% \iffalse meta-comment
%

%
% hyphenat.dtx
% Author: Peter Wilson (CUA) now at peter.r.wilson@boeing.com until June 2004
%                            (or at: pandgwilson at earthlink dot net) 
% Copyright 1998 --- 2004 Peter R. Wilson
%
% 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 the license is in
%    http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of
% LaTeX version 2003/06/01 or later.
%
% This work has the LPPL maintenance status "author-maintained".
%
% This work consists of the files listed in the README file.
%
% 
%<*driver>
\documentclass{ltxdoc}
\EnableCrossrefs
\CodelineIndex
\setcounter{StandardModuleDepth}{1}
\begin{document}
  \DocInput{hyphenat.dtx}
\end{document}
%</driver>
%
% \fi
%
% \CheckSum{401}
%
% \DoNotIndex{\',\.,\@M,\@@input,\@addtoreset,\@arabic,\@badmath}
% \DoNotIndex{\@centercr,\@cite}
% \DoNotIndex{\@dotsep,\@empty,\@float,\@gobble,\@gobbletwo,\@ignoretrue}
% \DoNotIndex{\@input,\@ixpt,\@m}
% \DoNotIndex{\@minus,\@mkboth,\@ne,\@nil,\@nomath,\@plus,\@set@topoint}
% \DoNotIndex{\@tempboxa,\@tempcnta,\@tempdima,\@tempdimb}
% \DoNotIndex{\@tempswafalse,\@tempswatrue,\@viipt,\@viiipt,\@vipt}
% \DoNotIndex{\@vpt,\@warning,\@xiipt,\@xipt,\@xivpt,\@xpt,\@xviipt}
% \DoNotIndex{\@xxpt,\@xxvpt,\\,\ ,\addpenalty,\addtolength,\addvspace}
% \DoNotIndex{\advance,\Alph,\alph}
% \DoNotIndex{\arabic,\ast,\begin,\begingroup,\bfseries,\bgroup,\box}
% \DoNotIndex{\bullet}
% \DoNotIndex{\cdot,\cite,\CodelineIndex,\cr,\day,\DeclareOption}
% \DoNotIndex{\def,\DisableCrossrefs,\divide,\DocInput,\documentclass}
% \DoNotIndex{\DoNotIndex,\egroup,\ifdim,\else,\fi,\em,\endtrivlist}
% \DoNotIndex{\EnableCrossrefs,\end,\end@dblfloat,\end@float,\endgroup}
% \DoNotIndex{\endlist,\everycr,\everypar,\ExecuteOptions,\expandafter}
% \DoNotIndex{\fbox}
% \DoNotIndex{\filedate,\filename,\fileversion,\fontsize,\framebox,\gdef}
% \DoNotIndex{\global,\halign,\hangindent,\hbox,\hfil,\hfill,\hrule}
% \DoNotIndex{\hsize,\hskip,\hspace,\hss,\if@tempswa,\ifcase,\or,\fi,\fi}
% \DoNotIndex{\ifhmode,\ifvmode,\ifnum,\iftrue,\ifx,\fi,\fi,\fi,\fi,\fi}
% \DoNotIndex{\input}
% \DoNotIndex{\jobname,\kern,\leavevmode,\let,\leftmark}
% \DoNotIndex{\list,\llap,\long,\m@ne,\m@th,\mark,\markboth,\markright}
% \DoNotIndex{\month,\newcommand,\newcounter,\newenvironment}
% \DoNotIndex{\NeedsTeXFormat,\newdimen}
% \DoNotIndex{\newlength,\newpage,\nobreak,\noindent,\null,\number}
% \DoNotIndex{\numberline,\OldMakeindex,\OnlyDescription,\p@}
% \DoNotIndex{\pagestyle,\par,\paragraph,\paragraphmark,\parfillskip}
% \DoNotIndex{\penalty,\PrintChanges,\PrintIndex,\ProcessOptions}
% \DoNotIndex{\protect,\ProvidesClass,\raggedbottom,\raggedright}
% \DoNotIndex{\refstepcounter,\relax,\renewcommand,\reset@font}
% \DoNotIndex{\rightmargin,\rightmark,\rightskip,\rlap,\rmfamily,\roman}
% \DoNotIndex{\roman,\secdef,\selectfont,\setbox,\setcounter,\setlength}
% \DoNotIndex{\settowidth,\sfcode,\skip,\sloppy,\slshape,\space}
% \DoNotIndex{\symbol,\the,\trivlist,\typeout,\tw@,\undefined,\uppercase}
% \DoNotIndex{\usecounter,\usefont,\usepackage,\vfil,\vfill,\viiipt}
% \DoNotIndex{\viipt,\vipt,\vskip,\vspace}
% \DoNotIndex{\wd,\xiipt,\year,\z@}
%
% \changes{v11}{1997/09/30}{Output character table to class and package files only}
% \changes{v2.3}{2001/01/02}{Fixed problem with non-CMR fonts doing double hyphens}
% \changes{v2.3b}{2004/04/22}{Updated license and contact details}
%
% \def\dtxfile{hyphenat.dtx}
% ^^A \def\fileversion{v2.3}
% ^^A \def\filedate{1999/02/13}
% \def\fileversion{v2.3a}
% \def\filedate{2001/01/02}
% \def\fileversion{v2.3b}
% \def\filedate{2004/04/22}
% \newcommand*{\Lpack}[1]{\textsf {#1}}           ^^A typeset a package
% \newcommand*{\Lopt}[1]{\textsf {#1}}            ^^A typeset an option
% \newcommand*{\file}[1]{\texttt {#1}}            ^^A typeset a file
% \newcommand*{\Lcount}[1]{\textsl {\small#1}}    ^^A typeset a counter
% \newcommand*{\pstyle}[1]{\textsl {#1}}          ^^A typeset a pagestyle
% \newcommand*{\Lenv}[1]{\texttt {#1}}            ^^A typeset an environment
%
% \title{The \Lpack{hyphenat} package\thanks{This
%        file (\texttt{\dtxfile}) has version number \fileversion, last revised
%        \filedate.}}
%
% \author{%
% Peter Wilson\thanks{After May 2004 at: \texttt{pandgwilson at earthlink dot net}}\\
% Catholic University of America \\
% Now at \texttt{peter.r.wilson@boeing.com}
% }
% \date{\filedate}
% \maketitle
% \begin{abstract}
%    The \Lpack{hyphenat} package can be used to either disable hyphenation
% throughout a document or to enable automatic hyphenation within words
% that include analphabetic characters. It also provides for hyphenatable
% monospaced fonts.
% \end{abstract}
% \tableofcontents
%
% \StopEventually{}
%
% 
%
% \section{Introduction}
%
% Questions about hyphenation seem to pop up fairly regularly on
% \texttt{comp.text.tex} newsgroup. Broadly speaking the questions
% take one of two forms:
% \begin{itemize}
% \item How can I disable hyphenation in my document?
% \item How can I enable hyphenation after the character \ldots ?
% \end{itemize}
%  The \Lpack{hyphenat} package attempts to provide solutions for
% both of these questions. This package is an extension of the
% \Lpack{uschyp} package which was developed as part of a class
% and package bundle for typesetting ISO standards~\cite{PRW96i}.
% This manual is typeset according to the conventions of the
% \LaTeX{} \textsc{docstrip} utility which enables the automatic
% extraction of the \LaTeX{} macro source files~\cite{GOOSSENS94}.
%
%    Section~\ref{sec:usc} describes a package to enable `words'
% containing analphabetic characters to be automatically hyphenated,
% or to disable hyphenation throught a document or just disable
% it for short pieces of text. It also enables hyphenation, if required,
% of text typeset using monospaced (TT) fonts. For convenience I use TT
% to mean a monospaced font; TT does \emph{not} indicate TrueType fonts.
% Commented source code for the package is in Section~\ref{sec:code}.
%
% \section{The \Lpack{hyphenat} package} \label{sec:usc}
%
%    The \Lpack{hyphenat} package has an option called \Lopt{none}.
% Use of this option prevents any hyphenation throughout the document.
% If \TeX{} is prevented from hyphenating it may complain about bad
% line breaks and you may find bits of text sticking out into the
% margin. If you use this option you should also consider using
% |\sloppy| and/or |\raggedright|.
%
% The other option, \Lopt{htt}, enables hyphenation of text typeset
% using Computer Modern Typewriter fonts (or their equivalent, such as
% Adobe Courier). 
% If this option is used, then text typeset via
% either |\texttt| or |\ttfamily| will be in the default TT font and
% may be automatically hyphenated. Note that this will not affect any
% TT text typeset by either |\verb| or in a |verbatim| environment
% because they locally inhibit hyphenation. If you use this option
% you are likely to get a lot of \texttt{Font Warning} messages about
% being unable to load a font. It is reasonably safe to suggest that you
% can ignore these.
%
% \DescribeMacro{\textnhtt}
% \DescribeMacro{\nhttfamily}
% The command |\textnhtt{|\meta{text}|}| will typeset \meta{text} in
% the default TT font with no automatic hyphenation. It has the same
% effect as |\texttt| when the \Lopt{htt} option is not used.
% The |\nhttfamily| declaration is a companion to the |\textnhtt| command
% and is analagous to the |\ttfamily| declaration in that it prevents
% any hyphenation of TT fonts. For example, if the Courier font is used
% as the monospaced font instead of the CM typewriter font, then hyphenation
% may occur with the Courier in places where it wouldn't with CM. The command
% or environment may be used to ensure that Courier is treated the same as
% CM regarding hyphenation.
%
% \DescribeMacro{\nohyphens}
% The command |\nohyphens{|\meta{text}|}| will typeset \meta{text} without
% any automatic hyphenation. This is intended to be used for short pieces
% of text.
%
%    An \textit{analphabetic} character is a character than does not appear
% in the alphabet. Analphabetic characters include the numerals and 
% punctuation characters. If a `word' contains any analphabetic characters,
% \TeX's automatic hyphenation capability is disabled for any syllables
% following the (first) of the analpabetic characters in the word.
% Words containing analphabetic characters often occur as the names
% of variables in computer programs, and of course, as URLs on the Web.
% The \Lopt{hyphenat} package provides several commands enabling automatic
% hyphenation of words containing analphabetics.
%
% \DescribeMacro{\_}
%  In \LaTeX{} a `word' containing an underscore 
%  (e.g., |`letters_with_underscores'|) can be hyphenated at
%  the underscore by using a discretionary hyphen. That is, write the
% word like |letters\_\-with\_\-underscores|. This has two potential
% disadvantages: (a) more typing is involved, and (b) if the word is broken
% at one underscore, hyphenation of any succeeding syllables is disabled.
% The \Lpack{hyphenat} package redefines the |\_| command so that hyphenation
% can automatically occur after an underscore and further hyphenation
% within the word is not disabled. Thus, this example word can just be
% written as |letters\_with\_underscores|.
%
%    Note that following the revised |\_| command with a discretionary hyphen
% makes its behaviour revert to the \LaTeX{} default.
%
% \DescribeMacro{\bshyp}
%    The |\bshyp| command can be used to print a backslash and have
% following hyphenation.
% 
% \DescribeMacro{\fshyp}
%    The |\fshyp| command can be used to print a forward slash and have
% following hyphenation.
% 
% \DescribeMacro{\dothyp}
%    The |\dothyp| command can be used to print a period (full stop) and have
% following hyphenation.
% 
% \DescribeMacro{\colonhyp}
%    The |\colonhyp| command can be used to print a colon and have
% following hyphenation.
%
% 
%    For example, to typeset |first\second/third.fourth:fifth_sixth|,
% allowing hyphenation at the analphabetic characters the source would be:
% \begin{verbatim}
% first\bshyp{}second\fshyp{}third\dothyp{}fourth\colonhyp{}fifth\_sixth
% \end{verbatim}
%
% \DescribeMacro{\hyp}
%    \TeX{} does not want to hyphenate a word that appears in the source
% already hyphenated, such as |electromagnetic-endioscopy|.
%    The |\hyp| command is like the other |\...hyp| commands, only it
% typesets a hyphen and allows full automatic hyphenation of the other
% words forming the compound word. It is used like
% |electromagnetic\hyp{}endioscopy|.
%
%
% \section{The package code} \label{sec:code}
%
% \changes{v2.1}{1998/10/14}{Renamed the package from uschyp to hyphenat}
% \changes{v2.2}{1998/12/31}{Added hyphenation of TT fonts}
% \changes{v2.3}{1999/02/13}{Added hyp command}
%
%    Announce the name and version of the package, which requires
% \LaTeXe.
%    \begin{macrocode}
%<*usc>
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{hyphenat}[2001/01/02 v2.3a hyphenation utilities]
%    \end{macrocode}
%
%    An option is provided whereby all hyphenation throught a document
%    is disabled.
% \changes{v2.1}{1998/10/14}{Added the `none' option}
% Hyphenation throughout a document can be disabled in at least the following
% ways:
% \begin{enumerate}
% \item Set |\exhyphenpenalty| and |\hyphenpenalty| to 10000 
%       (the \textit{\TeX book} exercise 14.6);
% \item Use an `unknown' language (i.e., one that has no hyphenation
%   patterns, but for a complete document this would cause problems
%   if a package like \Lpack{babel} was used);
% \item Set |\lefthyphenmin| and |\righthyphenmin| to large values (see
%   \file{lthyphen.dtx}) to prevent hypenation in the first |\lefthyphenmin|
%    characters and in the last |\righthyphenmin| characters.
% \end{enumerate}
% I have chosen the \textit{\TeX book} solution for global hyphenation 
% suppression as it is generic.
%    \begin{macrocode}
\DeclareOption{none}%
    {\hyphenpenalty=10000\exhyphenpenalty=10000\relax}
%    \end{macrocode}
% \changes{v2.2}{1998/12/31}{Added the `htt' option}
% \changes{v2.2a}{1999/01/30}{Added warning with the `htt' option}
%     An option is provided whereby TT text may be hyphenated. 
% See~\S\ref{sec:tt} for how it is implemented via the |\touchttfonts|
% and |\touchextrattfonts| commands. At the end we have to ensure that the
% normal text font is selected.
%    \begin{macrocode} 
\DeclareOption{htt}{%
  \PackageWarningNoLine{hyphenat}{%
      *******************************\MessageBreak
      * You have used the htt option.\MessageBreak
      * You are likely to get many Font Warning messages.\MessageBreak
      * These can usually be ignored.\MessageBreak
      *******************************}
  \AtBeginDocument{\touchttfonts\touchextrattfonts\normalfont}}
\ProcessOptions
%    \end{macrocode}
%
% \begin{macro}{\langwohyphens}
% We will use a non-existant language as a local means of disabling 
% hyphenation.
%    \begin{macrocode}
\newlanguage\langwohyphens
%    \end{macrocode}
% \end{macro}
%
%    This package redefines the |\_| command to include a
%    discretionary hyphen.\footnote{Thanks to Donald Arseneau for pointing
%    the author in the right direction.} 
%    The new definition provides for full hyphenation throughout 
%    a construct such as |long\_identifier|.
%    The default \LaTeX{} behaviour
%    is that this kind of construct has to be written as
%    as |long\_\-identifier| if hyphenation
%    is to be enabled at the position of the underscore; this also
%    switched off hypenation after the first use of |\_| or
%    |_\-| within the construct.
%
%    Users of this package must not use a discretionary hyphen
%    in conjunction with an underscore.
%
%    The behaviour of |_| as a subscript command in math mode is
%    unaffected as is the use of a naked |_| in text (an error).
%
%    The original attempt was to enable a naked |_| to be used in
%    ordinary text. The code for this follows. The problem that arose
%    with this was that, for example, |\input{long_filename}| would
%    fail. With the original code, a naked |_| could not be used
%    in |\label|, |\cite| or |\ref| commands as |\protect| is not
%    properly enabled in these commands.
%    \begin{verbatim}
%    % uscaslet.sty
%    % (Email from Donald Arseneau 10 October 1997)
%    \newcommand{\BreakableUnderscore}{\leavevmode
%    \nobreak\hskip\z@skip
%    \textunderscore
%    \-\nobreak\hskip\z@skip}
%    \def\UnderOrSub0{\ifmmode\sb\else\BreakableUnderscore\fi}
%    \AtBeginDocument{\catcode`\_\active}
%    \begingroup\catcode`\_\active
%    \@firstofone{\endgroup\def_{\protect\UnderOrSub0}}
%    \DeclareRobustCommand{\_}{%
%      \ifmmode\nfss@text{\textunderscore}\else\BreakableUnderscore\fi}
%    \endinput
%    \end{verbatim}
%  Donald Arseneau has since developed his \Lopt{underscore} package,
%  available on CTAN, that eliminates the above problems.
%
% \changes{v2}{1997/11/30}{Removed the uschypne package}
%
%    Now for the \Lopt{hyphenat} version. This is reduced from Donald Arseneau's code 
%    (Email from him on Friday 10 October 1997) with my comments.
%
%    This version includes macros for breakable backslashes,
%    forward slashes and periods as well as underscores.
%
% \begin{macro}{\prw@zbreak}
%    |\prw@zbreak| is just defined to save some potential typos further on.
%    \begin{macrocode}
\newcommand{\prw@zbreak}{\nobreak\hskip\z@skip}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\BreakableUnderscore}
%    This macro adds a discretionary hyphen after an underscore. As Ray 
% Goult discovered, using the shorthand |\-| for |\discretionary{-}{}{}|
% causes problems in a \Lenv{tabbing} environment which modifies the
% definition of |\-|, so we have to use the long form.
% \changes{v2}{1997/11/30}{Changed use of \cs{-} to \cs{discretionary}}
%    \begin{macrocode}
\newcommand{\BreakableUnderscore}{\leavevmode%
  \prw@zbreak\textunderscore\discretionary{-}{}{}\prw@zbreak}
%    \end{macrocode}
% \end{macro}
%
%    The next bit of Donald Arseneau's code preserves any following spaces
%    (yes, that is a zero at the
%    end of the command name). Unfortunately this is not required any more.
%    \begin{verbatim}
%    \def\UnderOrSub0{\ifmmode\sb\else\BreakableUnderscore\fi}
%    \end{verbatim}
%    Originally the underscore was made active only at the beginning 
%    of the document
%    to avoid possibly upsetting other packages that had been loaded:
%    \begin{verbatim}
%    \AtBeginDocument{\catcode`\_\active}
%    \end{verbatim}
%    but this broke input of files with names that included underscores.
%    Next a new underscore command was defined.
%    \begin{verbatim}
%    \begingroup\catcode`\_\active
%    \@firstofone{\endgroup\def_{\protect\UnderOrSub0}}
%    \end{verbatim}
%    but again this broke file names.
% 
%    And finally redefine the |\_| command.
%    \begin{macrocode}
\DeclareRobustCommand{\_}{%
  \ifmmode\nfss@text{\textunderscore}\else\BreakableUnderscore\fi}
%    \end{macrocode}
%
% \begin{macro}{\BreakableBackslash}
% \begin{macro}{\BreakableSlash}
% \begin{macro}{\BreakablePeriod}
% \begin{macro}{\BreakableColon}
%    We do similar breakable definitions for |\|, |/| and |.| characters.
%    \begin{macrocode}
\newcommand{\BreakableBackslash}{\leavevmode%
  \prw@zbreak\textbackslash\discretionary{-}{}{}\prw@zbreak}
\newcommand{\BreakableSlash}{\leavevmode%
  \prw@zbreak/\discretionary{-}{}{}\prw@zbreak}
\newcommand{\BreakablePeriod}{\leavevmode%
  \prw@zbreak.\discretionary{-}{}{}\prw@zbreak}
\newcommand{\BreakableColon}{\leavevmode%
  \prw@zbreak:\discretionary{-}{}{}\prw@zbreak}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\bshyp}
% \begin{macro}{\fshyp}
% \begin{macro}{\dothyp}
% \begin{macro}{\colonhyp}
%    Now for the user commands. I was hoping to have these of the form
%    |\\|, |\/| and |\.|, but these are all part of the basic set of
%    commands. |\?| appears to be the only unused single
%    analphabetic command, and I chose this for a breakable period
%    (at least the symbol does include a dot). Normal alphabetic
%    commands are used for the others. For the second release, I changed
%    my mind and replaced the original |\?| command with |\dothyp|
%    instead:
% \begin{itemize}
% \item |\dothyp| is more consistent with the other breakable commands;
% \item |\?| might be used in other classes or packages;
% \item I, or someone else, might want to later use |\?| for a breakable 
%       question mark.
% \end{itemize}
%
%    To print |first\second/third.fourth:fifth|, allowing hyphenation within
%    each `word' and also at the |\|, |/|, |.| and |:| characters,
%    the source should be: \\
%    |first\bshyp{}second\fshyp{}third\dothyp{}fourth\colonhyp{}fifth|
%
% \changes{v2}{1997/11/30}{Added \cs{dothyp} command as synonym for \cs{?} command}
% \changes{v2}{1997/11/30}{Deprecated the \cs{?} command}
% \changes{v2.1}{1998/10/14}{Removed the \cs{?} command}
%    \begin{macrocode}
\DeclareRobustCommand{\bshyp}{%
  \ifmmode\backslash\else\BreakableBackslash\fi}
\DeclareRobustCommand{\fshyp}{%
  \ifmmode/\else\BreakableSlash\fi}
\DeclareRobustCommand{\dothyp}{%
  \ifmmode.\else\BreakablePeriod\fi}
\DeclareRobustCommand{\colonhyp}{%
  \ifmmode:\else\BreakableColon\fi}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\BreakableHyphen}
% \begin{macro}{\hyp}
%  Gabriel Zachmann (\texttt{zach@igd.fhg.de}) discovered on 2000/12/21 that
% my original code for this which included |\discretionary{-}{}{}| in some
% circumstances and with some non-CMR fonts produced a double hyphen. The
% revised code has not broken (yet).
% \changes{v2.3a}{2001/01/02}{Fixed double hyphen problem}
%    \begin{macrocode}
\newcommand{\BreakableHyphen}{\leavevmode%
  \prw@zbreak-\discretionary{}{}{}\prw@zbreak}
\DeclareRobustCommand{\hyp}{%
  \ifmmode-\else\BreakableHyphen\fi}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \subsection{Hyphenation of TT text} \label{sec:tt}
%
% The default specification for the Computer Modern Typewriter font disables
% hyphenation by setting the |\hyphenchar| for the font to be -1 (in other
% fonts the |\hyphenchar| is normally 45). To enable hyphenation for
% text typeset with the cmtt font(s) we need to set the |\hyphenchar|
% to the position of the hyphen in the font. This can be done by:
% \begin{enumerate}
% \item Replacing the default \file{...tt.fd} file;
% \item Define a new virtual font with the |\hyphenchar| set;
% \item Define a new font family based on cmtt with the |\hyphenchar| set.
% \end{enumerate}
% The first choice is not good because it is effectively a global change
% to a \LaTeX{} installation. The second involves some amount of work
% (both on the package writer's and users' parts)
% and depends on the DVI driver being able to handle virtual fonts.
% The third option was initially chosen as being the simplest and most portable.
% It principally involved defining \file{.fd} files for a font family
% that I called cmhtt, as being a hyphenatable version of cmtt.
%
% \begin{macro}{\textnhtt}
% \begin{macro}{\nhttfamily}
% |\textnhtt| is equivalent to |\texttt| but it ensures that its argument
% will never be hyphenated. Similarly the |\nhttfamily| declaration is 
% the corresponding equivalent to the |\ttfamily| declaration.
% On the assumption that this will only be used for short pieces of
% text we will implement this by using a non-existant language; this does
% mean, however, that any language-specific typesetting (for example
% via the \Lpack{babel} package) will be locally disabled.
%    \begin{macrocode}
\DeclareTextFontCommand{\textnhtt}{\nhttfamily}
\DeclareRobustCommand{\nhttfamily}
  {\not@math@alphabet\nhttfamily\mathtt
   \fontfamily\ttdefault\selectfont\language\langwohyphens}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\nohyphens}
% While we are at it, we might as well define a general command to disable
% hyphenation of its argument text.
%    \begin{macrocode}
\newcommand{\nohyphens}[1]{{\language\langwohyphens #1}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\touchttfonts}
% There is a fourth way of specifying hyphenatable TT fonts that does not
% depend on generating any extra \file{.fd} files but does depend on the fact
% that \TeX{} only touches (loads) a font once. The method is to select
% all likely TT fonts at the beginning of the document, and then to select
% the normal font. When each TT font is selected its |\hyphenchar| is
% set to the default hyphen character for the font rather than to the -1
% as specified in the \file{.fd} files.
% The command |\touchttfonts| selects all likely TT fonts once. (This has
% been tested with no font packages (i.e., vanilla \LaTeX{} cmtt fonts), 
% with the PSNFSS 
% font packages, and with the \Lpack{pandora} package using the Pandora pntt
% TT font).
%
%    \begin{macrocode}
\newcommand{\touchttfonts}{%
%    \end{macrocode}
% The Medium series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% The Bold series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{b}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{b}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{b}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{b}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% The Bold Extended series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{bx}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{bx}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{bx}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{bx}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% The Semi-bold series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{sb}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{sb}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{sb}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{sb}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% The Condensed series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{c}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{c}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{c}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{c}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% The Light series in Normal, Italic, Slanted and Small Caps.
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{l}\fontshape{n}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{l}\fontshape{it}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{l}\fontshape{sl}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{l}\fontshape{sc}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% Miscellaneous cmtt not covered above (from \file{cmfonts.fdd}).
%    \begin{macrocode}
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{ui}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{bx}\fontshape{ui}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
  \fontfamily{\ttdefault}\fontseries{m}\fontshape{In}\selectfont%
    \hyphenchar\font=\defaulthyphenchar
%    \end{macrocode}
% End of the definition of |\touchttfonts|.
%    \begin{macrocode}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\touchextrattfonts}
% This macro is provided as a hook in case |\touchttfonts| does not cover
% the required range. It should be redefined in the preamble after loading
% the \Lpack{hyphenat} package. The definition of |\touchttfonts| can be
% used as a template for the new definition.
%    \begin{macrocode}
\newcommand{\touchextrattfonts}{}
%    \end{macrocode}
% \end{macro}
%
%    This completes the package.
%    \begin{macrocode}
%</usc>
%    \end{macrocode}
%
% Just in case anyone is interested, the following is my original
% specification of a hyphenatable TT font family.
%
% Now to specify the various \file{.fd} files for the cmhtt font.
% These are essentially copies of the files generateable from
% \file{cmfonts.fdd} (1998/03/27), which is part of the \LaTeX{} base
% distribution.
%
%    \begin{macrocode}
%<*ot1>
%    \end{macrocode}
% The OT1 coding for normal typesetting.
%    \begin{macrocode}
\ProvidesFile{ot1cmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts]
\DeclareFontFamily{OT1}{cmhtt}{\hyphenchar\font45}
\DeclareFontShape{OT1}{cmhtt}{m}{n}
  {%
   <5><6><7><8>cmtt8<9>cmtt9%
   <10><10.95>cmtt10%
   <12><14.4><17.28><20.74><24.88>cmtt12%
  }{}
\DeclareFontShape{OT1}{cmhtt}{m}{it}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmitt10%
  }{}
\DeclareFontShape{OT1}{cmhtt}{m}{sl}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmsltt10%
  }{}
\DeclareFontShape{OT1}{cmhtt}{m}{sc}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmtcsc10%
  }{}
\DeclareFontShape{OT1}{cmhtt}{m}{ui}
  {<->ssub*cmhtt/m/it}{}
\DeclareFontShape{OT1}{cmhtt}{bx}{n}
  {<->ssub*cmhtt/m/n}{}
\DeclareFontShape{OT1}{cmhtt}{bx}{it}
  {<->ssub*cmhtt/m/it}{}
\DeclareFontShape{OT1}{cmhtt}{bx}{ui}
  {<->ssub*cmhtt/m/it}{}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</ot1>
%    \end{macrocode}
%
%    \begin{macrocode}
%<*ot1slides>
%    \end{macrocode}
% The OT1 coding for \Lpack{slides} class.
%    \begin{macrocode}
\ProvidesFile{ot1lcmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts for slides]
\DeclareFontFamily{OT1}{lcmhtt}{\hyphenchar\font45}
\DeclareFontShape{OT1}{lcmhtt}{m}{n}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   cmtt8%
  }{}
\DeclareFontShape{OT1}{lcmhtt}{m}{In}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   icmtt8%
  }{}
\DeclareFontShape{OT1}{lcmhtt}{m}{it}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   cmitt10%
  }{}
\DeclareFontShape{OT1}{lcmhtt}{m}{ui}
  {<->ssub*lcmhtt/m/it}{}
\DeclareFontShape{OT1}{lcmhtt}{bx}{ui}
  {<->ssub*lcmhtt/m/it}{}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</ot1slides>
%    \end{macrocode}
%
%    \begin{macrocode}
%<*u>
%    \end{macrocode}
% The U coding for normal typesetting.
%    \begin{macrocode}
\ProvidesFile{ucmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts]
\DeclareFontFamily{U}{cmhtt}{\hyphenchar\font45}
\DeclareFontShape{U}{cmhtt}{m}{n}
  {%
   <5><6><7><8>cmtt8<9>cmtt9%
   <10><10.95>cmtt10%
   <12><14.4><17.28><20.74><24.88>cmtt12%
  }{}
\DeclareFontShape{U}{cmhtt}{m}{it}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmitt10%
  }{}
\DeclareFontShape{U}{cmhtt}{m}{sl}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmsltt10%
  }{}
\DeclareFontShape{U}{cmhtt}{m}{sc}
  {%
   <5><6><7><8><9>%
   <10><10.95><12><14.4><17.28><20.74><24.88>cmtcsc10%
  }{}
\DeclareFontShape{U}{cmhtt}{m}{ui}
  {<->ssub*cmhtt/m/it}{}
\DeclareFontShape{U}{cmhtt}{bx}{n}
  {<->ssub*cmhtt/m/n}{}
\DeclareFontShape{U}{cmhtt}{bx}{it}
  {<->ssub*cmhtt/m/it}{}
\DeclareFontShape{U}{cmhtt}{bx}{ui}
  {<->ssub*cmhtt/m/it}{}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</u>
%    \end{macrocode}
%
%    \begin{macrocode}
%<*t1>
%    \end{macrocode}
% The T1 coding for normal typesetting.
%    \begin{macrocode}
\ProvidesFile{t1cmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts]
\providecommand{\EC@httfamily}[5]{%
  \DeclareFontShape{#1}{#2}{#3}{#4}%
  {<5><6><7><8>#50800%
   <9><10><10.95><12><14.4><17.28><20.74><24.88><29.86>%
   <35.83>genb*#5}{}}
\DeclareFontFamily{T1}{cmhtt}{\hyphenchar\font45}
\EC@httfamily{T1}{cmhtt}{m}{n}{ectt}
\EC@httfamily{T1}{cmhtt}{m}{sl}{ecst}
\EC@httfamily{T1}{cmhtt}{m}{it}{ecit}
\EC@httfamily{T1}{cmhtt}{m}{sc}{ectc}
\DeclareFontShape{T1}{cmhtt}{bx}{n}%
  {<->ssub*cmhtt/m/n}{}
\DeclareFontShape{T1}{cmhtt}{bx}{it}%
  {<->ssub*cmhtt/m/it}{}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</t1>
%    \end{macrocode}
%
%    \begin{macrocode}
%<*t1slides>
%    \end{macrocode}
% The T1 coding for \Lpack{slides} class typesetting.
%    \begin{macrocode}
\ProvidesFile{t1lcmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts for slides]
\DeclareFontFamily{T1}{lcmhtt}{\hyphenchar\font45}
\DeclareFontShape{T1}{lcmhtt}{m}{n}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   ecltt8%
  }{}
\DeclareFontShape{T1}{lcmhtt}{m}{In}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   iecltt8%
  }{}
\DeclareFontShape{T1}{lcmhtt}{m}{it}
  {%
   <13.82><16.59><19.907><23.89><28.66><34.4><41.28>%
   ecit1000%
  }{}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</t1slides>
%    \end{macrocode}
%
%    \begin{macrocode}
%<*ts1>
%    \end{macrocode}
% The TS1 coding for normal typesetting.
%    \begin{macrocode}
\ProvidesFile{ts1cmhtt.fd}[1998/12/31 Hyphenatable cmtt fonts]
\providecommand{\EC@httfamily}[5]{%
  \DeclareFontShape{#1}{#2}{#3}{#4}%
  {<5><6><7><8>#50800%
   <9><10><10.95><12><14.4><17.28><20.74><24.88><29.86>%
   <35.83>genb*#5}{}}
\DeclareFontFamily{TS1}{cmhtt}{\hyphenchar\font45}
\EC@httfamily{TS1}{cmhtt}{m}{n}{tctt}
\EC@httfamily{TS1}{cmhtt}{m}{sl}{tcst}
\EC@httfamily{TS1}{cmhtt}{m}{it}{tcit}
%    \end{macrocode}
% That's all for this file.
%    \begin{macrocode}
%</ts1>
%    \end{macrocode}
%
%
%
%
%
% \subsection{Package features and caveats}
%
% \begin{description}
% \item[Features] :
%   \begin{itemize}
%    \item The \Lopt{none} option disables all hyphenation. If
%          you use this option you should also consider using
%          |\sloppy| (to reduce \TeX 's moans about bad line breaks)
%          or |\raggedright| (to reduce moans about overfull boxes).
%    \item |\_| prints an underscore (per the traditional command).
%    \item |_| makes a subscript in math mode, and an error in text mode.
%    \item Words surrounding |\_| are hyphenated normally
%    and there is a discretionary hyphenation point immediately after
%    the underscore.
%    \item An underscore character is used if the font
%       encoding has one, otherwise it uses a drawn underscore.
%   \end{itemize}
%
%  \item[Caveats] :
%    \begin{itemize}
%    \item Using |\_\-| together disables hyphenation in any succeeding
%          word.
%    \item Using |\nohyphens| disables any language-specific commands
%          within its argument. The same applies to |\textnhtt|
%          and |\nhttfamily|.
%    \item If the \Lopt{htt} option is used, then any resetting of
%          the default TT font must be done in the preamble before
%          the |\begin{document}|.
%   \end{itemize}
%
% \end{description}
%
%
% \bibliographystyle{alpha}
%
% \begin{thebibliography}{GMS94}
%
% \bibitem[GMS94]{GOOSSENS94}
% Michel Goossens, Frank Mittelbach, and Alexander Samarin.
% \newblock {\em The LaTeX Companion}.
% \newblock Addison-Wesley Publishing Company, 1994.
%
% \bibitem[Wil96]{PRW96i}
% Peter~R. Wilson.
% \newblock {\em {LaTeX for standards: The LaTeX package files user manual}}.
% \newblock NIST Report NISTIR, June 1996.
%
% \end{thebibliography}
%
%
% \Finale
% \PrintIndex
%
\endinput

%% \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         \~}


