etc/ebnf.html

<!-- Generated with ebnf version 2.4.0. 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">&quot;</code>' <code class="grammar-paren">(</code><a href="#grammar-production-CHAR">CHAR</a> <code class="grammar-diff">-</code> '<code class="grammar-literal">&quot;</code>'<code class="grammar-paren">)</code><code class="grammar-star">*</code> '<code class="grammar-literal">&quot;</code>'</td>
    </tr>
    <tr id="grammar-production-STRING2">
      <td>[17]</td>
      <td><code>STRING2</code></td>
      <td>::=</td>
      <td>"<code class="grammar-literal">&apos;</code>" <code class="grammar-paren">(</code><a href="#grammar-production-CHAR">CHAR</a> <code class="grammar-diff">-</code> "<code class="grammar-literal">&apos;</code>"<code class="grammar-paren">)</code><code class="grammar-star">*</code> "<code class="grammar-literal">&apos;</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>
    