path: root/Master/texmf-dist/source/latex/fontspec/fontspec.dtx

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\preamble

  _________________________________________
  The fontspec package for XeLaTeX/LuaLaTeX
  (C) 2004--2010    Will Robertson and Khaled Hosny

  License information appended.


\endpreamble
\postamble

Copyright 2004--2010 Will Robertson <wspr81@gmail.com>
Copyright 2009--2010 Khaled Hosny <khaledhosny@eglug.org>

Distributable under the LaTeX Project Public License,
version 1.3c or higher (your choice). The latest version of
this license is at: http://www.latex-project.org/lppl.txt

This work is "author-maintained" by Will Robertson.

This work consists of this file fontspec.dtx
          and the derived files fontspec.sty,
                                fontspec.lua,
                                fontspec.cfg,
                                fontspec.ins,
                                fontspec-example.ltx,
                            and fontspec.pdf.

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%<*fontspec|patches>
  [2010/05/27 v2.0b1 Advanced font selection for XeLaTeX/LuaLaTeX]
%</fontspec|patches>
%
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\documentclass[a4paper]{ltxdoc}
\usepackage{fontspec-style}
\EnableCrossrefs
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%\OnlyDescription
\begin{document}
  \DocInput{\jobname.dtx}
\end{document}
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%
% \fi
%
% \GetFileInfo{fontspec.dtx}
% \makeatletter                         ^^A% To document @-cmds
% \errorcontextlines=999                ^^A% Show up all my mistakes
%
% \title{The \textsf{fontspec} package}
% \author{\textsc{Will Robertson} and \textsc{Khaled Hosny}}
% \date{\filedate \qquad \fileversion}
%
% \maketitle
% \tableofcontents
%
% \section{History}
%
% This package began life as a \LaTeX\ interface to select system-installed
% \MacOSX\ fonts in \name{Jonathan Kew}'s \XeTeX, the first widely-used
% unicode extension to \TeX. Over time, \XeTeX\ was extended to support OpenType
% fonts and then was ported into a cross-platform program to run also on Windows
% and Linux.
%
% More recently, \LuaTeX\ is fast becoming the \TeX\ engine of the day; it
% supports unicode encodings and OpenType fonts and opens up the internals of
% \TeX\ via the Lua programming language. Hans Hagen's Con\TeX t Mk.\,IV is a
% re-write of his powerful typesetting system, taking full advantage of
% \LuaTeX's features including font support; a kernel of his work in this area
% has been extracted to be useful for other \TeX\ macro systems as well, and
% this has enabled \pkg{fontspec} to be adapted for \LaTeX\ when run with the
% \LuaTeX\ engine. Elie Roux and Khaled Hosny have been instrumental and
% invaluable with this development work.
%
% \section{Introduction}
%
% The \pkg{fontspec} package allows users of either \XeTeX\ or \LuaTeX\ to
% load OpenType fonts in a \LaTeX\ document. No font installation is necessary,
% and font features can be selected and used as desired throughout the document.
%
% Without \pkg{fontspec}, it is necessary to write cumbersome font definition
% files for \LaTeX, since \LaTeX's font selection scheme (known as the
% `\textsc{nfss}') has a lot going on behind the scenes to allow easy
% commands like \cmd\emph\ or \cmd\bfseries. With an uncountable number of
% fonts now available for use, however, it becomes less desirable to have to
% write these font definition (|.fd|) files for every font one wishes to use.
%
% Because \pkg{fontspec} is designed to work in a variety of modes, this
% user documentation is split into separate sections that are designed to be
% relatively independent. Nonetheless, the basic functionality all behaves in
% the same way, so previous users of \pkg{fontspec} under \XeTeX\ should have
% little or no difficulty switching over to \LuaTeX.
%
% This manual can get rather in-depth, as there are a lot of details
% to cover. See the example documents \path{fontspec-xetex.tex} and
% \path{fontspec-luatex.tex} for a complete minimal example with each engine.
%
% \subsection{About this manual}
%
% As of version 2.0 with the addition of \LuaTeX\ support, this manual
% is still in the process of being re-written.
% It currently contains no typeset examples.
% Your patience and feedback is appreciated!
%
% \section{Package loading and options}
%
% For basic use, no package options are required:
% \begin{Verbatim}
%   \usepackage{fontspec}
% \end{Verbatim}
%
% In brief, \pkg{fontspec}'s package options are
% \begin{description}[nolistsep,font=\ttfamily]
% \item [no-math] Don't change any maths fonts;
% \item [no-config] Don't load \pkg{fontspec.cfg}; and,
% \item [quiet] Output \pkg{fontspec} warnings in the log file rather than the console output.
% \end{description}
% These are described in more detail below.
%
% \paragraph{\XeTeX\ users only}
% \name{Ross Moore}'s \pkg{xunicode} package is recommended for
% providing backwards compatibility with \LaTeX's methods for accessing extra
% characters and accents (for example, |\%|, |\$|, |\textbullet|, |\"u|, and
% so on), plus many more unicode characters. The \pkg{xltxtra} package adds a
% couple of general improvements to \LaTeX\ under \XeTeX; it also provides the
% \cmd\XeTeX\ macro to typeset the \XeTeX\ logo.
%
% \paragraph{\LuaTeX\ users only}
% In order to load fonts by their name rather than by their filename (\eg, `Latin Modern Roman' instead of `ec-lmr10'), you may need to run the script \texttt{mkluatexfontdb.lua}, which is distributed with the \pkg{luaotfload} package. Please see its documentation for more information.
% Note that the \pkg{xunicode} package is not required as it has been
% incorporated directly into the unicode font definitions (see the \pkg{euenc} package for more information).
%
% \paragraph{\pkg{babel}}
% \emph{The \pkg{babel} package is not really supported!} Especially Vietnamese,
% Greek, and Hebrew at least might not work correctly, as far as I can tell.
% There's a better chance with Cyrillic and Latin-based languages,
% however---\pkg{fontspec} ensures at least that fonts should load correctly,
% but hyphenation and other matters aren't guaranteed. Under \XeTeX, the
% \pkg{polyglossia} package is recommended instead as a modern replacement for
% \pkg{babel}.
%
%
%
% \subsection{Maths fonts adjustments}
% By default, \pkg{fontspec} adjusts \LaTeX's
% default maths setup in order to maintain the correct Computer Modern symbols
% when the roman font changes. However, it will attempt to avoid doing this if
% another maths font package is loaded (such as \pkg{mathpazo} or my upcoming
% \pkg{unicode-math} package).
%
% If you find that it is incorrectly changing the maths font when it should be
% leaving well enough alone, apply the |[no-math]| package option to manually
% suppress its maths font.
%
% \subsection{Configuration} If you wish to customise any part of the
% \pkg{fontspec} interface (see later in this manual, \vref{sec:newfeatures}
% and~\ref{sec:aliasfontfeature}), this should be done by creating your own
% \texttt{fontspec.cfg} file, \note{An example is distributed with the package.}
% which will be automatically loaded if it is found by \XeTeX. Either place it
% in the same folder as the main document for isolated cases, or in a location
% that \XeTeX\ or \LuaTeX\ searches by default; \eg\ in Mac\TeX: \path{~/Library/texmf/tex/latex/}.
% The package option |[no-config]| will suppress this behaviour under all circumstances.
%
% \subsection{Warnings}
% \label{sec:quiet-warnings}
%
% This package can give many warnings that can be harmless if you know what
% you're doing. Use the |[quiet]| package option to write these warnings to the
% transcript (\texttt{.log}) file instead.
%
% Use the |[silent]| package option to completely suppress these warnings if you
% don't even want the |.log| file cluttered up.
%
%
%
%
%
% \clearpage
% \part{General font selection}
%
% This section concerns the variety of commands that can be used to select
% fonts.
%
% \cmdbox{%
%   \CMD{~~~~~\string\fontspec} \oarg{font features} \marg{font name}\\
%   \CMD{~~\string\setmainfont} \oarg{font features} \marg{font name}\\
%   \CMD{~~\string\setsansfont} \oarg{font features} \marg{font name}\\
%   \CMD{~~\string\setmonofont} \oarg{font features} \marg{font name}\\
%   \CMD{\string\newfontfamily} \meta{cmd} \oarg{font features} \marg{font name}
% }
%
% These are the main font-selecting commands of this package.
% The \cs{fontspec} command selects a font for one-time use; all
% others should be used to define the standard fonts used in a document.
% They will be described later in this section.
%
% The font features argument accepts comma separated
% \meta{font feature}=\meta{option} lists; these are described in later:
% \begin{itemize}
% \item For general font features, see \vref{sec:font-ind-features}
% \item For OpenType fonts, see Part~\vref{sec:opentype-features}
% \item For \XeTeX-only general font features, see Part~\vref{sec:xetex-features}
% \item For features for \AAT\ fonts in \XeTeX, see Part~\vref{sec:aat-features}
% \end{itemize}
%
% \section{Font selection}
%
% In both \LuaTeX\ and \XeTeX, fonts can be selected either by `font name' or
% by `file name'.
%
% \subsection{By font name}
%
% Fonts known to \LuaTeX\ or \XeTeX\ may be loaded by their names.
% `Known to' in this case generally means `exists in a standard fonts location'
% such as |~/Library/Fonts| on \MacOSX, or |C://WINNT/Fonts| on Windows.
%
% The simplest example might be something like
% \begin{Verbatim}
%   \fontspec[ ... ]{Cambria}
% \end{Verbatim}
% in which the bold and italic fonts will be found automatically
% (if they exist) and are immediately accessible with the usual
% \cs{textit} and \cs{textbf} commands.
%
% TODO: add explanation for how to find out what the `font name' is.
%
%
% \subsection{By file name}
%
% When selecting fonts by file name, any font that can be found in the default
% search paths may be used directly (including in the current directory)
% without having to explicitly define the location of the font file on disk.
%
% Note that \XeTeX\ with the |xdvipdfmx| driver and \LuaTeX\ can both select
% fonts in this way, but \XeTeX\ with the |xdv2pdf| driver can only select fonts
% by name and not by file name. The |xdvipdfmx| driver is default for \XeTeX;
% the |xdv2pdf| driver is only available on \MacOSX.
%
% Fonts selected by filename must include bold and italic variants explicitly.
% \begin{Verbatim}
%   \fontspec
%      [ BoldFont       = texgyrepagella-bold.otf ,
%        ItalicFont     = texgyrepagella-italic.otf ,
%        BoldItalicFont = texgyrepagella-bolditalic.otf ]
%      {texgyrepagella-regular.otf}
% \end{Verbatim}
% \pkg{fontspec} knows that the font is to be selected by file name by the
% presence of the `|.otf|' extension.
% An alternative is to specify the extension separately, as shown following:
% \begin{Verbatim}
%   \fontspec
%      [ Extension      = .otf ,
%        BoldFont       = texgyrepagella-bold ,
%        ... ]
%      {texgyrepagella-regular}
% \end{Verbatim}
% If desired, an abbreviation can be applied to the font names based on the
% mandatory `font name' argument:
% \begin{Verbatim}
%   \fontspec
%      [ Extension      = .otf ,
%        UprightFont    = *-regular ,
%        BoldFont       = *-bold ,
%        ... ]
%      {texgyrepagella}
% \end{Verbatim}
% In this case `texgyrepagella' is no longer the name of an actual font,
% but is used to construct the font names for each shape;
% the |*| is replaced by `texgyrepagella'.
% Note in this case that |UprightFont| is required for constructing the font
% name of the normal font to use.
%
% To load a font that is not in one of the default search paths, its location
% in the filesystem must be specified with the |Path| feature:
% \begin{Verbatim}
%   \fontspec
%      [ Path           = /Users/will/Fonts/ ,
%        UprightFont    = *-regular ,
%        BoldFont       = *-bold ,
%        ... ]
%      {texgyrepagella}
% \end{Verbatim}
% Note that \XeTeX\ and \LuaTeX\ are able to load the font without giving an
% extension, but \pkg{fontspec} must know to search for the file; this can can
% be indicated by declaring the font exists in an `|ExternalLocation|':
% \begin{Verbatim}
%   \fontspec
%      [ ExternalLocation ,
%        BoldFont       = texgyrepagella-bold ,
%        ... ]
%      {texgyrepagella-regular}
% \end{Verbatim}
% To be honest, |Path| and |ExternalLocation| are actually the same feature
% with different names. The former can be given without an argument and the
% latter can be given with one; the different names are just for clarity.
%
%
% \section{Default font families}
% \label{sec:setxxfont}
%
% \cmdbox{
%   \cmd{\setmainfont} \oarg{font features} \marg{font name} \\
%   \cmd{\setsansfont} \oarg{font features} \marg{font name} \\
%   \cmd{\setmonofont} \oarg{font features} \marg{font name}
% }
%
% These commands are used to select
% the default font families for the entire document. They take the
% same arguments as \cmd{\fontspec}. For example:
%   \def\pangram{Pack my box with five
%                      dozen liquor jugs.}
% \begin{example}
%   \setmainfont{Baskerville}
%   \setsansfont[Scale=MatchLowercase]{Skia}
%   \setmonofont[Scale=MatchLowercase]{Monaco}
%   \rmfamily\pangram\par
%   \sffamily\pangram\par
%   \ttfamily\pangram
% \end{example}
% Here, the scales of the fonts have been chosen to equalise their
% lowercase letter heights. The \feat{Scale} font feature will be discussed
% further in \vref{sec:font-ind-features}, including methods for automatic
% scaling.
%
%
%
% \section{New commands to select font families}
%
% \cmdbox{
%   \CMD{\string\newfontfamily} \cs{\meta{font-switch}} \oarg{font features} \marg{font name} \\
%   \CMD{~~\string\newfontface} \cs{\meta{font-switch}} \oarg{font features} \marg{font name}
% }
%
% \noindent For cases when a specific font with a specific
% feature set is going to be re-used many times in a document, it is inefficient
% to keep calling \cs{fontspec} for every use. While the command does not define
% a new font instance after the first call, the feature options must still be
% parsed and processed.
%
% \DescribeMacro{\newfontfamily}
% For this reason, new commands can be created for loading a particular font
% family with the \cmd\newfontfamily\ command:
% \begin{example}
%   \newfontfamily\notefont{Didot}
%   \notefont This is a \emph{note}.
% \end{example}
% This macro should be used to create commands that would be used in
% the same way as \cmd\rmfamily, for example.
%
% \DescribeMacro{\newfontface}
% Sometimes only a specific font face is desired, without accompanying italic or bold variants
% begin automatically selected.
% This is common when selecting a fancy italic font, say, that has swash features unavailable
% in the upright forms. \cmd\newfontface\ is used for this purpose:
% \begin{example}
%   \newfontface\fancy
%       [Contextuals={WordInitial,WordFinal}]
%                        {Hoefler Text Italic}
%   \fancy where is all the vegemite
% \end{example}
% \noindent This example is repeated in \vref{sec:contextuals}.
%
% \subsection{More control over font shape selection}
% \label{sec:bfitfonts}
%
% \cmdbox{
%  \feat{~~~~~~~BoldFont} = \meta{font name} \\
%  \feat{~~~~~ItalicFont} = \meta{font name} \\
%  \feat{~BoldItalicFont} = \meta{font name} \\
%  \feat{~~~~SlantedFont} = \meta{font name} \\
%  \feat{BoldSlantedFont} = \meta{font name} \\
%  \feat{~~SmallCapsFont} = \meta{font name}
% }
%
% The automatic bold, italic, and bold italic font selections will not be
% adequate for the needs of every font: while some fonts mayn't even
% have bold or italic shapes, in which case a skilled (or lucky)
% designer may be able to chose well-matching accompanying shapes from
% a different font altogether, others can have a range of bold and
% italic fonts to chose between.  The \feat{BoldFont} and
% \feat{ItalicFont} features are provided for these situations. If only
% one of these is used, the bold italic font is requested as the
% default from the \emph{new} font.
% \begin{example}
%   \fontspec[BoldFont={Helvetica Neue}]
%                           {Helvetica Neue UltraLight}
%                 Helvetica Neue UltraLight         \\
%   {\itshape     Helvetica Neue UltraLight Italic} \\
%   {\bfseries               Helvetica Neue       } \\
%   {\bfseries\itshape       Helvetica Neue Italic} \\
% \end{example}
% If a bold italic shape is not defined, or you want to specify
% \emph{both} custom bold and italic shapes, the \feat{BoldItalicFont}
% feature is provided.
%
% \subsubsection{Input shorthands}
%
% For those cases that the base font name is repeated, you can
% replace it with an asterisk. For example,
% some space can be saved instead of writing `\texttt{Baskerville SemiBold}':
% \begin{example}
%   \fontspec[BoldFont={* SemiBold}]{Baskerville}
%          Baskerville \textit{Italic}
%   \bfseries SemiBold \textit{Italic}
% \end{example}
%
% As a matter of fact, this feature can also be used for the upright font too:
% \begin{example}
%   \fontspec[UprightFont={* SemiBold},
%             BoldFont={* Bold}]{Baskerville}
%          Upright \textit{Italic}
%   \bfseries Bold \textit{Bold Italic}
% \end{example}
%
% \subsubsection{Small caps and slanted font shapes}
%
% For the rare situations where a font family will have slanted \emph{and}
% italic shapes, these may be specified separately using the analogous
% features \feat{SlantedFont} and \feat{BoldSlantedFont}. Without these,
% however, the \LaTeX\ font switches for slanted (\cs{textsl}, \cs{slshape})
% will default to the italic shape.
%
% Old-fashioned font families used to distribute their small caps
% glyphs in separate fonts due to the limitations on the number
% of glyphs allowed in the PostScript Type~1 format. Such fonts may be used
% by declaring the \feat{SmallCapsFont} of the family you are specifying:
% \begin{Verbatim}
%   \fontspec[
%     SmallCapsFont={Minion MM Small Caps & Oldstyle Figures},
%            ]{Minion MM Roman}
%   Roman 123 \\ \textsc{Small caps 456}
% \end{Verbatim}
%
% All of the bold, italic, and small caps fonts can be loaded with different
% font features from the main font. See \ref{bfit-feat} for details.
%
% \subsection{Math(s) fonts}
%
% When \cmd\setmainfont, \cmd\setsansfont\ and \cmd\setmonofont\ are used in the
% preamble, they also define the fonts to be used in maths mode inside the
% \cmd\mathrm-type commands. This only occurs in the preamble because \LaTeX\
% freezes the maths fonts after this stage of the processing. The \pkg{fontspec}
% package must also be loaded after any maths font packages (\eg, \pkg{euler})
% to be successful. (Actually, it is \emph{only} \pkg{euler} that is the
% problem.\footnote{Speaking of \pkg{euler}, if you want to use its
% \texttt{[mathbf]} option, it won't work, and you'll need to put this after
% \pkg{fontspec} is loaded instead:
% \ttfamily\cmd\AtBeginDocument\char`\{\cmd\DeclareMathAlphabet\cmd\mathbf\char`\{U\char`\}\char`\{eur\char`\}\char`\{b\char`\}\char`\{n\char`\}})
%
% Note that you may find that loading some maths packages won't be as smooth as
% you expect since \pkg{fontspec} (and \XeTeX\ in general) breaks many of the
% assumptions of \TeX\ as to where maths characters and accents can be found.
% Contact me if you have troubles, but I can't guarantee to be able to fix any
% incompatibilities. The Lucida and Euler maths fonts should be fine; for all
% others keep an eye out for problems.
%
% \cmdbox{
%   \cmd{\setmathrmfont} \oarg{font features} \marg{font name} \\
%   \cmd{\setmathsffont} \oarg{font features} \marg{font name} \\
%   \cmd{\setmathttfont} \oarg{font features} \marg{font name} \\
%   \cmd{\setboldmathrmfont} \oarg{font features} \marg{font name}
% }
%
% However, the default text fonts may not necessarily be the ones you
% wish to use when typesetting maths (especially with the use of fancy
% ligatures and so on). For this reason, you may optionally use those
% commands listed in the margin (in the same way as our other
% \cmd\fontspec-like commands) to explicitly state which fonts to use
% inside such commands as \cmd\mathrm. Additionally, the
% \cmd\setboldmathrm\ command allows you define the font used for
% \cmd\mathrm\ when in bold maths mode (which is activated with, among
% others, \cmd\boldmath).
%
% For example, if you were using Optima with the Euler maths font, you
% might have this in your preamble:
% \begin{Verbatim}
%   \usepackage{mathpazo}
%   \usepackage{fontspec,xunicode}
%   \setmainfont{Optima}
%   \setmathrm{Optima}
%   \setboldmathrm[BoldFont=Optima ExtraBlack]{Optima Bold}
% \end{Verbatim}
% and this would allow you to typeset something like this:
% \begin{example}
%   \setmainfont{Optima Regular}
%   $ X \rightarrow \mathrm{X} \rightarrow \mathbf{X} $
%   \\\boldmath
%   $ X \rightarrow \mathrm{X} \rightarrow \mathbf{X} $
% \end{example}
% (TODO: this example obviously doesn't work without the graphic.)
%
%
% \subsection{Miscellaneous font selecting details}
%
% \paragraph{Spaces}
% \cmd\fontspec\ and \cmd\addfontfeatures\ ignore trailing spaces as
% if it were a `naked' control sequence; \eg, `|M. \fontspec{...} N|' and
% `|M. \fontspec{...}N|' are the same.
%
% \paragraph{Italic small caps}
% Note that this package redefines the \cs{itshape} and \cs{scshape}
% commands in order to allow them to select italic small caps in
% conjunction.
%
% \paragraph{Emphasis and nested emphasis}
% You may specify the behaviour of the \cs{emph} command by setting the
% \cs{emshape} command. \Eg, for bold emphasis:\par
% \indent|\renewcommand\emshape{\bfseries}|\par\noindent
% Nested emphasis is controlled by the \cs{eminnershape} command.
% For example, for |\emph{\emph{...}}| to produce small caps:\par
% \indent|\renewcommand\eminnershape{\scshape}|\par\noindent
% \XeTeX\ users will need to load the \pkg{xltxtra} package before the
% advice above works.
%
%
%
%
%
% \section{Selecting font features}
% \label{sec:selectingfeature}
%
% The commands discussed so far each take an optional argument for
% accessing the font features of the requested font. These features
% are generally unavailable or harder to access in regular \LaTeX.
%
% \subsection{Default settings} \label{sec:defaults}
%
% \cmdbox{\cmd\defaultfontfeatures \marg{font features}}
%
% It is desirable to define
% options that are applied to every subsequent font selection command:
% a default feature set, so to speak. This may be defined with the
% \cmd{\defaultfontfeatures} command.
% New calls of \cs{defaultfontfeatures} overwrite previous ones.
% \begin{example}
%   \fontspec{Didot}
%    Some `default' Didot 0123456789             \\
%   \defaultfontfeatures{Numbers=OldStyle, Color=888888}
%   \fontspec{Didot}
%    Now grey, with old-style figures: 0123456789
% \end{example}
%
% \subsection{Changing the currently selected features}
% \label{sec:addfontfeatures}
%
% \cmdbox{\cmd\addfontfeatures \marg{font features}}
%
% This command allows font features to
% be changed without knowing what features are currently selected or even what
% font is being used. A good example of this could be to add a hook to all
% tabular material to use monospaced numbers, as shown in the following example:
%
% \begin{example}
%   \fontspec[Numbers=OldStyle]{Skia}
%   `In 1842, 999 people sailed 97 miles in
%    13 boats. In 1923, 111 people sailed 54
%    miles in 56 boats.'            \bigskip
%
%   {\addfontfeatures{Numbers={Monospaced,Lining}}
%   \begin{tabular}{@{} cccc @{}}
%     \toprule  Year & People & Miles & Boats \\
%     \midrule  1842 &  999   &  75   &  13   \\
%               1923 &  111   &  54   &  56   \\
%     \bottomrule
%   \end{tabular}}
% \end{example}
%
% \DescribeMacro{\addfontfeature}
% This command may also be executed under the alias \cmd{\addfontfeature}.
%
% \subsection{Priority of feature selection}
% Features defined with \cs{addfontfeatures} override features
% specified by \cs{fontspec}, which in turn override features
% specified by \cs{defaultfontfeatures}.  If in doubt, whenever a
% new font is chosen for the first time, an entry is made in the
% transcript (\texttt{.log}) file displaying the font name and the
% features requested.
%
% \subsection{Different features for different font shapes}
% \label{sec:bfit-feat}
%
% \cmdbox{
%  \feat{~~~~~~~BoldFeatures}\marg{features} \\
%  \feat{~~~~~ItalicFeatures}\marg{features} \\
%  \feat{~BoldItalicFeatures}\marg{features} \\
%  \feat{~~~~SlantedFeatures}\marg{features} \\
%  \feat{BoldSlantedFeatures}\marg{features} \\
%  \feat{~~SmallCapsFeatures}\marg{features}
% }
%
% It is entirely possible that separate fonts in a family will require
% separate options; \eg, Hoefler Text Italic contains various swash
% feature options that are completely unavailable in the upright shapes.
%
% The font features defined at the top level of the optional \cmd\fontspec\
% argument are applied to \emph{all} shapes of the family.
% Using \feat{Upright-}, \feat{SmallCaps-}, \feat{Bold-},
% \feat{Italic-}, and \feat{BoldItalicFeatures},
% separate font features may be defined to their respective shapes
% \emph{in addition} to, and with precedence over, the `global' font features.
% \begin{aatexample}
%   \fontspec{Hoefler Text} \itshape \scshape
%   Attention All Martini Drinkers \\
%   \addfontfeature{ItalicFeatures={Alternate = 1}}
%   Attention All Martini Drinkers \\
% \end{aatexample}
% Combined with the options for selecting arbitrary \emph{fonts} for
% the different shapes, these separate feature options allow the
% selection of arbitrary weights in the Skia typeface, for example:
% \begin{aatexample}
%   \fontspec[BoldFont={Skia},
%    BoldFeatures={Weight=2}]{Skia}
%   Skia \\ \bfseries Skia `Bold'
% \end{aatexample}
%
% Note that because most fonts include their small caps glyphs
% within the main font, features specified with \feat{SmallCapsFeatures} are applied \emph{in addition} to
% any other shape-specific features as defined above, and hence \feat{SmallCapsFeatures}
% can be nested within \feat{ItalicFeatures} and friends. Every combination
% of upright, italic, bold and small caps can thus be assigned individual
% features, as shown in the following ludicrous example.
% \begin{example}
%   \fontspec[
%       UprightFeatures={Color = 220022,
%            SmallCapsFeatures = {Color=115511}},
%        ItalicFeatures={Color = 2244FF,
%            SmallCapsFeatures = {Color=112299}},
%          BoldFeatures={Color = FF4422,
%            SmallCapsFeatures = {Color=992211}},
%    BoldItalicFeatures={Color = 888844,
%            SmallCapsFeatures = {Color=444422}},
%            ]{Hoefler Text}
%   Upright {\scshape Small Caps}\\
%   \itshape Italic {\scshape Italic Small Caps}\\
%   \upshape\bfseries Bold {\scshape Bold Small Caps}\\
%   \itshape Bold Italic {\scshape Bold Italic Small Caps}
% \end{example}
%
% \subsection{Different features for different font sizes}
% \label{sec:sizefeature}
%
% \cmdbox{
% \ttfamily SizeFeatures = \char`\{\\
% \null\quad...\\
% \null\quad\char`\{~Size =
% \rmfamily\meta{size range}\ttfamily
% ,
% \rmfamily \meta{font features}\ttfamily
% ~\char`\} \\
% \null\quad\char`\{~Size =
% \rmfamily\meta{size range}\ttfamily
% , Font =
% \rmfamily\meta{font name}\texttt, \meta{font features}\ttfamily
% ~\char`\} \\
% \null\quad... \\
% \char`\}}
%
% The \feat{SizeFeature} feature is a little more complicated
% than the previous features discussed. It allows different fonts
% and different font features to be selected for a given font
% family as the point size varies.
%
% It takes a comma separated list of braced, comma separated lists of features for each size range.
% Each sub-list must contain the \opt{Size} option
% to declare the size range, and optionally \opt{Font} to change the
% font based on size. Other (regular) fontspec features that are added
% are used on top of the font features that would be used anyway.
%
% \begin{example}
%   \fontspec[ SizeFeatures={
%       {Size={-8}, Font=Apple Chancery, Color=AA0000},
%       {Size={8-14}, Color=00AA00},
%       {Size={14-}, Color=0000AA}} ]{Skia}
%   {\scriptsize Small\par} Normal size\par {\Large Large\par}
% \end{example}
% A less trivial example is shown in the context of optical font sizes
% in \vref{sec:opticalsize}.
%
% To be precise, the \opt{Size} sub-feature accepts arguments in the form shown in \vref{tab:sizing}.
% Braces around the size range are optional. For an exact font size (|Size=X|)
% font sizes chosen near that size will `snap'. For example, for size definitions
% at exactly 11pt and 14pt, if a 12pt font is requested \emph{actually} the
% 11pt font will be selected. This is a remnant of the past when fonts were designed
% in metal (at obviously rigid sizes) and later when bitmap fonts were similarly
% designed for fixed sizes.
%
% If additional features are only required for a single size, the other sizes
% must still be specified.  As in:
% \begin{verbatim}
%   SizeFeatures={
%      {Size=-10,Numbers=Uppercase},
%      {Size=10-}}
% \end{verbatim}
% Otherwise, the font sizes greater than 10 won't be defined!
%
% \begin{table}
% \centering
% \begin{tabular}{@{}ll@{}}
% \toprule
% Input & Font size, $s$ \\
% \midrule
%  |Size = X-| & $s \geq \texttt{X}$ \\
%  |Size = -Y| & $s < \texttt{Y}$ \\
%  |Size = X-Y| & $\texttt{X} \leq s < \texttt{Y}$ \\
%  |Size = X| & $s = \texttt{X}$ \\
% \bottomrule
% \end{tabular}
% \caption{Syntax for specifying the size to apply custom font features.}\label{tab:sizing}
% \end{table}
%
%
% \section{Font independent options} \label{sec:font-ind-features}
%
% Features introduced in this section may be used with any font.
%
% \subsection{Color}
%
% \feat{Color} (or \feat{Colour}), also shown in \vref{sec:defaults}
% and elsewhere, uses \XeTeX\ font specifications to set the color of
% the text. The color is defined as a triplet of two-digit Hex RGB
% values, with optionally another value for the transparency (where
% |00| is completely transparent and |FF| is opaque.)
% \begin{example}
%   \fontsize{48}{48}
%   \fontspec{Hoefler Text Black}
%   {\addfontfeature{Color=FF000099}W}\kern-1ex
%   {\addfontfeature{Color=0000FF99}S}\kern-0.8ex
%   {\addfontfeature{Color=DDBB2299}P}\kern-0.8ex
%   {\addfontfeature{Color=00BB3399}R}
% \end{example}
%
% \subsection{Scale}
%
% \cmdbox{
%  \feat{Scale} = \meta{number} \\
%  \feat{Scale} = \opt{MatchLowercase} \\
%  \feat{Scale} = \opt{MatchUppercase}
% }
%
% In its explicit form, \feat{Scale} takes a single
% numeric argument for linearly scaling the font, as demonstrated
% in \vref{sec:setxxfont}.
% It is now possible to
% measure the correct dimensions of the fonts loaded and
% calculate values to scale them automatically.
%
% As well as a numerical argument, \feat{Scale} feature
% also accepts options \opt{MatchLowercase}
% and \opt{MatchUppercase}, which will scale the font being selected to match
% the current default roman font to either the height of the lowercase or
% uppercase letters, respectively.
% \begin{example}
%   \setmainfont{Georgia}
%   \newfontfamily\lc[Scale=MatchLowercase]{Verdana}
%    The perfect match {\lc is hard to find.}\\
%   \newfontfamily\uc[Scale=MatchUppercase]{Arial}
%    L O G O \uc F O N T
% \end{example}
% The amount of scaling used in each instance is reported in the \texttt{.log} file.
% Since there is some subjectivity about the exact scaling to be used, these values
% should be used to fine-tune the results.
%
%
%
%
% \subsection{Interword space}
%
% While the space between words can be varied on an individual
% basis with the \TeX\ primitive \cmd\spaceskip\ command, it is
% more convenient to specify this information when the font is
% first defined.
%
% The space in between words in a paragraph will be chosen automatically
% by \XeTeX, and generally will not need to be adjusted. For those
% times when the precise details are important, the \feat{WordSpace}
% features is
% provided, which takes either a single scaling factor to scale the
% value that \XeTeX\ has already chosen, or a triplet of comma-separated
% values for the nominal value, the stretch, and the shrink of the
% interword space, respectively. \Ie, |WordSpace=0.8| is the same as
% |WordSpace={0.8,0.8,0.8}|.
%
% For example, I believe that the Cochin font, as distributed with \MacOSX,
% is too widely spaced. Now, this can be rectified, as shown below.
% \begingroup
% \let\centering\relax
% \def\fillertext{Some filler text for our example to take up some
%   space, and to demonstrate the large default interword space in \textit{Cochin}.}
% \begin{example}
%   \fontspec{Cochin}
%   \fillertext
%   \vspace{1em}
%
%   \fontspec[ WordSpace = {0.7 , 0.8 , 0.9} ]{Cochin}
%   \fillertext
% \end{example}
% \endgroup
% Be careful with the unpredictable things that the \AAT\ font renderer
% can do with the text! Unlike \TeX, \MacOSX\ will allow
% fonts to letterspace themselves, which can be seen above; OpenType fonts, however, will not
% show this tendency, as they do not support this arguably dubious feature.
%
% \subsection{Post-punctuation space}
%
% If \cmd\frenchspacing\ is \emph{not} in effect, \TeX\ will allow extra
% space after some punctuation in its goal of justifying the lines of text.
% Generally, this is considered old-fashioned, but occasionally in small amounts the
% effect can be justified, pardon the pun.
%
% The \feat{PunctuationSpace} feature takes a scaling factor by which to
% adjust the nominal value chosen for the font. Note that |PunctuationSpace=0|
% is \emph{not} equivalent to \cmd\frenchspacing, although the difference
% will only be apparent when a line of text is under-full.
% \begingroup
% \let\centering\relax
% \begin{example}
%   \nonfrenchspacing
%   \fontspec{Baskerville}
%    Letters, Words. Sentences.          \par
%   \fontspec[PunctuationSpace=0.5]{Baskerville}
%    Letters, Words. Sentences.          \par
%   \fontspec[PunctuationSpace=0]{Baskerville}
%    Letters, Words. Sentences.
% \end{example}
% \endgroup
%
% Also be aware that the above caveat for interword space also applies here,
% so after the last line in the above example, the \feat{PunctuationSpace}
% for \emph{all} Baskerville instances will be |0|.
%
%
%
%
% \subsection{The hyphenation character}
%
% The letter used for hyphenation may be chosen with the \feat{HyphenChar}
% feature. It takes three types of input, which are chosen according to some
% simple rules. If the input is the string \opt{None}, then hyphenation is
% suppressed for this font. If the input is a single character, then this
% character is used. Finally, if the input is longer than a single character
% it must be the UTF-8 slot number of the hyphen character you desire.
%
% Below, Adobe Garamond Pro's uppercase hyphenation character
% is used to demonstrate a possible use for this feature.
% The second example redundantly demonstrates the default behaviour
% of using the hyphen as the hyphenation character.
% \begingroup
% \let\centering\relax
% \begin{example}
%   \def\text
%     {A MULTITUDE OF OBSTREPEROUSLY HYPHENATED ENTITIES
%                                        \par\vspace{1ex}}
%   \fontspec[HyphenChar=None]{Adobe Garamond Pro} \text
%   \fontspec[HyphenChar={-}]{Adobe Garamond Pro} \text
%   \fontspec[HyphenChar="F6BA]{Adobe Garamond Pro} \text
% \end{example}
% \endgroup
% Note that in an actual situation, the \opt{Uppercase} option of the \feat{Letters} feature
% would probably supply this for you (see \vref{sec:letters}).
%
% This package (or the \pkg{xltxtra} package for \XeTeX\ users)
% redefines \LaTeX's \cmd\-\ macro
% such that it adjusts along with the above changes.
%
%
% \subsection{Optical font sizes} \label{sec:opticalsize}
%
% Optically scaled fonts thicken out as the font size decreases
% in order to make the glyph shapes more robust (less prone to losing
% detail), which improves legibility. Conversely, at large optical
% sizes the serifs and other small details may be more delicately
% rendered.
%
% OpenType fonts with optical scaling will exist in
% several discrete sizes, and these will be selected by \XeTeX\
% \emph{automatically} determined by the current font size. The
% \opt{OpticalSize} option may be used to specify a different optical
% size.
%
% For the OpenType font Warnock Pro, we have three optically sized
% variants: caption, subhead, and display. With \opt{OpticalSize} set
% to zero, no optical size font substitution is performed:
% \begin{opentypeexample}
%   \fontspec[OpticalSize=0]{Warnock Pro Caption}
%    Warnock Pro optical sizes                \\
%   \fontspec[OpticalSize=0]{Warnock Pro}
%    Warnock Pro optical sizes                \\
%   \fontspec[OpticalSize=0]{Warnock Pro Subhead}
%    Warnock Pro optical sizes                \\
%   \fontspec[OpticalSize=0]{Warnock Pro Display}
%    Warnock Pro optical sizes
% \end{opentypeexample}
%
% Automatic OpenType optical scaling is shown in the following
% example, in which we've scaled down some large text in order to be
% able to compare the difference for equivalent font sizes: (this
% gives the same output as we saw in the previous example for Warnock
% Pro Display)
% \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%    Automatic optical size                  \\
%   \scalebox{0.4}{\Huge
%    Automatic optical size}
% \end{opentypeexample}
%
% The \feat{SizeFeatures} feature (\vref{sec:sizefeature}) can be
% used to specify exactly which optical sizes will be used for ranges
% of font size. For example, something like
% \begin{verbatim}
%   \fontspec[
%     SizeFeatures={
%       {Size=-10,     OpticalSize=8 },
%       {Size= 10-14,  OpticalSize=10},
%       {Size= 14-18,  OpticalSize=14},
%       {Size=    18-, OpticalSize=18}}
%            ]{Warnock Pro}
% \end{verbatim}
%
% \clearpage
% \part{OpenType}
% \label{sec:opentype-features}
%
% \section{Introduction}
%
% TODO: explain OpenType font features.
%
% Some examples of font features have already be seen in previous
% sections.
%
% Multiple options may be given to
% any feature that accepts non-numerical input, although doing so will
% not always work. Some options will override others in generally
% obvious ways; \Verb|Numbers={OldStyle,Lining}| doesn't make much
% sense because the two options are mutually exclusive, and \XeTeX\
% will simply use the last option that is specified (in this case
% using \opt{Lining} over \opt{OldStyle}).
%
% If a feature or an option is requested that the font does not have,
% a warning is given in the console output. As mentioned in \vref{sec:quiet-warnings}
% these warnings can be suppressed by selecting the \texttt{[quiet]} package option.
%
% \section{Complete listing of OpenType font features}
%
% \subsection{Ligatures}
%
% \feat{Ligatures} refer to the replacement of two separate characters
% with a specially drawn glyph for functional or \ae sthetic reasons.
% The list of options, of which multiple may be selected at one time,
% is shown in \ref{feat:Ligatures}.
%
% \begin{features}{Ligatures}
% \otf*{Required}{rlig}
% \otf*{Common}{liga}
% \otf*{Contextual}{clig}
% \otf{Rare/Discretionary}{dlig}
% \otf{Historical}{hlig}
% \otf{TeX}{tlig/trep}
% \end{features}
%
% \begin{opentypeexample}
%   \fontspec[Ligatures=Rare]{Adobe Garamond Pro}
%    \textit{strict firefly}                \\
%   \fontspec[Ligatures=NoCommon]{Adobe Garamond Pro}
%    \textit{strict firefly}
% \end{opentypeexample}
%
% \subsection{Letters} \label{sec:letters}
% The \opt{Letters} feature specifies how the letters in the current font
% will look. OpenType fonts have options:
% \opt{Uppercase}, \opt{SmallCaps}, \opt{PetiteCaps},
% \opt{UppercaseSmallCaps}, \opt{UppercasePetiteCaps}, and
% \opt{Unicase}.
%
% \begin{features}{Letters}
% \otf{Uppercase}{case}
% \otf{SmallCaps}{smcp}
% \otf{PetiteCaps}{pcap}
% \otf{UppercaseSmallCaps}{c2sc}
% \otf{UppercasePetiteCaps}{c2pc}
% \otf{Unicase}{unic}
% \end{features}
%
% Petite caps are smaller than small caps.
% \opt{SmallCaps} and \opt{PetiteCaps}
% turn lowercase letters into the smaller caps letters,
% whereas the \opt{Uppercase...} options turn the \emph{capital} letters into
% the smaller
% caps (good, \eg, for applying to already uppercase acronyms like
% `NASA'). `Unicase' is a weird hybrid of upper and lower case
% letters.
% \begin{opentypeexample}
%   \fontspec[Letters=SmallCaps]{TeX Gyre Adventor}
%    THIS SENTENCE no verb                \\
%   \fontspec[Letters=UppercaseSmallCaps]{TeX Gyre Adventor}
%    THIS SENTENCE no verb
% \end{opentypeexample}
%
% Note that The \opt{Uppercase} option will (probably)
% not actually map letters to uppercase.
%  \note{If you want automatic uppercase letters, look to \LaTeX's
%       \cmd\MakeUppercase\ command.}
% It is designed select various
% uppercase forms for glyphs such as accents and dashes.
% \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%    UPPER-CASE EXAMPLE \\
%   \addfontfeature{Letters=Uppercase}
%    UPPER-CASE EXAMPLE
% \end{opentypeexample}
% The \feat{Kerning} feature also contains an \opt{Uppercase} option,
% which adds a small amount of spacing in between letters (see \vref{sec:kerning}).
%
% \subsection{Numbers}
%
% The \feat{Numbers} feature defines how numbers will look in the
% selected font, accepting options shown in \ref{feat:Numbers}.
%
% \begin{features}{Numbers}
% \otf{Uppercase/Lining}{lnum}
% \otf{Lowercase/OldStyle}{onum}
% \otf{Proportional}{pnum}
% \otf{Monospaced}{tnum}
% \otf{SlashedZero}{zero}
% \otf{Remap}{anum}
% \end{features}
%
% The synonyms
% \opt{Uppercase} and \opt{Lowercase} are equivalent to \opt{Lining} and
% \opt{OldStyle}, respectively.
% The differences have been shown previously
% in \vref{sec:addfontfeatures}.
% The \opt{Monospaced} option is useful for tabular material when digits need
% to be vertically aligned.
%
% The \opt{SlashedZero} option
% replaces the default zero with a slashed version to prevent
% confusion with an uppercase `O'.
%
% The \opt{Remap} option maps numerals to their Arabic or Farsi equivalents
% based on the current \opt{Language} setting (see \vref{sec:ot}). This
% is based on a \LuaTeX\ feature of the \pkg{luaotfload} package,
% not an OpenType feature.
%
% \begin{opentypeexample}
%   \fontspec[Numbers=Lining]{TeX Gyre Bonum}
%    0123456789
%   \fontspec[Numbers=SlashedZero]{TeX Gyre Bonum}
%    0123456789
% \end{opentypeexample}
%
%
% \subsection{Contextuals}
% This feature refers to glyph substitution that vary by their position;
% things like contextual swashes are accessed here.
%
% \begin{features}{Contextuals}
% \otf{Swash}{cswh}
% \otf*{Alternate}{calt}
% \otf{WordInitial}{init}
% \otf{WordFinal}{fina}
% \otf{LineFinal}{falt}
% \otf{Inner}{medi}
% \end{features}
%
% \begin{opentypeexample}
%   \fontspec{Warnock Pro} \itshape
%    Without Contextual Swashes             \\
%   \fontspec[Contextuals=Swash]{Warnock Pro}
%    With Contextual Swashes; cf. W C S
% \end{opentypeexample}
%
% Historic forms are accessed in OpenType
% fonts via the feature \feat{Style=Historic}; this is generally \emph{not}
% contextual in OpenType, which is why it is not included here.
%
% \subsection{Vertical Position}
%
% \begin{features}{VerticalPosition}
% \otf{Superior}{sups}
% \otf{Inferior}{subs}
% \otf{Numerator}{numr}
% \otf{Denominator}{dnom}
% \otf{ScientificInferior}{sinf}
% \otf{Ordinal}{ordn}
% \end{features}
%
% The \feat{VerticalPosition} feature is used to access things like
% subscript (\opt{Inferior}) and superscript (\opt{Superior}) numbers and
% letters (and a small amount of punctuation, sometimes).
% The \opt{Ordinal} option will only raise characters that are used
% in some languages directly after a number.
%
% The \opt{ScientificInferior} feature will move glyphs
% further below the baseline than the \opt{Inferior} feature.
%
% \opt{Numerator} and \opt{Denominator} should only be used for creating
% arbitrary fractions (see next section).
%
% \begin{aatexample}
%   \fontspec{Skia}
%    Normal
%   \fontspec[VerticalPosition=Superior]{Skia}
%    Superior
%   \fontspec[VerticalPosition=Inferior]{Skia}
%    Inferior                \\
%   \fontspec[VerticalPosition=Ordinal]{Skia}
%    1st 2nd 3rd 4th 0th 8abcde
% \end{aatexample}
% \begin{opentypeexample}
%   \fontspec[VerticalPosition=Superior]{Warnock Pro}
%    Sup: abdehilmnorst (-\$12,345.67)                      \\
%   \fontspec[VerticalPosition=Numerator]{Warnock Pro}
%    Numerator: 12345                                       \\
%   \fontspec[VerticalPosition=Denominator]{Warnock Pro}
%    Denominator: 12345                                     \\
%   \fontspec[VerticalPosition=ScientificInferior]{Warnock Pro}
%    Scientific Inferior: 12345                             \\
%   \fontspec[VerticalPosition=Ordinal]{Warnock Pro}
%   `Ordinals': 1st 2nd 3rd 4th 0th
% \end{opentypeexample}
%
% The \pkg{realscripts} package (yet to be released)
% (or \pkg{xltxtra} for \XeTeX)
% redefines the \cmd\textsubscript\ and
% \cmd\textsuperscript\ commands to use the above font features.
%
%
% \subsection{Fractions}
%
% \begin{features}{Fractions}
% \otf{On}{frac}
% \otf{Alternate}{afrc}
% \end{features}
%
% For OpenType fonts use a regular text slash to create fractions:
% \begin{opentypeexample}
%   \fontspec{Hiragino Maru Gothic Pro W4}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
%   \addfontfeature{Fractions=On}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
% \end{opentypeexample}
%
% Some (Asian fonts predominantly) also provide for the
% \opt{Alternate} feature:
% \begin{opentypeexample}
%   \fontspec{Hiragino Maru Gothic Pro W4}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
%   \addfontfeature{Fractions=Alternate}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
% \end{opentypeexample}
%
% \subsection{StylisticSet}
%
% This feature selects a `Stylistic Set' variation,
% specified numerically. These correspond to OpenType
% features |ss01|, |ss02|, etc.
%
% Here are two examples from the Junicode
% font\footnote{\url{http://junicode.sf.net}}; thanks to Adam
% Buchbinder for the suggestion.
% This example shows insular (ancient) letterforms:
% \begin{opentypeexample}
%   \fontspec{Junicode}
%    Insular forms. \\
%   \addfontfeature{StylisticSet=2}
%    Insular forms. \\
% \end{opentypeexample}
% And here is shown enlarged minuscules: (capital letters remain
% unchanged)
% \begin{opentypeexample}
%   \fontspec{Junicode}
%    ENLARGED Minuscules. \\
%   \addfontfeature{StylisticSet=6}
%    ENLARGED Minuscules. \\
% \end{opentypeexample}
%
% (This is a synonym of the \feat{Variant} feature for \AAT\ fonts.)
% See \vref{sec:newfeatures} for a way to assign names to stylistic sets,
% which should be done on a per-font basis.
%
% \subsection{Alternates}
% Selection of the \feat{Alternate} feature again
% must be done numerically.
%
% For OpenType fonts, this option is used to access numerical
% variations of the raw |salt| feature. I can't show an example,
% but here's how it would be used:
% \begin{verbatim}
%   \fontspec[Alternate=1]{Garamond Premier Pro}
% \end{verbatim}
% Numbering starts from |0| for the first stylistic alternate.
% Note that the \texttt{Style=Alternate} option is equivalent
% to \texttt{Alternate=0} to access the default case.
%
% See \vref{sec:newfeatures} for a way to assign names to alternates,
% which should be done on a per-font basis.
%
% \subsection{Style}
%
% \begin{features}{Style}
% \otf{Alternate}{salt}
% \otf{Italic}{ital}
% \otf{Ruby}{ruby}
% \otf{Swash}{swsh}
% \otf{Historic}{hist}
% \otf{TitlingCaps}{titl}
% \otf{HorizontalKana}{hkna}
% \otf{VerticalKana}{vkna}
% \end{features}
%
% `Ruby' refers to a small optical size, used in
% Japanese typography for annotations.
% For fonts with multiple |salt| OpenType features,
% use the fontspec \feat{Alternate} feature instead.
%
% \setexsize\Large
%  \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%    K Q R k v w y                      \\
%   \addfontfeature{Style=Alternate}
%    K Q R k v w y
% \end{opentypeexample}
% Note the occasional inconsistency with which font features are labelled; a long-tailed `Q' could turn up anywhere!
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{Adobe Jenson Pro}
%    M Q Z                              \\
%   \addfontfeature{Style=Historic}
%    M Q Z
% \end{opentypeexample}
% \setexsize\Large
% \begin{example}
%   \fontspec{Adobe Garamond Pro}
%    TITLING CAPS                       \\
%   \addfontfeature{Style=TitlingCaps}
%    TITLING CAPS
% \end{example}
%
% Two features in one example; \opt{Italic} affects the Latin text and \opt{Ruby} the Japanese:
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{Hiragino Mincho Pro W3}
%    Latin ようこそ ワカヨタレソ        \\
%   \addfontfeature{Style={Italic, Ruby}}
%    Latin ようこそ ワカヨタレソ
% \end{opentypeexample}
% Note the difference here between the default and the horizontal style kana:
% \setexsize\Large
% \begin{aatexample}
%    \fontspec{Hiragino Mincho Pro}
%     ようこそ ワカヨタレソ  \\
%   {\addfontfeature{Style=HorizontalKana}
%     ようこそ ワカヨタレソ} \\
%   {\addfontfeature{Style=VerticalKana}
%     ようこそ ワカヨタレソ}
% \end{aatexample}
%
%
%
% \subsection{Diacritics}
% Specifies how diacritics should be placed.
% These will usually be controlled automatically
% according to the Script setting.
%
% \begin{features}{Diacritics}
% \otf*{MarkToBase}{mark}
% \otf*{MarkToMark}{mkmk}
% \otf*{AboveBase}{abvm}
% \otf*{BelowBase}{blwm}
% \end{features}
%
% \subsection{Kerning}\label{sec:kerning}
% Specifies how inter-glyph spacing should behave.
%
% \begin{features}{Kerning}
% \otf{Uppercase}{cpsp}
% \otf*[Off]{On}{kern}
% \end{features}
%
% As briefly mentioned previously at the end of \vref{sec:letters},
% the \opt{Uppercase} option will add a small amount of tracking between uppercase letters:
% \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%    UPPER-CASE EXAMPLE \\
%   \addfontfeature{Kerning=Uppercase}
%    UPPER-CASE EXAMPLE
% \end{opentypeexample}
%
%
% \subsection{CJK shape}
%
% \begin{features}{CJKShape}
% \otf{Traditional}{trad}
% \otf{Simplified} {smpl}
% \otf{JIS1978}    {jp78}
% \otf{JIS1983}    {jp83}
% \otf{JIS1990}    {jp90}
% \otf{Expert}     {expt}
% \otf{NLC}        {nlck}
% \end{features}
%
% There have been many standards for how CJK ideographic
% glyphs are `supposed' to look. Some fonts will contain many alternate
% glyphs available in order to be able to display these gylphs
% correctly in whichever form is appropriate. Both \AAT\ and OpenType
% fonts support the following \feat{CJKShape} options:
% \opt{Traditional}, \opt{Simplified}, \opt{JIS1978}, \opt{JIS1983},
% \opt{JIS1990}, and \opt{Expert}. OpenType also supports the \opt{NLC} option.
% \setexsize\LARGE
% \begin{opentypeexample}
%   \fontspec{Hiragino Mincho Pro}
%   {\addfontfeature{CJKShape=Traditional}
%    唖噛躯 妍并訝 }                          \\
%   {\addfontfeature{CJKShape=NLC}
%    唖噛躯 妍并訝 }                          \\
%   {\addfontfeature{CJKShape=Expert}
%    唖噛躯 妍并訝 }
% \end{opentypeexample}
%
% \subsection{Character width}\label{sec:CharacterWidth}
% Many Asian fonts are equipped with variously spaced characters for
% shoe-horning into their generally monospaced text.
% These are
% accessed through the \feat{CharacterWidth} feature.
%
% \begin{features}{CharacterWidth}
% \otf{Proportional}{pwid}
% \otf{Full}        {fwid}
% \otf{Half}        {hwid}
% \otf{Third}       {twid}
% \otf{Quarter}     {qwid}
% \otf{AlternateProportional}{palt}
% \otf{AlternateHalf}{halt}
% \end{features}
%
% Japanese alphabetic glyphs (in Hiragana or Katakana) may be typeset
% proportionally, to better fit horizontal measures, or monospaced, to
% fit into the rigid grid imposed by ideographic typesetting. In this
% latter case, there are also half-width forms for squeezing more kana
% glyphs (which are less complex than the kanji they are amongst) into
% a given block of space. The same features are given to roman letters
% in Japanese fonts, for typesetting foreign words in the same style
% as the surrounding text.
% \begin{opentypeexample}
%   \def\test{\makebox[2cm][l]{ようこそ}% %             \makebox[2.5cm][l]{ワカヨタレソ}% %             \makebox[2.5cm][l]{abcdef}}
%   \fontspec{Hiragino Mincho Pro}
%   {\addfontfeature{CharacterWidth=Proportional}\test}\\
%   {\addfontfeature{CharacterWidth=Full}\test}\\
%   {\addfontfeature{CharacterWidth=Half}\test}
% \end{opentypeexample}
% The same situation occurs with numbers, which are provided in
% increasingly illegible compressed forms:
% \setexsize\large
% \begin{aatexample}
%   \fontspec[Renderer=AAT]{Hiragino Mincho Pro}
%   {\addfontfeature{CharacterWidth=Full}
%    ---12321---}\\
%   {\addfontfeature{CharacterWidth=Half}
%    ---1234554321---}\\
%   {\addfontfeature{CharacterWidth=Third}
%    ---123456787654321---}\\
%   {\addfontfeature{CharacterWidth=Quarter}
%    ---12345678900987654321---}
% \end{aatexample}
% The option \opt{CharacterWidth=Full} doesn't work with the
% default OpenType font renderer (ICU) due to a bug in the Hiragino fonts.
%
% \subsection{Vertical typesetting}
%
% TODO!
%
%
% \subsection{OpenType scripts and languages}\label{sec:ot}
%
% When dealing with fonts that include glyphs for various languages,
% they may contain different font features for the different character
% sets and languages it supports. These may be selected with the
% \feat{Script} and \feat{Language} features. The possible options are
% tabulated in \vref{tab:ot-scpt} and \vref{tab:ot-lang},
% respectively. When a script or language is requested that is not
% supported by the current font, a warning is printed in the console output.
%
% Because these font features can
% change which features are able to be selected for the font, they are selected
% by \pkg{fontspec} before all others and will specifically select the \opt{ICU}
% renderer for this font, as described in \vref{sec:renderer}.
% \iffalse
% \subsubsection{\feat{Script} examples}
%
% In the following examples, the same font is used to typeset the
% verbatim input and the \XeTeX\ output. Because the \opt{Script} is
% only specified for the output, the text is rendered incorrectly in
% the verbatim input. Many examples of incorrect diacritic spacing as
% well as a lack of contextual ligatures and rearrangement can be
% seen. Thanks to \name{Jonathan Kew}, \name{Yves Codet} and
% \name{Gildas Hamel} for their contributions towards these examples.
%
% \begingroup
% \setverbwidth{0.5\textwidth}
% \begin{opentypeexample}
%   \fontspec[Script=Arabic]{Code2000}
%    العربي
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Devanagari]{Code2000}
%    हिन्दी
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Bengali]{Code2000}
%    লেখ
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Gujarati]{Code2000}
%    મર્યાદા-સૂચક નિવેદન
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Malayalam]{Code2000}
%    നമ്മുടെ പാരബര്യ
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Gurmukhi]{Code2000}
%    ਆਦਿ ਸਚੁ ਜੁਗਾਦਿ ਸਚੁ
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Tamil]{Code2000}
%    தமிழ் தேடி
% \end{opentypeexample}
% \begin{opentypeexample}
%   \fontspec[Script=Hebrew]{Code2000}
%    רִדְתָּֽהּ
% \end{opentypeexample}
% \endgroup
%
% \subsubsection{\feat{Language} examples}
%
% Vietnamese requires careful diacritic placement:
% \begingroup
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{Doulos SIL}
%    cấp số mỗi \\
%   \addfontfeature{Language=Vietnamese}
%    cấp số mỗi
% \end{opentypeexample}
% \noindent Moldavian, as a typical example from Ralf Stubner's FPL Neu font:
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{FPL Neu}
%    Ş ş Ţ ţ  \\
%   \addfontfeature{Language=Moldavian}
%    Ş ş Ţ ţ
% \end{opentypeexample}
% \endgroup
% \fi
%
% \subsubsection{Defining new scripts and languages}
%
% \DescribeMacro{\newfontscript}
% \DescribeMacro{\newfontlanguage}
% Further scripts and languages may be added with the \cmd\newfontscript\
% and \cmd\newfontlanguage\ commands. For example,
% \begin{Verbatim}
%   \newfontscript{Arabic}{arab}
%   \newfontlanguage{Turkish}{TUR}
% \end{Verbatim}
% The first argument is the \pkg{fontspec} name, the second the OpenType
% definition. The advantage to using these commands rather than \cmd\newfontfeature\
% (see \vref{sec:newfeatures}) is the error-checking that is performed when
% the script or language is requested.
%
% \begin{table}[!hbp]
% \def\dup{\makebox[0pt][r]{\textcolor{red}{\P}}}% % \setlength\columnseprule{0pt}
%   \hrule
%   \begin{multicols}{4}\setlength\parindent{0pt}
%     \sffamily\scriptsize
%     Arabic \par Armenian \par Balinese \par Bengali \par Bopomofo \par Braille \par Buginese \par Buhid \par Byzantine Music \par Canadian Syllabics \par Cherokee \par \dup CJK \par \dup CJK Ideographic \par Coptic \par Cypriot Syllabary \par Cyrillic \par Default \par Deseret \par Devanagari \par Ethiopic \par Georgian \par Glagolitic \par Gothic \par Greek \par Gujarati \par Gurmukhi \par Hangul Jamo \par Hangul \par Hanunoo \par Hebrew \par \dup Hiragana and Katakana \par \dup Kana \par Javanese \par Kannada \par Kharosthi \par Khmer \par Lao \par Latin \par Limbu \par Linear B \par Malayalam \par \dup Math \par \dup Maths \par Mongolian \par Musical Symbols \par Myanmar \par N'ko \par Ogham \par Old Italic \par Old Persian Cuneiform \par Oriya \par Osmanya \par Phags-pa \par Phoenician \par Runic \par Shavian \par Sinhala \par Sumero-Akkadian Cuneiform \par Syloti Nagri \par Syriac \par Tagalog \par Tagbanwa \par Tai Le \par Tai Lu \par Tamil \par Telugu \par Thaana \par Thai \par Tibetan \par Tifinagh \par Ugaritic Cuneiform \par Yi
%   \end{multicols}
%   \hrule
%   \caption{Defined \opt{Script}s for OpenType fonts. Aliased names are shown in adjacent positions marked with red pilcrows ({\sffamily\textcolor{red}{\P}}), defined in \texttt{fontspec.cfg}.}
%   \label{tab:ot-scpt}
% \end{table}
%
% \begin{table}[p]
%   \vspace*{-3cm}
%   \hspace{-3cm}
%   \begin{minipage}{\linewidth+4cm}
%   \setlength\columnseprule{0pt}
%   \hrule
%   \begin{multicols}{6}
%     \everypar{\setlength\parindent{0pt}\setlength\hangindent{2em}}
%     \sffamily\footnotesize\raggedright
%     Abaza \par Abkhazian \par Adyghe \par Afrikaans \par Afar \par Agaw \par Altai \par Amharic \par Arabic \par Aari \par Arakanese \par Assamese \par Athapaskan \par Avar \par Awadhi \par Aymara \par Azeri \par Badaga \par Baghelkhandi \par Balkar \par Baule \par Berber \par Bench \par Bible Cree \par Belarussian \par Bemba \par Bengali \par Bulgarian \par Bhili \par Bhojpuri \par Bikol \par Bilen \par Blackfoot \par Balochi \par Balante \par Balti \par Bambara \par Bamileke \par Breton \par Brahui \par Braj Bhasha \par Burmese \par Bashkir \par Beti \par Catalan \par Cebuano \par Chechen \par Chaha Gurage \par Chattisgarhi \par Chichewa \par Chukchi \par Chipewyan \par Cherokee \par Chuvash \par Comorian \par Coptic \par Cree \par Carrier \par Crimean Tatar \par Church Slavonic \par Czech \par Danish \par Dargwa \par Woods Cree \par German \par Default \par Dogri \par Divehi \par Djerma \par Dangme \par Dinka \par Dungan \par Dzongkha \par Ebira \par Eastern Cree \par Edo \par Efik \par Greek \par English \par Erzya \par Spanish \par Estonian \par Basque \par Evenki \par Even \par Ewe \par French Antillean \par Farsi \par Finnish \par Fijian \par Flemish \par Forest Nenets \par Fon \par Faroese \par French \par Frisian \par Friulian \par Futa \par Fulani \par Ga \par Gaelic \par Gagauz \par Galician \par Garshuni \par Garhwali \par Ge'ez \par Gilyak \par Gumuz \par Gondi \par Greenlandic \par Garo \par Guarani \par Gujarati \par Haitian \par Halam \par Harauti \par Hausa \par Hawaiin \par Hammer-Banna \par Hiligaynon \par Hindi \par High Mari \par Hindko \par Ho \par Harari \par Croatian \par Hungarian \par Armenian \par Igbo \par Ijo \par Ilokano \par Indonesian \par Ingush \par Inuktitut \par Irish \par Irish Traditional \par Icelandic \par Inari Sami \par Italian \par Hebrew \par Javanese \par Yiddish \par Japanese \par Judezmo \par Jula \par Kabardian \par Kachchi \par Kalenjin \par Kannada \par Karachay \par Georgian \par Kazakh \par Kebena \par Khutsuri Georgian \par Khakass \par Khanty-Kazim \par Khmer \par Khanty-Shurishkar \par Khanty-Vakhi \par Khowar \par Kikuyu \par Kirghiz \par Kisii \par Kokni \par Kalmyk \par Kamba \par Kumaoni \par Komo \par Komso \par Kanuri \par Kodagu \par Korean Old Hangul \par Konkani \par Kikongo \par Komi-Permyak \par Korean \par Komi-Zyrian \par Kpelle \par Krio \par Karakalpak \par Karelian \par Karaim \par Karen \par Koorete \par Kashmiri \par Khasi \par Kildin Sami \par Kui \par Kulvi \par Kumyk \par Kurdish \par Kurukh \par Kuy \par Koryak \par Ladin \par Lahuli \par Lak \par Lambani \par Lao \par Latin \par Laz \par L-Cree \par Ladakhi \par Lezgi \par Lingala \par Low Mari \par Limbu \par Lomwe \par Lower Sorbian \par Lule Sami \par Lithuanian \par Luba \par Luganda \par Luhya \par Luo \par Latvian \par Majang \par Makua \par Malayalam Traditional \par Mansi \par Marathi \par Marwari \par Mbundu \par Manchu \par Moose Cree \par Mende \par Me'en \par Mizo \par Macedonian \par Male \par Malagasy \par Malinke \par Malayalam Reformed \par Malay \par Mandinka \par Mongolian \par Manipuri \par Maninka \par Manx Gaelic \par Moksha \par Moldavian \par Mon \par Moroccan \par Maori \par Maithili \par Maltese \par Mundari \par Naga-Assamese \par Nanai \par Naskapi \par N-Cree \par Ndebele \par Ndonga \par Nepali \par Newari \par Nagari \par Norway House Cree \par Nisi \par Niuean \par Nkole \par N'ko \par Dutch \par Nogai \par Norwegian \par Northern Sami \par Northern Tai \par Esperanto \par Nynorsk \par Oji-Cree \par Ojibway \par Oriya \par Oromo \par Ossetian \par Palestinian Aramaic \par Pali \par Punjabi \par Palpa \par Pashto \par Polytonic Greek \par Pilipino \par Palaung \par Polish \par Provencal \par Portuguese \par Chin \par Rajasthani \par R-Cree \par Russian Buriat \par Riang \par Rhaeto-Romanic \par Romanian \par Romany \par Rusyn \par Ruanda \par Russian \par Sadri \par Sanskrit \par Santali \par Sayisi \par Sekota \par Selkup \par Sango \par Shan \par Sibe \par Sidamo \par Silte Gurage \par Skolt Sami \par Slovak \par Slavey \par Slovenian \par Somali \par Samoan \par Sena \par Sindhi \par Sinhalese \par Soninke \par Sodo Gurage \par Sotho \par Albanian \par Serbian \par Saraiki \par Serer \par South Slavey \par Southern Sami \par Suri \par Svan \par Swedish \par Swadaya Aramaic \par Swahili \par Swazi \par Sutu \par Syriac \par Tabasaran \par Tajiki \par Tamil \par Tatar \par TH-Cree \par Telugu \par Tongan \par Tigre \par Tigrinya \par Thai \par Tahitian \par Tibetan \par Turkmen \par Temne \par Tswana \par Tundra Nenets \par Tonga \par Todo \par Turkish \par Tsonga \par Turoyo Aramaic \par Tulu \par Tuvin \par Twi \par Udmurt \par Ukrainian \par Urdu \par Upper Sorbian \par Uyghur \par Uzbek \par Venda \par Vietnamese \par Wa \par Wagdi \par West-Cree \par Welsh \par Wolof \par Tai Lue \par Xhosa \par Yakut \par Yoruba \par Y-Cree \par Yi Classic \par Yi Modern \par Chinese Hong Kong \par Chinese Phonetic \par Chinese Simplified \par Chinese Traditional \par Zande \par Zulu
%   \end{multicols}
%   \hspace{4pt}
%   \hrule
%   \caption{Defined \opt{Language}s for OpenType fonts.
%     Note that they are sorted alphabetically \emph{not}
%     by name but by OpenType tag, which is a little irritating, really.}
%   \label{tab:ot-lang}
%  \end{minipage}
% \end{table}
%
%
%
% \clearpage
% \part{Fonts and features with \XeTeX}
% \label{sec:xetex-features}
%
% \section{\XeTeX-only font features}
%
% The features described here are available for any font
% selected by \pkg{fontspec}.
%
% \subsection{Mapping}
%
% \feat{Mapping} enables a \XeTeX\ text-mapping scheme.
% \begin{example}
%   \fontspec[Mapping=tex-text]{Cochin}
%   ``!`A small amount of---text!''
% \end{example}
% Using the |tex-text| mapping is also equivalent to writing |Ligatures=TeX|.
% The use of the latter syntax is recommended for better compatibility with
% \LuaTeX\ documents.
%
%
% \subsection{Letter spacing}
% Letter spacing, or tracking, is the term given to adding (or subtracting) a small amount of horizontal space in between adjacent characters. It is specified with the \feat{LetterSpace}, which takes a numeric argument.
%
% The letter spacing parameter is a normalised additive factor (not a scaling factor); it is defined as a percentage of the font size. That is, for a 10\,pt font, a letter spacing parameter of `|1.0|' will add 0.1\,pt between each letter.
% \begin{example}
%   \fontspec{Didot}
%   \addfontfeature{LetterSpace=0.0}
%   USE TRACKING FOR DISPLAY CAPS TEXT \\
%   \addfontfeature{LetterSpace=2.0}
%   USE TRACKING FOR DISPLAY CAPS TEXT
% \end{example}
% This functionality \emph{should not be used for lowercase text}, which is spacing correctly to begin with, but it can be very useful, in small amounts, when setting small caps or all caps titles.
% Also see the OpenType \opt{Uppercase}
% option of the \feat{Letters} feature (\vref*{sec:letters}).
%
% \subsection{Font transformations}
%
% In rare situations users may want to mechanically distort the shapes of the glyphs in the current font. Please don't overuse these features; they can be extremely ugly if overused.
%
% \begin{example}
%   \fontspec{Charis SIL} \emph{ABCxyz} \quad
%   \fontspec[FakeSlant=0.2]{Charis SIL} ABCxyz
% \end{example}
%
% \begin{example}
%   \fontspec{Charis SIL}  ABCxyz \quad
%   \fontspec[FakeStretch=1.2]{Charis SIL} ABCxyz
% \end{example}
%
% \begin{example}
%   \fontspec{Charis SIL} \textbf{ABCxyz} \quad
%   \fontspec[FakeBold=1.5]{Charis SIL} ABCxyz
% \end{example}
%
% If values are omitted, their defaults are as shown above.
%
%
% \subsection{Different font technologies: \AAT\ and ICU}\label{sec:renderer}
%
% \XeTeX\ supports two rendering technologies for typesetting, selected with
% the \feat{Renderer} font feature. The first, \opt{AAT}, is
% that provided (only) by \MacOSX\ itself. The second, \opt{ICU},
% is an open source OpenType interpreter. It provides much greater support for
% OpenType features, notably contextual arrangement, over \opt{AAT}.
%
% In general, this feature will not need to be explicitly called: for OpenType
% fonts, the \opt{ICU} renderer is used automatically, and for \AAT\ fonts,
% \opt{AAT} is chosen by default. Some fonts, however, will contain font tables
% for \emph{both} rendering technologies, such as the Hiragino Japanese fonts
% distributed with \MacOSX, and in these cases the choice may be required.
%
% Among some other font features only available through a specific renderer,
% \opt{ICU} provides for the \feat{Script} and \feat{Language} features, which allow
% different font behaviour for different alphabets and languages; see \vref{sec:ot}
% for the description of these features. {\em Because these font features can
% change which features are able to be selected for the font instance, they are selected
% by \pkg{fontspec} before all others and will automatically and without warning
% select the \opt{ICU} renderer.}
%
%
% \subsection{Optical font sizes} \label{sec:opticalsize}
%
% Multiple Master fonts are parameterised over
% orthogonal font axes, allowing continuous selection along such
% features as weight, width, and optical size~(see \vref{sec:mm} for
% further details). Whereas an OpenType font will have only a few separate
% optical sizes, a Multiple Master font's optical size can be
% specified over a continuous range. Unfortunately, this flexibility makes
% it harder to create an automatic interface through \LaTeX, and the
% optical size for a Multiple Master font must always be specified
% explicitly.
% \begin{Verbatim}
%   \fontspec[OpticalSize=11]{Minion MM Roman}
%    MM optical size test                    \\
%   \fontspec[OpticalSize=47]{Minion MM Roman}
%    MM optical size test                    \\
%   \fontspec[OpticalSize=71]{Minion MM Roman}
%    MM optical size test                    \\
% \end{Verbatim}
%
%
%
%
% \section{\MacOSX's \AAT\ fonts}
% \label{sec:aat-features}
%
% \MacOSX's font technology began life before the ubiquitous-OpenType era
% and revolved around the Apple-invented `\AAT' font format. This format
% had some advantages (and other disadvantages) but it never became widely
% popular in the font world.
%
% Nonetheless, this is the font format that was first supported by \XeTeX\
% (due to its pedigree on \MacOSX\ in the first place) and was the first
% font format supported by \pkg{fontspec}. A number of fonts distributed with
% \MacOSX\ are still in the \AAT\ format, such as `Skia'. Documents
% that use these fonts should be compiled with \XeLaTeX\ using the
% \texttt{xdv2pdf} driver, as opposed to the default \texttt{xdvipdfmx}. E.g.,
% \begin{verbatim}
%   xelatex -output-driver="xdv2pdf" filename.tex
% \end{verbatim}
%
% \MacOSX\ also supports Multiple Master fonts, which are discussed
% in \ref{sec:mm}.
%
% \subsection{Ligatures}
%
% \feat{Ligatures} refer to the replacement of two separate characters
% with a specially drawn glyph for functional or \ae sthetic reasons.
% For \AAT\ fonts, you may choose from any combination of \opt{Required},
% \opt{Common}, \opt{Rare} (or \opt{Discretionary}), \opt{Logos}, \opt{Rebus},
% \opt{Diphthong}, \opt{Squared}, \opt{AbbrevSquared}, and \opt{Icelandic}.
%
% Some other Apple \AAT\ fonts have those `Rare' ligatures contained in
% the \opt{Icelandic} feature. Notice also that the old \TeX\ trick of
% splitting up a ligature with an empty brace pair does not work in
% \XeTeX; you must use a 0\,pt kern or \cs{hbox} (\eg, \cs{null}) to
% split the characters up.
%
% \subsection{Letters} \label{sec:letters}
% The \opt{Letters} feature specifies how the letters in the current font
% will look. For \AAT\ fonts, you may choose from \opt{Normal},
% \opt{Uppercase}, \opt{Lowercase}, \opt{SmallCaps}, and
% \opt{InitialCaps}.
%
%
% \subsection{Numbers}
% The \feat{Numbers} feature defines how numbers will look in the
% selected font. For both \AAT, they may be a
% combination of \opt{Lining} or \opt{OldStyle} and \opt{Proportional} or
% \opt{Monospaced} (the latter is good for tabular material). The synonyms
% \opt{Uppercase} and \opt{Lowercase} are equivalent to \opt{Lining} and
% \opt{OldStyle}, respectively. The differences have been shown previously
% in \vref{sec:addfontfeatures}.
%
% \subsection{Contextuals} \label{sec:contextuals}
% This feature refers to glyph substitution that vary by their position;
% things like contextual swashes are implemented here
% The options for \AAT\ fonts are
% \opt{WordInitial}, \opt{WordFinal}, \opt{LineInitial},
% \opt{LineFinal}, and \opt{Inner} (also called `non-final' sometimes). As
% non-exclusive selectors, like the ligatures, you can turn them off
% by prefixing their name with \opt{No}.
% \begin{aatexample}
%   \newfontface\fancy
%       [Contextuals={WordInitial,WordFinal}]
%                        {Hoefler Text Italic}
%   \fancy where is all the vegemite
% \end{aatexample}
% \begin{aatexample}
%   \fontspec[Contextuals=Inner]{Hoefler Text}
%   `Inner' swashes can \emph{sometimes}    \\
%    contain the archaic long~s.
% \end{aatexample}
%
%
% \subsection{Vertical position}
% The \feat{VerticalPosition} feature is used to access things like
% subscript (\opt{Inferior}) and superscript (\opt{Superior}) numbers and
% letters (and a small amount of punctuation, sometimes).
% The \opt{Ordinal} option is (supposed to be)
% contextually sensitive to only raise characters that appear directly
% after a number.
% \begin{aatexample}
%   \fontspec{Skia}
%    Normal
%   \fontspec[VerticalPosition=Superior]{Skia}
%    Superior
%   \fontspec[VerticalPosition=Inferior]{Skia}
%    Inferior                \\
%   \fontspec[VerticalPosition=Ordinal]{Skia}
%    1st 2nd 3rd 4th 0th 8abcde
% \end{aatexample}
%
% The \pkg{xltxtra} package redefines the \cmd\textsubscript\ and
% \cmd\textsuperscript\ commands to use the above font features.
%
% \subsection{Fractions}
% Many fonts come with the capability to typeset various forms of
% fractional material. This is accessed in \pkg{fontspec} with the
% \feat{Fractions} feature, which may be turned \opt{On} or \opt{Off}
% in both \AAT\ and OpenType fonts.
%
% In \AAT\ fonts, the `fraction slash' or solidus character, is
% to be used to create fractions. When \feat{Fractions} are turned
% \opt{On}, then only pre-drawn fractions will be used.
% \begin{aatexample}
%   \fontspec[Fractions=On]{Skia}
%    1⁄2 \quad 5⁄6 \\ % fraction slash
%    1/2 \quad 5/6    % regular  slash
% \end{aatexample}
% Using the \opt{Diagonal} option (\AAT\ only), the font will attempt
% to create the fraction from superscript and subscript
% characters. This is shown in the following example:
% \begin{aatexample}
%   \fontspec[Fractions=Diagonal]{Skia}
%          13579⁄24680 \\ % fraction slash
%    \quad 13579/24680    % regular  slash
% \end{aatexample}
%
% Some (Asian fonts predominantly) also provide for the
% \opt{Alternate} feature:
% \begin{opentypeexample}
%   \fontspec{Hiragino Maru Gothic Pro W4}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
%   \addfontfeature{Fractions=Alternate}
%    1/2 \quad 1/4 \quad 5/6 \quad 13579/24680 \\
% \end{opentypeexample}
% The \pkg{xltxtra} package provides a \cmd\vfrac\ command
% for creating arbitrary so-called `vulgar' fractions:
% \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%   \vfrac{13579}{24680}
% \end{opentypeexample}
%
%
% \subsection{Variants}
% The \feat{Variant} feature takes a single numerical input for
% choosing different alphabetic shapes. Don't mind my fancy example
% \texttt{:)} I'm just looping through the nine~(\,!\,) variants of
% Zapfino.
% \setexsize\Huge
% \def\firstline{2}\def\lastline{9}
% \begin{aatexample}
%   \rule{0pt}{2cm}% %   \newcounter{var}\newcounter{trans}
%   \whiledo{\value{var}<9}{% %     \stepcounter{trans}% %     \fontspec[Variant=\thevar,
%       Color=005599\thetrans\thetrans]{Zapfino}% %     \makebox[0.75\width]{d}% %     \stepcounter{var}}
% \end{aatexample}
%
% See \vref{sec:newfeatures} for a way to assign names to variants,
% which should be done on a per-font basis.
%
% \subsection{Alternates}
%
% Selection of \feat{Alternate}s \emph{again}
% must be done numerically. Here's an example with an \AAT\ font:
% \begin{aatexample}
%   \fontspec[Alternate=0]{Hoefler Text Italic}
%    Sphinx Of Black Quartz, {\scshape Judge My Vow} \\
%   \fontspec[Alternate=1]{Hoefler Text Italic}
%    Sphinx Of Black Quartz, {\scshape Judge My Vow}
% \end{aatexample}
% See \vref{sec:newfeatures} for a way to assign names to alternates,
% which should be done on a per-font basis.
%
%
% \subsection{Style}
% The options of the \feat{Style} feature
% are defined in \AAT\ as one of the following: \opt{Display},
% \opt{Engraved}, \opt{IlluminatedCaps}, \opt{Italic},
% \opt{Ruby},\footnotemark\ \opt{TallCaps}, or \opt{TitlingCaps}.
% \footnotetext{`Ruby' refers to a small optical size, used in
% Japanese typography for annotations.}
%
% \setexsize\Large
%  \begin{opentypeexample}
%   \fontspec{Warnock Pro}
%    K Q R k v w y                      \\
%   \addfontfeature{Style=Alternate}
%    K Q R k v w y
% \end{opentypeexample}
% Note the occasional inconsistency with which font features are labelled; a long-tailed `Q' could turn up anywhere!
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{Adobe Jenson Pro}
%    M Q Z                              \\
%   \addfontfeature{Style=Historic}
%    M Q Z
% \end{opentypeexample}
% \setexsize\Large
% \begin{example}
%   \fontspec{Adobe Garamond Pro}
%    TITLING CAPS                       \\
%   \addfontfeature{Style=TitlingCaps}
%    TITLING CAPS
% \end{example}
% Two features in one example; \opt{Italic} affects the Latin text and \opt{Ruby} the Japanese:
% \setexsize\Large
% \begin{opentypeexample}
%   \fontspec{Hiragino Mincho Pro W3}
%    Latin ようこそ ワカヨタレソ        \\
%   \addfontfeature{Style={Italic, Ruby}}
%    Latin ようこそ ワカヨタレソ
% \end{opentypeexample}
% Note the difference here between the default and the horizontal style kana:
% \setexsize\Large
% \begin{aatexample}
%    \fontspec{Hiragino Mincho Pro}
%     ようこそ ワカヨタレソ  \\
%   {\addfontfeature{Style=HorizontalKana}
%     ようこそ ワカヨタレソ} \\
%   {\addfontfeature{Style=VerticalKana}
%     ようこそ ワカヨタレソ}
% \end{aatexample}
%
%
%
%
%
% \subsection{CJK shape}
% There have been many standards for how CJK ideographic
% glyphs are `supposed' to look. Some fonts will contain many alternate
% glyphs available in order to be able to display these gylphs
% correctly in whichever form is appropriate. Both \AAT\ and OpenType
% fonts support the following \feat{CJKShape} options:
% \opt{Traditional}, \opt{Simplified}, \opt{JIS1978}, \opt{JIS1983},
% \opt{JIS1990}, and \opt{Expert}. OpenType also supports the \opt{NLC} option.
%
% \subsection{Character width}\label{sec:CharacterWidth}
% Many Asian fonts are equipped with variously spaced characters for
% shoe-horning into their generally monospaced text.
% These are
% accessed through the \feat{CharacterWidth} feature.
%   \note{Apple
%   seems to be adapting its \AAT\ features in this regard (at least in
%   the fonts it distributes with \MacOSX) to have a one-to-one
%   correspondence with the equivalent OpenType features. Previously
%   \AAT\ was more fine grained, but naturally they're not documenting
%   their \AAT\ tables any more, so if the following features don't work
%   for a specific font let me know and I'll try and see if anything
%   can be salvaged from the situation.}
% For now, OpenType and \AAT\
% share the same six options for this feature: \opt{Proportional},
% \opt{Full}, \opt{Half}, \opt{Third},
% \opt{Quarter}, \opt{AlternateProportional}, and
% \opt{AlternateHalf}. \AAT\ also allows \opt{Default} to return to
% whatever was originally specified.
%
% Japanese alphabetic glyphs (in Hiragana or Katakana) may be typeset
% proportionally, to better fit horizontal measures, or monospaced, to
% fit into the rigid grid imposed by ideographic typesetting. In this
% latter case, there are also half-width forms for squeezing more kana
% glyphs (which are less complex than the kanji they are amongst) into
% a given block of space. The same features are given to roman letters
% in Japanese fonts, for typesetting foreign words in the same style
% as the surrounding text.
% \begin{opentypeexample}
%   \def\test{\makebox[2cm][l]{ようこそ}% %             \makebox[2.5cm][l]{ワカヨタレソ}% %             \makebox[2.5cm][l]{abcdef}}
%   \fontspec{Hiragino Mincho Pro}
%   {\addfontfeature{CharacterWidth=Proportional}\test}\\
%   {\addfontfeature{CharacterWidth=Full}\test}\\
%   {\addfontfeature{CharacterWidth=Half}\test}
% \end{opentypeexample}
% The same situation occurs with numbers, which are provided in
% increasingly illegible compressed forms:
% \setexsize\large
% \begin{aatexample}
%   \fontspec[Renderer=AAT]{Hiragino Mincho Pro}
%   {\addfontfeature{CharacterWidth=Full}
%    ---12321---}\\
%   {\addfontfeature{CharacterWidth=Half}
%    ---1234554321---}\\
%   {\addfontfeature{CharacterWidth=Third}
%    ---123456787654321---}\\
%   {\addfontfeature{CharacterWidth=Quarter}
%    ---12345678900987654321---}
% \end{aatexample}
% The option \opt{CharacterWidth=Full} doesn't work with the
% default OpenType font renderer (ICU) due to a bug in the Hiragino fonts.
%
%
% \subsection{Annotation}
% Various Asian fonts are equipped with a more extensive range of
% numbers and numerals in different forms.
% For OpenType fonts, the only option supported is \opt{On} and \opt{Off}:
% \begin{opentypeexample}
%   \fontspec{Hiragino Maru Gothic Pro}
%    1 2 3 4 5 6 7 8 9                         \\
%   \addfontfeature{Annotation=On}
%    1 2 3 4 5 6 7 8 9
% \end{opentypeexample}
% I'm not sure if \XeTeX\ can access alternate annotation
% forms, even if they exist (as in this case) in the font.
%
%
% \subsection{Vertical typesetting}
%
% \XeTeX\ provides for vertical typesetting simply with the ability to rotate
% the individual glyphs as a font is used for typesetting.
%
% \begin{aatexample}
%   \fontspec{Hiragino Mincho Pro}
%   共産主義者は
%
%   \fontspec[Renderer=AAT,Vertical=RotatedGlyphs]{Hiragino Mincho Pro}
%   \rotatebox{-90}{共産主義者は}% requires the graphicx package
% \end{aatexample}
%
% No actual provision is made for typesetting top-to-bottom
% languages; for an example of how to do this, see the vertical Chinese
% example provided in the \XeTeX\ documentation.
%
%
%
%
% \subsection{Diacritics}
% Diacritics refer to characters that include extra marks that usually
% indicate pronunciation; \eg, accented letters. You may either choose
% to \opt{Show}, \opt{Hide} or \opt{Decompose} them in \AAT\ fonts.
%
% Some fonts include |O/| \etc\ as diacritics for writing \O. You'll
% want to turn this feature off (imagine typing |hello/goodbye| and
% getting `hell\o goodbye' instead!) by decomposing the two characters
% in the diacritic into the ones you actually
% want. I would recommend using
% the proper \TeX\ input conventions for obtaining such characters
% instead.
%
% The \opt{Hide} option is for Arabic-like fonts which may be
% displayed either with or without vowel markings.
%
%
% \subsection{Annotation}
% Various Asian fonts are equipped with a more extensive range of
% numbers and numerals in different forms. These are accessed through
% the \feat{Annotation} feature with the following options: \opt{Off},
% \opt{Box}, \opt{RoundedBox}, \opt{Circle}, \opt{BlackCircle},
% \opt{Parenthesis}, \opt{Period}, \opt{RomanNumerals}, \opt{Diamond},
% \opt{BlackSquare}, \opt{BlackRoundSquare}, and \opt{DoubleCircle}.
% \begin{aatexample}
%   \fontspec{Hei Regular}
%    1 2 3 4 5 6 7 8 9                         \\
%   \fontspec[Annotation=Circle]{Hei Regular}
%    1 2 3 4 5 6 7 8 9                         \\
%   \fontspec[Annotation=Parenthesis]{Hei Regular}
%    1 2 3 4 5 6 7 8 9                         \\
%   \fontspec[Annotation=Period]{Hei Regular}
%    1 2 3 4 5 6 7 8 9
% \end{aatexample}
%
% \section{\AAT\ \& Multiple Master font axes} \label{sec:mm}
%
% Multiple Master and \AAT\ font specifications both provide continuous
% variation along font parameters. For example, they don't have just
% regular and bold weights, they can have any bold weight you like between
% the two extremes.
%
% \opt{Weight}, \opt{Width}, and \opt{OpticalSize} are supported by this
% package. Skia, which is distributed with
% Mac~OS~X, has two of these variable parameters, allowing for a
% demonstration:
% \begin{aatexample}
%   \fontspec[Weight=0.5,Width=3]{Skia}
%    Really light and extended Skia         \\
%   \fontspec[Weight=2,Width=0.5]{Skia}
%    Really fat and condensed Skia
% \end{aatexample}
% Variations along a multiple master font's optical size axis has been
% shown previously in \vref{sec:opticalsize}.
%
%
% \clearpage
% \part{Programming interface}
%
% This is the beginning of some work to provide some hooks that use
% \pkg{fontspec} for various macro programming purposes.
%
%
% \section{Defining new features} \label{sec:newfeatures}
% This package cannot hope to contain every possible font
% feature. Three commands are provided for selecting font features
% that are not provided for out of the box. If you are using
% them a lot, chances are I've left something out, so please let me
% know.
%
% \DescribeMacro{\newAATfeature}
% New \AAT\ features may be created with this command:\par
% {\centering\cmd\newAATfeature\marg{feature}\marg{option}\marg{feature code}\marg{selector code}\par}\noindent
% Use the \XeTeX\ file \path{AAT-info.tex} to obtain the code numbers. For example:
% \begin{aatexample}
%   \newAATfeature{Alternate}{HoeflerSwash}{17}{1}
%   \fontspec[Alternate=HoeflerSwash]{Hoefler Text Italic}
%    This is XeTeX by Jonathan Kew.
% \end{aatexample}
% This command replaces \cmd\newfeaturecode, which is provided
% for backwards compatibility via \texttt{fontspec.cfg}.
%
% \DescribeMacro{\newICUfeature}
% \DescribeMacro{\newopentypefeature}
% New OpenType features may be created with this command:\par
% {\centering\cmd\newICUfeature\marg{feature}\marg{option}\marg{feature tag}\par}
% The synonym \cs{newopentypefeature} is provided for \LuaTeX\ users.
% In the following example, the Moldavian language (see \vref{sec:ot}) must be activated to achieve the effect shown.
% \setexsize\Large
% \begingroup
% \begin{opentypeexample}
%   \newICUfeature{Style}{NoLocalForms}{-locl}
%   \fontspec[Language=Moldavian]{FPL Neu}
%   Ş ş Ţ ţ  \\
%   \addfontfeature{Style=NoLocalForms}
%   Ş ş Ţ ţ
% \end{opentypeexample}
% \endgroup
%
% \DescribeMacro{\newfontfeature}
% In case the above commands do not accommodate the desired font feature
% (perhaps a new \XeTeX\ feature that \pkg{fontspec} hasn't been updated
% to support), a command is provided to pass arbitrary input into the
% font selection string:\par
% {\centering\cmd{\newfontfeature}\marg{name}\marg{input string}\par}
%
% For example, Zapfino
% contains the feature `Avoid d-collisions'. To access it
% with this package, you could do the following:
% \begin{aatexample}
%   \newfontfeature{AvoidD}{Special=Avoid d-collisions}
%   \newfontfeature{NoAvoidD}{Special=!Avoid d-collisions}
%   \fontspec[AvoidD,Variant=1]{Zapfino}
%    sockdolager rubdown               \\
%   \fontspec[NoAvoidD,Variant=1]{Zapfino}
%    sockdolager rubdown
% \end{aatexample}
%
% The advantage to using the \cmd\newAATfeature\ and \cmd\newICUfeature\
% commands is that they check if the selected font actually contains the font
% feature. By contrast, \cmd\newfontfeature\ will not give a warning
% for improper input.
%
% \section{Going behind \pkg{fontspec}'s back}
% Expert users may wish not to use \pkg{fontspec}'s feature handling at all,
% while still taking advantage of its \LaTeX\ font selection conveniences. The
% \feat{RawFeature} font feature allows literal \XeTeX\ font feature selection
% when you happen to have the OpenType feature tag memorised.
% \begin{example}
%   \fontspec[RawFeature=+smcp]{FPL Neu}
%   FPL Neu small caps
% \end{example}
% Multiple features can either be included in a single declaration:\par
% {\centering|[RawFeature=+smcp;+onum]|\par}
% \noindent or with multiple declarations:\par
% {\centering|[RawFeature=+smcp, RawFeature=+onum]|\par}
%
% \section{Renaming existing features \& options}
% \label{sec:aliasfontfeature}
%
% \DescribeMacro{\aliasfontfeature}
% If you don't like the name of a particular font feature,
% it may be aliased to another with the
% \cs{aliasfontfeature}\marg{existing name}\marg{new name} command:
% \begin{aatexample}
%   \aliasfontfeature{ItalicFeatures}{IF}
%   \fontspec[IF = {Alternate=1}]{Hoefler Text}
%   Roman Letters \itshape And Swash
% \end{aatexample}
%
% Spaces in feature (and option names, see below) \emph{are} allowed. (You may have
% noticed this already in the lists of OpenType scripts and languages).
%
% \DescribeMacro{\aliasfontfeatureoption}
% If you wish to change the name of a font feature option,
% it can be aliased to another with the command
% \cs{aliasfontfeatureoption}\marg{font feature}\marg{existing name}\marg{new name}:
% \begin{opentypeexample}
%   \aliasfontfeature{VerticalPosition}{Vert Pos}
%   \aliasfontfeatureoption{VerticalPosition}{ScientificInferior}{Sci Inf}
%   \fontspec[Vert Pos=Sci Inf]{Warnock Pro}
%    Scientific Inferior: 12345
% \end{opentypeexample}
% This example demonstrates an important point: when aliasing the feature
% options, the \emph{original} feature name must be used when declaring
% to which feature the option belongs.
%
% Only feature options that exist as sets of fixed strings may be altered in
% this way. That is, \opt{Proportional} can be aliased to \opt{Prop} in the
% \feat{Letters} feature, but \opt{550099BB} cannot be substituted for \opt{Purple}
% in a \feat{Color} specification. For this type of thing, the \cmd\newfontfeature\
% command should be used to declare a new, \eg, \feat{PurpleColor} feature:
% \begin{Verbatim}
%   \newfontfeature{PurpleColor}{color=550099BB}
% \end{Verbatim}
%
% \section{Programming details}
%
% In some cases, it is useful to know what the \LaTeX\ font family
% of a specific \pkg{fontspec} font is. After a \cmd\fontspec-like
% command, this is stored inside the \cmd\zf@family\ macro.
% Otherwise, \LaTeX's own \cmd\f@family\ macro can be useful here,
% too.
% The raw \TeX\ font that is defined is stored temporarily
% in \cmd{\zf@basefont}.
%
% The following commands in \pkg{expl3} syntax may be used
% for writing codes that interface with fontspec-loaded fonts.
% All of the following conditionals also exist with |T| and |F|
% suffices as well as |TF|.
%
% \begin{macro}{\fontspec_if_fontspec_font:TF}
% Test whether the currently selected font has been loaded by fontspec.
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_aat_feature:nnTF}
% Test whether the currently selected font contains the \AAT\
% feature (|#1|,|#2|).
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_opentype:TF}
% Test whether the currently selected font is an OpenType font.
% Always true for LuaTeX fonts.
% \end{macro}
%
% \begin{macro}{\fontspec_if_feature:nTF}
% Test whether the currently selected font contains the raw OpenType
% feature |#1|. E.g.: |\fontspec_if_feature:nTF {pnum} {True} {False}|.
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
% \end{macro}
%
% \begin{macro}{\fontspec_if_feature:nnnTF}
% Test whether the currently selected font with raw OpenType script tag |#1| and raw OpenType language tag |#2| contains the raw OpenType feature tag |#3|. E.g.: |\fontspec_if_feature:nTF {latn} {ROM} {pnum} {True} {False}|.
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
% \end{macro}
%
% \begin{macro}{\fontspec_if_script:nTF}
% Returns whether the currently selected font contains the raw OpenType
% script |#1|. E.g.: |\fontspec_if_script:nTF {latn} {True} {False}|.
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
% \end{macro}
%
% \begin{macro}{\fontspec_if_language:nTF}
% Test whether the currently selected font contains the raw OpenType
% feature |#1|. E.g.: |\fontspec_if_feature:nTF {pnum} {True} {False}|.
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
% \end{macro}
%
% \begin{macro}{\fontspec_if_language:nnTF}
% Test whether the currently selected font contains the raw OpenType
% feature |#2| in script |#1|. E.g.: |\fontspec_if_feature:nTF {latn} {pnum} {True} {False}|.
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_current_script:nTF}
% Test whether the currently loaded font is using the specified raw
% OpenType script tag |#1|.
% \end{macro}
%
% \begin{macro}{\fontspec_if_current_language:nTF}
% Test whether the currently loaded font is using the specified raw
% OpenType language tag |#1|.
% \end{macro}
%
%  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %
% \clearpage
% \part{The patching/improvement of \LaTeXe\ and other packages}
% \label{sec:patching}
%
% Derived originally from xltxtra, this package contains patches to various
% \LaTeX\ components and third-party packages to improve the default
% behaviour.
%
% \section{Inner emphasis}
% \label{sec:emph}
%
% \pkg{fixltx2e}'s method for checking for ``inner'' emphasis is a little fragile in \XeTeX, because
% font slant information might be missing from the font. Therefore, we use \LaTeX's NFSS
% information, which is more likely to be correct.
%
% \section{Unicode footnote symbols}
% By default \LaTeX\ defines symbolic footnote characters in terms of commands 
% that don't resolve well; better results can be achieved by using specific unicode characters or proper LICRs with the \pkg{xunicode} package.
%
% This problem has been solved by loading the 
% \pkg{fixltx2e} and \pkg{xunicode} packages in \pkg{xltxtra}.
%
% \section{Verbatim}
% \label{sec:verb}
%
% Many verbatim mechanisms assume the existence of a `visible space' character that exists in the \textsc{ascii} space slot of the typewriter font. This character is known in unicode as \unichar{2434}{box open}, which looks like this: `\verb*| |'.
%
% When a unicode typewriter font is used, \LaTeX\ no longer prints visible spaces for the |verbatim*| environment and |\verb*| command. \pkg{xltxtra} fixes this problem by using the correct unicode glyph, and patches the following packages to do the same:
% \pkg{listings}, \pkg{fancyvrb}, \pkg{moreverb}, and \pkg{verbatim}.
%
% In the case that the typewriter font does not contain `\verb*| |', the Latin Modern Mono font is used as a fallback. 
%
% \section{Discrectionary hyphenation: \cmd\-}
% \label{sec:hyphen}
%
% \LaTeX\ defines the macro \cmd\-\ to insert discretionary hyphenation points.
% However, it is hard-coded in \LaTeX\ to use the hyphen |-| character. Since \pkg{fontspec}
% makes it easy to change the hyphenation character on a per font basis, it would
% be nice if \cmd\-\ adjusted automatically — and now it does.
%
% \StopEventually{}
%
% \clearpage
% \part{fontspec.sty}
%
% \section{Implementation}
% Herein lie the implementation details of this package. Welcome!
% It was my first.
%
% For some reason, I decided to prefix all the package internal
% command names and variables with |zf|. I don't know why I chose
% those letters, but I guess I just liked the look/feel of them
% together at the time. (Possibly inspired by Hermann \emph{Z}ap\emph{f}.)
%
% \iffalse
%<*fontspec>
% \fi
%    \begin{macrocode}
\RequirePackage{expl3,xparse}
\ExplSyntaxOn
%    \end{macrocode}
%
%    \begin{macrocode}
\msg_new:nnn {fontspec} {not-pdftex}
{
  Requires XeTeX or LuaTeX to function!
}
\xetex_if_engine:F {
  \luatex_if_engine:TF {
    \RequirePackage{luatextra}[2010/05/10]
    \luatexRequireModule{fontspec}
  }{
    \msg_error:nn {fontspec} {not-pdftex}
  }
}
%    \end{macrocode}
%
% \begin{macro}{\xetex_or_luatex:nn}
% Use |#1| if \XeTeX\ or |#2| if \LuaTeX.
%    \begin{macrocode}
\xetex_if_engine:TF
  { \cs_new_eq:NN \xetex_or_luatex:nn \use_i:nn }
  { \luatex_if_engine:T
    { \cs_new_eq:NN \xetex_or_luatex:nn \use_ii:nn }
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\xetex_or_luatex:nnn}
% Use |#1| and (|{#2}| if \XeTeX) or (|{#3}| if \LuaTeX).
%    \begin{macrocode}
\xetex_if_engine:TF
  { \cs_new:Npn \xetex_or_luatex:nnn #1#2#3 {#1{#2}} }
  {
    \luatex_if_engine:T
     { \cs_new:Npn \xetex_or_luatex:nnn #1#2#3 {#1{#3}} }
  }
%    \end{macrocode}
% \end{macro}
%
% \subsection{Bits and pieces}
% \paragraph{Conditionals}
%    \begin{macrocode}
\newif\ifzf@firsttime
\newif\ifzf@nobf
\newif\ifzf@noit
\newif\ifzf@nosc
\newif\ifzf@tfm
\newif\ifzf@atsui
\newif\ifzf@icu
\newif\ifzf@mm
\newif\ifzf@graphite
%    \end{macrocode}
% For dealing with legacy maths
%    \begin{macrocode}
\newif\ifzf@math@euler
\newif\ifzf@math@lucida
\newif\ifzf@package@euler@loaded
%    \end{macrocode}
% For package options:
%    \begin{macrocode}
\newif\if@zf@configfile
\newif\if@zf@math
%    \end{macrocode}
% \paragraph{Counters}
%    \begin{macrocode}
\newcount\c@zf@newff
\newcount\c@zf@index
\newcount\c@zf@script
\newcount\c@zf@language
\int_new:N \l_fontspec_strnum_int
%    \end{macrocode}
% Temporary definition until expl3 has been updated to include this:
%    \begin{macrocode}
\cs_set:Npn \use:x #1 { \edef\@tempa{#1}\@tempa }
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_new:Npn \fontspec_setkeys:xx #1#2
 {
  \use:x { \exp_not:N \setkeys*[zf]{#1}{#2} }
 }
\cs_new:Npn \fontspec_setkeys:xxx #1#2#3
 {
  \use:x { \exp_not:N \setkeys*[zf@#1]{#2}{#3} }
 }
%    \end{macrocode}
%
% \subsection{Error/warning messages}
%
% Shorthands for messages:
%    \begin{macrocode}
\cs_new:Npn \fontspec_error:n     { \msg_error:nn     {fontspec} }
\cs_new:Npn \fontspec_error:nx    { \msg_error:nnx    {fontspec} }
\cs_new:Npn \fontspec_warning:n   { \msg_warning:nn   {fontspec} }
\cs_new:Npn \fontspec_warning:nx  { \msg_warning:nnx  {fontspec} }
\cs_new:Npn \fontspec_warning:nxx { \msg_warning:nnxx {fontspec} }
\cs_new:Npn \fontspec_info:n      { \msg_info:nn      {fontspec} }
\cs_new:Npn \fontspec_info:nx     { \msg_info:nnx     {fontspec} }
\cs_new:Npn \fontspec_info:nxx    { \msg_info:nnxx    {fontspec} }
\cs_new:Npn \fontspec_trace:n     { \msg_trace:nn     {fontspec} }
%    \end{macrocode}
%
% Errors:
%    \begin{macrocode}
\msg_new:nnn {fontspec} {no-size-info}
{
  Size~ information~ must~ be~ supplied.\\
  For~ example,~ SizeFeatures={Size={8-12},...}.
}
\msg_new:nnnn {fontspec} {rename-feature-not-exist}
{
  The~ feature~ #1~ doesn't~ appear~ to~ be~ defined.
}
{
  It~ looks~ like~ you're~ trying~ to~ rename~ a~ feature~ that~ doesn't~ exist.
}
\msg_new:nnn {fontspec} {no-glyph}
{
  '\zf@fontname'~ doesn't~ appear~ to~ have~ the~ glyph~ corresponding~ to~ '#1'.
}
\msg_new:nnnn {fontspec} {unknown-options}
{
  The~ following~ font~ options~ are~ not~ recognised:\\
  \space\space\space\space #1
}
{
  There~ is~ probably~ a~ typo~ in~ the~ font~ feature~ selection.
}
\msg_new:nnnn {fontspec} {euler-too-late}
{
  The~ euler~ package~ must~ be~ loaded~ BEFORE~ fontspec.
}
{
  fontspec~ only~ overwrites~ euler's~ attempt~ to\\
  define~ the~ maths~ text~ fonts~ if~ fontspec~ is\\
  loaded~ after~ euler.~ Type~ <return>~ to~ proceed\\
  with~ incorrect~ \string\mathit,~ \string\mathbf,~ etc.
}

%    \end{macrocode}
% Warnings:
%    \begin{macrocode}
\msg_new:nnn {fontspec} {addfontfeatures-ignored}
{
  \string\addfontfeature (s)~ ignored;\\
  it~ cannot~ be~ used~ with~ a~ font~ that~ wasn't~ selected~ by~ fontspec.
}
\msg_new:nnn {fontspec} {feature-option-overwrite}
{
  Option~ '#2'~ of~ font~ feature~ '#1'~ overwritten.
}
\msg_new:nnn {fontspec} {script-not-exist}
{
  Font~ '\zf@fontname'~ does~ not~ contain~ script~ '#1'.
}
\msg_new:nnn {fontspec} {aat-feature-not-exist}
{
  '\XKV@tfam=\XKV@tkey'~ feature~ not~ supported\\
  for~ AAT~ font~ '\zf@fontname'.
}
\msg_new:nnn {fontspec} {aat-feature-not-exist-in-font}
{
  AAT~ feature~ '\XKV@tfam=\XKV@tkey'~ (#1)~ not~ available\\
  in~ font~ '\zf@fontname'.
}
\msg_new:nnn {fontspec} {icu-feature-not-exist}
{
  '\XKV@tfam=\XKV@tkey'~ feature~ not~ supported\\
  for~ ICU~ font~ '\zf@fontname'
}
\msg_new:nnn {fontspec} {icu-feature-not-exist-in-font}
{
  OpenType~ feature~ '\XKV@tfam=\XKV@tkey'~ (#1)~ not~ available\\
  for~ font~ '\zf@fontname', \\
  with~ script~ '\l_fontspec_script_name_tl',~ and~ language~ '\l_fontspec_lang_name_tl'.
}
\msg_new:nnn {fontspec} {no-opticals}
{
  '\zf@fontname'~ doesn't~ appear~ to~ have~ an~ Optical~ Size~ axis.
}
\msg_new:nnn {fontspec} {language-not-exist}
{
  Language~ '#1'~ not~ available\\
  for~ font~ '\zf@fontname'\\
  with~ script~ '\l_fontspec_script_name_tl'.
}
\msg_new:nnn {fontspec} {only-xetex-feature}
{
  Ignored~ XeTeX~ only~ feature:~ '#1'.
}
\msg_new:nnn {fontspec} {only-luatex-feature}
{
  Ignored~ LuaTeX~ only~ feature:~ '#1'.
}
\msg_new:nnn {fontspec} {no-mapping}
{
  Input~ mapping~ not~ (yet?)~ supported~ in~ LuaTeX.
}
\msg_new:nnn {fontspec} {no-mapping-ligtex}
{
  Input~ mapping~ not~ (yet?)~ supported~ in~ LuaTeX.\\
  Use~ "Ligatures=TeX"~ instead~ of~ "Mapping=tex-text".
}
\msg_new:nnn {fontspec} {cm-default-obsolete}
{
  The~ "cm-default"~ package~ option~ is~ obsolete.
}
%    \end{macrocode}
% Info messages:
%    \begin{macrocode}
\msg_new:nnn {fontspec} {defining-font}
{
  Defining~ font~ family~ for~ '#2'~ with~ options~ [\zf@default@options #1].
}
\msg_new:nnn {fontspec} {no-font-shape}
{
  Could~ not~ resolve~ font~ #1~ (it~ probably~ doesn't~ exist).
}
\msg_new:nnn {fontspec} {set-scale}
{
  \zf@fontname\space scale ~=~ \l_fontspec_scale_tl.
}
\msg_new:nnn {fontspec} {setup-math}
{
  Adjusting~ the~ maths~ setup~ (use~ [no-math]~ to~ avoid~ this).
}
%    \end{macrocode}
%
% \subsection{Option processing}
%
%    \begin{macrocode}
\DeclareOption{cm-default}{
  \fontspec_warning:n {cm-default-obsolete}
}
\DeclareOption{math}{\@zf@mathtrue}
\DeclareOption{no-math}{\@zf@mathfalse}
\DeclareOption{config}{\@zf@configfiletrue}
\DeclareOption{no-config}{\@zf@configfilefalse}
\DeclareOption{quiet}{
  \msg_redirect_module:nnn { fontspec } { warning } { info }
  \msg_redirect_module:nnn { fontspec } { info } { none }
}
\DeclareOption{silent}{
  \msg_redirect_module:nnn { fontspec } { warning } { none }
  \msg_redirect_module:nnn { fontspec } { info } { none }
}
\ExecuteOptions{config,math}
\ProcessOptions*
%    \end{macrocode}
%
% \subsection{Packages}
% We require the \pkg{calc} package for autoscaling and a recent version of the
% \pkg{xkeyval} package for option processing.
%    \begin{macrocode}
\RequirePackage{calc}
\RequirePackage{xkeyval}[2005/05/07]
%    \end{macrocode}
%
% New for \LuaTeX, we load a new package called `\pkg{fontspec-patches}'
% designed to incorporate the hidden but useful parts of the old \pkg{xltxtra}
% package.
%    \begin{macrocode}
\luatex_if_engine:T { \RequirePackage{fontspec-patches} }
%    \end{macrocode}
%
%
% \subsection{Encodings}
% Frank Mittelbach has recommended using the `\texttt{EU}$x$' family of font encodings
% to experiment with unicode.
% Now that \XeTeX\ can find fonts in the |texmf| tree, the Latin Modern OpenType fonts
% can be used as the defaults. See the |euenc| collection of files for how this is implemented.
%    \begin{macrocode}
\xetex_or_luatex:nnn {\tl_set:Nn \zf@enc} {EU1} {EU2}
\tl_set:Nn \rmdefault {lmr}
\tl_set:Nn \sfdefault {lmss}
\tl_set:Nn \ttdefault {lmtt}
\RequirePackage[\zf@enc]{fontenc}
\tl_set_eq:NN \UTFencname \zf@enc % for xunicode
%    \end{macrocode}
% Dealing with a couple of the problems introduced by \pkg{babel}:
%    \begin{macrocode}
\tl_set_eq:NN \cyrillicencoding \zf@enc
\tl_set_eq:NN \latinencoding    \zf@enc
\g@addto@macro \document {
  \tl_set_eq:NN \cyrillicencoding \zf@enc
  \tl_set_eq:NN \latinencoding    \zf@enc
}
%    \end{macrocode}
% That latin encoding definition is repeated to suppress font warnings.
% Something to do with \cmd\select@language\ ending up in the \texttt{.aux}
% file which is read at the beginning of the document.
%
%
% \subsection{User commands}\label{sec:codeuser}
% This section contains the definitions of the commands detailed in
% the user documentation.  Only the `top level' definitions of the
% commands are contained herein; they all use or define macros which
% are defined or used later on in \vref{sec:codeinternal}.
%
% \subsubsection{Font selection}
% \begin{macro}{\fontspec}
%   This is the main command of the package that
%   selects fonts with various features. It takes two arguments: the
%   \MacOSX\ font name and the optional requested features of that
%   font. It simply runs \cs{zf@fontspec}, which takes the same
%   arguments as the top level macro and puts the new-fangled font
%   family name into the global \cmd{\zf@family}. Then this new font
%   family is selected.
%    \begin{macrocode}
\DeclareDocumentCommand \fontspec { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \fontfamily\zf@family\selectfont
  \ignorespaces
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\setmainfont}
% \begin{macro}{\setsansfont}
% \begin{macro}{\setmonofont}
%     The following three macros perform equivalent operations setting
%     the default font (using \cs{let} rather than \cs{renewcommand}
%     because \cs{zf@family} will change in the future) for a
%     particular family: `roman', sans serif, or typewriter
%     (monospaced). I end them with |\normalfont| so that if they're
%     used in the document, the change registers immediately.
%    \begin{macrocode}
\DeclareDocumentCommand \setmainfont { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \tl_set_eq:NN \rmdefault \zf@family
  \normalfont
}
\DeclareDocumentCommand \setsansfont { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \tl_set_eq:NN \sfdefault \zf@family
  \normalfont
}
\DeclareDocumentCommand \setmonofont { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \tl_set_eq:NN \ttdefault \zf@family
  \normalfont
}
%    \end{macrocode}
% \end{macro} \end{macro} \end{macro}
%
%
% \begin{macro}{\setromanfont}
% This is the old name for \cs{setmainfont}, retained
% for backwards compatibility.
%    \begin{macrocode}
\cs_set_eq:NN \setromanfont \setmainfont
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\setmathrm}
% \begin{macro}{\setmathsf}
% \begin{macro}{\setboldmathrm}
% \begin{macro}{\setmathtt}
% These commands are analogous to \cmd\setromanfont\ and others,
% but for selecting the font used for \cmd\mathrm, \etc. They
% can only be used in the preamble of the
% document. \cmd\setboldmathrm\ is used for specifying which
% fonts should be used in \cmd\boldmath.
%    \begin{macrocode}
\DeclareDocumentCommand \setmathrm { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \let\zf@rmmaths\zf@family
}
\DeclareDocumentCommand \setboldmathrm { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \let\zf@rmboldmaths\zf@family
}
\DeclareDocumentCommand \setmathsf { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \let\zf@sfmaths\zf@family
}
\DeclareDocumentCommand \setmathtt { O{} m } {
  \fontspec_select:nn{#1}{#2}
  \let\zf@ttmaths\zf@family
}
\@onlypreamble\setmathrm
\@onlypreamble\setboldmathrm
\@onlypreamble\setmathsf
\@onlypreamble\setmathtt
%    \end{macrocode}
% If the commands above are not executed, then \cmd\rmdefault\ (\etc)
% will be used.
%    \begin{macrocode}
\def\zf@rmmaths{\rmdefault}
\def\zf@sfmaths{\sfdefault}
\def\zf@ttmaths{\ttdefault}
%    \end{macrocode}
% \end{macro} \end{macro} \end{macro}
% \end{macro}
%
% \begin{macro}{\newfontfamily}
% \begin{macro}{\newfontface}
%   This macro takes the arguments of \cs{fontspec} with a prepended
%   \meta{instance cmd} (code for middle optional argument generated
%   by \name{Scott Pakin}'s \textsf{newcommand.py}). This command is used
%   when a specific font instance needs to be referred to repetitively
%   (\eg, in a section heading) since continuously calling
%   \cs{zf@fontspec} is inefficient because it must parse the
%   option arguments every time.
%
%   \cs{zf@fontspec} defines a font family and saves its name in
%   \cs{zf@family}. This family is then used in a typical NFSS \cmd\fontfamily\
%   declaration, saved in the macro name specified.
%    \begin{macrocode}
\DeclareDocumentCommand \newfontfamily { m O{} m } {
  \fontspec_select:nn{#2}{#3}
  \use:x {
    \exp_not:N \DeclareRobustCommand \exp_not:N #1 {
      \exp_not:N \fontfamily {\zf@family} \exp_not:N \selectfont
    }
  }
}
%    \end{macrocode}
% \cmd\newfontface\ uses an undocumented feature of the \feat{BoldFont}
% feature; if its argument is empty (\ie, |BoldFont={}|), then no bold
% font is searched for.
%    \begin{macrocode}
\DeclareDocumentCommand \newfontface { m O{} m } {
  \newfontfamily #1 [ BoldFont={},ItalicFont={},SmallCapsFont={},#2 ] {#3}
}
%    \end{macrocode}
% \end{macro} \end{macro}
%
% \subsubsection{Font feature selection}
%
% \begin{macro}{\defaultfontfeatures}
%   This macro takes one argument that consists of all of feature
%   options that will be applied by default to all subsequent
%   \cs{fontspec}, et al., commands. It stores its value in
%   \cs{zf@default@options} (initialised empty), which is
%   concatenated with the individual macro choices in the
%   \cs{zf@get@feature@requests} macro.
%    \begin{macrocode}
\DeclareDocumentCommand \defaultfontfeatures {m} {\def\zf@default@options{#1,}}
\let\zf@default@options\@empty
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\addfontfeatures}
%   In order to be able to extend the feature selection of
%   a given font, two things need to be known: the currently selected
%   features, and the currently selected font. Every time a font
%   family is created, this information is saved inside a control
%   sequence with the name of the font family itself.
%
%   This macro extracts this information, then appends the requested
%   font features to add to the already existing ones, and calls the
%   font again with the top level \cs{fontspec} command.
%
%   The default options are \emph{not} applied (which is why
%   \cs{zf@default@options} is emptied inside the group; this is allowed
%   as \cmd\zf@family\ is globally defined in \cmd\fontspec_select:nn), so this
%   means that the only added features to the font are strictly those
%   specified by this command.
%
%   \cs{addfontfeature} is defined as an alias, as I found that I
%   often typed this instead when adding only a single font feature.
%    \begin{macrocode}
\DeclareDocumentCommand \addfontfeatures {m} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \begingroup
      \let\zf@default@options\@empty
      \use:x {
        \exp_not:N\fontspec_select:nn
          {\csname zf@family@options\f@family\endcsname,#1}
          {\csname zf@family@fontname\f@family\endcsname}
      }
    \endgroup
    \fontfamily\zf@family\selectfont
  \else
    \fontspec_warning:n {addfontfeatures-ignored}
  \fi
  \ignorespaces
}
\let\addfontfeature\addfontfeatures
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Defining new font features}
%
% \begin{macro}{\newfontfeature}
%   \cs{newfontfeature} takes two arguments: the name of the feature
%   tag by which to reference it, and the string that is used to
%   select the font feature. It uses a counter to keep track of the
%   number of new features introduced; every time a new feature is
%   defined, a control sequence is defined made up of the
%   concatenation of |+zf-| and the new feature tag. This long-winded
%   control sequence is then called upon to update the font family
%   string when a new instance is requested.
%    \begin{macrocode}
\DeclareDocumentCommand \newfontfeature {mm} {
  \stepcounter{zf@newff}
  \cs_set:cpx{+zf-#1}{+zf-\the\c@zf@newff}
  \define@key[zf]{options}{#1}[]{
    \zf@update@family{\csname+zf-#1\endcsname}
    \zf@update@ff{#2}
  }
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\newAATfeature}
% This command assigns a new AAT feature by its code (|#2|,|#3|) to a new name (|#1|).
% Better than \cmd\newfontfeature\ because it checks if the feature exists in the
% font it's being used for.
%    \begin{macrocode}
\DeclareDocumentCommand \newAATfeature {mmmm} {
  \unless\ifcsname zf@options@#1\endcsname
    \zf@define@font@feature{#1}
  \fi
  \key@ifundefined[zf]{#1}{#2}{}{
    \fontspec_warning:nxx {feature-option-overwrite}{#1}{#2}
  }
  \zf@define@feature@option{#1}{#2}{#3}{#4}{}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\newICUfeature}
% \begin{macro}{\newopentypefeature}
% This command assigns a new OpenType feature by its abbreviation (|#2|) to a new name (|#1|).
% Better than \cmd\newfontfeature\ because it checks if the feature exists in the
% font it's being used for.
%    \begin{macrocode}
\DeclareDocumentCommand \newICUfeature {mmm} {
  \unless\ifcsname zf@options@#1\endcsname
    \zf@define@font@feature{#1}
  \fi
  \key@ifundefined[zf]{#1}{#2}{}{
    \fontspec_warning:nxx {feature-option-overwrite}{#1}{#2}
  }
  \zf@define@feature@option{#1}{#2}{}{}{#3}
}
\cs_set_eq:NN \newopentypefeature \newICUfeature
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \begin{macro}{\aliasfontfeature}
% \begin{macro}{\aliasfontfeatureoption}
% User commands for renaming font features and font feature options.
% Provided I've been consistent, they should work for everything.
%    \begin{macrocode}
\DeclareDocumentCommand \aliasfontfeature {mm} {\multi@alias@key{#1}{#2}}
\DeclareDocumentCommand \aliasfontfeatureoption {mmm} {
  \keyval@alias@key[zf@feat]{#1}{#2}{#3}
}
%    \end{macrocode}
% \end{macro} \end{macro}
%
% \begin{macro}{\newfontscript}
% Mostly used internally, but also possibly useful for users, to define new OpenType
% `scripts', mapping logical names to OpenType script tags.
% Iterates though the scripts in the selected font to check that it's a valid
% feature choice, and then prepends the (\XeTeX) \cmd\font\ feature string with the appropriate
% script selection tag.
%    \begin{macrocode}
\DeclareDocumentCommand \newfontscript {mm}
{
  \fontspec_new_script:nn {#1} {#2}
  \fontspec_new_script:nn {#2} {#2}
}
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_new:Npn \fontspec_new_script:nn #1#2
{
  \define@key[zf@feat]{Script}{#1}[]{
    \fontspec_check_script:nTF {#2} {
      \zf@update@family{+script=#1}
      \tl_set:Nn \l_fontspec_script_tl {#2}
      \c@zf@script=\l_fontspec_strnum_int\relax
    }{
      \fontspec_warning:nx {script-not-exist} {#1}
    }
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\newfontlanguage}
% Mostly used internally, but also possibly useful for users, to define new OpenType
% `languages', mapping logical names to OpenType language tags.
% Iterates though the languages in the selected font to check that it's a valid
% feature choice, and then prepends the (\XeTeX) \cmd\font\ feature string with the appropriate
% language selection tag.
%    \begin{macrocode}
\DeclareDocumentCommand \newfontlanguage {mm}
{
  \fontspec_new_lang:nn {#1} {#2}
  \fontspec_new_lang:nn {#2} {#2}
}
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_new:Npn \fontspec_new_lang:nn #1#2
{
  \define@key[zf@feat]{Lang}{#1}[]{
    \fontspec_check_lang:nTF {#2} {
      \zf@update@family{+lang=#1}
      \tl_set:Nn \l_fontspec_lang_tl {#2}
      \c@zf@language=\l_fontspec_strnum_int\relax
    }{
      \fontspec_warning:nx {language-not-exist} {#1}
    }
  }
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\DeclareFontsExtensions}
% \texttt{dfont} would never be uppercase, right?
%    \begin{macrocode}
\DeclareDocumentCommand \DeclareFontsExtensions {m}
{
  \tl_set:Nx \l_fontspec_extensions_clist { \zap@space #1~\@empty }
}
\DeclareFontsExtensions{.otf,.ttf,.OTF,.TTF,.ttc,.TTC,.dfont}
%    \end{macrocode}
% \end{macro}
%
% \subsection{Programmer's interface}
%
% These functions are not used directly by fontspec when defining fonts;
% they are designed to be used by other packages who wish to do font-related
% things on top of fontspec itself.
%
% Because I haven't fully explored how these functions will behave in
% practise, I am not giving them user-level names. As it becomes more clear
% which of these should be accessible by document writers, I'll open them up
% a little more.
%
% All functions are defined assuming that the font to be queried is
% currently selected as a fontspec font. (I.e., via \verb|\fontspec| or
% from a \verb|\newfontfamily| macro or from \verb|\setmainfont| and so on.) 
%
% \begin{macro}{\fontspec_if_fontspec_font:TF}
% Returns whether the currently selected font has been loaded by fontspec.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_fontspec_font: {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \prg_return_true:
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_aat_feature:nnTF}
% Conditional to test if the currently selected font contains the \AAT\
% feature (|#1|,|#2|).
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_aat_feature:nn {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\use:c{zf@family@fontdef\f@family}"~at~\f@size pt
    \ifzf@atsui
      \fontspec_make_AAT_feature_string:nn{#1}{#2}
      \ifx\@tempa\@empty
        \prg_return_false:
      \else
        \prg_return_true:
      \fi
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_opentype:TF}
% Returns whether the currently selected font is an OpenType font.
% Always true for LuaTeX fonts.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_opentype: {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \prg_return_true:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_feature:nTF}
% Returns whether the currently selected font contains the raw OpenType
% feature |#1|. E.g.: |\fontspec_if_feature:nTF {pnum} {True} {False}|
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_feature:n {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \int_set:Nn \c@zf@script
        {\use:c {g_fontspec_script_num_(\zf@family)_tl}}
      \int_set:Nn \c@zf@language
        {\use:c {g_fontspec_lang_num_(\zf@family)_tl}}
      \tl_set:Nv \l_fontspec_script_tl {g_fontspec_script_(\zf@family)_tl}
      \tl_set:Nv \l_fontspec_lang_tl   {g_fontspec_lang_(\zf@family)_tl}
      \fontspec_check_ot_feat:nTF {#1} \prg_return_true: \prg_return_false:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_feature:nnnTF}
% Returns whether the currently selected font with raw OpenType script tag |#1| and raw OpenType language tag |#2| contains the raw OpenType feature tag |#3|. E.g.: |\fontspec_if_feature:nTF {latn} {ROM} {pnum} {True} {False}|
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_feature:nnn {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \fontspec_iv_str_to_num:n{#1} \c@zf@script   = \l_fontspec_strnum_int \relax
      \fontspec_iv_str_to_num:n{#2} \c@zf@language = \l_fontspec_strnum_int \relax
      \fontspec_check_ot_feat:nTF {#3} \prg_return_true: \prg_return_false:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_script:nTF}
% Returns whether the currently selected font contains the raw OpenType
% script |#1|. E.g.: |\fontspec_if_script:nTF {latn} {True} {False}|
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_script:n {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \fontspec_check_script:nTF {#1} \prg_return_true: \prg_return_false:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_language:nTF}
% Returns whether the currently selected font contains the raw OpenType
% feature |#1|. E.g.: |\fontspec_if_feature:nTF {+pnum} {True} {False}|
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_language:n {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \tl_set:Nv \l_fontspec_script_tl {g_fontspec_script_(\zf@family)_tl}
      \int_set:Nn \c@zf@script
        {\use:c {g_fontspec_script_num_(\zf@family)_tl}}
      \fontspec_check_lang:nTF {#1} \prg_return_true: \prg_return_false:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_language:nnTF}
% Returns whether the currently selected font contains the raw OpenType
% feature |#2| in script |#1|. E.g.: |\fontspec_if_feature:nTF {+pnum} {True} {False}|
% Returns false if the font is not loaded by fontspec or is not an OpenType
% font.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_language:nn {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \tl_set:Nn \l_fontspec_script_tl {#1}
      \fontspec_iv_str_to_num:n{#1} \c@zf@script   = \l_fontspec_strnum_int \relax
      \fontspec_check_lang:nTF {#2} \prg_return_true: \prg_return_false:
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_current_script:nTF}
% Returns whether the currently loaded font is using the specified raw
% OpenType script tag |#1|.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_current_script:n {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \tl_if_eq:nvTF {#1} {g_fontspec_script_(\zf@family)_tl}
        {\prg_return_true:} {\prg_return_false:}
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_if_current_language:nTF}
% Returns whether the currently loaded font is using the specified raw
% OpenType language tag |#1|.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_current_language:n {TF,T,F} {
  \ifcsname zf@family@fontdef\f@family\endcsname
    \font\zf@basefont="\csname zf@family@fontdef\f@family\endcsname"~at~\f@size pt
    \fontspec_set_font_type:
    \ifzf@icu
      \tl_if_eq:nvTF {#1} {g_fontspec_lang_(\zf@family)_tl}
        {\prg_return_true:} {\prg_return_false:}
    \else
      \prg_return_false:
    \fi
  \else
    \prg_return_false:
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% Need this:
%    \begin{macrocode}
\cs_generate_variant:Nn \tl_if_eq:nnTF {nv}
%    \end{macrocode}
%
%
% \subsection{Internal macros}
% \label{sec:codeinternal}
%
% The macros from here in are used internally by all those defined above.
% They are not designed to remain consistent between versions.
%
% \begin{macro}{\fontspec_select:nn}
% This is the command that defines font families for use, the underlying
% procedure of all \cmd\fontspec-like commands. Given a
% list of font features (|#1|) for a requested font (|#2|, stored
% in \cs{zf@fontname} globally for the
% \cs{zf@make@aat@feature@string} macro), it will define an NFSS
% family for that font and put the family name into \cs{zf@family}.
%
% This macro does its processing inside a group, but it's a bit worthless coz
% there's all sorts of \cmd\global\ action going on. Pity. Anyway, lots of things
% are branched out for the pure reason of splitting
% the code up into logical chunks. Some of it is never even re-used, so it
% all might be a bit obfuscating. (\Eg, \cmd{\fontspec_init:} and \cmd{\fontspec_set_font_type:}.)
%
% First off, initialise some bits and pieces and run the |preparse| feature
% processing. This catches font features such as |Renderer| that can change
% the way subsequent features are processed. All font features that `slip through'
% this stage are saved in the \cmd\zf@font@feat\ macro for future processing.
%    \begin{macrocode}
\cs_set:Npn \fontspec_select:nn #1#2 {
  \begingroup
  \fontspec_init:
%    \end{macrocode}
% \cmd{\zf@fontname} is used as the generic name of the font being defined.
% \cmd{\zf@family@long} is the unique identifier of the font with all its
% features.
% \cmd{\zf@up} is the font specifically to be used as the upright font.
%    \begin{macrocode}
  \edef\zf@fontname{#2}
  \let\zf@family@long\zf@fontname
  \let\zf@up\zf@fontname
%    \end{macrocode}
% Detect if external fonts are to be used, possibly automatically, and
% parse fontspec features for bold/italic fonts and their features.
%    \begin{macrocode}
  \fontspec_if_detect_external:nT {#2}
   { \setkeys[zf]{preparse-external}{ExternalLocation} }
  \fontspec_setkeys:xx {preparse-external} {\zf@default@options #1}
%    \end{macrocode}
% When \cmd{\zf@fontname} is augmented with a prefix or whatever to create
% the name of the upright font (\cmd{\zf@up}), this latter is the new `general
% font name' to use.
%    \begin{macrocode}
  \let\zf@fontname\zf@up
  \fontspec_setkeys:xx {preparse} {\XKV@rm}
  \let\zf@font@feat\XKV@rm
%    \end{macrocode}
%    \begin{macrocode}
  \global\font\zf@basefont="\fontspec_fullname:n {\zf@up}"~at~\f@size pt
  \fontspec_set_font_type:
  \global\font\zf@basefont="\fontspec_fullname:n {\zf@up}"~at~\f@size pt
%    \end{macrocode}
% Now convert the remaining requested features to font definition
% strings. This is performed with \cs{zf@get@feature@requests}, in
% which \cs{setkeys} retrieves the requested font features and
% processes them. To build up the complex family name, it
% concatenates each font feature with the family name of the
% font. So since \cs{setkeys} is run more than once (since different
% font faces may have different feature names), we only want the
% complex family name to be built up once, hence the \cs{zf@firsttime}
% conditionals.
%    \begin{macrocode}
  \zf@firsttimetrue
    \ifzf@icu
      \fontspec_setkeys:xxx {feat} {Script} {\l_fontspec_script_name_tl}
      \fontspec_setkeys:xxx {feat} {Lang}   {\l_fontspec_lang_name_tl}
    \fi
    \fontspec_get_features:n{\zf@font@feat}
  \zf@firsttimefalse
%    \end{macrocode}
% Now we have a unique (in fact, too unique!) string that contains
% the family name and every option in abbreviated form. This is used
% with a counter to create a simple NFSS family name for the font we're
% selecting.
%
% The font name is fully expanded, in case it's defined in terms of macros, before having its spaces zapped.
%    \begin{macrocode}
  \unless\ifcsname zf@UID@\zf@family@long\endcsname
    \ifcsname c@zf@famc@#2\endcsname
      \expandafter\global\expandafter\advance
        \csname c@zf@famc@#2\endcsname\@ne
    \else
      \expandafter\global\expandafter\newcount
        \csname c@zf@famc@#2\endcsname
    \fi
    \edef\@tempa{#2~}
    \cs_gset:cpx{zf@UID@\zf@family@long}{
      \expandafter\zap@space\@tempa\@empty
      (\expandafter\the\csname c@zf@famc@#2\endcsname)
    }
  \fi
  \xdef\zf@family{\@nameuse{zf@UID@\zf@family@long}}
%    \end{macrocode}
%
% Now that we have the family name, we
% can check to see if the family has already been defined, and if not,
% do so. Once the family name is created, use it to create global
% macros to save the user
% string of the requested options and font name, primarily for use with
% \cs{addfontfeatures}.
%    \begin{macrocode}
  \unless\ifcsname zf@family@fontname\zf@family\endcsname
    \fontspec_info:nxx {defining-font} {#1} {#2}
    \tl_gset:cx {zf@family@fontname\zf@family} {#2}
    \tl_gset:cx {zf@family@options\zf@family} {\zf@default@options #1}
    \tl_gset:cx {zf@family@fontdef\zf@family} {
      \fontspec_fullname:n {\zf@fontname} : \l_fontspec_pre_feat_tl \l_fontspec_rawfeatures_sclist
    }
    \tl_gset:cx {g_fontspec_script_num_(\zf@family)_tl}
      { \int_use:N \c@zf@script   }
    \tl_gset:cx {g_fontspec_lang_num_(\zf@family)_tl}
      { \int_use:N \c@zf@language }
    \tl_gset_eq:cN {g_fontspec_script_(\zf@family)_tl} \l_fontspec_script_tl
    \tl_gset_eq:cN {g_fontspec_lang_(\zf@family)_tl}   \l_fontspec_lang_tl
%    \end{macrocode}
% Next the font family and its shapes are defined in the NFSS.
%
% All NFSS specifications take their default values, so if any of them
% are redefined, the shapes will be selected to fit in with the
% current state. For example, if \cmd\bfdefault\ is redefined to |b|, all
% bold shapes defined by this package will also be assigned to |b|.
%
% The macros \cs{zf@bf}, et al., are used to store the name of the
% custom bold, et al., font, if requested as user options. If they are
% empty, the default fonts are used.
%
% First we define the font family and define the normal shape: (any shape-specific
% features are appended to the generic font features requested in the last argument
% of \cmd\zf@make@font@shapes.)
%    \begin{macrocode}
    \DeclareFontFamily{\zf@enc}{\zf@family}{}
    \zf@make@font@shapes{\zf@fontname}
      {\mddefault}{\updefault}{\zf@font@feat\zf@up@feat}
%    \end{macrocode}
% And the different shapes are set accordingly.
%    \begin{macrocode}
    \fontspec_set_bold:
    \fontspec_set_italic:
    \fontspec_set_slanted:
    \fontspec_set_bold_italic:
    \fontspec_set_bold_slanted:
  \fi
  \endgroup
}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\fontspec_if_detect_external:nT}
% Check if either the fontname ends with a known font extension.
%    \begin{macrocode}
\prg_new_conditional:Nnn \fontspec_if_detect_external:n {T}
 {
  \clist_map_inline:Nn \l_fontspec_extensions_clist
   {
    \bool_set_false:N \l_tmpa_bool
    \tl_if_in:nnT {#1 <= end_of_string} {##1 <= end_of_string}
      { \bool_set_true:N \l_tmpa_bool \clist_map_break: }
   }
  \bool_if:NTF \l_tmpa_bool \prg_return_true: \prg_return_false:
 }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_fullname:n}
% Constructs the complete font name based on a common piece of info.
%    \begin{macrocode}
\cs_set:Npn \fontspec_fullname:n #1 {
  \fontspec_namewrap:n { #1 \l_fontspec_extension_tl }
  \l_fontspec_renderer_tl
  \l_fontspec_optical_size_tl
}
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\fontspec_set_bold:}
% Again, the extra bold options defined with
% \feat{BoldFeatures} are appended to the generic font features.
% Then, the bold font is defined either as the ATS
% default (\cs{zf@make@font@shapes}' optional argument is to check if
% there actually is one; if not, the bold NFSS series is left
% undefined) or with the font specified with the \feat{BoldFont} feature.
%    \begin{macrocode}
\cs_new:Npn \fontspec_set_bold: {
  \unless\ifzf@nobf
    \ifx\zf@bf\@empty
      \zf@make@font@shapes[\zf@fontname]{/B}
        {\bfdefault}{\updefault}{\zf@font@feat\zf@bf@feat}
    \else
      \zf@make@font@shapes{\zf@bf}
        {\bfdefault}{\updefault}{\zf@font@feat\zf@bf@feat}
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_set_italic:}
% And italic in the same way:
%    \begin{macrocode}
\cs_new:Npn \fontspec_set_italic: {
  \unless\ifzf@noit
    \ifx\zf@it\@empty
      \zf@make@font@shapes[\zf@fontname]{/I}
        {\mddefault}{\itdefault}{\zf@font@feat\zf@it@feat}
    \else
      \zf@make@font@shapes{\zf@it}
        {\mddefault}{\itdefault}{\zf@font@feat\zf@it@feat}
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_set_slanted:}
% And slanted but only if requested:
%    \begin{macrocode}
\cs_new:Npn \fontspec_set_slanted: {
  \ifx\zf@sl\@empty\else
    \zf@make@font@shapes{\zf@sl}
      {\mddefault}{\sldefault}{\zf@font@feat\zf@sl@feat}
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_set_bold_italic:}
% % If requested, the custom fonts take precedence when choosing the
% bold italic font. When both italic and bold fonts are requested and
% the bold italic font hasn't been explicitly specified (a rare
% occurance, presumably), the new bold font is used to define the new
% bold italic font.
%    \begin{macrocode}
\cs_new:Npn \fontspec_set_bold_italic: {
  \@tempswatrue
  \ifzf@nobf\@tempswafalse\fi
  \ifzf@noit\@tempswafalse\fi
  \if@tempswa
    \ifx\zf@bfit\@empty
      \ifx\zf@bf\@empty
        \ifx\zf@it\@empty
          \zf@make@font@shapes[\zf@fontname]{/BI}
            {\bfdefault}{\itdefault}{\zf@font@feat\zf@bfit@feat}
        \else
          \zf@make@font@shapes[\zf@it]{/B}
            {\bfdefault}{\itdefault}{\zf@font@feat\zf@bfit@feat}
        \fi
      \else
        \zf@make@font@shapes[\zf@bf]{/I}
          {\bfdefault}{\itdefault}{\zf@font@feat\zf@bfit@feat}
      \fi
    \else
      \zf@make@font@shapes{\zf@bfit}
        {\bfdefault}{\itdefault}{\zf@font@feat\zf@bfit@feat}
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_set_bold_slanted:}
% And bold slanted, again, only if requested:
%    \begin{macrocode}
\cs_new:Npn \fontspec_set_bold_slanted: {
  \ifx\zf@bfsl\@empty
    \ifx\zf@sl\@empty\else
      \zf@make@font@shapes[\zf@sl]{/B}
        {\bfdefault}{\sldefault}{\zf@font@feat\zf@bfsl@feat}
    \fi
  \else
    \zf@make@font@shapes{\zf@bfsl}
      {\bfdefault}{\sldefault}{\zf@font@feat\zf@bfsl@feat}
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
%
%
%
% \subsubsection{Fonts}
%
% \begin{macro}{\fontspec_set_font_type:}
% Now check if the font is to be rendered with ATSUI or ICU. This will either
% be automatic (based on the font type), or specified by the user via a font feature.
%
% This macro sets \cs{zf@atsui} or \cs{zf@icu} or \cs{zf@mm} booleans
% accordingly depending if the font in \cmd\zf@basefont\ is an \AAT\
% font or an OpenType font or a font with feature axes (either \AAT\ or
% Multiple Master), respectively.
%    \begin{macrocode}
\xetex_or_luatex:nnn { \cs_new:Npn \fontspec_set_font_type: }
   {
    \zf@tfmfalse \zf@atsuifalse \zf@icufalse \zf@mmfalse \zf@graphitefalse
    \ifcase\XeTeXfonttype\zf@basefont
      \zf@tfmtrue
    \or
      \zf@atsuitrue
      \ifnum\XeTeXcountvariations\zf@basefont > \c_zero
        \zf@mmtrue
      \fi
    \or
      \zf@icutrue
    \fi
%    \end{macrocode}
% If automatic, the \cmd{\l_fontspec_renderer_tl} token list will still be
% empty (other suffices that could be added will be later in the feature
% processing), and if it is indeed still empty, assign it a value so that the
% other weights of the font are specifically loaded with the same renderer.
%    \begin{macrocode}
    \tl_if_empty:NT \l_fontspec_renderer_tl {
      \ifzf@atsui
        \tl_set:Nn \l_fontspec_renderer_tl {/AAT}
      \else\ifzf@icu
        \tl_set:Nn \l_fontspec_renderer_tl {/ICU}
      \fi\fi
    }
  }
  {
    \zf@icutrue
  }
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\zf@make@font@shapes}
%  \doarg{Font name prefix}
%  \darg{Font name}
%  \darg{Font series}
%  \darg{Font shape}
%  \darg{Font features}
%   This macro eventually uses \cs{DeclareFontShape} to define the font shape in
%   question.
%
%   The optional first
%   argument is used when making the font shapes for bold, italic, and
%   bold italic fonts using \XeTeX's auto-recognition with |#2| as |/B|, |/I|,
%   and |/BI| font name suffixes. If no such font is found, it falls
%   back to the original font name, in which case this macro doesn't
%   proceed and the font shape is not created for the NFSS.
%    \begin{macrocode}
\newcommand*\zf@make@font@shapes[5][]{
  \begingroup
    \edef\@tempa{#1}
    \unless\ifx\@tempa\@empty
      \font\@tempfonta="\fontspec_fullname:n {#1}"~at~\f@size pt
      \edef\@tempa{\fontname\@tempfonta}
    \fi
    \font\@tempfontb="\fontspec_fullname:n {#1#2}"~at~\f@size pt
    \edef\@tempb{\fontname\@tempfontb}
    \ifx\@tempa\@tempb
      \fontspec_info:nx {no-font-shape} {#1#2}
    \else
      \edef\zf@fontname{#1#2}
      \let\zf@basefont\@tempfontb
      \zf@DeclareFontShape{#3}{#4}{#5}
%    \end{macrocode}
% Next, the small caps are defined. \cs{zf@make@smallcaps} is used to
% define the appropriate string for activating small caps in the font,
% if they exist. If we are defining small caps for the upright shape,
% then the small caps shape default is used. For an \emph{italic}
% font, however, the shape parameter is overloaded and we must call
% italic small caps by their own identifier. See \vref{sec:sishape}
% for the code that enables this usage.
%    \begin{macrocode}
      \ifx\zf@sc\@empty
        \unless\ifzf@nosc
          \zf@make@smallcaps
          \unless\ifx\zf@smallcaps\@empty
            \zf@DeclareFontShape[\zf@smallcaps]{#3}
              {\ifx#4\itdefault\sidefault\else\scdefault\fi}{#5\zf@sc@feat}
          \fi
        \fi
      \else
        \edef\zf@fontname{\zf@sc}
        \zf@DeclareFontShape{#3}
          {\ifx#4\itdefault\sidefault\else\scdefault\fi}{#5\zf@sc@feat}
      \fi
    \fi
  \endgroup
}
%    \end{macrocode}
% Note that the test for italics to choose the \cmd\sidefault\ shape
% only works while \cmd\fontspec_select:nn\ passes single tokens to this macro\dots
% \end{macro}
%
% \begin{macro}{\zf@DeclareFontShape}
% \doarg{Raw appended font feature}
% \darg{Font series}
% \darg{Font shape}
% \darg{Font features}
% Wrapper for \cmd\DeclareFontShape.
%    \begin{macrocode}
\newcommand\zf@DeclareFontShape[4][]{
  \clist_if_empty:NTF \l_fontspec_sizefeat_clist
  {
    \fontspec_get_features:n{#4}
    \tl_set:Nx \l_fontspec_nfss_tl {
      <-> \l_fontspec_scale_tl "
      \fontspec_fullname:n {\zf@fontname} :
        \l_fontspec_pre_feat_tl \l_fontspec_rawfeatures_sclist #1 "
    }
  }
%    \end{macrocode}
% Default code, above, sets things up for no optical size fonts or features.
% On the other hand, loop through \feat{SizeFeatures} arguments, which
% are of the form
% {\par\centering |SizeFeatures={{<one>},{<two>},{<three>}}|.\par}
%    \begin{macrocode}
  {
    \tl_clear:N \l_fontspec_nfss_tl
    \clist_map_inline:Nn \l_fontspec_sizefeat_clist {
      \tl_clear:N \l_fontspec_size_tl
      \tl_set_eq:NN \l_fontspec_sizedfont_tl \zf@fontname
      \fontspec_setkeys:xx {sizing} { \expandafter \@firstofone ##1 }
      \tl_if_empty:NT \l_fontspec_size_tl { \fontspec_error:n {no-size-info} }
      \fontspec_get_features:n{#4,\XKV@rm}
      \tl_put_right:Nx \l_fontspec_nfss_tl {
        <\l_fontspec_size_tl> \l_fontspec_scale_tl
        " \fontspec_fullname:n { \l_fontspec_sizedfont_tl }
          : \l_fontspec_pre_feat_tl \l_fontspec_rawfeatures_sclist #1 "
      }
    }
  }
%    \end{macrocode}
% And finally the actual font shape declaration using \cmd\l_fontspec_nfss_tl\ defined above.
% \cmd\zf@adjust\ is defined in various places to deal with things like the hyphenation
% character and interword spacing.
%    \begin{macrocode}
  \use:x{
    \exp_not:N\DeclareFontShape{\zf@enc}{\zf@family}{#2}{#3}
      {\l_fontspec_nfss_tl}{\zf@adjust}
  }
%    \end{macrocode}
% This extra stuff for the slanted shape substitution is a little bit awkward,
% but I'd rather have it here than break out yet another macro. Alternatively,
% one day I might just redefine \cmd\slshape. Why not, eh?
%    \begin{macrocode}
  \tl_if_eq:xxT {#3} {\itdefault}
  {
    \use:x {
      \exp_not:N \DeclareFontShape {\zf@enc}{\zf@family}{#2}{\sldefault}
        {<->ssub*\zf@family/#2/\itdefault}{\zf@adjust}
    }
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\l_fontspec_pre_feat_tl}
% These are the features always applied to a font selection before other
% features.
%    \begin{macrocode}
\xetex_or_luatex:nnn { \tl_set:Nn \l_fontspec_pre_feat_tl }
  {
    \ifzf@icu
      script   = \l_fontspec_script_tl ;
      language = \l_fontspec_lang_tl   ;
    \fi
  }
  {
    mode     = \l_fontspec_mode_tl   ;
    script   = \l_fontspec_script_tl ;
    language = \l_fontspec_lang_tl   ;
  }
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\zf@update@family}
% This macro is used to build up a complex family name based on its
% features.
%
% \cmd{\zf@firsttime} is set true in \cmd{\fontspec_select:nn} only the first
% time \cmd{zf@get@feature@requests} is called, so that the family
% name is only created once.
%    \begin{macrocode}
\newcommand*{\zf@update@family}[1]{
  \ifzf@firsttime
    \xdef\zf@family@long{\zf@family@long#1}
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
% \subsubsection{Features}
%
% \begin{macro}{\fontspec_get_features:n}
%   This macro is a wrapper for |\setkeys| which expands and adds a
%   default specification to the original passed options. It begins by
%   initialising the commands used to hold font-feature specific
%   strings.
%    \begin{macrocode}
\cs_set:Npn \fontspec_get_features:n #1 {
  \let\l_fontspec_rawfeatures_sclist     \@empty
  \tl_clear:N \l_fontspec_scale_tl
  \let\zf@adjust \@empty
  \fontspec_setkeys:xx {options} {#1}
  \tl_if_empty:NF \XKV@rm {
    \fontspec_error:nx {unknown-options} { \exp_not:V \XKV@rm }
  }
  \PackageInfo{fontspec}{Raw~ font~ features~ "\l_fontspec_rawfeatures_sclist"}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_init:}
% Initialisations that either need to occur globally:
% (all setting of these variables is done locally inside a group)
%    \begin{macrocode}
\tl_clear:N \zf@bf
\tl_clear:N \zf@it
\tl_clear:N \zf@bfit
\tl_clear:N \zf@sl
\tl_clear:N \zf@bfsl
\tl_clear:N \zf@sc
\tl_clear:N \zf@up@feat
\tl_clear:N \zf@bf@feat
\tl_clear:N \zf@it@feat
\tl_clear:N \zf@bfit@feat
\tl_clear:N \zf@sl@feat
\tl_clear:N \zf@bfsl@feat
\tl_clear:N \zf@sc@feat
\clist_clear:N \l_fontspec_sizefeat_clist
%    \end{macrocode}
% Or once per fontspec font invocation:
% (Some of these may be redundant.
% Check whether they're assigned to globally or not.)
%    \begin{macrocode}
\newcommand*\fontspec_init:{
  \zf@icufalse
  \cs_set_eq:NN \fontspec_namewrap:n \use:n
  \tl_clear:N \l_fontspec_optical_size_tl
  \tl_clear:N \l_fontspec_renderer_tl
  \tl_set:Nn \l_fontspec_script_name_tl {Latin}
  \tl_set:Nn \l_fontspec_script_tl      {latn}
  \tl_set:Nn \l_fontspec_lang_name_tl {Default}
  \tl_set:Nn \l_fontspec_lang_tl      {DFLT}
  \luatex_if_engine:T {
    \tl_set:Nn \l_fontspec_mode_tl {node}
    \luatexprehyphenchar   =`\-  % fixme
    \luatexposthyphenchar  = 0   % fixme
    \luatexpreexhyphenchar = 0   % fixme
    \luatexpostexhyphenchar= 0   % fixme
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\zf@make@smallcaps}\label{mac:zf@make@smallcaps}
% This macro checks if the font contains small caps, and if so
% creates the string for accessing them in \cmd{\zf@smallcaps}.
%    \begin{macrocode}
\newcommand*\zf@make@smallcaps{
  \let\zf@smallcaps\@empty
  \xetex_or_luatex:nn
  {
    \ifzf@atsui
      \fontspec_make_AAT_feature_string:nn{3}{3}
      \unless\ifx\@tempa\@empty
        \edef\zf@smallcaps{\@tempa;}
      \fi
    \fi
    \ifzf@icu
      \fontspec_check_ot_feat:nT {+smcp} {\edef\zf@smallcaps{+smcp;}}
    \fi
  }
  {
    \fontspec_check_ot_feat:nT {+smcp} {\edef\zf@smallcaps{+smcp;}}
  }
}
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\sclist_put_right:Nn}
% I'm hardly going to write an `sclist' module but a couple of functions are
% necessary.
%    \begin{macrocode}
\cs_new:Npn \sclist_put_right:Nn #1#2 {
  \tl_if_empty:NT #1 {
    
  }
}
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\zf@update@ff}
% \cmd{\l_fontspec_rawfeatures_sclist} is the string used to define the list of specific
% font features. Each time another font feature is requested, this
% macro is used to add that feature to the list. Font features are
% separated by semicolons.
%    \begin{macrocode}
\newcommand*\zf@update@ff[1]{
  \unless\ifzf@firsttime
    \xdef\l_fontspec_rawfeatures_sclist{\l_fontspec_rawfeatures_sclist #1;}
  \fi
}
%    \end{macrocode}
% \end{macro}
%
%
%
% \begin{macro}{\fontspec_make_feature:nnn}
%   This macro is called by each feature key selected, and runs
%   according to which type of font is selected.
%    \begin{macrocode}
\cs_new:Npn \fontspec_make_feature:nnn #1#2#3 {
  \xetex_or_luatex:nn
  {
    \ifzf@atsui
      \fontspec_make_AAT_feature:nn {#1}{#2}
    \fi
    \ifzf@icu
      \fontspec_make_ICU_feature:n {#3}
    \fi
  }
  {
    \fontspec_make_ICU_feature:n {#3}
  }
}
\cs_new:Npn \fontspec_make_AAT_feature:nn #1#2 {
  \tl_if_empty:nTF {#1}
  {
    \fontspec_warning:n {aat-feature-not-exist}
  }
  {
    \fontspec_make_AAT_feature_string:nn {#1}{#2}
    \ifx\@tempa\@empty
      \fontspec_warning:nx {aat-feature-not-exist-in-font} {#1,#2}
    \else
      \zf@update@family{+#1,#2}
      \zf@update@ff\@tempa
    \fi
  }
}
\cs_new:Npn \fontspec_make_ICU_feature:n #1 {
  \tl_if_empty:nTF {#1}
  {
    \fontspec_warning:n {icu-feature-not-exist}
  }
  {
    \fontspec_check_ot_feat:nTF {#1} {
      \zf@update@family{#1}
      \zf@update@ff{#1}
    }{
      \fontspec_warning:nx {icu-feature-not-exist-in-font} {#1}
    }
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\zf@define@font@feature}
% \begin{macro}{\zf@define@feature@option}
% These macros are used in order to simplify font feature definition later on.
%    \begin{macrocode}
\newcommand*\zf@define@font@feature[1]{
  \define@key[zf]{options}{#1}{{\setkeys[zf@feat]{#1}{##1}}}
}
\newcommand*\zf@define@feature@option[5]{
  \define@key[zf@feat]{#1}{#2}[]{\fontspec_make_feature:nnn{#3}{#4}{#5}}
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\keyval@alias@key}
% This macro maps one \pkg{xkeyval} key to another.
%    \begin{macrocode}
\newcommand*\keyval@alias@key[4][KV]{
  \cs_set_eq:cc{#1@#2@#4}{#1@#2@#3}
  \cs_set_eq:cc{#1@#2@#4@default}{#1@#2@#3@default}
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\multi@alias@key}
% This macro iterates through families to map one key to another,
% regardless of which family it's contained within.
%    \begin{macrocode}
\newcommand*\multi@alias@key[2]{
  \key@ifundefined[zf]{options}{#1}
    {
      \key@ifundefined[zf]{preparse}{#1}
      {
        \key@ifundefined[zf]{preparse-external}{#1}
          { \fontspec_warning:nx {rename-feature-not-exist} {#1} }
          { \keyval@alias@key[zf]{preparse-external}{#1}{#2} }
      }
      { \keyval@alias@key[zf]{preparse}{#1}{#2} }
    }
    { \keyval@alias@key[zf]{options}{#1}{#2} }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_make_AAT_feature_string:nn}
%   This macro takes the numerical codes for a font feature and
%   creates a specified macro containing the string required in the
%   font definition to turn that feature on or off. Used primarily in
%   \cmd\zf@make@aat@feature, but also used to check if small caps
%   exists in the requested font (see page~\pageref{mac:zf@make@smallcaps}).
%
%    \begin{macrocode}
\cs_new:Npn \fontspec_make_AAT_feature_string:nn #1#2 {
  \edef\@tempa{\XeTeXfeaturename\zf@basefont #1}
  \unless\ifx\@tempa\@empty
%    \end{macrocode}
% For exclusive selectors, it's easy; just grab the string:
%    \begin{macrocode}
    \ifnum\XeTeXisexclusivefeature\zf@basefont #1>0
      \edef\@tempb{\XeTeXselectorname\zf@basefont #1\space #2}
%    \end{macrocode}
% For \emph{non}-exclusive selectors, it's a little more complex.
% If the selector is even, it corresponds to switching the feature on:
%    \begin{macrocode}
    \else
      \unless\ifodd #2
        \edef\@tempb{\XeTeXselectorname\zf@basefont #1\space #2}
%    \end{macrocode}
% If the selector is \emph{odd}, it corresponds to switching the feature off.
% But \XeTeX\ doesn't return a selector string for this number, since the
% feature is defined for the `switching on' value. So we need to check the
% selector of the previous number, and then prefix the feature string with |!|
% to denote the switch.
%    \begin{macrocode}
      \else
        \edef\@tempb{
          \XeTeXselectorname\zf@basefont #1\space \numexpr#2-1\relax
        }
        \unless\ifx\@tempb\@empty
          \edef\@tempb{!\@tempb}
        \fi
      \fi
    \fi
%    \end{macrocode}
% Finally, save out the complete feature string in \cmd\@tempa.
% If the selector doesn't exist, re-initialise the feature string to empty.
%    \begin{macrocode}
    \unless\ifx\@tempb\@empty
      \edef\@tempa{\@tempa=\@tempb}
    \else
      \let\@tempa\@empty
    \fi
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_iv_str_to_num:n}
% \begin{macro}{\fontspec_v_str_to_num:n}
% This macro takes a four character string and converts it to the
% numerical representation required for \XeTeX\ OpenType script/language/feature
% purposes. The output is stored in \cmd\l_fontspec_strnum_int.
%
% The reason it's ugly is because the input can be of the form of any of these:
% `|abcd|', `|abc|', `|abc |', `|ab|', `|ab  |', \etc.
% (It is assumed the first two chars are \emph{always} not spaces.) So this macro
% reads in the string, delimited by a space; this input is padded with \cmd\@empty s
% and anything beyond four chars is snipped. The \cmd\@empty s then are used to reconstruct
% the spaces in the string to number calculation.
%
% The variant \cmd\fontspec_v_str_to_num:n\ is used when looking at features, which are passed around
% with prepended plus and minus signs (\eg, \texttt{+liga}, \texttt{-dlig}); it
% simply strips off the first char of the input before calling the normal \cmd\fontspec_iv_str_to_num:n.
%
% It's probable that all OpenType features \emph{are} in fact four characters long, but
% not impossible that they aren't. So I'll leave the less efficient parsing stage in there
% even though it's not strictly necessary for now.
%    \begin{macrocode}
\cs_set:Npn \fontspec_iv_str_to_num:n #1 {
  \fontspec_iv_str_to_num:w #1 \@empty \@empty \q_nil
}
\cs_set:Npn \fontspec_iv_str_to_num:w #1#2#3#4#5 \q_nil {
  \int_set:Nn \l_fontspec_strnum_int {
      `#1 * "1000000
    + `#2 * "10000
    + \ifx \@empty #3 32 \else `#3 \fi * "100
    + \ifx \@empty #4 32 \else `#4 \fi
  }
}
\cs_set:Npn \fontspec_v_str_to_num:n #1 {
  \bool_if:nTF
    {
      \tl_if_head_eq_charcode_p:nN {#1} {+} ||
      \tl_if_head_eq_charcode_p:nN {#1} {-}
    }
    {
      \exp_after:wN \fontspec_iv_str_to_num:n
      \exp_after:wN { \use_none:n #1 }
    }
    { \fontspec_iv_str_to_num:n {#1} }
}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\fontspec_check_script:nTF}
% This macro takes an OpenType script tag and checks if it exists in the current
% font. The output boolean is \cmd\@tempswatrue. \cmd\l_fontspec_strnum_int\ is used to store
% the number corresponding to the script tag string.
%    \begin{macrocode}
\xetex_or_luatex:nnn {\prg_new_conditional:Nnn \fontspec_check_script:n {TF}}
  {
    \fontspec_iv_str_to_num:n{#1}
    \@tempcntb\XeTeXOTcountscripts\zf@basefont
    \c@zf@index\z@ \@tempswafalse
    \loop\ifnum\c@zf@index<\@tempcntb
      \ifnum\XeTeXOTscripttag\zf@basefont\c@zf@index=\l_fontspec_strnum_int
        \@tempswatrue
        \c@zf@index\@tempcntb
      \else
        \advance\c@zf@index\@ne
      \fi
    \repeat
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
  {
    \directlua{fontspec.check_ot_script("zf@basefont", "#1")}
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_check_lang:nTF}
% This macro takes an OpenType language tag and checks if it exists in the current
% font/script. The output boolean is \cmd\@tempswatrue. \cmd\l_fontspec_strnum_int\ is used to store
% the number corresponding to the language tag string.
% The script used is whatever's held in \cmd\c@zf@script. By default, that's the
% number corresponding to `|latn|'.
%    \begin{macrocode}
\xetex_or_luatex:nnn {\prg_new_conditional:Nnn \fontspec_check_lang:n {TF}}
  {
    \fontspec_iv_str_to_num:n{#1}
    \@tempcntb\XeTeXOTcountlanguages\zf@basefont\c@zf@script
    \c@zf@index\z@
    \@tempswafalse
    \loop\ifnum\c@zf@index<\@tempcntb
      \ifnum\XeTeXOTlanguagetag\zf@basefont\c@zf@script\c@zf@index=\l_fontspec_strnum_int
        \@tempswatrue
        \c@zf@index\@tempcntb
      \else
        \advance\c@zf@index\@ne
      \fi
    \repeat
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
  {
    \directlua{
      fontspec.check_ot_lang( "zf@basefont", "#1", "\l_fontspec_script_tl" )
    }
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\fontspec_check_ot_feat:nTF}
% \begin{macro}{\fontspec_check_ot_feat:nT}
% This macro takes an OpenType feature tag and checks if it exists in the current
% font/script/language.
% The output boolean is \cmd\@tempswa. \cmd\l_fontspec_strnum_int\ is used to store
% the number corresponding to the feature tag string.
% The script used is whatever's held in \cmd\c@zf@script. By default, that's the
% number corresponding to `|latn|'. The language used is \cmd\c@zf@language,
% by default |0|, the `default language'.
%    \begin{macrocode}
\xetex_or_luatex:nnn
   { \prg_new_conditional:Nnn \fontspec_check_ot_feat:n {TF,T} }
   {
    \@tempcntb\XeTeXOTcountfeatures\zf@basefont\c@zf@script\c@zf@language
    \fontspec_v_str_to_num:n {#1}
    \c@zf@index\z@
    \@tempswafalse
    \loop\ifnum\c@zf@index<\@tempcntb
      \ifnum\XeTeXOTfeaturetag\zf@basefont\c@zf@script\c@zf@language
            \c@zf@index=\l_fontspec_strnum_int
        \@tempswatrue
        \c@zf@index\@tempcntb
      \else
        \advance\c@zf@index\@ne
      \fi
    \repeat
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
  {
    \directlua{
      fontspec.check_ot_feat(
                              "zf@basefont", "#1",
                              "\l_fontspec_lang_tl", "\l_fontspec_script_tl"
                            )
    }
    \if@tempswa \prg_return_true: \else: \prg_return_false: \fi:
  }
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \subsection{\pkg{keyval} definitions}
%
% This is the tedious section where we correlate all possible
% (eventually) font feature requests with their \XeTeX\ representations.
%
% \subsubsection{Pre-parsing naming information}
%
% These features are extracted from the font feature list before all others, using
% \pkg{xkeyval}'s \cmd\setkeys|*|.
%
% \paragraph{\feat{ExternalLocation}}
% For fonts that aren't installed in the system. If no argument is given, the font is located
% with |kpsewhich|; it's either in the current directory or the \TeX\ tree. Otherwise, the
% argument given defines the file path of the font.
%    \begin{macrocode}
\bool_new:N \l_fontspec_external_bool
\define@key[zf]{preparse-external}{ExternalLocation}[]{
  \zf@nobftrue
  \zf@noittrue
  \bool_set_true:N \l_fontspec_external_bool
  \cs_gset:Npn \fontspec_namewrap:n ##1 { [ #1 ##1 ] }
  \xetex_if_engine:T { \setkeys[zf]{preparse}{Renderer=ICU} }
}
\aliasfontfeature{ExternalLocation}{Path}
%    \end{macrocode}
%
% \paragraph{\feat{Extension}}
% For fonts that aren't installed in the system. Specifies the font extension
% to use.
%    \begin{macrocode}
\define@key[zf]{preparse-external}{Extension}{
  \tl_set:Nn \l_fontspec_extension_tl {#1}
  \bool_if:NF \l_fontspec_external_bool {
    \setkeys*[zf]{preparse-external}{ExternalLocation}
  }
}
\tl_clear:N \l_fontspec_extension_tl
%    \end{macrocode}
%
% \subsubsection{Pre-parsed features}
%
% After the font name(s) have been sorted out, now need to extract any
% renderer/font configuration features that need to be processed before
% all other font features.
%
% \paragraph{\feat{Renderer}}
% This feature must be processed before all others (the other font shape and features options are also pre-parsed for convenience) because the renderer determines the format of the features and even whether certain features are available.
%    \begin{macrocode}
\define@choicekey[zf]{preparse}{Renderer}[\l_tmpa_tl\l_tmpa_num]
    {AAT,ICU,Graphite,Full,Basic}{
  \zf@update@family{+rend:#1}
  \intexpr_compare:nTF {\l_tmpa_num < 3} {
    \xetex_or_luatex:nn
    {
      \tl_set:Nv \l_fontspec_renderer_tl {g_fontspec_renderer_tag_\l_tmpa_tl}
    }
    {
      \fontspec_warning:nx {only-xetex-feature} {Renderer=AAT/ICU/Graphite}
    }
  }{
    \xetex_or_luatex:nn
    { \fontspec_warning:nx {only-luatex-feature} {Renderer=Full/Basic} }
    { \tl_set:Nv \l_fontspec_mode_tl {g_fontspec_mode_tag_\l_tmpa_tl}  }
  }
}
\tl_set:cn {g_fontspec_renderer_tag_AAT} {/AAT}
\tl_set:cn {g_fontspec_renderer_tag_ICU} {/ICU}
\tl_set:cn {g_fontspec_renderer_tag_Graphite} {/GR}
\tl_set:cn {g_fontspec_mode_tag_Full}  {node}
\tl_set:cn {g_fontspec_mode_tag_Basic} {base}
%    \end{macrocode}
%
% \paragraph{OpenType script/language}
% See later for the resolutions from \pkg{fontspec} features to OpenType definitions.
%    \begin{macrocode}
\define@key[zf]{preparse}{Script}{
  \xetex_if_engine:T { \setkeys[zf]{preparse}{Renderer=ICU} }
  \tl_set:Nn \l_fontspec_script_name_tl {#1}
  \zf@update@family{+script:#1}
}
%    \end{macrocode}
% Exactly the same:
%    \begin{macrocode}
\define@key[zf]{preparse}{Language}{
  \xetex_if_engine:T { \setkeys[zf]{preparse}{Renderer=ICU} }
  \tl_set:Nn \l_fontspec_lang_name_tl {#1}
  \zf@update@family{+language:#1}
}
%    \end{macrocode}
%
% \subsubsection{Bold/italic choosing options}
%
% The \feat{Bold}, \feat{Italic}, and \feat{BoldItalic}
% features are for defining explicitly the bold and italic fonts used
% in a font family.
%
% \paragraph{Fonts}
% Upright:
%    \begin{macrocode}
\define@key[zf]{preparse-external}{UprightFont}{
  \fontspec_complete_fontname:Nn \zf@up {#1}
  \zf@update@family{up:#1}
}
%    \end{macrocode}
% Bold:
%    \begin{macrocode}
\define@key[zf]{preparse-external}{BoldFont}{
  \edef\@tempa{#1}
  \ifx\@tempa\@empty
    \zf@nobftrue
    \zf@update@family{nobf}
  \else
    \zf@nobffalse
    \fontspec_complete_fontname:Nn \zf@bf {#1}
    \zf@update@family{bf:#1}
  \fi
}
%    \end{macrocode}
% Same for italic:
%    \begin{macrocode}
\define@key[zf]{preparse-external}{ItalicFont}{
  \edef\@tempa{#1}
  \ifx\@tempa\@empty
    \zf@noittrue
    \zf@update@family{noit}
  \else
    \zf@noitfalse
    \fontspec_complete_fontname:Nn \zf@it {#1}
    \zf@update@family{it:#1}
  \fi
}
%    \end{macrocode}
% Simpler for bold+italic \& slanted:
%    \begin{macrocode}
\define@key[zf]{preparse-external}{BoldItalicFont}{
  \fontspec_complete_fontname:Nn \zf@bfit {#1}
  \zf@update@family{bfit:#1}
}
\define@key[zf]{preparse-external}{SlantedFont}{
  \fontspec_complete_fontname:Nn \zf@sl {#1}
  \zf@update@family{sl:#1}
}
\define@key[zf]{preparse-external}{BoldSlantedFont}{
  \fontspec_complete_fontname:Nn \zf@bfsl {#1}
  \zf@update@family{bfsl:#1}
}
%    \end{macrocode}
% Small caps isn't pre-parsed because it can vary with others above:
%    \begin{macrocode}
\define@key[zf]{options}{SmallCapsFont}{
  \edef\@tempa{#1}
  \ifx\@tempa\@empty
    \zf@nosctrue
    \zf@update@family{nosc}
  \else
    \zf@noscfalse
    \fontspec_complete_fontname:Nn \zf@sc {#1}
    \zf@update@family{sc:\zap@space #1~\@empty}
  \fi
}
%    \end{macrocode}
%
% \begin{macro}{\fontspec_complete_fontname:Nn}
% This macro defines |#1| as the input with any |*| tokens of its input
% replaced by the font name. This lets us define supplementary fonts in full
% (``\texttt{Baskerville Semibold}'') or in abbreviation (``\texttt{* Semibold}'').
%    \begin{macrocode}
\cs_set:Npn \fontspec_complete_fontname:Nn #1#2 {
  \tl_set:Nn #1 {#2}
  \tl_replace_all_in:Nnx #1 {*} {\zf@fontname}
}
\cs_generate_variant:Nn \tl_replace_all_in:Nnn {Nnx}
%    \end{macrocode}
% \end{macro}
%
% \paragraph{Features}
%    \begin{macrocode}
\define@key[zf]{preparse}{UprightFeatures}{
  \def\zf@up@feat{, #1}
  \zf@update@family{rmfeat:#1}
}
\define@key[zf]{preparse}{BoldFeatures}{
  \def\zf@bf@feat{, #1}
  \zf@update@family{bffeat:#1}
}
\define@key[zf]{preparse}{ItalicFeatures}{
  \def\zf@it@feat{, #1}
  \zf@update@family{itfeat:#1}
}
\define@key[zf]{preparse}{BoldItalicFeatures}{
  \def\zf@bfit@feat{, #1}
  \zf@update@family{bfitfeat:#1}
}
\define@key[zf]{preparse}{SlantedFeatures}{
  \def\zf@sl@feat{, #1}
  \zf@update@family{slfeat:#1}
}
\define@key[zf]{preparse}{BoldSlantedFeatures}{
  \def\zf@bfsl@feat{, #1}
  \zf@update@family{bfslfeat:#1}
}
%    \end{macrocode}
% Note that small caps features can vary by shape, so these in fact \emph{aren't} pre-parsed.
%    \begin{macrocode}
\define@key[zf]{options}{SmallCapsFeatures}{
  \unless\ifzf@firsttime\def\zf@sc@feat{, #1}\fi
  \zf@update@family{scfeat:\zap@space #1~\@empty}
}
%    \end{macrocode}
%
% paragraph{Features varying by size}
% TODO: sizezfeatures and italicfont (etc) don't play nice
%    \begin{macrocode}
\define@key[zf]{preparse}{SizeFeatures}{
  \unless\ifzf@firsttime\def\l_fontspec_sizefeat_clist{#1}\fi
  \zf@update@family{sizefeat:\zap@space #1~\@empty}
}
%    \end{macrocode}
%
%    \begin{macrocode}
\define@key[zf]{sizing}{Size}{ \tl_set:Nn \l_fontspec_size_tl {#1} }
\define@key[zf]{sizing}{Font}{
  \fontspec_complete_fontname:Nn \l_fontspec_sizedfont_tl {#1}
}
%    \end{macrocode}
%
% \subsubsection{Font-independent features}
%
% These features can be applied to any font.
%
% \paragraph{Scale}
% If the input isn't one of the pre-defined string options, then
% it's gotta be numerical. \cs{fontspec_calc_scale:n} does all the work in
% the auto-scaling cases.
%    \begin{macrocode}
\define@key[zf]{options}{Scale}{
  \prg_case_str:nnn {#1}
  {
    {MatchLowercase} { \fontspec_calc_scale:n {5} }
    {MatchUppercase} { \fontspec_calc_scale:n {8} }
  }
  { \tl_set:Nx \l_fontspec_scale_tl {#1} }
  \zf@update@family{+scale:\l_fontspec_scale_tl}
  \tl_set:Nx \l_fontspec_scale_tl { s*[\l_fontspec_scale_tl] }
}
%    \end{macrocode}
%
% \begin{macro}{\fontspec_calc_scale:n}
% This macro calculates the amount of scaling between the default
% roman font and the (default shape of) the font being selected such
% that the font dimension that is input is equal for both. The only
% font dimensions that justify this are 5 (lowercase height)
% and 8 (uppercase height in \XeTeX).
%
% This script is executed for every extra shape, which seems wasteful,
% but allows alternate italic shapes from a separate font, say, to
% be loaded and to be auto-scaled correctly. Even if this would be ugly.
%    \begin{macrocode}
\cs_new:Npn \fontspec_calc_scale:n #1 {
  \group_begin:
    \rmfamily
    \fontspec_set_font_dimen:NnN \@tempdima {#1} \font
    \fontspec_set_font_dimen:NnN \@tempdimb {#1} \zf@basefont
    \dim_set:Nn \@tempdimc { 1pt*\@tempdima/\@tempdimb }
    \tl_gset:Nx \l_fontspec_scale_tl {\strip@pt\@tempdimc}
    \fontspec_info:n {set-scale}
  \group_end:
}
%    \end{macrocode}
% This function sets the dimension |#1| (for font |#3|) to what would be known
% as the `fontdimen' |#2| in \TeX\ but apparently isn't set that way in
% \LuaTeX.
%    \begin{macrocode}
\xetex_or_luatex:nnn { \cs_new:Npn \fontspec_set_font_dimen:NnN #1#2#3 }
{
  \dim_set:Nn #1 { \fontdimen #2 #3 }
}
{
  \dim_set:Nn #1 { \directlua{ fontspec.get_dimen(#2, "\cs_to_str:N #3") } }
}
%    \end{macrocode}
% \end{macro}
%
% \paragraph{Inter-word space}
% These options set the relevant \cmd\fontdimen s for the
% font being loaded.
%    \begin{macrocode}
\define@key[zf]{options}{WordSpace}{
  \zf@update@family{+wordspace:#1}
  \unless\ifzf@firsttime
    \zf@wordspace@parse#1,\zf@@ii,\zf@@iii,\zf@@
  \fi
}
%    \end{macrocode}
%
% \begin{macro}{\zf@wordspace@parse}
% This macro determines if the input to \feat{WordSpace} is
% of the form |{X}| or |{X,Y,Z}| and executes the font scaling.
% If the former input, it executes |{X,X,X}|.
%    \begin{macrocode}
\def\zf@wordspace@parse#1,#2,#3,#4\zf@@{
  \def\@tempa{#4}
  \ifx\@tempa\@empty
    \setlength\@tempdima{#1\fontdimen2\zf@basefont}
    \@tempdimb\@tempdima
    \@tempdimc\@tempdima
  \else
    \setlength\@tempdima{#1\fontdimen2\zf@basefont}
    \setlength\@tempdimb{#2\fontdimen3\zf@basefont}
    \setlength\@tempdimc{#3\fontdimen4\zf@basefont}
  \fi
  \edef\zf@adjust{
    \zf@adjust
    \fontdimen2\font\the\@tempdima
    \fontdimen3\font\the\@tempdimb
    \fontdimen4\font\the\@tempdimc
  }
}
%    \end{macrocode}
% \end{macro}
%
% \paragraph{Punctuation space}
% Scaling factor for the nominal \cmd\fontdimen \#7.
%    \begin{macrocode}
\define@key[zf]{options}{PunctuationSpace}{
  \zf@update@family{+punctspace:#1}
  \setlength\@tempdima{#1\fontdimen7\zf@basefont}
  \edef\zf@adjust{\zf@adjust\fontdimen7\font\the\@tempdima}
}
%    \end{macrocode}
%
% \paragraph{Letterspacing}
%    \begin{macrocode}
\define@key[zf]{options}{LetterSpace}{
  \zf@update@family{+tracking:#1}
  \zf@update@ff{letterspace=#1}
}
%    \end{macrocode}
%
% \paragraph{Hyphenation character}
% This feature takes one of three arguments: `\opt{None}',
% \meta{glyph}, or \meta{slot}. If the input isn't the first,
% and it's one character, then it's the second; otherwise, it's
% the third.
%    \begin{macrocode}
\define@key[zf]{options}{HyphenChar}{
  \zf@update@family{+hyphenchar:#1}
  \edef\@tempa{#1}
  \edef\@tempb{None}
  \ifx\@tempa\@tempb
    \xetex_or_luatex:nnn { \g@addto@macro\zf@adjust }
      { \hyphenchar\font-1\relax }
      { \luatexprehyphenchar=-1\relax }
  \else
    \zf@check@one@char#1\zf@@
    \ifx\@tempb\@empty
      \xetex_or_luatex:nn {
        {\zf@basefont\expandafter\ifnum\expandafter\XeTeXcharglyph
              \expandafter`#1 > \z@
           \g@addto@macro\zf@adjust{%
             {\expandafter\hyphenchar\expandafter
              \font\expandafter`#1}}%
        \else
          \fontspec_error:nx {no-glyph}{#1}
        \fi}%
      }{
        \ifnum\directlua{
            fontspec.sprint(fontspec.charglyph('#1', 'zf@basefont'))
        } > \z@
          \g@addto@macro\zf@adjust{\luatexprehyphenchar=`#1\relax}
        \else
          \fontspec_error:nx {no-glyph}{#1}
        \fi
      }
    \else
      \xetex_or_luatex:nn {
        {\zf@basefont\ifnum\XeTeXcharglyph#1 > \z@
          \g@addto@macro\zf@adjust{\hyphenchar\font#1\relax}%
        \else
          \fontspec_error:nx {no-glyph}{#1}
        \fi}%
      }{
        \ifnum\directlua{
            fontspec.sprint(fontspec.charglyph('#1', 'zf@basefont'))
        } > \z@
          \g@addto@macro\zf@adjust{\luatexprehyphenchar=#1\relax}
        \else
          \fontspec_error:nx {no-glyph}{#1}
        \fi
      }
    \fi
  \fi
}
\def\zf@check@one@char#1#2\zf@@{\def\@tempb{#2}}
%    \end{macrocode}
%
% \paragraph{Color}
%    \begin{macrocode}
\define@key[zf]{options}{Color}{
  \zf@update@family{+col:#1}
  \zf@update@ff{color=#1}
}
\keyval@alias@key[zf]{options}{Color}{Colour}
%    \end{macrocode}
%
% \paragraph{Mapping}
%    \begin{macrocode}
\xetex_or_luatex:nnn {
  \define@key[zf]{options}{Mapping}
}{
  \zf@update@family{+map:#1}
  \zf@update@ff{mapping=#1}
}{
  \tl_if_eq:nnTF {#1} {tex-text} {
    \fontspec_warning:n {no-mapping-ligtex}
    \msg_redirect_name:nnn {fontspec} {no-mapping-ligtex} {none}
    \setkeys[zf]{options}{ Ligatures=TeX }
  }{
    \fontspec_warning:n {no-mapping}
  }
}
%    \end{macrocode}
%
% \paragraph{FeatureFile}
%    \begin{macrocode}
\define@key[zf]{options}{FeatureFile}{
  \zf@update@family{+fea:#1}
  \zf@update@ff{featurefile=#1}
}
%    \end{macrocode}
%
%
% \subsubsection{Continuous font axes}
%
%    \begin{macrocode}
\define@key[zf]{options}{Weight}{
  \zf@update@family{+weight:#1}
  \zf@update@ff{weight=#1}
}
\define@key[zf]{options}{Width}{
  \zf@update@family{+width:#1}
  \zf@update@ff{width=#1}
}
\define@key[zf]{options}{OpticalSize}{
  \xetex_or_luatex:nn {
    \ifzf@icu
      \tl_set:Nn \l_fontspec_optical_size_tl {/ S = #1}
      \zf@update@family{+size:#1}
    \fi
    \ifzf@mm
      \zf@update@family{+size:#1}
      \zf@update@ff{optical size=#1}
    \fi
    \ifzf@icu\else
      \ifzf@mm\else
        \ifzf@firsttime
          \fontspec_warning:n {no-opticals}
        \fi
      \fi
    \fi
  }{
    \tl_set:Nn \l_fontspec_optical_size_tl {/ S = #1}
    \zf@update@family{+size:#1}
  }
}
%    \end{macrocode}
%
% \subsubsection{Font transformations}
%    \begin{macrocode}
\define@key[zf]{options}{FakeSlant}{
  \zf@update@family{+slant:#1}
  \zf@update@ff{slant=#1}
}
\define@key[zf]{options}{FakeStretch}{
  \zf@update@family{+extend:#1}
  \zf@update@ff{extend=#1}
}
\define@key[zf]{options}{FakeBold}{
  \zf@update@family{+embolden:#1}
  \zf@update@ff{embolden=#1}
}
%    \end{macrocode}
%
%
% \subsubsection{Ligatures}
% The call to the nested keyval family must be wrapped in braces to
% hide the parent list (this later requires the use of global
% definitions (|\xdef|) in |\zf@update@...|). Both \AAT\ and OpenType
% names are offered to chose |Rare|/|Discretionary| ligatures.
%    \begin{macrocode}
\zf@define@font@feature{Ligatures}
\zf@define@feature@option{Ligatures}{Required}       {1}{0}{+rlig}
\zf@define@feature@option{Ligatures}{NoRequired}     {1}{1}{-rlig}
\zf@define@feature@option{Ligatures}{Common}         {1}{2}{+liga}
\zf@define@feature@option{Ligatures}{NoCommon}       {1}{3}{-liga}
\zf@define@feature@option{Ligatures}{Rare}           {1}{4}{+dlig}
\zf@define@feature@option{Ligatures}{NoRare}         {1}{5}{-dlig}
\zf@define@feature@option{Ligatures}{Discretionary}  {1}{4}{+dlig}
\zf@define@feature@option{Ligatures}{NoDiscretionary}{1}{5}{-dlig}
\zf@define@feature@option{Ligatures}{Contextual}     {}{}  {+clig}
\zf@define@feature@option{Ligatures}{NoContextual}   {}{}  {-clig}
\zf@define@feature@option{Ligatures}{Historical}     {}{}  {+hlig}
\zf@define@feature@option{Ligatures}{NoHistorical}   {}{}  {-hlig}
\zf@define@feature@option{Ligatures}{Logos}          {1}{6} {}
\zf@define@feature@option{Ligatures}{NoLogos}        {1}{7} {}
\zf@define@feature@option{Ligatures}{Rebus}          {1}{8} {}
\zf@define@feature@option{Ligatures}{NoRebus}        {1}{9} {}
\zf@define@feature@option{Ligatures}{Diphthong}      {1}{10}{}
\zf@define@feature@option{Ligatures}{NoDiphthong}    {1}{11}{}
\zf@define@feature@option{Ligatures}{Squared}        {1}{12}{}
\zf@define@feature@option{Ligatures}{NoSquared}      {1}{13}{}
\zf@define@feature@option{Ligatures}{AbbrevSquared}  {1}{14}{}
\zf@define@feature@option{Ligatures}{NoAbbrevSquared}{1}{15}{}
\zf@define@feature@option{Ligatures}{Icelandic}      {1}{32}{}
\zf@define@feature@option{Ligatures}{NoIcelandic}    {1}{33}{}
%    \end{macrocode}
% Emulate CM extra ligatures.
%    \begin{macrocode}
\define@key[zf@feat]{Ligatures}{TeX}[]{
  \xetex_or_luatex:nn {
    \zf@update@family{+map:tex-text}
    \zf@update@ff{mapping=tex-text}
  }{
    \zf@update@family{+tlig+trep}
    \zf@update@ff{+tlig;+trep}
  }
}
%    \end{macrocode}
%
% \subsubsection{Letters}
%    \begin{macrocode}
\zf@define@font@feature{Letters}
\zf@define@feature@option{Letters}{Normal}             {3}{0}{}
\zf@define@feature@option{Letters}{Uppercase}          {3}{1}{+case}
\zf@define@feature@option{Letters}{Lowercase}          {3}{2}{}
\zf@define@feature@option{Letters}{SmallCaps}          {3}{3}{+smcp}
\zf@define@feature@option{Letters}{PetiteCaps}         {} {} {+pcap}
\zf@define@feature@option{Letters}{UppercaseSmallCaps} {} {} {+c2sc}
\zf@define@feature@option{Letters}{UppercasePetiteCaps}{} {} {+c2pc}
\zf@define@feature@option{Letters}{InitialCaps}        {3}{4}{}
\zf@define@feature@option{Letters}{Unicase}            {} {} {+unic}
%    \end{macrocode}
%
% \subsubsection{Numbers}
%
% These were originally separated into \feat{NumberCase} and
% \feat{NumberSpacing} following \AAT, but it makes more sense to
% combine them.
%
% Both naming conventions are offered to select the number case.
%
%    \begin{macrocode}
\zf@define@font@feature{Numbers}
\zf@define@feature@option{Numbers}{Monospaced}   {6} {0}{+tnum}
\zf@define@feature@option{Numbers}{Proportional} {6} {1}{+pnum}
\zf@define@feature@option{Numbers}{Lowercase}    {21}{0}{+onum}
\zf@define@feature@option{Numbers}{OldStyle}     {21}{0}{+onum}
\zf@define@feature@option{Numbers}{Uppercase}    {21}{1}{+lnum}
\zf@define@feature@option{Numbers}{Lining}       {21}{1}{+lnum}
\zf@define@feature@option{Numbers}{SlashedZero}  {14}{5}{+zero}
\zf@define@feature@option{Numbers}{NoSlashedZero}{14}{4}{-zero}
%    \end{macrocode}
%
% |luaotload| provides a custom |anum| feature for replacing Latin
% (AKA Arabic) numbers with Arabic (AKA Indic-Arabic). The same feature
% maps to Farsi (Persian) numbers if font language is Farsi.
%
%    \begin{macrocode}
\luatex_if_engine:T {
  \zf@define@feature@option{Numbers}{Arabic}{}{}{+anum}
  \zf@define@feature@option{Numbers}{Farsi} {}{}{+anum}
}
%    \end{macrocode}
%
% \subsubsection{Contextuals}
%    \begin{macrocode}
\zf@define@font@feature  {Contextuals}
\zf@define@feature@option{Contextuals}{Swash}        {} {} {+cswh}
\zf@define@feature@option{Contextuals}{NoSwash}      {} {} {-cswh}
\zf@define@feature@option{Contextuals}{Alternate}    {} {} {+calt}
\zf@define@feature@option{Contextuals}{NoAlternate}  {} {} {-calt}
\zf@define@feature@option{Contextuals}{WordInitial}  {8}{0}{+init}
\zf@define@feature@option{Contextuals}{NoWordInitial}{8}{1}{-init}
\zf@define@feature@option{Contextuals}{WordFinal}    {8}{2}{+fina}
\zf@define@feature@option{Contextuals}{NoWordFinal}  {8}{3}{-fina}
\zf@define@feature@option{Contextuals}{LineInitial}  {8}{4}{}
\zf@define@feature@option{Contextuals}{NoLineInitial}{8}{5}{}
\zf@define@feature@option{Contextuals}{LineFinal}    {8}{6}{+falt}
\zf@define@feature@option{Contextuals}{NoLineFinal}  {8}{7}{-falt}
\zf@define@feature@option{Contextuals}{Inner}        {8}{8}{+medi}
\zf@define@feature@option{Contextuals}{NoInner}      {8}{9}{-medi}
%    \end{macrocode}
%
% \subsubsection{Diacritics}
%    \begin{macrocode}
\zf@define@font@feature{Diacritics}
\zf@define@feature@option{Diacritics}{Show}        {9}{0}{}
\zf@define@feature@option{Diacritics}{Hide}        {9}{1}{}
\zf@define@feature@option{Diacritics}{Decompose}   {9}{2}{}
\zf@define@feature@option{Diacritics}{MarkToBase}  {}{}{+mark}
\zf@define@feature@option{Diacritics}{NoMarkToBase}{}{}{-mark}
\zf@define@feature@option{Diacritics}{MarkToMark}  {}{}{+mkmk}
\zf@define@feature@option{Diacritics}{NoMarkToMark}{}{}{-mkmk}
\zf@define@feature@option{Diacritics}{AboveBase}   {}{}{+abvm}
\zf@define@feature@option{Diacritics}{NoAboveBase} {}{}{-abvm}
\zf@define@feature@option{Diacritics}{BelowBase}   {}{}{+blwm}
\zf@define@feature@option{Diacritics}{NoBelowBase} {}{}{-blwm}
%    \end{macrocode}
%
% \subsubsection{Kerning}
%    \begin{macrocode}
\zf@define@font@feature{Kerning}
\zf@define@feature@option{Kerning}{Uppercase}{}{}{+cpsp}
\zf@define@feature@option{Kerning}{On}       {}{}{+kern}
\zf@define@feature@option{Kerning}{Off}      {}{}{-kern}
%\zf@define@feature@option{Kerning}{Vertical}{}{}{+vkrn}
%\zf@define@feature@option{Kerning}
%    {VerticalAlternateProportional}{}{}{+vpal}
%\zf@define@feature@option{Kerning}{VerticalAlternateHalfWidth}{}{}{+vhal}
%    \end{macrocode}
%
% \subsubsection{Vertical position}
%    \begin{macrocode}
\zf@define@font@feature{VerticalPosition}
\zf@define@feature@option{VerticalPosition}{Normal}     {10}{0}{}
\zf@define@feature@option{VerticalPosition}{Superior}   {10}{1}{+sups}
\zf@define@feature@option{VerticalPosition}{Inferior}   {10}{2}{+subs}
\zf@define@feature@option{VerticalPosition}{Ordinal}    {10}{3}{+ordn}
\zf@define@feature@option{VerticalPosition}{Numerator}  {}  {} {+numr}
\zf@define@feature@option{VerticalPosition}{Denominator}{}  {} {+dnom}
\zf@define@feature@option{VerticalPosition}{ScientificInferior}{}{}{+sinf}
%    \end{macrocode}
%
% \subsubsection{Fractions}
%    \begin{macrocode}
\zf@define@font@feature{Fractions}
\zf@define@feature@option{Fractions}{On}       {11}{1}{+frac}
\zf@define@feature@option{Fractions}{Off}      {11}{0}{-frac}
\zf@define@feature@option{Fractions}{Diagonal} {11}{2}{}
\zf@define@feature@option{Fractions}{Alternate}{}  {} {+afrc}
%    \end{macrocode}
%
% \subsubsection{Alternates and variants}
% Selected numerically because they don't have standard names. Very
% easy to process, very annoying for the user!
%
%    \begin{macrocode}
\define@key[zf]{options}{Alternate}[0]{
  \setkeys*[zf@feat]{Alternate}{#1}
  \unless\ifx\XKV@rm\@empty
    \def\XKV@tfam{Alternate}
    \fontspec_make_feature:nnn{17}{#1}{+salt=#1}
  \fi
}
%    \end{macrocode}
%
%    \begin{macrocode}
\define@key[zf]{options}{Variant}{
  \setkeys*[zf@feat]{Variant}{#1}
  \unless\ifx\XKV@rm\@empty
    \def\XKV@tfam{Variant}
    \fontspec_make_feature:nnn{18}{#1}{+ss\two@digits{#1}}
  \fi
}
\aliasfontfeature{Variant}{StylisticSet}
%    \end{macrocode}
%
% \subsubsection{Style}
%    \begin{macrocode}
\zf@define@font@feature{Style}
\zf@define@feature@option{Style}{Alternate}     {}  {} {+salt}
\zf@define@feature@option{Style}{Italic}        {32}{2}{+ital}
\zf@define@feature@option{Style}{Ruby}          {28}{2}{+ruby}
\zf@define@feature@option{Style}{Swash}         {}  {} {+swsh}
\zf@define@feature@option{Style}{Historic}      {}  {} {+hist}
\zf@define@feature@option{Style}{Display}       {19}{1}{}
\zf@define@feature@option{Style}{Engraved}      {19}{2}{}
\zf@define@feature@option{Style}{TitlingCaps}   {19}{4}{+titl}
\zf@define@feature@option{Style}{TallCaps}      {19}{5}{}
\zf@define@feature@option{Style}{HorizontalKana}{}  {} {+hkna}
\zf@define@feature@option{Style}{VerticalKana}  {}  {} {+vkna}
%    \end{macrocode}
%
% \subsubsection{CJK shape}
%    \begin{macrocode}
\zf@define@font@feature{CJKShape}
\zf@define@feature@option{CJKShape}{Traditional}{20}{0} {+trad}
\zf@define@feature@option{CJKShape}{Simplified} {20}{1} {+smpl}
\zf@define@feature@option{CJKShape}{JIS1978}    {20}{2} {+jp78}
\zf@define@feature@option{CJKShape}{JIS1983}    {20}{3} {+jp83}
\zf@define@feature@option{CJKShape}{JIS1990}    {20}{4} {+jp90}
\zf@define@feature@option{CJKShape}{Expert}     {20}{10}{+expt}
\zf@define@feature@option{CJKShape}{NLC}        {20}{13}{+nlck}
%    \end{macrocode}
%
% \subsubsection{Character width}
%    \begin{macrocode}
\zf@define@font@feature{CharacterWidth}
\zf@define@feature@option{CharacterWidth}{Proportional}{22}{0}{+pwid}
\zf@define@feature@option{CharacterWidth}{Full}{22}{1}{+fwid}
\zf@define@feature@option{CharacterWidth}{Half}{22}{2}{+hwid}
\zf@define@feature@option{CharacterWidth}{Third}{22}{3}{+twid}
\zf@define@feature@option{CharacterWidth}{Quarter}{22}{4}{+qwid}
\zf@define@feature@option{CharacterWidth}{AlternateProportional}{22}{5}{+palt}
\zf@define@feature@option{CharacterWidth}{AlternateHalf}{22}{6}{+halt}
\zf@define@feature@option{CharacterWidth}{Default}{22}{7}{}
%    \end{macrocode}
%
% \subsubsection{Annotation}
%    \begin{macrocode}
\zf@define@font@feature{Annotation}
\zf@define@feature@option{Annotation}{Off}{24}{0}{-nalt}
\zf@define@feature@option{Annotation}{On}{}{}{+nalt}
\zf@define@feature@option{Annotation}{Box}{24}{1}{}
\zf@define@feature@option{Annotation}{RoundedBox}{24}{2}{}
\zf@define@feature@option{Annotation}{Circle}{24}{3}{}
\zf@define@feature@option{Annotation}{BlackCircle}{24}{4}{}
\zf@define@feature@option{Annotation}{Parenthesis}{24}{5}{}
\zf@define@feature@option{Annotation}{Period}{24}{6}{}
\zf@define@feature@option{Annotation}{RomanNumerals}{24}{7}{}
\zf@define@feature@option{Annotation}{Diamond}{24}{8}{}
\zf@define@feature@option{Annotation}{BlackSquare}{24}{9}{}
\zf@define@feature@option{Annotation}{BlackRoundSquare}{24}{10}{}
\zf@define@feature@option{Annotation}{DoubleCircle}{24}{11}{}
%    \end{macrocode}
%
%
% \subsubsection{Vertical}
%    \begin{macrocode}
\zf@define@font@feature{Vertical}
\define@key[zf@feat]{Vertical}{RotatedGlyphs}[]{
  \ifzf@icu
    \fontspec_make_feature:nnn{}{}{+vrt2}
    \zf@update@family{+vert}
    \zf@update@ff{vertical}
  \else
    \zf@update@family{+vert}
    \zf@update@ff{vertical}
  \fi
}
%    \end{macrocode}
%
% \subsubsection{Script}
%    \begin{macrocode}
\newfontscript{Arabic}{arab}            \newfontscript{Armenian}{armn}
\newfontscript{Balinese}{bali}          \newfontscript{Bengali}{beng}
\newfontscript{Bopomofo}{bopo}          \newfontscript{Braille}{brai}
\newfontscript{Buginese}{bugi}          \newfontscript{Buhid}{buhd}
\newfontscript{Byzantine~Music}{byzm} \newfontscript{Canadian~Syllabics}{cans}
\newfontscript{Cherokee}{cher}
\newfontscript{CJK~Ideographic}{hani}   \newfontscript{Coptic}{copt}
\newfontscript{Cypriot~Syllabary}{cprt} \newfontscript{Cyrillic}{cyrl}
\newfontscript{Default}{DFLT}           \newfontscript{Deseret}{dsrt}
\newfontscript{Devanagari}{deva}        \newfontscript{Ethiopic}{ethi}
\newfontscript{Georgian}{geor}          \newfontscript{Glagolitic}{glag}
\newfontscript{Gothic}{goth}            \newfontscript{Greek}{grek}
\newfontscript{Gujarati}{gujr}          \newfontscript{Gurmukhi}{guru}
\newfontscript{Hangul~Jamo}{jamo}       \newfontscript{Hangul}{hang}
\newfontscript{Hanunoo}{hano}           \newfontscript{Hebrew}{hebr}
\newfontscript{Hiragana~and~Katakana}{kana}
\newfontscript{Javanese}{java}          \newfontscript{Kannada}{knda}
\newfontscript{Kharosthi}{khar}         \newfontscript{Khmer}{khmr}
\newfontscript{Lao}{lao~}               \newfontscript{Latin}{latn}
\newfontscript{Limbu}{limb}             \newfontscript{Linear~B}{linb}
\newfontscript{Malayalam}{mlym}         \newfontscript{Math}{math}
\newfontscript{Mongolian}{mong}
\newfontscript{Musical~Symbols}{musc}   \newfontscript{Myanmar}{mymr}
\newfontscript{N'ko}{nko~}              \newfontscript{Ogham}{ogam}
\newfontscript{Old~Italic}{ital}
\newfontscript{Old~Persian~Cuneiform}{xpeo}
\newfontscript{Oriya}{orya}             \newfontscript{Osmanya}{osma}
\newfontscript{Phags-pa}{phag}          \newfontscript{Phoenician}{phnx}
\newfontscript{Runic}{runr}             \newfontscript{Shavian}{shaw}
\newfontscript{Sinhala}{sinh}
\newfontscript{Sumero-Akkadian~Cuneiform}{xsux}
\newfontscript{Syloti~Nagri}{sylo}      \newfontscript{Syriac}{syrc}
\newfontscript{Tagalog}{tglg}           \newfontscript{Tagbanwa}{tagb}
\newfontscript{Tai~Le}{tale}            \newfontscript{Tai~Lu}{talu}
\newfontscript{Tamil}{taml}             \newfontscript{Telugu}{telu}
\newfontscript{Thaana}{thaa}            \newfontscript{Thai}{thai}
\newfontscript{Tibetan}{tibt}           \newfontscript{Tifinagh}{tfng}
\newfontscript{Ugaritic~Cuneiform}{ugar}\newfontscript{Yi}{yi~~}
%    \end{macrocode}
% For convenience:
%    \begin{macrocode}
\newfontscript{Kana}{kana}
\newfontscript{Maths}{math}
\newfontscript{CJK}{hani}
%    \end{macrocode}
%
% \subsubsection{Language}
%    \begin{macrocode}
\newfontlanguage{Abaza}{ABA}\newfontlanguage{Abkhazian}{ABK}
\newfontlanguage{Adyghe}{ADY}\newfontlanguage{Afrikaans}{AFK}
\newfontlanguage{Afar}{AFR}\newfontlanguage{Agaw}{AGW}
\newfontlanguage{Altai}{ALT}\newfontlanguage{Amharic}{AMH}
\newfontlanguage{Arabic}{ARA}\newfontlanguage{Aari}{ARI}
\newfontlanguage{Arakanese}{ARK}\newfontlanguage{Assamese}{ASM}
\newfontlanguage{Athapaskan}{ATH}\newfontlanguage{Avar}{AVR}
\newfontlanguage{Awadhi}{AWA}\newfontlanguage{Aymara}{AYM}
\newfontlanguage{Azeri}{AZE}\newfontlanguage{Badaga}{BAD}
\newfontlanguage{Baghelkhandi}{BAG}\newfontlanguage{Balkar}{BAL}
\newfontlanguage{Baule}{BAU}\newfontlanguage{Berber}{BBR}
\newfontlanguage{Bench}{BCH}\newfontlanguage{Bible~Cree}{BCR}
\newfontlanguage{Belarussian}{BEL}\newfontlanguage{Bemba}{BEM}
\newfontlanguage{Bengali}{BEN}\newfontlanguage{Bulgarian}{BGR}
\newfontlanguage{Bhili}{BHI}\newfontlanguage{Bhojpuri}{BHO}
\newfontlanguage{Bikol}{BIK}\newfontlanguage{Bilen}{BIL}
\newfontlanguage{Blackfoot}{BKF}\newfontlanguage{Balochi}{BLI}
\newfontlanguage{Balante}{BLN}\newfontlanguage{Balti}{BLT}
\newfontlanguage{Bambara}{BMB}\newfontlanguage{Bamileke}{BML}
\newfontlanguage{Breton}{BRE}\newfontlanguage{Brahui}{BRH}
\newfontlanguage{Braj~Bhasha}{BRI}\newfontlanguage{Burmese}{BRM}
\newfontlanguage{Bashkir}{BSH}\newfontlanguage{Beti}{BTI}
\newfontlanguage{Catalan}{CAT}\newfontlanguage{Cebuano}{CEB}
\newfontlanguage{Chechen}{CHE}\newfontlanguage{Chaha~Gurage}{CHG}
\newfontlanguage{Chattisgarhi}{CHH}\newfontlanguage{Chichewa}{CHI}
\newfontlanguage{Chukchi}{CHK}\newfontlanguage{Chipewyan}{CHP}
\newfontlanguage{Cherokee}{CHR}\newfontlanguage{Chuvash}{CHU}
\newfontlanguage{Comorian}{CMR}\newfontlanguage{Coptic}{COP}
\newfontlanguage{Cree}{CRE}\newfontlanguage{Carrier}{CRR}
\newfontlanguage{Crimean~Tatar}{CRT}\newfontlanguage{Church~Slavonic}{CSL}
\newfontlanguage{Czech}{CSY}\newfontlanguage{Danish}{DAN}
\newfontlanguage{Dargwa}{DAR}\newfontlanguage{Woods~Cree}{DCR}
\newfontlanguage{German}{DEU}
\newfontlanguage{Dogri}{DGR}\newfontlanguage{Divehi}{DIV}
\newfontlanguage{Djerma}{DJR}\newfontlanguage{Dangme}{DNG}
\newfontlanguage{Dinka}{DNK}\newfontlanguage{Dungan}{DUN}
\newfontlanguage{Dzongkha}{DZN}\newfontlanguage{Ebira}{EBI}
\newfontlanguage{Eastern~Cree}{ECR}\newfontlanguage{Edo}{EDO}
\newfontlanguage{Efik}{EFI}\newfontlanguage{Greek}{ELL}
\newfontlanguage{English}{ENG}\newfontlanguage{Erzya}{ERZ}
\newfontlanguage{Spanish}{ESP}\newfontlanguage{Estonian}{ETI}
\newfontlanguage{Basque}{EUQ}\newfontlanguage{Evenki}{EVK}
\newfontlanguage{Even}{EVN}\newfontlanguage{Ewe}{EWE}
\newfontlanguage{French~Antillean}{FAN}\newfontlanguage{Farsi}{FAR}
\newfontlanguage{Finnish}{FIN}\newfontlanguage{Fijian}{FJI}
\newfontlanguage{Flemish}{FLE}\newfontlanguage{Forest~Nenets}{FNE}
\newfontlanguage{Fon}{FON}\newfontlanguage{Faroese}{FOS}
\newfontlanguage{French}{FRA}\newfontlanguage{Frisian}{FRI}
\newfontlanguage{Friulian}{FRL}\newfontlanguage{Futa}{FTA}
\newfontlanguage{Fulani}{FUL}\newfontlanguage{Ga}{GAD}
\newfontlanguage{Gaelic}{GAE}\newfontlanguage{Gagauz}{GAG}
\newfontlanguage{Galician}{GAL}\newfontlanguage{Garshuni}{GAR}
\newfontlanguage{Garhwali}{GAW}\newfontlanguage{Ge'ez}{GEZ}
\newfontlanguage{Gilyak}{GIL}\newfontlanguage{Gumuz}{GMZ}
\newfontlanguage{Gondi}{GON}\newfontlanguage{Greenlandic}{GRN}
\newfontlanguage{Garo}{GRO}\newfontlanguage{Guarani}{GUA}
\newfontlanguage{Gujarati}{GUJ}\newfontlanguage{Haitian}{HAI}
\newfontlanguage{Halam}{HAL}\newfontlanguage{Harauti}{HAR}
\newfontlanguage{Hausa}{HAU}\newfontlanguage{Hawaiin}{HAW}
\newfontlanguage{Hammer-Banna}{HBN}\newfontlanguage{Hiligaynon}{HIL}
\newfontlanguage{Hindi}{HIN}\newfontlanguage{High~Mari}{HMA}
\newfontlanguage{Hindko}{HND}\newfontlanguage{Ho}{HO}
\newfontlanguage{Harari}{HRI}\newfontlanguage{Croatian}{HRV}
\newfontlanguage{Hungarian}{HUN}\newfontlanguage{Armenian}{HYE}
\newfontlanguage{Igbo}{IBO}\newfontlanguage{Ijo}{IJO}
\newfontlanguage{Ilokano}{ILO}\newfontlanguage{Indonesian}{IND}
\newfontlanguage{Ingush}{ING}\newfontlanguage{Inuktitut}{INU}
\newfontlanguage{Irish}{IRI}\newfontlanguage{Irish~Traditional}{IRT}
\newfontlanguage{Icelandic}{ISL}\newfontlanguage{Inari~Sami}{ISM}
\newfontlanguage{Italian}{ITA}\newfontlanguage{Hebrew}{IWR}
\newfontlanguage{Javanese}{JAV}\newfontlanguage{Yiddish}{JII}
\newfontlanguage{Japanese}{JAN}\newfontlanguage{Judezmo}{JUD}
\newfontlanguage{Jula}{JUL}\newfontlanguage{Kabardian}{KAB}
\newfontlanguage{Kachchi}{KAC}\newfontlanguage{Kalenjin}{KAL}
\newfontlanguage{Kannada}{KAN}\newfontlanguage{Karachay}{KAR}
\newfontlanguage{Georgian}{KAT}\newfontlanguage{Kazakh}{KAZ}
\newfontlanguage{Kebena}{KEB}\newfontlanguage{Khutsuri~Georgian}{KGE}
\newfontlanguage{Khakass}{KHA}\newfontlanguage{Khanty-Kazim}{KHK}
\newfontlanguage{Khmer}{KHM}\newfontlanguage{Khanty-Shurishkar}{KHS}
\newfontlanguage{Khanty-Vakhi}{KHV}\newfontlanguage{Khowar}{KHW}
\newfontlanguage{Kikuyu}{KIK}\newfontlanguage{Kirghiz}{KIR}
\newfontlanguage{Kisii}{KIS}\newfontlanguage{Kokni}{KKN}
\newfontlanguage{Kalmyk}{KLM}\newfontlanguage{Kamba}{KMB}
\newfontlanguage{Kumaoni}{KMN}\newfontlanguage{Komo}{KMO}
\newfontlanguage{Komso}{KMS}\newfontlanguage{Kanuri}{KNR}
\newfontlanguage{Kodagu}{KOD}\newfontlanguage{Korean~Old~Hangul}{KOH}
\newfontlanguage{Konkani}{KOK}\newfontlanguage{Kikongo}{KON}
\newfontlanguage{Komi-Permyak}{KOP}\newfontlanguage{Korean}{KOR}
\newfontlanguage{Komi-Zyrian}{KOZ}\newfontlanguage{Kpelle}{KPL}
\newfontlanguage{Krio}{KRI}\newfontlanguage{Karakalpak}{KRK}
\newfontlanguage{Karelian}{KRL}\newfontlanguage{Karaim}{KRM}
\newfontlanguage{Karen}{KRN}\newfontlanguage{Koorete}{KRT}
\newfontlanguage{Kashmiri}{KSH}\newfontlanguage{Khasi}{KSI}
\newfontlanguage{Kildin~Sami}{KSM}\newfontlanguage{Kui}{KUI}
\newfontlanguage{Kulvi}{KUL}\newfontlanguage{Kumyk}{KUM}
\newfontlanguage{Kurdish}{KUR}\newfontlanguage{Kurukh}{KUU}
\newfontlanguage{Kuy}{KUY}\newfontlanguage{Koryak}{KYK}
\newfontlanguage{Ladin}{LAD}\newfontlanguage{Lahuli}{LAH}
\newfontlanguage{Lak}{LAK}\newfontlanguage{Lambani}{LAM}
\newfontlanguage{Lao}{LAO}\newfontlanguage{Latin}{LAT}
\newfontlanguage{Laz}{LAZ}\newfontlanguage{L-Cree}{LCR}
\newfontlanguage{Ladakhi}{LDK}\newfontlanguage{Lezgi}{LEZ}
\newfontlanguage{Lingala}{LIN}\newfontlanguage{Low~Mari}{LMA}
\newfontlanguage{Limbu}{LMB}\newfontlanguage{Lomwe}{LMW}
\newfontlanguage{Lower~Sorbian}{LSB}\newfontlanguage{Lule~Sami}{LSM}
\newfontlanguage{Lithuanian}{LTH}\newfontlanguage{Luba}{LUB}
\newfontlanguage{Luganda}{LUG}\newfontlanguage{Luhya}{LUH}
\newfontlanguage{Luo}{LUO}\newfontlanguage{Latvian}{LVI}
\newfontlanguage{Majang}{MAJ}\newfontlanguage{Makua}{MAK}
\newfontlanguage{Malayalam~Traditional}{MAL}\newfontlanguage{Mansi}{MAN}
\newfontlanguage{Marathi}{MAR}\newfontlanguage{Marwari}{MAW}
\newfontlanguage{Mbundu}{MBN}\newfontlanguage{Manchu}{MCH}
\newfontlanguage{Moose~Cree}{MCR}\newfontlanguage{Mende}{MDE}
\newfontlanguage{Me'en}{MEN}\newfontlanguage{Mizo}{MIZ}
\newfontlanguage{Macedonian}{MKD}\newfontlanguage{Male}{MLE}
\newfontlanguage{Malagasy}{MLG}\newfontlanguage{Malinke}{MLN}
\newfontlanguage{Malayalam~Reformed}{MLR}\newfontlanguage{Malay}{MLY}
\newfontlanguage{Mandinka}{MND}\newfontlanguage{Mongolian}{MNG}
\newfontlanguage{Manipuri}{MNI}\newfontlanguage{Maninka}{MNK}
\newfontlanguage{Manx~Gaelic}{MNX}\newfontlanguage{Moksha}{MOK}
\newfontlanguage{Moldavian}{MOL}\newfontlanguage{Mon}{MON}
\newfontlanguage{Moroccan}{MOR}\newfontlanguage{Maori}{MRI}
\newfontlanguage{Maithili}{MTH}\newfontlanguage{Maltese}{MTS}
\newfontlanguage{Mundari}{MUN}\newfontlanguage{Naga-Assamese}{NAG}
\newfontlanguage{Nanai}{NAN}\newfontlanguage{Naskapi}{NAS}
\newfontlanguage{N-Cree}{NCR}\newfontlanguage{Ndebele}{NDB}
\newfontlanguage{Ndonga}{NDG}\newfontlanguage{Nepali}{NEP}
\newfontlanguage{Newari}{NEW}\newfontlanguage{Nagari}{NGR}
\newfontlanguage{Norway~House~Cree}{NHC}\newfontlanguage{Nisi}{NIS}
\newfontlanguage{Niuean}{NIU}\newfontlanguage{Nkole}{NKL}
\newfontlanguage{N'ko}{NKO}\newfontlanguage{Dutch}{NLD}
\newfontlanguage{Nogai}{NOG}\newfontlanguage{Norwegian}{NOR}
\newfontlanguage{Northern~Sami}{NSM}\newfontlanguage{Northern~Tai}{NTA}
\newfontlanguage{Esperanto}{NTO}\newfontlanguage{Nynorsk}{NYN}
\newfontlanguage{Oji-Cree}{OCR}\newfontlanguage{Ojibway}{OJB}
\newfontlanguage{Oriya}{ORI}\newfontlanguage{Oromo}{ORO}
\newfontlanguage{Ossetian}{OSS}\newfontlanguage{Palestinian~Aramaic}{PAA}
\newfontlanguage{Pali}{PAL}\newfontlanguage{Punjabi}{PAN}
\newfontlanguage{Palpa}{PAP}\newfontlanguage{Pashto}{PAS}
\newfontlanguage{Polytonic~Greek}{PGR}\newfontlanguage{Pilipino}{PIL}
\newfontlanguage{Palaung}{PLG}\newfontlanguage{Polish}{PLK}
\newfontlanguage{Provencal}{PRO}\newfontlanguage{Portuguese}{PTG}
\newfontlanguage{Chin}{QIN}\newfontlanguage{Rajasthani}{RAJ}
\newfontlanguage{R-Cree}{RCR}\newfontlanguage{Russian~Buriat}{RBU}
\newfontlanguage{Riang}{RIA}\newfontlanguage{Rhaeto-Romanic}{RMS}
\newfontlanguage{Romanian}{ROM}\newfontlanguage{Romany}{ROY}
\newfontlanguage{Rusyn}{RSY}\newfontlanguage{Ruanda}{RUA}
\newfontlanguage{Russian}{RUS}\newfontlanguage{Sadri}{SAD}
\newfontlanguage{Sanskrit}{SAN}\newfontlanguage{Santali}{SAT}
\newfontlanguage{Sayisi}{SAY}\newfontlanguage{Sekota}{SEK}
\newfontlanguage{Selkup}{SEL}\newfontlanguage{Sango}{SGO}
\newfontlanguage{Shan}{SHN}\newfontlanguage{Sibe}{SIB}
\newfontlanguage{Sidamo}{SID}\newfontlanguage{Silte~Gurage}{SIG}
\newfontlanguage{Skolt~Sami}{SKS}\newfontlanguage{Slovak}{SKY}
\newfontlanguage{Slavey}{SLA}\newfontlanguage{Slovenian}{SLV}
\newfontlanguage{Somali}{SML}\newfontlanguage{Samoan}{SMO}
\newfontlanguage{Sena}{SNA}\newfontlanguage{Sindhi}{SND}
\newfontlanguage{Sinhalese}{SNH}\newfontlanguage{Soninke}{SNK}
\newfontlanguage{Sodo~Gurage}{SOG}\newfontlanguage{Sotho}{SOT}
\newfontlanguage{Albanian}{SQI}\newfontlanguage{Serbian}{SRB}
\newfontlanguage{Saraiki}{SRK}\newfontlanguage{Serer}{SRR}
\newfontlanguage{South~Slavey}{SSL}\newfontlanguage{Southern~Sami}{SSM}
\newfontlanguage{Suri}{SUR}\newfontlanguage{Svan}{SVA}
\newfontlanguage{Swedish}{SVE}\newfontlanguage{Swadaya~Aramaic}{SWA}
\newfontlanguage{Swahili}{SWK}\newfontlanguage{Swazi}{SWZ}
\newfontlanguage{Sutu}{SXT}\newfontlanguage{Syriac}{SYR}
\newfontlanguage{Tabasaran}{TAB}\newfontlanguage{Tajiki}{TAJ}
\newfontlanguage{Tamil}{TAM}\newfontlanguage{Tatar}{TAT}
\newfontlanguage{TH-Cree}{TCR}\newfontlanguage{Telugu}{TEL}
\newfontlanguage{Tongan}{TGN}\newfontlanguage{Tigre}{TGR}
\newfontlanguage{Tigrinya}{TGY}\newfontlanguage{Thai}{THA}
\newfontlanguage{Tahitian}{THT}\newfontlanguage{Tibetan}{TIB}
\newfontlanguage{Turkmen}{TKM}\newfontlanguage{Temne}{TMN}
\newfontlanguage{Tswana}{TNA}\newfontlanguage{Tundra~Nenets}{TNE}
\newfontlanguage{Tonga}{TNG}\newfontlanguage{Todo}{TOD}
\newfontlanguage{Tsonga}{TSG}\newfontlanguage{Turoyo~Aramaic}{TUA}
\newfontlanguage{Tulu}{TUL}\newfontlanguage{Tuvin}{TUV}
\newfontlanguage{Twi}{TWI}\newfontlanguage{Udmurt}{UDM}
\newfontlanguage{Ukrainian}{UKR}\newfontlanguage{Urdu}{URD}
\newfontlanguage{Upper~Sorbian}{USB}\newfontlanguage{Uyghur}{UYG}
\newfontlanguage{Uzbek}{UZB}\newfontlanguage{Venda}{VEN}
\newfontlanguage{Vietnamese}{VIT}\newfontlanguage{Wa}{WA}
\newfontlanguage{Wagdi}{WAG}\newfontlanguage{West-Cree}{WCR}
\newfontlanguage{Welsh}{WEL}\newfontlanguage{Wolof}{WLF}
\newfontlanguage{Tai~Lue}{XBD}\newfontlanguage{Xhosa}{XHS}
\newfontlanguage{Yakut}{YAK}\newfontlanguage{Yoruba}{YBA}
\newfontlanguage{Y-Cree}{YCR}\newfontlanguage{Yi~Classic}{YIC}
\newfontlanguage{Yi~Modern}{YIM}\newfontlanguage{Chinese~Hong~Kong}{ZHH}
\newfontlanguage{Chinese~Phonetic}{ZHP}\newfontlanguage{Chinese~Simplified}{ZHS}
\newfontlanguage{Chinese~Traditional}{ZHT}\newfontlanguage{Zande}{ZND}
\newfontlanguage{Zulu}{ZUL}
%    \end{macrocode}
%
% \paragraph{Turkish} Turns out that many fonts use `TUR' as their Turkish language tag rather than the specified `TRK'. So we check for both:
%    \begin{macrocode}
\define@key[zf@feat]{Lang}{Turkish}[]{
  \fontspec_check_lang:nTF {TRK} {
    \c@zf@language\l_fontspec_strnum_int\relax
    \zf@update@family{+lang=Turkish}
    \tl_set:Nn \l_fontspec_lang_tl {TRK}
  }{
    \fontspec_check_lang:nTF {TUR} {
      \c@zf@language\l_fontspec_strnum_int\relax
      \zf@update@family{+lang=Turkish}
      \tl_set:Nn \l_fontspec_lang_tl {TUR}
    }{
      \fontspec_warning:nx {language-not-exist} {#1}
    }
  }
}
%    \end{macrocode}
%
% \paragraph{Default}
%
%    \begin{macrocode}
\define@key[zf@feat]{Lang}{Default}[]{
  \zf@update@family{+lang=dflt}
  \tl_set:Nn \l_fontspec_lang_tl {DFLT}
  \c@zf@language=0\relax
}
%    \end{macrocode}
%
% \subsubsection{Raw feature string}
% This allows savvy \XeTeX-ers to input font features manually if they have
% already memorised the OpenType abbreviations and don't mind not having error checking.
%    \begin{macrocode}
\define@key[zf]{options}{RawFeature}{
  \zf@update@family{+Raw:#1}
  \zf@update@ff{#1}
}
%    \end{macrocode}
%
%
%
% \subsection{Italic small caps} \label{sec:sishape}
% The following code for utilising italic small caps sensibly is
% inspired from Philip Lehman's \textit{The Font Installation
%   Guide}. Note that |\upshape| needs to be used \emph{twice} to get
% from italic small caps to regular upright (it always goes to small
% caps, then regular upright).
% \begin{macro}{\sishape}
% \begin{macro}{\textsi}
%     First, the commands for actually selecting italic small caps are
%     defined. I use |si| as the NFSS shape for italic small caps, but
%     I have seen |itsc| and |slsc| also used. |\sidefault| may be
%     redefined to one of these if required for compatibility.
%    \begin{macrocode}
\providecommand*{\sidefault}{si}
\DeclareRobustCommand{\sishape}{
  \not@math@alphabet\sishape\relax
  \fontshape\sidefault\selectfont
}
\DeclareTextFontCommand{\textsi}{\sishape}
%    \end{macrocode}
% \end{macro} \end{macro}
% \begin{macro}{\zf@merge@shape}
%   This is the macro which enables the overload on the |\..shape|
%   commands. It takes three such arguments. In essence, the macro
%   selects the first argument, unless the second argument is already
%   selected, in which case it selects the third.
%    \begin{macrocode}
\newcommand*{\zf@merge@shape}[3]{
  \edef\@tempa{#1}
  \edef\@tempb{#2}
  \ifx\f@shape\@tempb
    \ifcsname\f@encoding/\f@family/\f@series/#3\endcsname
      \edef\@tempa{#3}
    \fi
  \fi
  \fontshape{\@tempa}\selectfont
}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\itshape} \begin{macro}{\scshape} \begin{macro}{\upshape}
%       Here the original |\..shape| commands are redefined to use the
%       merge shape macro.
%    \begin{macrocode}
\DeclareRobustCommand \itshape {
  \not@math@alphabet\itshape\mathit
  \zf@merge@shape\itdefault\scdefault\sidefault
}
\DeclareRobustCommand \slshape {
  \not@math@alphabet\slshape\relax
  \zf@merge@shape\sldefault\scdefault\sidefault
}
\DeclareRobustCommand \scshape {
  \not@math@alphabet\scshape\relax
  \zf@merge@shape\scdefault\itdefault\sidefault
}
\DeclareRobustCommand \upshape {
  \not@math@alphabet\upshape\relax
  \zf@merge@shape\updefault\sidefault\scdefault
}
%    \end{macrocode}
% \end{macro} \end{macro} \end{macro}
%
% \subsection{Selecting maths fonts}
% Here, the fonts used in math mode are redefined to correspond to the
% default roman, sans serif and typewriter fonts. Unfortunately, you
% can only define maths fonts in the preamble, otherwise I'd run this
% code whenever \cs{setmainfont} and friends was run.
%
% \begin{macro}{\zf@math}
% Everything here is performed \cs{AtBeginDocument} in order to
% overwrite \pkg{euler}'s attempt. This means \pkg{fontspec} must be
% loaded \emph{after} \pkg{euler}. We set up a conditional to return
% an error if this rule is violated.
%
% Since every maths setup is slightly different, we also take
% different paths for defining various math glyphs depending which
% maths font package has been loaded.
%
%    \begin{macrocode}
\@ifpackageloaded{euler}{\zf@package@euler@loadedtrue}
                        {\zf@package@euler@loadedfalse}
\def\zf@math{
  \let\zf@font@warning\@font@warning
  \let\@font@warning\@font@info
  \@ifpackageloaded{euler}{
    \ifzf@package@euler@loaded
      \zf@math@eulertrue
    \else
      \fontspec_error:n {euler-too-late}
    \fi
  }{}
  \@ifpackageloaded{lucbmath}{\zf@math@lucidatrue}{}
  \@ifpackageloaded{lucidabr}{\zf@math@lucidatrue}{}
  \@ifpackageloaded{lucimatx}{\zf@math@lucidatrue}{}
%    \end{macrocode}
% Knuth's CM fonts fonts are all squashed together, combining letters,
% accents, text symbols and maths symbols all in the one font,
% \texttt{cmr}, plus other things in other fonts. Because we are
% changing the roman font in the document, we need to redefine all of
% the maths glyphs in \LaTeX's \texttt{operators} maths font to still
% go back to the legacy \texttt{cmr} font for all these random glyphs,
% unless a separate maths font package has been loaded instead.
%
% In every case, the maths accents are always taken from the
% \texttt{operators} font, which is generally the main text
% font. (Actually, there is a \cmd\hat\ accent in
% \texttt{EulerFractur}, but it's \emph{ugly}. So I ignore it. Sorry
% if this causes inconvenience.)
%    \begin{macrocode}
  \DeclareSymbolFont{legacymaths}{OT1}{cmr}{m}{n}
  \SetSymbolFont{legacymaths}{bold}{OT1}{cmr}{bx}{n}
  \DeclareMathAccent{\acute}   {\mathalpha}{legacymaths}{19}
  \DeclareMathAccent{\grave}   {\mathalpha}{legacymaths}{18}
  \DeclareMathAccent{\ddot}    {\mathalpha}{legacymaths}{127}
  \DeclareMathAccent{\tilde}   {\mathalpha}{legacymaths}{126}
  \DeclareMathAccent{\bar}     {\mathalpha}{legacymaths}{22}
  \DeclareMathAccent{\breve}   {\mathalpha}{legacymaths}{21}
  \DeclareMathAccent{\check}   {\mathalpha}{legacymaths}{20}
  \DeclareMathAccent{\hat}     {\mathalpha}{legacymaths}{94} % too bad, euler
  \DeclareMathAccent{\dot}     {\mathalpha}{legacymaths}{95}
  \DeclareMathAccent{\mathring}{\mathalpha}{legacymaths}{23}
%    \end{macrocode}
% \paragraph{\cmd\colon: what's going on?} Okay, so \verb":" and \cmd\colon\ in maths mode are defined in a few places, so I need to work out what does what. Respectively, we have:
% \begin{Verbatim}
% % fontmath.ltx:
% \DeclareMathSymbol{\colon}{\mathpunct}{operators}{"3A}
% \DeclareMathSymbol{:}{\mathrel}{operators}{"3A}
%
% % amsmath.sty:
% \renewcommand{\colon}{\nobreak\mskip2mu\mathpunct{}\nonscript
%  \mkern-\thinmuskip{:}\mskip6muplus1mu\relax}
%
% % euler.sty:
% \DeclareMathSymbol{:}\mathrel  {EulerFraktur}{"3A}
%
% % lucbmath.sty:
% \DeclareMathSymbol{\@tempb}{\mathpunct}{operators}{58}
% \ifx\colon\@tempb
%   \DeclareMathSymbol{\colon}{\mathpunct}{operators}{58}
% \fi
% \DeclareMathSymbol{:}{\mathrel}{operators}{58}
% \end{Verbatim}
% ($\mathrm{3A_{16}}=\mathrm{58_{10}}$) So I think, based on this summary, that it is fair to tell \pkg{fontspec} to `replace' the operators font with legacymaths for this symbol, except when \pkg{amsmath} is loaded since we want to keep its definition.
%
%
%    \begin{macrocode}
  \begingroup
    \mathchardef\@tempa="603A \relax
    \let\next\egroup
    \ifx\colon\@tempa
      \DeclareMathSymbol{\colon}{\mathpunct}{legacymaths}{58}
    \fi
  \endgroup
%    \end{macrocode}
% The following symbols are only defined specifically in \pkg{euler}, so skip them
% if that package is loaded.
%    \begin{macrocode}
  \ifzf@math@euler\else
    \DeclareMathSymbol{!}{\mathclose}{legacymaths}{33}
    \DeclareMathSymbol{:}{\mathrel}  {legacymaths}{58}
    \DeclareMathSymbol{;}{\mathpunct}{legacymaths}{59}
    \DeclareMathSymbol{?}{\mathclose}{legacymaths}{63}
%    \end{macrocode}
% And these ones are defined both in \pkg{euler} and \pkg{lucbmath},
% so we only need to run this code if no extra maths package has been
% loaded.
%    \begin{macrocode}
    \ifzf@math@lucida\else
      \DeclareMathSymbol{0}{\mathalpha}{legacymaths}{`0}
      \DeclareMathSymbol{1}{\mathalpha}{legacymaths}{`1}
      \DeclareMathSymbol{2}{\mathalpha}{legacymaths}{`2}
      \DeclareMathSymbol{3}{\mathalpha}{legacymaths}{`3}
      \DeclareMathSymbol{4}{\mathalpha}{legacymaths}{`4}
      \DeclareMathSymbol{5}{\mathalpha}{legacymaths}{`5}
      \DeclareMathSymbol{6}{\mathalpha}{legacymaths}{`6}
      \DeclareMathSymbol{7}{\mathalpha}{legacymaths}{`7}
      \DeclareMathSymbol{8}{\mathalpha}{legacymaths}{`8}
      \DeclareMathSymbol{9}{\mathalpha}{legacymaths}{`9}
      \DeclareMathSymbol{\Gamma}{\mathalpha}{legacymaths}{0}
      \DeclareMathSymbol{\Delta}{\mathalpha}{legacymaths}{1}
      \DeclareMathSymbol{\Theta}{\mathalpha}{legacymaths}{2}
      \DeclareMathSymbol{\Lambda}{\mathalpha}{legacymaths}{3}
      \DeclareMathSymbol{\Xi}{\mathalpha}{legacymaths}{4}
      \DeclareMathSymbol{\Pi}{\mathalpha}{legacymaths}{5}
      \DeclareMathSymbol{\Sigma}{\mathalpha}{legacymaths}{6}
      \DeclareMathSymbol{\Upsilon}{\mathalpha}{legacymaths}{7}
      \DeclareMathSymbol{\Phi}{\mathalpha}{legacymaths}{8}
      \DeclareMathSymbol{\Psi}{\mathalpha}{legacymaths}{9}
      \DeclareMathSymbol{\Omega}{\mathalpha}{legacymaths}{10}
      \DeclareMathSymbol{+}{\mathbin}{legacymaths}{43}
      \DeclareMathSymbol{=}{\mathrel}{legacymaths}{61}
      \DeclareMathDelimiter{(}{\mathopen} {legacymaths}{40}{largesymbols}{0}
      \DeclareMathDelimiter{)}{\mathclose}{legacymaths}{41}{largesymbols}{1}
      \DeclareMathDelimiter{[}{\mathopen} {legacymaths}{91}{largesymbols}{2}
      \DeclareMathDelimiter{]}{\mathclose}{legacymaths}{93}{largesymbols}{3}
      \DeclareMathDelimiter{/}{\mathord}{legacymaths}{47}{largesymbols}{14}
      \DeclareMathSymbol{\mathdollar}{\mathord}{legacymaths}{36}
    \fi
  \fi
%    \end{macrocode}
% Finally, we change the font definitions for \cmd\mathrm\ and so
% on. These are defined using the \cmd\zf@rmmaths\ (\dots) macros,
% which default to \cmd\rmdefault\ but may be specified with the
% \cmd\setmathrm\ (\dots) commands in the preamble.
%
% Since \LaTeX\ only generally defines one level of boldness, we omit
% \cmd\mathbf\ in the \textsf{bold} maths series. It can be specified
% as per usual with \cmd\setboldmathrm, which stores the appropriate
% family name in \cmd\zf@rmboldmaths.
%    \begin{macrocode}
  \DeclareSymbolFont{operators}\zf@enc\zf@rmmaths\mddefault\updefault
  \SetSymbolFont{operators}{normal}\zf@enc\zf@rmmaths\mddefault\updefault
  \SetMathAlphabet\mathrm{normal}\zf@enc\zf@rmmaths\mddefault\updefault
  \SetMathAlphabet\mathit{normal}\zf@enc\zf@rmmaths\mddefault\itdefault
  \SetMathAlphabet\mathbf{normal}\zf@enc\zf@rmmaths\bfdefault\updefault
  \SetMathAlphabet\mathsf{normal}\zf@enc\zf@sfmaths\mddefault\updefault
  \SetMathAlphabet\mathtt{normal}\zf@enc\zf@ttmaths\mddefault\updefault
  \SetSymbolFont{operators}{bold}\zf@enc\zf@rmmaths\bfdefault\updefault
  \ifdefined\zf@rmboldmaths
    \SetMathAlphabet\mathrm{bold}\zf@enc\zf@rmboldmaths\mddefault\updefault
    \SetMathAlphabet\mathbf{bold}\zf@enc\zf@rmboldmaths\bfdefault\updefault
    \SetMathAlphabet\mathit{bold}\zf@enc\zf@rmboldmaths\mddefault\itdefault
  \else
    \SetMathAlphabet\mathrm{bold}\zf@enc\zf@rmmaths\bfdefault\updefault
    \SetMathAlphabet\mathit{bold}\zf@enc\zf@rmmaths\bfdefault\itdefault
  \fi
  \SetMathAlphabet\mathsf{bold}\zf@enc\zf@sfmaths\bfdefault\updefault
  \SetMathAlphabet\mathtt{bold}\zf@enc\zf@ttmaths\bfdefault\updefault
  \let\font@warning\zf@font@warning}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\zf@math@maybe}
% We're a little less sophisticated about not executing the \cmd\zf@maths\ macro if various other maths font packages are loaded. This list is based on the wonderful `\LaTeX Font Catalogue': \url{http://www.tug.dk/FontCatalogue/mathfonts.html}. I'm sure there are more I've missed. Do the \TeX\ Gyre fonts have maths support yet?
%
% Untested: would |\unless\ifnum\Gamma=28672\relax\@zf@mathfalse\fi| be a better test?
% This needs more cooperation with euler and lucida, I think.
%    \begin{macrocode}
\def\zf@math@maybe{
  \@ifpackageloaded{anttor}{
    \ifx\define@antt@mathversions a\@zf@mathfalse\fi}{}
  \@ifpackageloaded{arev}{\@zf@mathfalse}{}
  \@ifpackageloaded{eulervm}{\@zf@mathfalse}{}
  \@ifpackageloaded{mathdesign}{\@zf@mathfalse}{}
  \@ifpackageloaded{concmath}{\@zf@mathfalse}{}
  \@ifpackageloaded{cmbright}{\@zf@mathfalse}{}
  \@ifpackageloaded{mathesf}{\@zf@mathfalse}{}
  \@ifpackageloaded{gfsartemisia}{\@zf@mathfalse}{}
  \@ifpackageloaded{gfsneohellenic}{\@zf@mathfalse}{}
  \@ifpackageloaded{iwona}{
    \ifx\define@iwona@mathversions a\@zf@mathfalse\fi}{}
  \@ifpackageloaded{kpfonts}{\@zf@mathfalse}{}
  \@ifpackageloaded{kmath}{\@zf@mathfalse}{}
  \@ifpackageloaded{kurier}{
    \ifx\define@kurier@mathversions a\@zf@mathfalse\fi}{}
  \@ifpackageloaded{fouriernc}{\@zf@mathfalse}{}
  \@ifpackageloaded{fourier}{\@zf@mathfalse}{}
  \@ifpackageloaded{mathpazo}{\@zf@mathfalse}{}
  \@ifpackageloaded{mathptmx}{\@zf@mathfalse}{}
  \@ifpackageloaded{MinionPro}{\@zf@mathfalse}{}
  \@ifpackageloaded{unicode-math}{\@zf@mathfalse}{}
  \@ifpackageloaded{breqn}{\@zf@mathfalse}{}
  \if@zf@math
    \fontspec_info:n {setup-math}
    \zf@math
  \fi
}
\AtBeginDocument{\zf@math@maybe}
%    \end{macrocode}
% \end{macro}
%
%
% \subsection{Finishing up}
% Now we just want to set up loading the \texttt{.cfg} file, if it exists.
%    \begin{macrocode}
\if@zf@configfile
  \InputIfFileExists{fontspec.cfg}
    {\typeout{fontspec.cfg~ loaded.}}
    {\typeout{No~ fontspec.cfg~ file~ found;~ no~ configuration~ loaded.}}
\fi
%    \end{macrocode}
%
% The end! Thanks for coming.
%
% \iffalse
%</fontspec>
%<*lua>
% \fi
%
% \clearpage
% \part{fontspec.lua}
%
% First we define some metadata.
%    \begin{macrocode}
fontspec          = { }

fontspec.module   = {
    name          = "fontspec",
    version       = 2.0,
    date          = "2009/12/04",
    description   = "Advanced font selection for LuaLaTeX.",
    author        = "Khaled Hosny",
    copyright     = "Khaled Hosny",
    license       = "LPPL"
}

luatexbase.provides_module(fontspec.module)

%    \end{macrocode}
% Some utility functions
%    \begin{macrocode}

utf = unicode.utf8

function fontspec.log    (...) luatexbase.module_log    (fontspec.module.name, string.format(...)) end
function fontspec.warning(...) luatexbase.module_warning(fontspec.module.name, string.format(...)) end
function fontspec.error  (...) luatexbase.module_error  (fontspec.module.name, string.format(...)) end

function fontspec.sprint (...) tex.sprint(luatexbase.catcodetables['latex-package'], ...) end

%    \end{macrocode}
% The following functions check for exsitence of certain script, language or
% feature in a given font.
%    \begin{macrocode}

local function check_script(id, script)
    local s = string.lower(script)
    if id and id > 0 then
        local otfdata = fonts.ids[id].shared.otfdata
        if otfdata then
            local features = otfdata.luatex.features
            for i,_ in pairs(features) do
                for j,_ in pairs(features[i]) do
                    if features[i][j][s] then
                        fontspec.log("script '%s' exists in font '%s'",
                                      script, fonts.ids[id].fullname)
                        return true
                    end
                end
            end
        end
    end
end

local function check_language(id, language, script)
    local s = string.lower(script)
    local l = string.lower(language)
    if id and id > 0 then
        local otfdata = fonts.ids[id].shared.otfdata
        if otfdata then
            local features = otfdata.luatex.features
            for i,_ in pairs(features) do
                for j,_ in pairs(features[i]) do
                    if features[i][j][s] and features[i][j][s][l] then
                        fontspec.log("language '%s' for script '%s' exists in font '%s'",
                                      language, script, fonts.ids[id].fullname)
                        return true
                    end
                end
            end
        end
    end
end

local function check_feature(id, feature, language, script)
    local s = string.lower(script)
    local l = string.lower(language)
    local f = string.lower(feature:gsub("^[+-]", ""))
    if id and id > 0 then
        local otfdata = fonts.ids[id].shared.otfdata
        if otfdata then
            local features = otfdata.luatex.features
            for i,_ in pairs(features) do
                if features[i][f] and features[i][f][s] then
                    if features[i][f][s][l] == true then
                        fontspec.log("feature '%s' for language '%s' and script '%s' exists in font '%s'",
                                      feature, language, script, fonts.ids[id].fullname)
                        return true
                    end
                end
            end
        end
    end
end

%    \end{macrocode}
% This function takes a font csname (without the leading slash) and returns its
% internal font id. Since \LuaTeX~0.47, there is a built in \texttt{font.id()}
% function.
%    \begin{macrocode}

local function font_id(str)
    local id
    if tex.luatexversion >= 47 then
        id = font.id(str)
    else
        id = token.create(str)[2]
    end
    return id
end

%    \end{macrocode}
% The following are the function that get called from \TeX\ end.
%    \begin{macrocode}

local function tempswatrue()  fontspec.sprint([[\@tempswatrue]])  end
local function tempswafalse() fontspec.sprint([[\@tempswafalse]]) end

function fontspec.check_ot_script(fnt, script)
    if check_script(font_id(fnt), script) then
        tempswatrue()
    else
        tempswafalse()
    end
end

function fontspec.check_ot_lang(fnt, lang, script)
    if check_language(font_id(fnt), lang, script) then
        tempswatrue()
    else
        tempswafalse()
    end
end

function fontspec.check_ot_feat(fnt, feat, lang, script)
    for _, f in ipairs { "+trep", "+tlig", "+anum" } do
        if feat == f then
            tempswatrue()
            return
        end
    end
    if check_feature(font_id(fnt), feat, lang, script) then
        tempswatrue()
    else
        tempswafalse()
    end
end

%    \end{macrocode}
% Get font dimens for \cs{fontspec_calc_scale:n} (despite the name of this function,
% it doesn't return any arbitrary font dimen, only \cmd\dimen5 and \cmd\dimen8.)
%    \begin{macrocode}

function fontspec.get_dimen(fontdimen, csname)
    local id, h, em, pt
    if csname == "font" then
        id = font.current()
    else
        id = font_id(csname)
    end
    if fontdimen == 8 then
        h = fonts.ids[id].shared.otfdata.pfminfo.os2_capheight
    elseif fontdimen == 5 then
        h = fonts.ids[id].shared.otfdata.pfminfo.os2_xheight
    end
    em = fonts.ids[id].shared.otfdata.metadata.units_per_em
    pt = fonts.ids[id].size / 65536
    tex.sprint(string.format("%spt", (h/em)*pt))
end

function fontspec.charglyph(char, csname)
    local id, c
    if char then
        if utf.len(char) > 1 then
            c = utf.byte(utf.char(char:gsub('"', '0x')))
        else
            c = utf.byte(char)
        end

        if csname then
            id = font_id(csname)
        else
            id = font.current()
        end

        if font.fonts[id]["characters"][c] then
            return font.fonts[id]["characters"][c].index
        else
            return 0
        end
    else
        return 0
    end
end

%    \end{macrocode}
%
% \iffalse
%</lua>
% \fi
%
% \clearpage
% \part{fontspec-patches.sty}
%
% \iffalse
%<*patches>
% \fi
%
%    \begin{macrocode}
\ExplSyntaxOn
%    \end{macrocode}
%
% \subsection{Unicode footnote symbols}
%    \begin{macrocode}
\RequirePackage{fixltx2e}[2006/03/24]
%    \end{macrocode}
% \subsection{Emph}
%
% \begin{macro}{\em}
% \begin{macro}{\emph}
% \begin{macro}{\emshape}
% \begin{macro}{\eminnershape}
% Redefinition of |{\em ...}| and |\emph{...}| to use \textsc{nfss} info to detect when the inner shape should be used.
%    \begin{macrocode}
\DeclareRobustCommand \em {
  \@nomath\em
  \tl_if_eq:xxTF \f@shape \itdefault \eminnershape \emshape
}
\DeclareTextFontCommand{\emph}{\em}
\let\emshape\itshape
\let\eminnershape\upshape
%    \end{macrocode}
% \end{macro} \end{macro}
% \end{macro} \end{macro}
%
% \subsection{\cmd\-}
%
% \begin{macro}{\-}
% This macro is courtesy of Frank Mittelbach and the \LaTeXe\ source code.
%    \begin{macrocode}
\DeclareRobustCommand{\-}{%
  \discretionary{%
    \char\ifnum\hyphenchar\font<\z@
           \xlx@defaulthyphenchar
         \else
           \hyphenchar\font
         \fi}{}{}}
\def\xlx@defaulthyphenchar{`\-}
%    \end{macrocode}
% \end{macro}
%
%
% \subsection{Verbatims}
%
% Many thanks to Apostolos Syropoulos for discovering this problem and writing the  redefinion of \LaTeX's |verbatim| environment and \cs{verb*} command.
%
% \begin{macro}{\xxt@visiblespace}
% Print \unichar{2434}{Open box}, which is used to visibly display a space character.
%    \begin{macrocode}
\def\xxt@visiblespace{
  \iffontchar\font"2423
    \expandafter\textvisiblespace
  \else
    \expandafter\xxt@visiblespace@fallback
  \fi
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\xxt@visiblespace@fallback}
% If the current font doesn't have u2434, use Latin Modern Mono instead.
%    \begin{macrocode}
\def\xxt@visiblespace@fallback{
  {
    \usefont{EU1}{lmtt}{\f@series}{\f@shape}
    \textvisiblespace
  }
}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\xxt@vprintspaces}
% Helper macro to turn spaces active and print visible space instead.
%    \begin{macrocode}
\begingroup
  \catcode`\~=\active
  \gdef\xxt@vprintspaces{\catcode`\~\active\let \xxt@visiblespace}
\endgroup
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\verb}
% \begin{macro}{\verb*}
% Redefine \cmd\verb\ to use \cmd\xxt@vprintspaces.
%    \begin{macrocode}
\def\verb{
  \relax\ifmmode\hbox\else\leavevmode\null\fi
  \bgroup
    \verb@eol@error \let\do\@makeother \dospecials
    \verbatim@font\@noligs
    \@ifstar\@@sverb\@verb
}
\def\@@sverb{\xxt@vprintspaces\@sverb}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% It's better to put small things into \cmd\AtBeginDocument, so here we go:
%    \begin{macrocode}
\AtBeginDocument{
  \fontspec_patch_verbatim:
  \fontspec_patch_moreverb:
  \fontspec_patch_fancyvrb:
  \fontspec_patch_listings:
}
%    \end{macrocode}
%
% \begin{environment}{verbatim*}
% With the \pkg{verbatim} package.
%    \begin{macrocode}
\cs_set:Npn \fontspec_patch_verbatim: {
  \@ifpackageloaded{verbatim}{
    \@namedef{verbatim*}{
      \begingroup\@verbatim\xxt@vprintspaces\verbatim@start
    }
  }{
%    \end{macrocode}
% This is for vanilla LaTeX.
%    \begin{macrocode}
    \@namedef{verbatim*}{\@verbatim\xxt@vprintspaces\@sxverbatim}
  }
}
%    \end{macrocode}
% \end{environment}
%
% \begin{environment}{listingcont*}
% This is for \pkg{moreverb}.
% The main |listing*| environment inherits this definition.
%    \begin{macrocode}
\cs_set:Npn \fontspec_patch_moreverb: {
  \@ifpackageloaded{moreverb}{
    \@namedef{listingcont*}{
      \def\verbatim@processline{
        \thelisting@line \global\advance\listing@line\c_one
        \the\verbatim@line\par
      }
      \@verbatim\xxt@vprintspaces\verbatim@start
    }
  }{}}
%    \end{macrocode}
% \end{environment}
%
% \pkg{listings} and \pkg{fancvrb} make things nice and easy:
%    \begin{macrocode}
\cs_set:Npn \fontspec_patch_fancyvrb: {
  \@ifpackageloaded{fancyvrb}{
    \let\FancyVerbSpace\xxt@visiblespace
  }{}
}
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_set:Npn \fontspec_patch_listings: {
  \@ifpackageloaded{listings}{
    \let\lst@visiblespace\xxt@visiblespace
  }{}
}
%    \end{macrocode}
%
% \iffalse
%</patches>
% \fi
%
% \clearpage
% \part{fontspec.cfg}
%
% \iffalse
%<*cfg>
% \fi
%
% As an example, and to avoid upsetting people as much as possible,
% I'm populating the default \texttt{fontspec.cfg} file with
% backwards compatibility feature aliases.
%    \begin{macrocode}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% FOR BACKWARDS COMPATIBILITY WITH PREVIOUS VERSIONS %%%

% Nothing here!
% I have absolutely no idea whether backwards compatibility,
% of the sort that was previously populated here, is important
% for version 2.

%    \end{macrocode}
%
% \iffalse
%</cfg>
%<*example>
% \fi
%
% \clearpage
% \part{Example documents}
%
%    \begin{macrocode}
%<luatex>% !TEX TS-program = LuaLaTeX
%<xetex>% !TEX TS-program = XeLaTeX

\documentclass{article}

%<luatex>\usepackage{fontspec}
%<xetex>\usepackage{xltxtra}

\setmainfont[Ligatures=TeX]{TeX Gyre Pagella}
\setsansfont[Ligatures=TeX,Scale=MatchLowercase]{TeX Gyre Heros}
\setmonofont[Scale=MatchLowercase]{Inconsolata}

\frenchspacing % TeX's default is a little old-fashioned...

\begin{document}
\pagestyle{empty}

\section*{The basics of the \textsf{fontspec} package}

The \textsf{fontspec} package enables automatic font selection
for \LaTeX{} documents typeset with Xe\TeX{} or \LuaTeX.
The basic command is

{\centering \verb|\fontspec[font features]{font display name}|.\par}

The default, sans serif, and typewriter fonts may be set with the
\verb|\setmainfont|, \verb|\setsansfont| and \verb|\setmonofont|
commands, respectively, as shown in the preamble. They take the
same syntax as the \verb|\fontspec| package. All expected font
shapes are available:

\begin{center}
  {\itshape Italics and \scshape small caps\dots}\\
  {\sffamily\bfseries Bold sans serif and \itshape bold italic sans serif\dots}
\end{center}

Text fonts in maths mode are also changed (e.g., notice the cosine function in
`$\cos(n\pi)=\pm 1$') but only if the roman and sans serif fonts are set in
the preamble; \verb|\setmainfont| will not affect these maths mode fonts when
called mid-document.
Maths symbols themselves are not affected.

Notice the font features used to load the default fonts in the preamble.
The first, \verb|Ligatures=TeX|, enables regular \TeX{} ligatures like
\verb|``---''| for ``---''.
The second, \verb|Scale=MatchLowercase|, automatically scales the fonts to
the same x-height.

Please see the complete \textsf{fontspec} documentation for further
information.

\end{document}
%    \end{macrocode}
%
% \iffalse
%</example>
% \fi
%
% \clearpage
% \PrintChanges
%
% \clearpage
% \setcounter{IndexColumns}{2}
% \PrintIndex
%
% \Finale
%
% \iffalse
%<*doc-style>
%    \begin{macrocode}
\ProvidesPackage{fontspec-style}

\usepackage{booktabs,calc,color,enumitem,fancyvrb,hologo,graphicx,ifthen,url,varioref,varwidth}
\fvset{gobble=2}
\newcommand\XeTeX{\hologo{XeTeX}}
\newcommand\XeLaTeX{\hologo{XeLaTeX}}
\newcommand\LuaTeX{\hologo{LuaTeX}}
\usepackage{tgpagella,eulervm}
\usepackage{inconsolata}
\usepackage[
  bookmarks=true,
  colorlinks=true,
  linkcolor=niceblue,
  urlcolor=niceblue,
  citecolor=niceblue,
  pdftitle={The fontspec package},
  pdfsubject={Advanced font selection for XeLaTeX/LuaLaTeX},
  pdfauthor={Will Robertson},
  pdfkeywords={xetex, xelatex, luatex, lualatex, unicode, opentype, aat}
  ]{hyperref}

%% ToC
\def\@dotsep{1000}
\setcounter{tocdepth}{2}
\setlength\columnseprule{0.4pt}
\renewcommand\tableofcontents{\relax
  \begin{multicols}{2}[\section*{\contentsname}]\relax
    \@starttoc{toc}\relax
  \end{multicols}}

%% Index
\setcounter{IndexColumns}{2}
\renewenvironment{theglossary}
  {\small\list{}{}
     \item\relax
     \glossary@prologue\GlossaryParms
     \let\item\@idxitem \ignorespaces
     \def\pfill{\hspace*{\fill}}}
  {\endlist}

%% varioref definitions:
\labelformat{table}{Table~#1}
\labelformat{section}{Section~#1}
\labelformat{subsection}{Section~#1}

%% verbatim examples:
\definecolor{niceblue}{rgb}{0.1,0.2,0.8}
\newenvironment{example}
  {\VerbatimEnvironment
   \begin{VerbatimOut}{\examplefilename}}
  {\end{VerbatimOut}\relax
   \begingroup
     \color{niceblue}
     \typesetexample
   \endgroup}

\newlength\examplewidth\newlength\verbatimwidth
\newlength\exoutdent   \newlength\exverbgap
\setlength\exverbgap{1em}
\setlength\exoutdent{-0.15\textwidth}
\newsavebox\verbatimbox
\edef\examplefilename{\jobname.example}

\newcommand\typesetexample{\relax
   \begin{lrbox}{\verbatimbox}\relax
     \BVerbatimInput[fontsize=\small,firstline=\firstline,lastline=\lastline]{\examplefilename}\relax
   \end{lrbox}
   \begin{list}{}{\setlength\itemindent{0pt}
                  \setlength\leftmargin\exoutdent
                  \setlength\rightmargin{0pt}}\item
   \ifx\auxwidth\relax
     \setlength\verbatimwidth{\wd\verbatimbox}\relax
   \else
     \setlength\verbatimwidth{\auxwidth}\relax
     \let\auxwidth\relax
   \fi
%   \begin{minipage}[c]{\textwidth-\exoutdent-\verbatimwidth-\exverbgap}
%     \catcode`\%=14\centering\examplesize\input\examplefilename\relax
%   \end{minipage}\hfill
   \centering
   \begin{minipage}[c]{\verbatimwidth}
     \usebox\verbatimbox
   \end{minipage}
   \end{list}
   \global\let\examplesize\normalsize
   \gdef\firstline{1}\gdef\lastline{}\par\noindent}

\let\examplesize\normalsize
\let\auxwidth\relax
\def\firstline{1}
\def\lastline{}

\let\aatexample\example
\let\endaatexample\endexample
\let\opentypeexample\example
\let\endopentypeexample\endexample

\newcommand*\setexsize[1]{\let\examplesize#1}
\newcommand*\setverbwidth[1]{\def\auxwidth{#1}}

%% Various labelling commands:
\newcommand*\name[1]{{#1}}
\newcommand*\pkg[1]{\textsf{#1}}
\newcommand*\opt[1]{\texttt{#1}}
\newcommand*\feat[1]{\texttt{#1}}

\let\latin\textit
\def\eg{\latin{e.g.}}
\def\ie{\latin{i.e.}}
\def\Eg{\latin{E.g.}}
\def\Ie{\latin{I.e.}}
\def\etc{\@ifnextchar.{\latin{etc}}{\latin{etc.}\@}}

\newcommand\note[1]{\unskip\footnote{#1}}

\def\MacOSX{Mac~OS~X}
\def\AAT{\textsc{aat}}
\def\LuaTeX{L\kern-0.08emu\kern-0.03ema\kern-0.12em\TeX}

%% (La)TeX font-related declarations:
\linespread{1.05}      % Pagella needs more space between lines
\frenchspacing         % Remove ugly extra space after punctuation

\makeatletter
\newcounter{argument}
\g@addto@macro\endmacro{\setcounter{argument}{0}}
\newcommand*\darg[1]{%
  \stepcounter{argument}%
  \noindent{\ttfamily\char`\#\theargument~:~}#1\par}
\newcommand*\doarg[1]{%
  \stepcounter{argument}%
  \noindent{\ttfamily\makebox[0pt][r]{[}\char`\#\theargument]:~}#1\par}
\makeatother

\newcommand\unichar[2]{\textsc{\MakeLowercase{u+#1: #2}}}

\newcommand\cmdbox[1]{%
  \smallskip\par\noindent
  \fbox{\begin{varwidth}{\linewidth}
    #1%
  \end{varwidth}}%
  \smallskip
}
\def\CMD#1{\texttt{\null#1\unskip}}

\usepackage{xparse}
\NewDocumentCommand \otf {somm} {%
  \IfBooleanTF #1
  {%
    \gdef\NOTE{\par\smallskip {$\ast$ \footnotesize This feature is activated by default.}}%
    \IfNoValueTF {#2} {\gdef\offname{No#3}}{\gdef\offname{#2}}%
    \featname&#3&$\ast$&\texttt{#4}\\
    \featname&\offname&&\texttt{#4}~~{\footnotesize(\textit{deactivate})}\\
  }
  {\featname&#3&&\texttt{#4}\\}%
}
\newenvironment{features}[1]{%
  \def\NOTE{}
  \def\thisfeatname{#1}%
  \def\featname{\thisfeatname~~\texttt=~~\null\gdef\featname{}}%
  \begin{table}
    \centering
    \begin{tabular}{@{}l@{}l@{\hspace{0.5\tabcolsep}}l@{\hspace{0.5\tabcolsep}}l@{}}
    \toprule
    Feature & Option && Tag \\
    \midrule
}{
    \bottomrule
    \end{tabular}
    \NOTE
    \caption{Options for the OpenType font feature `\thisfeatname'.}
    \edef\@tempa{\noexpand\label{feat:\thisfeatname}}\@tempa
  \end{table}
}

%%%%%%%%%%%

\def \MakePrivateLetters {%
  \catcode `\@ = 11
  \catcode `\_ = 11
  \catcode `\: = 11
}

%% for LaTeX3 csnames
\catcode `\_= 11

\renewcommand\partname{Part}

%    \end{macrocode}
%</doc-style>
% \fi
\endinput