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

```
<lexer>
```
```
  <config>
```
```
    <name>TableGen</name>
```
```
    <alias>tablegen</alias>
```
```
    <filename>*.td</filename>
```

    <mime_type>text/x-tablegen</mime_type>

```
  </config>
```
```
  <rules>
```
```
    <state name="whitespace">
```
```
      <rule pattern="(\n|\s)+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="//.*?\n">
```
```
        <token type="Comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="keyword">
```

      <rule pattern="(multiclass|foreach|string|class|field|defm|bits|code|list|def|int|let|dag|bit|in)\b">

```
        <token type="Keyword"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```
```
        <include state="macro"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```

      <rule pattern="c?&#34;[^&#34;]*?&#34;">

```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="keyword"/>
```
```
      </rule>
```

      <rule pattern="\$[_a-zA-Z][_\w]*">

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

      <rule pattern="\d*[_a-zA-Z][_\w]*">

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

      <rule pattern="\[\{[\w\W]*?\}\]">

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

      <rule pattern="[+-]?\d+|0x[\da-fA-F]+|0b[01]+">

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

      <rule pattern="[=&lt;&gt;{}\[\]()*.,!:;]">

```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="macro">
```

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

```
        <bygroups>
```

          <token type="CommentPreproc"/>

          <token type="LiteralString"/>

```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="^\s*#(ifdef|ifndef)\s+[_\w][_\w\d]*">

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

      <rule pattern="^\s*#define\s+[_\w][_\w\d]*">

```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
      <rule pattern="^\s*#endif">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```

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