Viewing github.com/alecthomas/chroma/lexers/embedded/modula-2.xml

```
<lexer>
```
```
  <config>
```
```
    <name>Modula-2</name>
```
```
    <alias>modula2</alias>
```
```
    <alias>m2</alias>
```
```
    <filename>*.def</filename>
```
```
    <filename>*.mod</filename>
```

    <mime_type>text/x-modula2</mime_type>

```
    <dot_all>true</dot_all>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="dialecttags">
```
```
      <rule pattern="$\*!m2pim\*$">
```
```
        <token type="CommentSpecial"/>
```
```
      </rule>
```
```
      <rule pattern="$\*!m2iso\*$">
```
```
        <token type="CommentSpecial"/>
```
```
      </rule>
```
```
      <rule pattern="$\*!m2r10\*$">
```
```
        <token type="CommentSpecial"/>
```
```
      </rule>
```
```
      <rule pattern="$\*!objm2\*$">
```
```
        <token type="CommentSpecial"/>
```
```
      </rule>
```

      <rule pattern="\(\*!m2iso\+aglet\*\)">

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

      <rule pattern="\(\*!m2pim\+gm2\*\)">

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

      <rule pattern="\(\*!m2iso\+p1\*\)">

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

      <rule pattern="\(\*!m2iso\+xds\*\)">

```
        <token type="CommentSpecial"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="unigraph_operators">
```
```
      <rule pattern="[+-]">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="[*/]">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="\\">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="[=#&lt;&gt;]">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="\^">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="@">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="&amp;">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="~">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="`">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string_literals">
```

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

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

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

```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="identifiers">
```

      <rule pattern="([a-zA-Z_$][\w$]*)">

```
        <token type="Name"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="pragmas">
```
```
      <rule pattern="&lt;\*.*?\*&gt;">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
      <rule pattern="$\*\$.*?\*$">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="comments">
```
```
      <rule pattern="^//.*?\n">
```
```
        <token type="CommentSingle"/>
```
```
      </rule>
```

      <rule pattern="\(\*([^$].*?)\*\)">

        <token type="CommentMultiline"/>

```
      </rule>
```
```
      <rule pattern="/\*(.*?)\*/">
```

        <token type="CommentMultiline"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="whitespace">
```
```
      <rule pattern="\n+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```

    <state name="suffixed_number_literals">

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

        <token type="LiteralNumberOct"/>

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

        <token type="LiteralNumberOct"/>

```
      </rule>
```
```
      <rule pattern="[0-9A-F]+H">
```

        <token type="LiteralNumberHex"/>

```
      </rule>
```
```
    </state>
```

    <state name="plain_number_literals">

      <rule pattern="[0-9]+(\&#39;[0-9]+)*\.[0-9]+(\&#39;[0-9]+)*[eE][+-]?[0-9]+(\&#39;[0-9]+)*">

        <token type="LiteralNumberFloat"/>

```
      </rule>
```

      <rule pattern="[0-9]+(\&#39;[0-9]+)*\.[0-9]+(\&#39;[0-9]+)*">

        <token type="LiteralNumberFloat"/>

```
      </rule>
```

      <rule pattern="[0-9]+(\&#39;[0-9]+)*">

        <token type="LiteralNumberInteger"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="digraph_punctuation">
```
```
      <rule pattern="\.\.">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="&lt;&lt;">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="&gt;&gt;">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="-&gt;">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\|#">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="##">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\|\*">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
    </state>
```

    <state name="unigraph_punctuation">

```
      <rule pattern="[()\[\]{},.:;|]">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="!">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\?">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="dialecttags"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="pragmas"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="comments"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="identifiers"/>
```
```
      </rule>
```
```
      <rule>
```

        <include state="suffixed_number_literals"/>

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

        <include state="prefixed_number_literals"/>

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

        <include state="plain_number_literals"/>

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

        <include state="string_literals"/>

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

        <include state="digraph_punctuation"/>

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

        <include state="digraph_operators"/>

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

        <include state="unigraph_punctuation"/>

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

        <include state="unigraph_operators"/>

```
      </rule>
```
```
    </state>
```

    <state name="prefixed_number_literals">

      <rule pattern="0b[01]+(\&#39;[01]+)*">

        <token type="LiteralNumberBin"/>

```
      </rule>
```

      <rule pattern="0[ux][0-9A-F]+(\&#39;[0-9A-F]+)*">

        <token type="LiteralNumberHex"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="digraph_operators">
```
```
      <rule pattern="\*\.">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="\+&gt;">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="&lt;&gt;">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="&lt;=">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="&gt;=">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="==">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="::">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern=":=">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="\+\+">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="--">
```
```
        <token type="Operator"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```