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-% \iffalse
-%% File: ldcsetup.dtx (C) Copyright 1999 Frank Mittelbach, Chris Rowley, David Carlisle
-%% (C) Copyright 2004-2007 Frank Mittelbach, LaTeX3 Project
-%%
-%% It may be distributed and/or modified under the conditions of the
-%% LaTeX Project Public License (LPPL), either version 1.3c of this
-%% license or (at your option) any later version. The latest version
-%% of this license is in the file
-%%
-%% http://www.latex-project.org/lppl.txt
-%%
-%% This file is part of the ``xbase bundle'' (The Work in LPPL)
-%% and all files in that bundle must be distributed together.
-%%
-%% The released version of this bundle is available from CTAN.
-%%
-%% -----------------------------------------------------------------------
-%%
-%% The development version of the bundle can be found at
-%%
-%% http://www.latex-project.org/cgi-bin/cvsweb.cgi/
-%%
-%% for those people who are interested.
-%%
-%%%%%%%%%%%
-%% NOTE: %%
-%%%%%%%%%%%
-%%
-%% Snapshots taken from the repository represent work in progress and may
-%% not work or may contain conflicting material! We therefore ask
-%% people _not_ to put them into distributions, archives, etc. without
-%% prior consultation with the LaTeX Project Team.
-%%
-%% -----------------------------------------------------------------------
-%%
-%<*driver|package>
-\RequirePackage{l3names}
-%</driver|package>
-%\fi
-\GetIdInfo$Id: ldcsetup.dtx 636 2007-09-12 20:03:06Z mittelba $
- {coding conventions and stuff}
-%\iffalse
-%<*driver>
-%\fi
-\ProvidesFile{\filename.\filenameext}
- [\filedate\space v\fileversion\space\filedescription]
-%\iffalse
-\documentclass{ltxdoc}
-\begin{document}
-\DocInput{ldcsetup.dtx}
-\end{document}
-%</driver>
-% \fi
-%
-% \CheckSum{0}
-%
-% \title{The \textsf{ldcsetup} package\thanks{This file
-% has version number \fileversion, last
-% revised \filedate.}}
-% \author{DPC, FMi}
-% \date{\filedate}
-% \maketitle
-%
-% \begin{abstract}
-% Basic code shared by several other packages currently under development.
-% \end{abstract}
-%
-% \StopEventually{}
-%
-% \begin{macrocode}
-%<*package>
-\ProvidesExplPackage
- {\filename}{\filedate}{\fileversion}{\filedescription}
-% \end{macrocode}
-% \begin{macrocode}
-\RequirePackage{keyval,l3calc}
-\ExplSyntaxOff
-% \end{macrocode}
-%
-% \section{Ignoring White Space}
-% Within a package, or in a document preamble, you can use
-% |\IgnoreWhiteSpace| this makes white space ignored, and |@|
-% a letter, and |~| a space character. It lasts until the end of the
-% current package or preamble.
-%
-%% Puts an ignored space at the end of the line, so `|\ |' does the right
-% thing. (Perhaps should instead just change catcode of |^^M|)
-% \begin{macrocode}
-\def\IgnoreWhiteSpace{%
- \edef\@tempa{%
- \catcode`\noexpand\~=\the\catcode`\~\relax
- \catcode`\noexpand\ =\the\catcode`\ \relax
- \catcode`\noexpand\^^I=\the\catcode`\^^I\relax
- \catcode`\noexpand\@=\the\catcode`\@\relax
- \endlinechar=\the\endlinechar\relax
- }%
- \ifx\@currname\@empty
- \expandafter\AtBeginDocument\expandafter{\@tempa}%
- \else
- \expandafter\AtEndOfPackage\expandafter{\@tempa}%
- \fi
- \catcode`\~=10\relax
- \catcode`\ =9\relax
- \catcode`\^^I=9\relax
- \makeatletter
- \endlinechar=` %
- \relax
-}
-% \end{macrocode}
-% The new syntax requires |:| and |_| to be letters; instead of
-% putting that into |\IgnoreWhiteSpace| we make a new command which
-% helps to gradually change packages from old to new syntax.
-% \begin{macrocode}
-\def\InternalSyntaxOn{%
- \edef\@tempa{%
- \catcode`\noexpand\~=\the\catcode`\~\relax
- \catcode`\noexpand\ =\the\catcode`\ \relax
- \catcode`\noexpand\^^I=\the\catcode`\^^I\relax
- \catcode`\noexpand\@=\the\catcode`\@\relax
- \catcode`\noexpand\:=\the\catcode`\:\relax
- \catcode`\noexpand\_=\the\catcode`\_\relax
- \endlinechar=\the\endlinechar\relax
-%FMi fix is not properly reset
- \endlinechar=13\relax
- }%
-%%% ????
-% this needs further work, don't think it is working
- \ifx\InternalSyntaxOff\relax
- \expandafter\def\expandafter\InternalSyntaxOff\expandafter
- {\@tempa\let\InternalSyntaxOff\relax}%
- \fi
- \ifx\@currname\@empty
- \expandafter\AtBeginDocument\expandafter{\@tempa}%
- \else
- \expandafter\AtEndOfPackage\expandafter{\@tempa}%
- \fi
- \catcode`\~=10\relax
- \catcode`\ =9\relax
- \catcode`\^^I=9\relax
- \makeatletter
- \catcode`\_=11\relax
- \catcode`\:=11\relax
- \endlinechar=` %
- \relax
-}
-\let\InternalSyntaxOff\relax
-% \end{macrocode}
-%
-% Do it for this package.
-% \begin{macrocode}
-%\InternalSyntaxOn
-\ExplSyntaxOn
-% \end{macrocode}
-%
-% \section{KV fixes}
-% Allow\footnote{Not needed now?} key names to start with |\|.
-% \begin{macrocode}
-\def\define@key#1#2{%
- \@ifnextchar[
- {\KV@def{#1}{\string#2}}
- {\@namedef{KV@#1@\string#2}####1}}
-\def\setkeys#1#2{%
- \def\KV@prefix{KV@#1@\expandafter\string}%
- \KV@do#2,\relax,}
-% \end{macrocode}
-%
-% Make KV |#| safe.
-% \begin{macrocode}
-% \end{macrocode}
-%
-% \begin{macrocode}
-\newtoks\KV@toks
-% \end{macrocode}
-%
-% \begin{macrocode}
-\def\KV@@sp@c#1\@nil#2\relax#3{\KV@toks{#1}\edef#3{\the\KV@toks}}
-% \end{macrocode}
-%
-% Generate error messages on missing `,'.
-%
-% More exactly if two `=' appear after a key generate an error.
-% The current KV just silently ignores everything after the second `='.
-% \begin{macrocode}
-\def\KV@equal{=}
-% \end{macrocode}
-%
-% \begin{macrocode}
-\def\KV@split#1=#2=#3\relax{%
- \KV@@sp@def\@tempa{#1}%
- \def\@tempd{#3}%
- \ifx\@tempa\@empty\else
- \expandafter\let\expandafter\@tempc
- \csname\KV@prefix\@tempa\endcsname
- \ifx\@tempc\relax
- \KV@error{\@tempa\space \expandafter\@gobbletwo\string\@undefined}\@eha
- \else
- \ifx\@tempd\@empty
- \KV@default
- \else
- \KV@@sp@def\@tempb{#2}%
- \ifx\@tempd\KV@equal
- \expandafter\@tempc\expandafter{\@tempb}\relax
- \else
- \KV@error{Extra~=~ sign~ after~ `#1'}\KV@erry
- \fi
- \fi
- \fi
- \fi}
-% \end{macrocode}
-%
-% \begin{macrocode}
-\def\KV@erry{\expandafter\KV@errx\meaning\@tempd\relax ignored\MessageBreak
- missing~comma~in~`\expandafter\strip@prefix\meaning\@tempb'~?}
-% \end{macrocode}
-%
-% \begin{macrocode}
-\def\KV@errx#1>#2==\relax{%
- `#2' }
-% \end{macrocode}
-%
-% \begin{macrocode}
-\def\KV@default{%
- \expandafter\let\expandafter\@tempb
- \csname\KV@prefix\@tempa @default\endcsname
- \ifx\@tempb\relax
- \KV@error{No value specified for \@tempa}\@eha
- \else
- \@tempb\relax
- \fi}
-% \end{macrocode}
-%
-% \LaTeX\ style error message.
-% \begin{macrocode}
-\def\KV@error#1#2{\PackageError{keyval}{#1}{#2}}
-% \end{macrocode}
-%
-% Instead of doing a full KV parse, and evaluating all the keys,
-% you might want to parse a parameter list, even for undefined keys,
-% removing spaces, splitting up the `,` and `=' and resolving cases
-% where no value is supplied. This is used in |\DeclareGenericFunction|
-% which \emph{defines} a set of keys via such a KV parse.
-%
-% A setting of |, key = value ,| will result in |\KV@elt{key}{value}|
-% being added to the list, a seting of |, key ,| will result in
-% |\KV@default@elt{key}| being added. At the end of the parse the list
-% is executed. No keys are checked at this stage (so no csnames are used
-% up) the two |\KV|\ldots|@elt| commands must be defined as appropriate.
-%
-% \begin{macrocode}
-\def\KV@parse#1{
- \begingroup
-% \end{macrocode}
-%
-% Locally fudge |\KV@@def| to just add to a token register
-% rather than make a definition.
-% \begin{macrocode}
-\def\KV@@sp@c##1\@nil##2\relax##3{\addto@hook##3{{##1}}}
-% \end{macrocode}
-%
-% Locally fudge |\KV@split| to just add to a token register
-% rather than execute the code for the found keys.
-% \begin{macrocode}
-\def\KV@split##1=##2=##3\relax{%
- \def\@tempd{##3}%
- \expandafter\ifx\expandafter=\@firstofone##1=\else
- \ifx\@tempd\@empty
- \addto@hook\KV@toks\KV@default@elt
- \KV@@sp@def\KV@toks{##1}%
- \else
- \ifx\@tempd\KV@equal
- \addto@hook\KV@toks\KV@elt
- \KV@@sp@def\KV@toks{##1}%
- \KV@@sp@def\KV@toks{##2}%
- \else
- \KV@err{Extra `=' after `##1'}\@ehd
- \fi
- \fi
- \fi}
-% \end{macrocode}
-%
-% Initialise
-% \begin{macrocode}
- \KV@toks{}
-% \end{macrocode}
-% Do the parse
-% \begin{macrocode}
- \KV@do#1,\relax,
-% \end{macrocode}
-% Evaluate the token register outside the group.
-% \begin{macrocode}
- \expandafter
- \endgroup
- \the\KV@toks}
-% \end{macrocode}
-%
-% \section{Calc fixes}
-%
-% Count Register assignments via calc. Here we also provide some
-% global versions since a normal global prefix won't have any effect.
-% \begin{macrocode}
-\let:NN \SetInternalCounter \calc_int_set:Nn
-\let:NN \GSetInternalCounter\calc_int_gset:Nn
-% \end{macrocode}
-%
-%
-% \section{Misc code that is best collected in one place}
-%
-% This section will receive odd code that would be of potential use to
-% other packages and should eventually made it to the kernel
-% (perhaps).
-%
-% \begin{macro}{\UndeclareRobustCommand}
-% Remove a robust command from memory if it isn't used any
-% longer. Of course this doesn't free the hash table but at least
-% the space gets reclaimed.
-% \begin{macrocode}
-\def\UndeclareRobustCommand#1{%
- \cs_gundefine:N #1
- \exp_args:Nc \cs_gundefine:N {\cs_to_str:N #1~}
-}
-% \end{macrocode}
-% \end{macro}
-%
-%
-% \begin{macrocode}
-%</package>
-% \end{macrocode}
-%
-% \Finale
-%