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<title>greek-fontenc.def</title>
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/*    Copying and distribution of this file, with or without modification, */
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/* :Author: Günter Milde, based on html4css1.css by David Goodger          */
/* :Id: $Id$               */
/* :Copyright: © 2015 Günter Milde.                                        */
/* :License: Released under the terms of the `2-Clause BSD license`_,      */
/*    in short:                                                            */
/*                                                                         */
/*    Copying and distribution of this file, with or without modification, */
/*    are permitted in any medium without royalty provided the copyright   */
/*    notice and this notice are preserved.                                */
/*    	     	      	     	 					   */
/*    This file is offered as-is, without any warranty.                    */
/*                                                                         */
/* .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause     */
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</head>
<body>
<div class="document" id="greek-fontenc-def">
<h1 class="title">greek-fontenc.def</h1>
<p class="subtitle" id="common-greek-font-encoding-definitions">Common Greek font encoding definitions</p>
<dl class="docinfo">
<dt class="copyright">Copyright</dt>
<dd class="copyright">© 2013 Günter Milde</dd>
<dt class="licence">Licence</dt>
<dd class="licence"><p>This work may be distributed and/or modified under the
conditions of the <a class="reference external" href="http://www.latex-project.org/lppl.txt">LaTeX Project Public License</a>, either
version 1.3 of this license or any later version.</p>
</dd>
<dt class="identification">Identification</dt>
<dd class="identification"><pre class="literal-block">\ProvidesFile{greek-fontenc.def}
[2015/08/04 v0.13.4 Common Greek font encoding definitions]</pre>
</dd>
</dl>
<div class="abstract topic">
<p class="topic-title first">Abstract</p>
<p>This file provides definitions that are shared between
font encodings providing Greek characters.</p>
</div>
<dl>
<dt>Changelog:</dt>
<dd><table class="borderless">
<colgroup>
<col style="width: 8%" />
<col style="width: 16%" />
<col style="width: 76%" />
</colgroup>
<tbody>
<tr><td><p>0.9</p></td>
<td><p>2013-07-03</p></td>
<td><p>code “outsourced” from lgrxenc.def</p></td>
</tr>
<tr><td><p>0.9.1</p></td>
<td><p>2013-07-17</p></td>
<td><p>composite definitions starting with standard accent cmds</p></td>
</tr>
<tr><td><p>0.11</p></td>
<td><p>2013-11-28</p></td>
<td><p><span class="docutils literal">\greekscript</span> TextCommand</p></td>
</tr>
<tr><td><p>0.12</p></td>
<td><p>2014-12-12</p></td>
<td><p>Remove symbol macros for breathing accents.</p></td>
</tr>
<tr><td><p>0.13</p></td>
<td><p>2015-08-04</p></td>
<td><p>No &#64;uclclist entry for ypogegrammeni/prosgegrammeni.</p></td>
</tr>
<tr><td><p>0.13.4</p></td>
<td><p>2019-07-10</p></td>
<td><p><span class="docutils literal">&#64;uclclist</span> entry for <span class="docutils literal">\prosgegrammeni</span>.</p></td>
</tr>
</tbody>
</table>
</dd>
</dl>
<div class="section" id="usage">
<h1>Usage</h1>
<p>This file is input by the font encoding definition files <a class="reference external" href="lgrenc.def.html">lgrenc.def</a>. and
<a class="reference external" href="greek-euenc.def.html">greek-euenc.def</a>.</p>
</div>
<div class="section" id="implementation">
<h1>Implementation</h1>
<div class="section" id="ensuregreek-greekscript">
<h2>ensuregreek, greekscript</h2>
<p>Provide “empty” encoding-specific definitions for <span class="docutils literal">\ensuregreek</span> and
<span class="docutils literal">\greekscript</span>. The definitions in this file make the font encoding fit
for use with the Greek script. (See <span class="docutils literal">textalpha.sty</span> for default
definitions.)</p>
<p>The <span class="docutils literal">\ensuregreek</span> macro can be used to ensure that its argument is set
in a font encoding with support for Greek. If the active font encoding
supports it, kerning between adjacent command calls (e.g.
<span class="docutils literal"><span class="pre">\ensuregreek{A}\ensuregreek{\Upsilon}</span></span>) is preserved. This allows, e.g.,
wrapping of compound Unicode character definitions.</p>
<pre class="literal-block">\ProvideTextCommand{\ensuregreek}{\LastDeclaredEncoding}[1]{#1}</pre>
<p>The <span class="docutils literal">\greekscript</span> declaration switches to a font encoding supporting
the Greek script, if required. The following definition announces the
<span class="docutils literal">\LastDeclaredEncoding</span> as Greek-supporting:</p>
<pre class="literal-block">\ProvideTextCommand{\greekscript}{\LastDeclaredEncoding}{}</pre>
</div>
<div class="section" id="aliases">
<h2>Aliases</h2>
<p>Aliases are defined via <cite>DeclareTextCommand</cite> so that up/downcasing works
without the need for additional <a class="reference internal" href="#uclclist">uclclist</a> entries.</p>
<p>Compatibility aliases for <a class="reference external" href="http://www.ctan.org/pkg/hyperref">hyperref</a>’s puenc.def:</p>
<pre class="literal-block">\DeclareTextCommand{\textstigmagreek}{\LastDeclaredEncoding}{\textstigma}
\DeclareTextCommand{\textkoppagreek}{\LastDeclaredEncoding}{\textkoppa}
\DeclareTextCommand{\textStigmagreek}{\LastDeclaredEncoding}{\textStigma}
\DeclareTextCommand{\textSampigreek}{\LastDeclaredEncoding}{\textSampi}
\DeclareTextCommand{\textsampigreek}{\LastDeclaredEncoding}{\textsampi}
\DeclareTextCommand{\textdigammagreek}{\LastDeclaredEncoding}{\textdigamma}
\DeclareTextCommand{\textDigammagreek}{\LastDeclaredEncoding}{\textDigamma}

\DeclareTextCommand{\textnumeralsigngreek}{\LastDeclaredEncoding}{\textdexiakeraia}
\DeclareTextCommand{\textnumeralsignlowergreek}{\LastDeclaredEncoding}{\textaristerikeraia}</pre>
<p>Names from <a class="reference external" href="http://www.ctan.org/pkg/babel">babel</a> and <a class="reference external" href="http://www.ctan.org/pkg/teubner">teubner</a> (do we want to define them here as alias?)</p>
<pre class="code latex literal-block"><code><span class="keyword">\DeclareTextCommand</span><span class="name builtin">{</span><span class="keyword">\anwtonos</span><span class="name builtin">}{</span><span class="keyword">\LastDeclaredEncoding</span><span class="name builtin">}{</span><span class="keyword">\textdexiakeraia</span><span class="name builtin">}</span>     <span class="comment">% ʹ
</span><span class="keyword">\DeclareTextCommand</span><span class="name builtin">{</span><span class="keyword">\katwtonos</span><span class="name builtin">}{</span><span class="keyword">\LastDeclaredEncoding</span><span class="name builtin">}{</span><span class="keyword">\textaristerikeraia</span><span class="name builtin">}</span> <span class="comment">% ͵</span></code></pre>
<p>Two Unicode code points and names for one character:</p>
<pre class="literal-block">\DeclareTextCommand{\accoxia}{\LastDeclaredEncoding}{\acctonos}
\DeclareTextCommand{\acckoronis}{\LastDeclaredEncoding}{\accpsili}</pre>
<p>Symbol macros for the breathings:</p>
<p>Moved to <span class="docutils literal">textalpha.sty</span> to avoid clashes with local definitions
of <span class="docutils literal">\&lt;</span> and <span class="docutils literal">\&gt;</span> in documents using LGR or babel-greek.
(Bugreport David Kastrup). If you want to use the short macros without
loading <cite>textalpha</cite>, you can define them in the document preamble like</p>
<pre class="code latex literal-block"><code><span class="keyword">\DeclareTextCommand</span><span class="name builtin">{</span><span class="keyword">\&lt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span><span class="keyword">\accdasia</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCommand</span><span class="name builtin">{</span><span class="keyword">\&gt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span><span class="keyword">\accpsili</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&gt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>'<span class="name builtin">}{</span><span class="keyword">\accpsilioxia</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&gt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>`<span class="name builtin">}{</span><span class="keyword">\accpsilivaria</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&gt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>~<span class="name builtin">}{</span><span class="keyword">\accpsiliperispomeni</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&lt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>'<span class="name builtin">}{</span><span class="keyword">\accdasiaoxia</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&lt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>`<span class="name builtin">}{</span><span class="keyword">\accdasiavaria</span><span class="name builtin">}</span>
<span class="keyword">\DeclareTextCompositeCommand</span><span class="name builtin">{</span><span class="keyword">\&lt;</span><span class="name builtin">}{</span>LGR<span class="name builtin">}{</span>~<span class="name builtin">}{</span><span class="keyword">\accdasiaperispomeni</span><span class="name builtin">}</span></code></pre>
<p>Or use alternative symbols for the breathings (cf. X compose
table, LCI encoding)?</p>
<pre class="code latex literal-block"><code><span class="keyword">\DeclareTextCommand</span><span class="name builtin">{</span><span class="literal string">\(</span><span class="name builtin">}{</span><span class="name variable">\LastDeclaredEncoding</span><span class="name builtin">}{</span><span class="name variable">\accdasia</span><span class="name builtin">}
</span><span class="name variable">\DeclareTextCommand</span><span class="name builtin">{</span><span class="literal string">\)</span><span class="name builtin">}{</span><span class="keyword">\LastDeclaredEncoding</span><span class="name builtin">}{</span><span class="keyword">\accpsili</span><span class="name builtin">}</span></code></pre>
</div>
<div class="section" id="composite-diacritics">
<h2>Composite diacritics</h2>
<p>Composite accents can be input as sequence of simple diacritics (in
arbitrary order) via named macro, symbol macro and “transcription
characters”, e.g. one of</p>
<pre class="code latex literal-block"><code><span class="keyword">\accdialytica\accvaria\textalpha</span>,
<span class="keyword">\&quot;\'\textalpha</span>,
<span class="keyword">\&quot;</span>'<span class="keyword">\textalpha</span>, or
<span class="keyword">\'</span>&quot;<span class="keyword">\textalpha</span>.</code></pre>
<p>Separate definitions for the supported variants of the second input token
are required as composition is based on the non-expanded input</p>
<p>The composition with simple “transcription characters” must also be defined
for the symbol macros, otherwise it fails with <span class="docutils literal">\Makeuppercase</span>.</p>
<p>For Unicode encodings (where they do not resolve to Greek named macros,
composite definitions starting with standard macros are requried:</p>
<pre class="literal-block">\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\acctonos}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{\'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{'}{\accdialytikatonos}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\accvaria}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{\`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{`}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\accperispomeni}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{\~}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\&quot;}{\LastDeclaredEncoding}{~}{\accdialytikaperispomeni}

\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\&quot;}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{&quot;}{\accdialytikatonos}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\&quot;}{\accdialytikatonos}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{&quot;}{\accdialytikatonos}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accdasia}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\&lt;}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{&lt;}{\accdasiaoxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\&lt;}{\accdasiaoxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{&lt;}{\accdasiaoxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\accpsili}{\accpsilioxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{\&gt;}{\accpsilioxia}
\DeclareTextCompositeCommand{\acctonos}{\LastDeclaredEncoding}{&gt;}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\&gt;}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{&gt;}{\accpsilioxia}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{\'}{\textquoteright}
\DeclareTextCompositeCommand{\'}{\LastDeclaredEncoding}{'}{\textquoteright}

\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\&quot;}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{&quot;}{\accdialytikavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\&quot;}{\accdialytikavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{&quot;}{\accdialytikavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accdasia}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\&lt;}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{&lt;}{\accdasiavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\&lt;}{\accdasiavaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{&lt;}{\accdasiavaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\accpsili}{\accpsilivaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{\&gt;}{\accpsilivaria}
\DeclareTextCompositeCommand{\accvaria}{\LastDeclaredEncoding}{&gt;}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\&gt;}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{&gt;}{\accpsilivaria}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{\`}{\textquoteleft}
\DeclareTextCompositeCommand{\`}{\LastDeclaredEncoding}{`}{\textquoteleft}

\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accdialytika}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\&quot;}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{&quot;}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\&quot;}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{&quot;}{\accdialytikaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accdasia}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\&lt;}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{&lt;}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\&lt;}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{&lt;}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\accpsili}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{\&gt;}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accperispomeni}{\LastDeclaredEncoding}{&gt;}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{\&gt;}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\~}{\LastDeclaredEncoding}{&gt;}{\accpsiliperispomeni}

\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\acctonos}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\'}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{'}{\accpsilioxia}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\accvaria}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\`}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{`}{\accpsilivaria}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\accperispomeni}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{\~}{\accpsiliperispomeni}
\DeclareTextCompositeCommand{\accpsili}{\LastDeclaredEncoding}{~}{\accpsiliperispomeni}

\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\acctonos}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\'}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{'}{\accdasiaoxia}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\accvaria}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\`}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{`}{\accdasiavaria}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\accperispomeni}{\accdasiaperispomeni}
\DeclareTextCompositeCommand{\accdasia}{\LastDeclaredEncoding}{\~}{\accdasiaperispomeni}</pre>
</div>
<div class="section" id="uppercase">
<span id="uclclist"></span><h2>UPPERCASE</h2>
<p>If UPPERCASE (all-caps) is generated with <span class="docutils literal">\MakeUppercase</span>, macro
substitutions in the <span class="docutils literal">\&#64;uclclist</span> apply. This can be used to drop the
diacritics (except dialytika and <a class="reference external" href="https://en.wikipedia.org/wiki/Iota_subscript">iota subscript</a>). Different conventions
exist for the <a class="reference external" href="https://opoudjis.net/unicode/unicode_adscript.html">treatment of the iota subscript with uppercase letters</a>. In
the CB Fonts, a small capital adscript iota is used.</p>
<div class="section" id="uclclist-extension">
<h3>&#64;uclclist extension</h3>
<p>Based on the <a class="reference external" href="http://www.eutypon.gr/eutypon/pdf/e2008-20/e20-a03.pdf">babel patch</a> and <span class="docutils literal">fontenc.sty</span>.</p>
<p>The definition of an auxiliary, self-restting macro makes this idempotent
(only the first use of this function will expand the <span class="docutils literal">&#64;uclclist</span>).
The second and third lines are TeX’ way of writing <span class="docutils literal">uclclist += …</span>:</p>
<pre class="literal-block">\providecommand*\update&#64;uclc&#64;with&#64;greek{%
  \expandafter\def\expandafter\&#64;uclclist\expandafter{%
    \&#64;uclclist
    \accdasia\LGR&#64;accdropped
    \accdasiaoxia\LGR&#64;hiatus
    \accdasiavaria\LGR&#64;accdropped
    \accdasiaperispomeni\LGR&#64;accdropped
    \accpsili\LGR&#64;hiatus
    \accpsilioxia\LGR&#64;hiatus
    \accpsilivaria\LGR&#64;hiatus
    \accpsiliperispomeni\LGR&#64;accdropped
    \acctonos\LGR&#64;hiatus
    \accvaria\LGR&#64;accdropped
    \accdialytikatonos\LGR&#64;accDialytika
    \accdialytikavaria\LGR&#64;accDialytika
    \accdialytikaperispomeni\LGR&#64;accDialytika
    \accperispomeni\LGR&#64;accdropped
    \LGR&#64;ypogegrammeni\prosgegrammeni
    \textalpha  \textAlpha
    \textbeta   \textBeta
    \textgamma  \textGamma
    \textdelta  \textDelta
    \textepsilon\textEpsilon
    \textzeta   \textZeta
    \texteta    \textEta
    \texttheta  \textTheta
    \textiota   \textIota
    \textkappa  \textKappa
    \textlambda \textLambda
    \textmu     \textMu
    \textnu     \textNu
    \textxi     \textXi
    \textomicron\textOmicron
    \textpi     \textPi
    \textrho    \textRho
    \textvarsigma  \textSigma
    \textsigma     \textSigma
    \textautosigma \textSigma
    \texttau    \textTau
    \textupsilon\textUpsilon
    \textphi    \textPhi
    \textchi    \textChi
    \textpsi    \textPsi
    \textomega  \textOmega
    \textqoppa     \textQoppa
    \textvarstigma \textStigma
    \textstigma    \textStigma
    \textsampi     \textSampi
    \textdigamma   \textDigamma
  }%
  \let\update&#64;uclc&#64;with&#64;greek\relax
}</pre>
<p>Expand the uclc list using the just defined macro:</p>
<pre class="literal-block">\update&#64;uclc&#64;with&#64;greek</pre>
</div>
<div class="section" id="substitution-macros">
<h3>Substitution macros</h3>
<p>Drop diacritics (The argument passing ensures that kerning is preserved)</p>
<pre class="literal-block">\DeclareTextCommand{\LGR&#64;accdropped}{\LastDeclaredEncoding}[1]{#1}</pre>
<p>Keep dialytika: Define a dummy alias so that downcasing with
<span class="docutils literal">\MakeLowercase</span> does not convert a simple dialytika to a composite
accent:</p>
<pre class="literal-block">\DeclareTextCommand{\LGR&#64;accDialytika}{\LastDeclaredEncoding}{\accdialytika}
\DeclareTextCompositeCommand{\accdialytika}{\LastDeclaredEncoding}{\LGR&#64;hiatus}{\accdialytika}</pre>
<p>Convert <span class="docutils literal">\prosgegrammeni</span> (adscript iota) to <span class="docutils literal">\ypogegrammeni</span>
(subscript iota) but not vice versa:</p>
<pre class="literal-block">\DeclareTextCommand{\LGR&#64;ypogegrammeni}{\LastDeclaredEncoding}{\ypogegrammeni}</pre>
</div>
<div class="section" id="mark-hiatus">
<h3>Mark hiatus</h3>
<p>Tonos and dasia mark a hiatus if placed on the
first vowel of a diphthong (ΑΙ, ΑΥ, ΕΙ). A dialytika must be placed on the
second vowel if they are dropped (άυλος → ΑΫΛΟΣ, μάινα → ΜΑΪΝΑ, κέικ → ΚΕΪΚ,
ἀυπνία → ΑΫΠΝΙΑ):</p>
<pre class="literal-block">\DeclareTextCommand{\LGR&#64;hiatus}{\LastDeclaredEncoding}[1]{#1}
\DeclareTextCompositeCommand{\LGR&#64;hiatus}{\LastDeclaredEncoding}{&gt;}{\LGR&#64;hiatus}
\DeclareTextCompositeCommand{\LGR&#64;hiatus}{\LastDeclaredEncoding}{&lt;}{\LGR&#64;accdropped}
\DeclareTextCompositeCommand{\LGR&#64;hiatus}{\LastDeclaredEncoding}{\textAlpha}{\LGR&#64;A&#64;hiatus}
\DeclareTextCompositeCommand{\LGR&#64;hiatus}{\LastDeclaredEncoding}{\textEpsilon}{\LGR&#64;E&#64;hiatus}</pre>
<p>The font encoding file must define the <span class="docutils literal">\LGR&#64;hiatus</span> TextCommand. See
<span class="docutils literal">lgrenc.def</span> for an example.</p>
<p>The following macro can be used to test if the next character is an Alpha or
Epsilon. As <span class="docutils literal">\&#64;ifnextchar</span> gobbles spaces the lookahead macro definition
from <span class="docutils literal">amsgen.sty</span> is used:</p>
<blockquote>
<p>This macro is a new version of LaTeX’s <span class="docutils literal">\&#64;ifnextchar</span>, macro
that does not skip over spaces.</p>
</blockquote>
<pre class="literal-block">\providecommand*{\LGR&#64;ifnextchar}[3]{%
  \let\reserved&#64;d= #1%
  \def\reserved&#64;a{#2}\def\reserved&#64;b{#3}%
  \futurelet\&#64;let&#64;token\LGR&#64;ifnch
}
\providecommand*{\LGR&#64;ifnch}{%
  \ifx\&#64;let&#64;token\reserved&#64;d \let\reserved&#64;b\reserved&#64;a \fi
  \reserved&#64;b
}</pre>
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