Viewing github.com/alecthomas/chroma/lexers/embedded/antlr.xml

```
<lexer>
```
```
  <config>
```
```
    <name>ANTLR</name>
```
```
    <alias>antlr</alias>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="nested-arg-action">
```

      <rule pattern="([^$\[\]\&#39;&#34;/]+|&#34;(\\\\|\\&#34;|[^&#34;])*&#34;|&#39;(\\\\|\\&#39;|[^&#39;])*&#39;|//.*$\n?|/\*(.|\n)*?\*/|/(?!\*)(\\\\|\\/|[^/])*/|/)+">

```
        <token type="Other"/>
```
```
      </rule>
```
```
      <rule pattern="\[">
```
```
        <token type="Punctuation"/>
```
```
        <push/>
```
```
      </rule>
```
```
      <rule pattern="\]">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```

      <rule pattern="(\$[a-zA-Z]+)(\.?)(text|value)?">

```
        <bygroups>
```
```
          <token type="NameVariable"/>
```
```
          <token type="Punctuation"/>
```
```
          <token type="NameProperty"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="(\\\\|\\\]|\\\[|[^\[\]])+">

```
        <token type="Other"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="exception">
```
```
      <rule pattern="\n">
```
```
        <token type="TextWhitespace"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="\s">
```
```
        <token type="TextWhitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule pattern="\[">
```
```
        <token type="Punctuation"/>
```

        <push state="nested-arg-action"/>

```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
        <push state="action"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="whitespace">
```
```
      <rule pattern="\s+">
```
```
        <token type="TextWhitespace"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```

      <rule pattern="(lexer|parser|tree)?(\s*)(grammar\b)(\s*)([A-Za-z]\w*)(;)">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameClass"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="options\b">
```
```
        <token type="Keyword"/>
```
```
        <push state="options"/>
```
```
      </rule>
```
```
      <rule pattern="tokens\b">
```
```
        <token type="Keyword"/>
```
```
        <push state="tokens"/>
```
```
      </rule>
```

      <rule pattern="(scope)(\s*)([A-Za-z]\w*)(\s*)(\{)">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameVariable"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="action"/>
```
```
      </rule>
```

      <rule pattern="(catch|finally)\b">

```
        <token type="Keyword"/>
```
```
        <push state="exception"/>
```
```
      </rule>
```

      <rule pattern="(@[A-Za-z]\w*)(\s*)(::)?(\s*)([A-Za-z]\w*)(\s*)(\{)">

```
        <bygroups>
```
```
          <token type="NameLabel"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameLabel"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="action"/>
```
```
      </rule>
```

      <rule pattern="((?:protected|private|public|fragment)\b)?(\s*)([A-Za-z]\w*)(!)?">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameLabel"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```

        <push state="rule-alts" state="rule-prelims"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="tokens">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```

      <rule pattern="([A-Z]\w*)(\s*)(=)?(\s*)(\&#39;(?:\\\\|\\\&#39;|[^\&#39;]*)\&#39;)?(\s*)(;)">

```
        <bygroups>
```
```
          <token type="NameLabel"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```

          <token type="TextWhitespace"/>

          <token type="LiteralString"/>

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="\}">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="options">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```

      <rule pattern="([A-Za-z]\w*)(\s*)(=)(\s*)([A-Za-z]\w*|\&#39;(?:\\\\|\\\&#39;|[^\&#39;]*)\&#39;|[0-9]+|\*)(\s*)(;)">

```
        <bygroups>
```
```
          <token type="NameVariable"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Text"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="\}">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="rule-alts">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule pattern="options\b">
```
```
        <token type="Keyword"/>
```
```
        <push state="options"/>
```
```
      </rule>
```
```
      <rule pattern=":">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```

      <rule pattern="&#39;(\\\\|\\&#39;|[^&#39;])*&#39;">

```
        <token type="LiteralString"/>
```
```
      </rule>
```

      <rule pattern="&#34;(\\\\|\\&#34;|[^&#34;])*&#34;">

```
        <token type="LiteralString"/>
```
```
      </rule>
```

      <rule pattern="&lt;&lt;([^&gt;]|&gt;[^&gt;])&gt;&gt;">

```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
      <rule pattern="\$?[A-Z_]\w*">
```
```
        <token type="NameConstant"/>
```
```
      </rule>
```
```
      <rule pattern="\$?[a-z_]\w*">
```
```
        <token type="NameVariable"/>
```
```
      </rule>
```

      <rule pattern="(\+|\||-&gt;|=&gt;|=|\(|\)|\.\.|\.|\?|\*|\^|!|\#|~)">

```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern=",">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\[">
```
```
        <token type="Punctuation"/>
```

        <push state="nested-arg-action"/>

```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
        <push state="action"/>
```
```
      </rule>
```
```
      <rule pattern=";">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="rule-prelims">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule pattern="returns\b">
```
```
        <token type="Keyword"/>
```
```
      </rule>
```
```
      <rule pattern="\[">
```
```
        <token type="Punctuation"/>
```

        <push state="nested-arg-action"/>

```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
        <push state="action"/>
```
```
      </rule>
```

      <rule pattern="(throws)(\s+)([A-Za-z]\w*)">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameLabel"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="(,)(\s*)([A-Za-z]\w*)">

```
        <bygroups>
```
```
          <token type="Punctuation"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameLabel"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="options\b">
```
```
        <token type="Keyword"/>
```
```
        <push state="options"/>
```
```
      </rule>
```

      <rule pattern="(scope)(\s+)(\{)">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="action"/>
```
```
      </rule>
```

      <rule pattern="(scope)(\s+)([A-Za-z]\w*)(\s*)(;)">

```
        <bygroups>
```
```
          <token type="Keyword"/>
```

          <token type="TextWhitespace"/>

```
          <token type="NameLabel"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="(@[A-Za-z]\w*)(\s*)(\{)">

```
        <bygroups>
```
```
          <token type="NameLabel"/>
```

          <token type="TextWhitespace"/>

```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="action"/>
```
```
      </rule>
```
```
      <rule pattern=":">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="action">
```

      <rule pattern="([^${}\&#39;&#34;/\\]+|&#34;(\\\\|\\&#34;|[^&#34;])*&#34;|&#39;(\\\\|\\&#39;|[^&#39;])*&#39;|//.*$\n?|/\*(.|\n)*?\*/|/(?!\*)(\\\\|\\/|[^/])*/|\\(?!%)|/)+">

```
        <token type="Other"/>
```
```
      </rule>
```
```
      <rule pattern="(\\)(%)">
```
```
        <bygroups>
```
```
          <token type="Punctuation"/>
```
```
          <token type="Other"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="(\$[a-zA-Z]+)(\.?)(text|value)?">

```
        <bygroups>
```
```
          <token type="NameVariable"/>
```
```
          <token type="Punctuation"/>
```
```
          <token type="NameProperty"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
        <push/>
```
```
      </rule>
```
```
      <rule pattern="\}">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="comments">
```
```
      <rule pattern="//.*$">
```
```
        <token type="Comment"/>
```
```
      </rule>
```
```
      <rule pattern="/\*(.|\n)*?\*/">
```
```
        <token type="Comment"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```