b/Master/texmf-dist/source/latex/boolexpr/boolexpr.ins
@@ -0,0 +1,81 @@
+%%
+%% This is file `boolexpr.ins',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% boolexpr.dtx  (with options: `install')
+%% 
+%% This is a generated file.
+%% 
+%% boolexpr : a purely expandable boolean expressions and switch (eTeX)
+%% 
+%% This work 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
+%% 
+%% Copyright (C) 2009 by Florent Chervet <florent.chervet@free.fr>
+%% 
+%% This work consists of the main source file boolexpr.dtx
+%% and the derived files
+%%    boolexpr.sty, boolexpr.pdf, boolexpr.ins,
+%% 
+%% boolexpr : a purely expandable boolean expressions and switch  (eTeX)
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: boolexpr 2009/08/12 v2.1 provides purely expandable boolean expressions and switch (eTeX)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+boolexpr : a purely expandable boolean expressions and switch (eTeX)
+
+This work 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
+
+Copyright (C) 2009 by Florent Chervet <florent.chervet@free.fr>
+
+This work consists of the main source file boolexpr.dtx
+and the derived files
+   boolexpr.sty, boolexpr.pdf, boolexpr.ins,
+
+boolexpr : a purely expandable boolean expressions and switch  (eTeX)
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+  \file{boolexpr.ins}{\from{boolexpr.dtx}{install}}%
+  \file{boolexpr.sty}{\from{boolexpr.dtx}{package}}%
+}
+
+\obeyspaces
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{*     boolexpr.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `boolexpr.dtx'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+\endinput
+%%
+%% End of file `boolexpr.ins'.