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

```
<lexer>
```
```
  <config>
```
```
    <name>Dart</name>
```
```
    <alias>dart</alias>
```
```
    <filename>*.dart</filename>
```
```
    <mime_type>text/x-dart</mime_type>
```
```
    <dot_all>true</dot_all>
```
```
  </config>
```
```
  <rules>
```

    <state name="string_double_multiline">

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

        <token type="LiteralStringDouble"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^&#34;$\\]+">
```

        <token type="LiteralStringDouble"/>

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

        <include state="string_common"/>

```
      </rule>
```
```
      <rule pattern="(\$|\&#34;)+">
```

        <token type="LiteralStringDouble"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="class">
```
```
      <rule pattern="[a-zA-Z_$]\w*">
```
```
        <token type="NameClass"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="import_decl">
```
```
      <rule>
```

        <include state="string_literal"/>

```
      </rule>
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```

      <rule pattern="\b(as|show|hide)\b">

```
        <token type="Keyword"/>
```
```
      </rule>
```
```
      <rule pattern="[a-zA-Z_$]\w*">
```
```
        <token type="Name"/>
```
```
      </rule>
```
```
      <rule pattern="\,">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\;">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```

    <state name="string_single_multiline">

```
      <rule pattern="&#39;&#39;&#39;">
```

        <token type="LiteralStringSingle"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^\&#39;$\\]+">
```

        <token type="LiteralStringSingle"/>

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

        <include state="string_common"/>

```
      </rule>
```
```
      <rule pattern="(\$|\&#39;)+">
```

        <token type="LiteralStringSingle"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```

        <include state="string_literal"/>

```
      </rule>
```
```
      <rule pattern="#!(.*?)$">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```

      <rule pattern="\b(import|export)\b">

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

      <rule pattern="\b(library|source|part of|part)\b">

```
        <token type="Keyword"/>
```
```
      </rule>
```
```
      <rule pattern="[^\S\n]+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="//.*?\n">
```
```
        <token type="CommentSingle"/>
```
```
      </rule>
```
```
      <rule pattern="/\*.*?\*/">
```

        <token type="CommentMultiline"/>

```
      </rule>
```

      <rule pattern="\b(class)\b(\s+)">

```
        <bygroups>
```

          <token type="KeywordDeclaration"/>

```
          <token type="Text"/>
```
```
        </bygroups>
```
```
        <push state="class"/>
```
```
      </rule>
```

      <rule pattern="\b(assert|break|case|catch|continue|default|do|else|finally|for|if|in|is|new|return|super|switch|this|throw|try|while)\b">

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

      <rule pattern="\b(abstract|async|await|const|extends|factory|final|get|implements|native|operator|required|set|static|sync|typedef|var|with|yield)\b">

        <token type="KeywordDeclaration"/>

```
      </rule>
```

      <rule pattern="\b(bool|double|dynamic|int|num|Object|String|void)\b">

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

      <rule pattern="\b(false|null|true)\b">

        <token type="KeywordConstant"/>

```
      </rule>
```

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

```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="[a-zA-Z_$]\w*:">
```
```
        <token type="NameLabel"/>
```
```
      </rule>
```
```
      <rule pattern="[a-zA-Z_$]\w*">
```
```
        <token type="Name"/>
```
```
      </rule>
```
```
      <rule pattern="[(){}\[\],.;]">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```

      <rule pattern="0[xX][0-9a-fA-F]+">

        <token type="LiteralNumberHex"/>

```
      </rule>
```

      <rule pattern="\d+(\.\d*)?([eE][+-]?\d+)?">

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

      <rule pattern="\.\d+([eE][+-]?\d+)?">

```
        <token type="LiteralNumber"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string_literal">
```

      <rule pattern="r&#34;&#34;&#34;([\w\W]*?)&#34;&#34;&#34;">

        <token type="LiteralStringDouble"/>

```
      </rule>
```

      <rule pattern="r&#39;&#39;&#39;([\w\W]*?)&#39;&#39;&#39;">

        <token type="LiteralStringSingle"/>

```
      </rule>
```

      <rule pattern="r&#34;(.*?)&#34;">

        <token type="LiteralStringDouble"/>

```
      </rule>
```

      <rule pattern="r&#39;(.*?)&#39;">

        <token type="LiteralStringSingle"/>

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

        <token type="LiteralStringDouble"/>

        <push state="string_double_multiline"/>

```
      </rule>
```
```
      <rule pattern="&#39;&#39;&#39;">
```

        <token type="LiteralStringSingle"/>

        <push state="string_single_multiline"/>

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

        <token type="LiteralStringDouble"/>

```
        <push state="string_double"/>
```
```
      </rule>
```
```
      <rule pattern="&#39;">
```

        <token type="LiteralStringSingle"/>

```
        <push state="string_single"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string_common">
```

      <rule pattern="\\(x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4}|u\{[0-9A-Fa-f]*\}|[a-z&#39;\&#34;$\\])">

        <token type="LiteralStringEscape"/>

```
      </rule>
```

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

```
        <bygroups>
```

          <token type="LiteralStringInterpol"/>

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

          <token type="LiteralStringInterpol"/>

```
          <usingself state="root"/>
```

          <token type="LiteralStringInterpol"/>

```
        </bygroups>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string_double">
```
```
      <rule pattern="&#34;">
```

        <token type="LiteralStringDouble"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^&#34;$\\\n]+">
```

        <token type="LiteralStringDouble"/>

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

        <include state="string_common"/>

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

        <token type="LiteralStringDouble"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="string_single">
```
```
      <rule pattern="&#39;">
```

        <token type="LiteralStringSingle"/>

```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="[^&#39;$\\\n]+">
```

        <token type="LiteralStringSingle"/>

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

        <include state="string_common"/>

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

        <token type="LiteralStringSingle"/>

```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```