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ebnf.html
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<!-- Generated with ebnf version 2.3.4. See https://github.com/dryruby/ebnf. -->
<table class="grammar">
<tbody id="grammar-productions" class="ebnf">
<tr id="grammar-production-ebnf">
<td>[1]</td>
<td><code>ebnf</code></td>
<td>::=</td>
<td><code class="grammar-paren">(</code><a href="#grammar-production-declaration">declaration</a> <code class="grammar-alt">|</code> <a href="#grammar-production-rule">rule</a><code class="grammar-paren">)</code><code class="grammar-star">*</code></td>
</tr>
<tr id="grammar-production-declaration">
<td>[2]</td>
<td><code>declaration</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">@terminals</code>" <code class="grammar-alt">|</code> <a href="#grammar-production-pass">pass</a></td>
</tr>
<tr id="grammar-production-rule">
<td>[3]</td>
<td><code>rule</code></td>
<td>::=</td>
<td><a href="#grammar-production-LHS">LHS</a> <a href="#grammar-production-expression">expression</a></td>
</tr>
<tr id="grammar-production-expression">
<td>[4]</td>
<td><code>expression</code></td>
<td>::=</td>
<td><a href="#grammar-production-alt">alt</a></td>
</tr>
<tr id="grammar-production-alt">
<td>[5]</td>
<td><code>alt</code></td>
<td>::=</td>
<td><a href="#grammar-production-seq">seq</a> <code class="grammar-paren">(</code>"<code class="grammar-literal">|</code>" <a href="#grammar-production-seq">seq</a><code class="grammar-paren">)</code><code class="grammar-star">*</code></td>
</tr>
<tr id="grammar-production-seq">
<td>[6]</td>
<td><code>seq</code></td>
<td>::=</td>
<td><a href="#grammar-production-diff">diff</a><code class="grammar-plus">+</code></td>
</tr>
<tr id="grammar-production-diff">
<td>[7]</td>
<td><code>diff</code></td>
<td>::=</td>
<td><a href="#grammar-production-postfix">postfix</a> <code class="grammar-paren">(</code>"<code class="grammar-literal">-</code>" <a href="#grammar-production-postfix">postfix</a><code class="grammar-paren">)</code><code class="grammar-opt">?</code></td>
</tr>
<tr id="grammar-production-postfix">
<td>[8]</td>
<td><code>postfix</code></td>
<td>::=</td>
<td><a href="#grammar-production-primary">primary</a> <a href="#grammar-production-POSTFIX">POSTFIX</a><code class="grammar-opt">?</code></td>
</tr>
<tr id="grammar-production-primary">
<td>[9]</td>
<td><code>primary</code></td>
<td>::=</td>
<td><a href="#grammar-production-HEX">HEX</a> <code class="grammar-alt">|</code> <a href="#grammar-production-SYMBOL">SYMBOL</a> <code class="grammar-alt">|</code> <a href="#grammar-production-O_RANGE">O_RANGE</a> <code class="grammar-alt">|</code> <a href="#grammar-production-RANGE">RANGE</a> <code class="grammar-alt">|</code> <a href="#grammar-production-STRING1">STRING1</a> <code class="grammar-alt">|</code> <a href="#grammar-production-STRING2">STRING2</a> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code>"<code class="grammar-literal">(</code>" <a href="#grammar-production-expression">expression</a> "<code class="grammar-literal">)</code>"<code class="grammar-paren">)</code></td>
</tr>
<tr id="grammar-production-pass">
<td>[10]</td>
<td><code>pass</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">@pass</code>" <a href="#grammar-production-expression">expression</a></td>
</tr>
<tr id="grammar-declaration-terminals">
<td>@terminals</td>
<td><code></code></td>
<td></td>
<td><strong># Productions for terminals</strong></td>
</tr>
<tr id="grammar-production-LHS">
<td>[11]</td>
<td><code>LHS</code></td>
<td>::=</td>
<td><code class="grammar-paren">(</code>"<code class="grammar-literal">[</code>" <a href="#grammar-production-SYMBOL">SYMBOL</a> "<code class="grammar-literal">]</code>" <code class="grammar-char-escape"><abbr title="space">#x20</abbr></code><code class="grammar-plus">+</code><code class="grammar-paren">)</code><code class="grammar-opt">?</code> <a href="#grammar-production-SYMBOL">SYMBOL</a> <code class="grammar-char-escape"><abbr title="space">#x20</abbr></code><code class="grammar-star">*</code> "<code class="grammar-literal">::=</code>"</td>
</tr>
<tr id="grammar-production-SYMBOL">
<td>[12]</td>
<td><code>SYMBOL</code></td>
<td>::=</td>
<td><code class="grammar-paren">(</code><code class="grammar-brac">[</code><code class="grammar-literal">a-z</code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">A-Z</code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">0-9</code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> "<code class="grammar-literal">_</code>" <code class="grammar-alt">|</code> "<code class="grammar-literal">.</code>"<code class="grammar-paren">)</code><code class="grammar-plus">+</code></td>
</tr>
<tr id="grammar-production-HEX">
<td>[13]</td>
<td><code>HEX</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">#x</code>" <code class="grammar-paren">(</code><code class="grammar-brac">[</code><code class="grammar-literal">a-f</code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">A-F</code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">0-9</code><code class="grammar-brac">]</code><code class="grammar-paren">)</code><code class="grammar-plus">+</code></td>
</tr>
<tr id="grammar-production-RANGE">
<td>[14]</td>
<td><code>RANGE</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">[</code>" <code class="grammar-paren">(</code><code class="grammar-paren">(</code><a href="#grammar-production-R_CHAR">R_CHAR</a> "<code class="grammar-literal">-</code>" <a href="#grammar-production-R_CHAR">R_CHAR</a><code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code><a href="#grammar-production-HEX">HEX</a> "<code class="grammar-literal">-</code>" <a href="#grammar-production-HEX">HEX</a><code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <a href="#grammar-production-R_CHAR">R_CHAR</a> <code class="grammar-alt">|</code> <a href="#grammar-production-HEX">HEX</a><code class="grammar-paren">)</code><code class="grammar-plus">+</code> "<code class="grammar-literal">-</code>"<code class="grammar-opt">?</code> <code class="grammar-paren">(</code>"<code class="grammar-literal">]</code>" <code class="grammar-diff">-</code> <a href="#grammar-production-LHS">LHS</a><code class="grammar-paren">)</code></td>
</tr>
<tr id="grammar-production-O_RANGE">
<td>[15]</td>
<td><code>O_RANGE</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">[^</code>" <code class="grammar-paren">(</code><code class="grammar-paren">(</code><a href="#grammar-production-R_CHAR">R_CHAR</a> "<code class="grammar-literal">-</code>" <a href="#grammar-production-R_CHAR">R_CHAR</a><code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code><a href="#grammar-production-HEX">HEX</a> "<code class="grammar-literal">-</code>" <a href="#grammar-production-HEX">HEX</a><code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <a href="#grammar-production-R_CHAR">R_CHAR</a> <code class="grammar-alt">|</code> <a href="#grammar-production-HEX">HEX</a><code class="grammar-paren">)</code><code class="grammar-plus">+</code> "<code class="grammar-literal">-</code>"<code class="grammar-opt">?</code> "<code class="grammar-literal">]</code>"</td>
</tr>
<tr id="grammar-production-STRING1">
<td>[16]</td>
<td><code>STRING1</code></td>
<td>::=</td>
<td>'<code class="grammar-literal">"</code>' <code class="grammar-paren">(</code><a href="#grammar-production-CHAR">CHAR</a> <code class="grammar-diff">-</code> '<code class="grammar-literal">"</code>'<code class="grammar-paren">)</code><code class="grammar-star">*</code> '<code class="grammar-literal">"</code>'</td>
</tr>
<tr id="grammar-production-STRING2">
<td>[17]</td>
<td><code>STRING2</code></td>
<td>::=</td>
<td>"<code class="grammar-literal">'</code>" <code class="grammar-paren">(</code><a href="#grammar-production-CHAR">CHAR</a> <code class="grammar-diff">-</code> "<code class="grammar-literal">'</code>"<code class="grammar-paren">)</code><code class="grammar-star">*</code> "<code class="grammar-literal">'</code>"</td>
</tr>
<tr id="grammar-production-CHAR">
<td>[18]</td>
<td><code>CHAR</code></td>
<td>::=</td>
<td><code class="grammar-brac">[</code><code class="grammar-char-escape"><abbr title="horizontal tab">#x09</abbr></code><code class="grammar-char-escape"><abbr title="new line">#x0A</abbr></code><code class="grammar-char-escape"><abbr title="carriage return">#x0D</abbr></code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-char-escape"><abbr title="space">#x20</abbr></code><code class="grammar-literal">-</code><code class="grammar-char-escape"><abbr title="unicode U+D7FF">#xD7FF</abbr></code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-char-escape"><abbr title="unicode U+E000">#xE000</abbr></code><code class="grammar-literal">-</code><code class="grammar-char-escape"><abbr title="unicode U+FFFD">#xFFFD</abbr></code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-char-escape"><abbr title="unicode U+10000">#x00010000</abbr></code><code class="grammar-literal">-</code><code class="grammar-char-escape"><abbr title="unicode U+10FFFF">#x0010FFFF</abbr></code><code class="grammar-brac">]</code></td>
</tr>
<tr id="grammar-production-R_CHAR">
<td>[19]</td>
<td><code>R_CHAR</code></td>
<td>::=</td>
<td><a href="#grammar-production-CHAR">CHAR</a> <code class="grammar-diff">-</code> <code class="grammar-paren">(</code>"<code class="grammar-literal">]</code>" <code class="grammar-alt">|</code> "<code class="grammar-literal">-</code>" <code class="grammar-alt">|</code> <a href="#grammar-production-HEX">HEX</a><code class="grammar-paren">)</code></td>
</tr>
<tr id="grammar-production-POSTFIX">
<td>[20]</td>
<td><code>POSTFIX</code></td>
<td>::=</td>
<td><code class="grammar-brac">[</code><code class="grammar-literal">?*+</code><code class="grammar-brac">]</code></td>
</tr>
<tr id="grammar-production-PASS">
<td>[21]</td>
<td><code>PASS</code></td>
<td>::=</td>
<td><code class="grammar-brac">[</code><code class="grammar-char-escape"><abbr title="horizontal tab">#x09</abbr></code><code class="grammar-char-escape"><abbr title="new line">#x0A</abbr></code><code class="grammar-char-escape"><abbr title="carriage return">#x0D</abbr></code><code class="grammar-char-escape"><abbr title="space">#x20</abbr></code><code class="grammar-brac">]</code> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code><code class="grammar-paren">(</code><code class="grammar-paren">(</code>"<code class="grammar-literal">#</code>" <code class="grammar-diff">-</code> "<code class="grammar-literal">#x</code>"<code class="grammar-paren">)</code> <code class="grammar-alt">|</code> "<code class="grammar-literal">//</code>"<code class="grammar-paren">)</code> <code class="grammar-brac">[</code><code class="grammar-literal">^</code><code class="grammar-char-escape"><abbr title="new line">#x0A</abbr></code><code class="grammar-char-escape"><abbr title="carriage return">#x0D</abbr></code><code class="grammar-brac">]</code><code class="grammar-star">*</code><code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code>"<code class="grammar-literal">/*</code>" <code class="grammar-paren">(</code><code class="grammar-paren">(</code>"<code class="grammar-literal">*</code>" <code class="grammar-brac">[</code><code class="grammar-literal">^/</code><code class="grammar-brac">]</code><code class="grammar-paren">)</code><code class="grammar-opt">?</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">^*</code><code class="grammar-brac">]</code><code class="grammar-paren">)</code><code class="grammar-star">*</code> "<code class="grammar-literal">*/</code>"<code class="grammar-paren">)</code> <code class="grammar-alt">|</code> <code class="grammar-paren">(</code>"<code class="grammar-literal">(*</code>" <code class="grammar-paren">(</code><code class="grammar-paren">(</code>"<code class="grammar-literal">*</code>" <code class="grammar-brac">[</code><code class="grammar-literal">^)</code><code class="grammar-brac">]</code><code class="grammar-paren">)</code><code class="grammar-opt">?</code> <code class="grammar-alt">|</code> <code class="grammar-brac">[</code><code class="grammar-literal">^*</code><code class="grammar-brac">]</code><code class="grammar-paren">)</code><code class="grammar-star">*</code> "<code class="grammar-literal">*)</code>"<code class="grammar-paren">)</code></td>
</tr>
<tr id="grammar-declaration-pass">
<td>@pass</td>
<td><code></code></td>
<td></td>
<td><a href="#grammar-production-PASS">PASS</a></td>
</tr>
</tbody>
</table>