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

```
<lexer>
```
```
  <config>
```
```
    <name>PkgConfig</name>
```
```
    <alias>pkgconfig</alias>
```
```
    <filename>*.pc</filename>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="curly">
```
```
      <rule pattern="\}">
```

        <token type="LiteralStringInterpol"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="\w+">
```
```
        <token type="NameAttribute"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="spvalue">
```
```
      <rule>
```
```
        <include state="interp"/>
```
```
      </rule>
```
```
      <rule pattern="#.*$">
```
```
        <token type="CommentSingle"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="Text"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^${}#\n]+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern=".">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule pattern="#.*$">
```
```
        <token type="CommentSingle"/>
```
```
      </rule>
```
```
      <rule pattern="^(\w+)(=)">
```
```
        <bygroups>
```

          <token type="NameAttribute"/>

```
          <token type="Operator"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="^([\w.]+)(:)">
```
```
        <bygroups>
```
```
          <token type="NameTag"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="spvalue"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="interp"/>
```
```
      </rule>
```
```
      <rule pattern="[^${}#=:\n.]+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern=".">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="interp">
```
```
      <rule pattern="\$\$">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="\$\{">
```

        <token type="LiteralStringInterpol"/>

```
        <push state="curly"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```

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