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

```
<lexer>
```
```
  <config>
```
```
    <name>C</name>
```
```
    <alias>c</alias>
```
```
    <filename>*.c</filename>
```
```
    <filename>*.h</filename>
```
```
    <filename>*.idc</filename>
```
```
    <filename>*.x[bp]m</filename>
```
```
    <mime_type>text/x-chdr</mime_type>
```
```
    <mime_type>text/x-csrc</mime_type>
```

    <mime_type>image/x-xbitmap</mime_type>

    <mime_type>image/x-xpixmap</mime_type>

```
    <ensure_nl>true</ensure_nl>
```
```
    <analyse first="true" >
```

      <regex pattern="(?m)^\s*#include &lt;" score="0.1" />

      <regex pattern="(?m)^\s*#ifn?def " score="0.1" />

```
    </analyse>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="statement">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="statements"/>
```
```
      </rule>
```
```
      <rule pattern="[{}]">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern=";">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="function">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```
```
      <rule>
```
```
        <include state="statements"/>
```
```
      </rule>
```
```
      <rule pattern=";">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="\{">
```
```
        <token type="Punctuation"/>
```
```
        <push/>
```
```
      </rule>
```
```
      <rule pattern="\}">
```
```
        <token type="Punctuation"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="string">
```
```
      <rule pattern="&#34;">
```
```
        <token type="LiteralString"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```

      <rule pattern="\\([\\abfnrtv&#34;\&#39;]|x[a-fA-F0-9]{2,4}|u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8}|[0-7]{1,3})">

        <token type="LiteralStringEscape"/>

```
      </rule>
```
```
      <rule pattern="[^\\&#34;\n]+">
```
```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
      <rule pattern="\\\n">
```
```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
      <rule pattern="\\">
```
```
        <token type="LiteralString"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="macro">
```

      <rule pattern="(include)(\s*(?:/[*].*?[*]/\s*)?)([^\n]+)">

```
        <bygroups>
```

          <token type="CommentPreproc"/>

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

          <token type="CommentPreprocFile"/>

```
        </bygroups>
```
```
      </rule>
```
```
      <rule pattern="[^/\n]+">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```

      <rule pattern="/[*](.|\n)*?[*]/">

        <token type="CommentMultiline"/>

```
      </rule>
```
```
      <rule pattern="//.*?\n">
```
```
        <token type="CommentSingle"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern="/">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
      <rule pattern="(?&lt;=\\)\n">
```
```
        <token type="CommentPreproc"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="CommentPreproc"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="if0">
```

      <rule pattern="^\s*#if.*?(?&lt;!\\)\n">

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

      <rule pattern="^\s*#el(?:se|if).*\n">

```
        <token type="CommentPreproc"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```

      <rule pattern="^\s*#endif.*?(?&lt;!\\)\n">

```
        <token type="CommentPreproc"/>
```
```
        <pop depth="1"/>
```
```
      </rule>
```
```
      <rule pattern=".*?\n">
```
```
        <token type="Comment"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="whitespace">
```
```
      <rule pattern="^#if\s+0">
```
```
        <token type="CommentPreproc"/>
```
```
        <push state="if0"/>
```
```
      </rule>
```
```
      <rule pattern="^#">
```
```
        <token type="CommentPreproc"/>
```
```
        <push state="macro"/>
```
```
      </rule>
```

      <rule pattern="^(\s*(?:/[*].*?[*]/\s*)?)(#if\s+0)">

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

          <token type="CommentPreproc"/>

```
        </bygroups>
```
```
        <push state="if0"/>
```
```
      </rule>
```

      <rule pattern="^(\s*(?:/[*].*?[*]/\s*)?)(#)">

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

          <token type="CommentPreproc"/>

```
        </bygroups>
```
```
        <push state="macro"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="\s+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="\\\n">
```
```
        <token type="Text"/>
```
```
      </rule>
```

      <rule pattern="//(\n|[\w\W]*?[^\\]\n)">

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

      <rule pattern="/(\\\n)?[*][\w\W]*?[*](\\\n)?/">

        <token type="CommentMultiline"/>

```
      </rule>
```

      <rule pattern="/(\\\n)?[*][\w\W]*">

        <token type="CommentMultiline"/>

```
      </rule>
```
```
    </state>
```
```
    <state name="statements">
```
```
      <rule pattern="(L?)(&#34;)">
```
```
        <bygroups>
```

          <token type="LiteralStringAffix"/>

          <token type="LiteralString"/>

```
        </bygroups>
```
```
        <push state="string"/>
```
```
      </rule>
```

      <rule pattern="(L?)(&#39;)(\\.|\\[0-7]{1,3}|\\x[a-fA-F0-9]{1,2}|[^\\\&#39;\n])(&#39;)">

```
        <bygroups>
```

          <token type="LiteralStringAffix"/>

          <token type="LiteralStringChar"/>

          <token type="LiteralStringChar"/>

          <token type="LiteralStringChar"/>

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

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

        <token type="LiteralNumberFloat"/>

```
      </rule>
```

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

        <token type="LiteralNumberFloat"/>

```
      </rule>
```

      <rule pattern="0x[0-9a-fA-F]+[LlUu]*">

        <token type="LiteralNumberHex"/>

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

        <token type="LiteralNumberOct"/>

```
      </rule>
```
```
      <rule pattern="\d+[LlUu]*">
```

        <token type="LiteralNumberInteger"/>

```
      </rule>
```
```
      <rule pattern="\*/">
```
```
        <token type="Error"/>
```
```
      </rule>
```

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

```
        <token type="Operator"/>
```
```
      </rule>
```
```
      <rule pattern="[()\[\],.]">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```

      <rule pattern="(restricted|volatile|continue|register|default|typedef|struct|extern|switch|sizeof|static|return|union|while|const|break|goto|enum|else|case|auto|for|asm|if|do)\b">

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

      <rule pattern="(bool|int|long|float|short|double|char((8|16|32)_t)?|unsigned|signed|void|u?int(_fast|_least|)(8|16|32|64)_t)\b|\b[a-z]\w*_t\b">

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

      <rule pattern="(typename|__inline|restrict|_inline|thread|inline|naked)\b">

        <token type="KeywordReserved"/>

```
      </rule>
```

      <rule pattern="(__m(128i|128d|128|64))\b">

        <token type="KeywordReserved"/>

```
      </rule>
```

      <rule pattern="__(forceinline|identifier|unaligned|declspec|fastcall|finally|stdcall|wchar_t|assume|except|int32|cdecl|int16|leave|based|raise|int64|noop|int8|w64|try|asm)\b">

        <token type="KeywordReserved"/>

```
      </rule>
```

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

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

      <rule pattern="([a-zA-Z_]\w*)(\s*)(:)(?!:)">

```
        <bygroups>
```
```
          <token type="NameLabel"/>
```
```
          <token type="Text"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```

      <rule pattern="\b[A-Za-z_]\w*(?=\s*\()">

```
          <token type="NameFunction"/>
```
```
      </rule>
```
```
      <rule pattern="[a-zA-Z_]\w*">
```
```
        <token type="Name"/>
```
```
      </rule>
```
```
    </state>
```
```
    <state name="root">
```
```
      <rule>
```
```
        <include state="whitespace"/>
```
```
      </rule>
```

      <rule pattern="((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;{]*)(\{)">

```
        <bygroups>
```
```
          <usingself state="root"/>
```
```
          <token type="NameFunction"/>
```
```
          <usingself state="root"/>
```
```
          <usingself state="root"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
        <push state="function"/>
```
```
      </rule>
```

      <rule pattern="((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;]*)(;)">

```
        <bygroups>
```
```
          <usingself state="root"/>
```
```
          <token type="NameFunction"/>
```
```
          <usingself state="root"/>
```
```
          <usingself state="root"/>
```
```
          <token type="Punctuation"/>
```
```
        </bygroups>
```
```
      </rule>
```
```
      <rule>
```
```
        <push state="statement"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```