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

```
<lexer>
```
```
  <config>
```
```
    <name>Mako</name>
```
```
    <alias>mako</alias>
```
```
    <filename>*.mao</filename>
```

    <mime_type>application/x-mako</mime_type>

```
  </config>
```
```
  <rules>
```
```
    <state name="root">
```

      <rule pattern="(\s*)(%)(\s*end(?:\w+))(\n|\Z)">

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

          <token type="CommentPreproc"/>

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

      <rule pattern="(\s*)(%)([^\n]*)(\n|\Z)">

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

          <token type="CommentPreproc"/>

```
          <using lexer="Python"/>
```
```
          <token type="Other"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="(\s*)(##[^\n]*)(\n|\Z)">

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

          <token type="CommentPreproc"/>

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

      <rule pattern="(?s)&lt;%doc&gt;.*?&lt;/%doc&gt;">

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

      <rule pattern="(&lt;%)([\w.:]+)">

```
        <bygroups>
```

          <token type="CommentPreproc"/>

```
          <token type="NameBuiltin"/>
```
```
        </bygroups>
```
```
        <push state="tag"/>
```
```
      </rule>
```

      <rule pattern="(&lt;/%)([\w.:]+)(&gt;)">

```
        <bygroups>
```

          <token type="CommentPreproc"/>

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

          <token type="CommentPreproc"/>

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

      <rule pattern="&lt;%(?=([\w.:]+))">

```
        <token type="CommentPreproc"/>
```
```
        <push state="ondeftags"/>
```
```
      </rule>
```

      <rule pattern="(&lt;%(?:!?))(.*?)(%&gt;)(?s)">

```
        <bygroups>
```

          <token type="CommentPreproc"/>

```
          <using lexer="Python"/>
```

          <token type="CommentPreproc"/>

```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="(\$\{)(.*?)(\})">
```
```
        <bygroups>
```

          <token type="CommentPreproc"/>

```
          <using lexer="Python"/>
```

          <token type="CommentPreproc"/>

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

      <rule pattern="(?sx)&#xA;                (.+?)                # anything, followed by:&#xA;                (?:&#xA;                 (?&lt;=\n)(?=%|\#\#) | # an eval or comment line&#xA;                 (?=\#\*) |          # multiline comment&#xA;                 (?=&lt;/?%) |          # a python block&#xA;                                     # call start or end&#xA;                 (?=\$\{) |          # a substitution&#xA;                 (?&lt;=\n)(?=\s*%) |&#xA;                                     # - don&#39;t consume&#xA;                 (\\\n) |            # an escaped newline&#xA;                 \Z                  # end of string&#xA;                )&#xA;            ">

```
        <bygroups>
```
```
          <token type="Other"/>
```
```
          <token type="Operator"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="ondeftags">
```
```
      <rule pattern="&lt;%">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```

      <rule pattern="(?&lt;=&lt;%)(include|inherit|namespace|page)">

```
        <token type="NameBuiltin"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="tag"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="tag">
```

      <rule pattern="((?:\w+)\s*=)(\s*)(&#34;.*?&#34;)">

```
        <bygroups>
```

          <token type="NameAttribute"/>

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

          <token type="LiteralString"/>

```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="/?\s*&gt;">
```
```
        <token type="CommentPreproc"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="attr">
```
```
      <rule pattern="&#34;.*?&#34;">
```
```
        <token type="LiteralString"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="&#39;.*?&#39;">
```
```
        <token type="LiteralString"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^\s&gt;]+">
```
```
        <token type="LiteralString"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```