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

```
<lexer>
```
```
  <config>
```
```
    <name>Tcl</name>
```
```
    <alias>tcl</alias>
```
```
    <filename>*.tcl</filename>
```
```
    <filename>*.rvt</filename>
```
```
    <mime_type>text/x-tcl</mime_type>
```

    <mime_type>text/x-script.tcl</mime_type>

    <mime_type>application/x-tcl</mime_type>

```
  </config>
```
```
  <rules>
```
```
    <state name="command-in-bracket">
```

      <rule pattern="\b(namespace|continue|variable|uplevel|foreach|return|update|elseif|global|rename|switch|upvar|error|vwait|catch|break|unset|array|apply|trace|after|while|then|else|expr|eval|proc|for|set|if)\b">

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

        <push state="params-in-bracket"/>

```
      </rule>
```

      <rule pattern="\b(platform::shell|pkg::create|pkg_mkIndex|fconfigure|re_syntax|fileevent|platform|fblocked|lreverse|mathfunc|encoding|registry|lreplace|history|bgerror|llength|lsearch|linsert|lassign|lappend|refchan|unknown|package|lrepeat|msgcat|mathop|format|interp|lrange|string|source|lindex|socket|concat|regsub|regexp|loadTk|memory|binary|append|unload|subst|split|lsort|clock|close|flush|fcopy|chan|glob|time|gets|http|dict|file|puts|tell|join|read|exit|exec|open|list|scan|seek|incr|info|lset|load|dde|pwd|pid|eof|tm|cd)\b">

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

        <push state="params-in-bracket"/>

```
      </rule>
```
```
      <rule pattern="([\w.-]+)">
```
```
        <token type="NameVariable"/>
```

        <push state="params-in-bracket"/>

```
      </rule>
```
```
      <rule pattern="#">
```
```
        <token type="Comment"/>
```
```
        <push state="comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="command-in-paren">
```

      <rule pattern="\b(namespace|continue|variable|uplevel|foreach|return|update|elseif|global|rename|switch|upvar|error|vwait|catch|break|unset|array|apply|trace|after|while|then|else|expr|eval|proc|for|set|if)\b">

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

        <push state="params-in-paren"/>

```
      </rule>
```

      <rule pattern="\b(platform::shell|pkg::create|pkg_mkIndex|fconfigure|re_syntax|fileevent|platform|fblocked|lreverse|mathfunc|encoding|registry|lreplace|history|bgerror|llength|lsearch|linsert|lassign|lappend|refchan|unknown|package|lrepeat|msgcat|mathop|format|interp|lrange|string|source|lindex|socket|concat|regsub|regexp|loadTk|memory|binary|append|unload|subst|split|lsort|clock|close|flush|fcopy|chan|glob|time|gets|http|dict|file|puts|tell|join|read|exit|exec|open|list|scan|seek|incr|info|lset|load|dde|pwd|pid|eof|tm|cd)\b">

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

        <push state="params-in-paren"/>

```
      </rule>
```
```
      <rule pattern="([\w.-]+)">
```
```
        <token type="NameVariable"/>
```

        <push state="params-in-paren"/>

```
      </rule>
```
```
      <rule pattern="#">
```
```
        <token type="Comment"/>
```
```
        <push state="comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="command-in-brace">
```

      <rule pattern="\b(namespace|continue|variable|uplevel|foreach|return|update|elseif|global|rename|switch|upvar|error|vwait|catch|break|unset|array|apply|trace|after|while|then|else|expr|eval|proc|for|set|if)\b">

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

        <push state="params-in-brace"/>

```
      </rule>
```

      <rule pattern="\b(platform::shell|pkg::create|pkg_mkIndex|fconfigure|re_syntax|fileevent|platform|fblocked|lreverse|mathfunc|encoding|registry|lreplace|history|bgerror|llength|lsearch|linsert|lassign|lappend|refchan|unknown|package|lrepeat|msgcat|mathop|format|interp|lrange|string|source|lindex|socket|concat|regsub|regexp|loadTk|memory|binary|append|unload|subst|split|lsort|clock|close|flush|fcopy|chan|glob|time|gets|http|dict|file|puts|tell|join|read|exit|exec|open|list|scan|seek|incr|info|lset|load|dde|pwd|pid|eof|tm|cd)\b">

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

        <push state="params-in-brace"/>

```
      </rule>
```
```
      <rule pattern="([\w.-]+)">
```
```
        <token type="NameVariable"/>
```

        <push state="params-in-brace"/>

```
      </rule>
```
```
      <rule pattern="#">
```
```
        <token type="Comment"/>
```
```
        <push state="comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="basic">
```
```
      <rule pattern="\(">
```
```
        <token type="Keyword"/>
```
```
        <push state="paren"/>
```
```
      </rule>
```
```
      <rule pattern="\[">
```
```
        <token type="Keyword"/>
```
```
        <push state="bracket"/>
```
```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Keyword"/>
```
```
        <push state="brace"/>
```
```
      </rule>
```
```
      <rule pattern="&#34;">
```

        <token type="LiteralStringDouble"/>

```
        <push state="string"/>
```
```
      </rule>
```
```
      <rule pattern="(eq|ne|in|ni)\b">
```
```
        <token type="OperatorWord"/>
```
```
      </rule>
```

      <rule pattern="!=|==|&lt;&lt;|&gt;&gt;|&lt;=|&gt;=|&amp;&amp;|\|\||\*\*|[-+~!*/%&lt;&gt;&amp;^|?:]">

```
        <token type="Operator"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="params-in-bracket">
```
```
      <rule pattern="\]">
```
```
        <token type="Keyword"/>
```

        <push state="#pop" state="#pop"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="params"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="data">
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="0x[a-fA-F0-9]+">
```

        <token type="LiteralNumberHex"/>

```
      </rule>
```
```
      <rule pattern="0[0-7]+">
```

        <token type="LiteralNumberOct"/>

```
      </rule>
```
```
      <rule pattern="\d+\.\d+">
```

        <token type="LiteralNumberFloat"/>

```
      </rule>
```
```
      <rule pattern="\d+">
```

        <token type="LiteralNumberInteger"/>

```
      </rule>
```
```
      <rule pattern="\$([\w.:-]+)">
```
```
        <token type="NameVariable"/>
```
```
      </rule>
```
```
      <rule pattern="([\w.:-]+)">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="command">
```

      <rule pattern="\b(namespace|continue|variable|uplevel|foreach|return|update|elseif|global|rename|switch|upvar|error|vwait|catch|break|unset|array|apply|trace|after|while|then|else|expr|eval|proc|for|set|if)\b">

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

      <rule pattern="\b(platform::shell|pkg::create|pkg_mkIndex|fconfigure|re_syntax|fileevent|platform|fblocked|lreverse|mathfunc|encoding|registry|lreplace|history|bgerror|llength|lsearch|linsert|lassign|lappend|refchan|unknown|package|lrepeat|msgcat|mathop|format|interp|lrange|string|source|lindex|socket|concat|regsub|regexp|loadTk|memory|binary|append|unload|subst|split|lsort|clock|close|flush|fcopy|chan|glob|time|gets|http|dict|file|puts|tell|join|read|exit|exec|open|list|scan|seek|incr|info|lset|load|dde|pwd|pid|eof|tm|cd)\b">

```
        <token type="NameBuiltin"/>
```
```
        <push state="params"/>
```
```
      </rule>
```
```
      <rule pattern="([\w.-]+)">
```
```
        <token type="NameVariable"/>
```
```
        <push state="params"/>
```
```
      </rule>
```
```
      <rule pattern="#">
```
```
        <token type="Comment"/>
```
```
        <push state="comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="params-in-brace">
```
```
      <rule pattern="\}">
```
```
        <token type="Keyword"/>
```

        <push state="#pop" state="#pop"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="params"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string-square">
```
```
      <rule pattern="\[">
```

        <token type="LiteralStringDouble"/>

```
        <push state="string-square"/>
```
```
      </rule>
```

      <rule pattern="(?s)(\\\\|\\[0-7]+|\\.|\\\n|[^\]\\])">

        <token type="LiteralStringDouble"/>

```
      </rule>
```
```
      <rule pattern="\]">
```

        <token type="LiteralStringDouble"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="bracket">
```
```
      <rule pattern="\]">
```
```
        <token type="Keyword"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule>
```

        <include state="command-in-bracket"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="basic"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="data"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="params-in-paren">
```
```
      <rule pattern="\)">
```
```
        <token type="Keyword"/>
```

        <push state="#pop" state="#pop"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="params"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="paren">
```
```
      <rule pattern="\)">
```
```
        <token type="Keyword"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule>
```

        <include state="command-in-paren"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="basic"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="data"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="comment">
```
```
      <rule pattern=".*[^\\]\n">
```
```
        <token type="Comment"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern=".*\\\n">
```
```
        <token type="Comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```
```
        <include state="command"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="basic"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="data"/>
```
```
      </rule>
```
```
      <rule pattern="\}">
```
```
        <token type="Keyword"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="brace">
```
```
      <rule pattern="\}">
```
```
        <token type="Keyword"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule>
```

        <include state="command-in-brace"/>

```
      </rule>
```
```
      <rule>
```
```
        <include state="basic"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="data"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="params">
```
```
      <rule pattern=";">
```
```
        <token type="Keyword"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="Text"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```

      <rule pattern="(else|elseif|then)\b">

```
        <token type="Keyword"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="basic"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="data"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string">
```
```
      <rule pattern="\[">
```

        <token type="LiteralStringDouble"/>

```
        <push state="string-square"/>
```
```
      </rule>
```

      <rule pattern="(?s)(\\\\|\\[0-7]+|\\.|[^&#34;\\])">

        <token type="LiteralStringDouble"/>

```
      </rule>
```
```
      <rule pattern="&#34;">
```

        <token type="LiteralStringDouble"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```