<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/126257>126257</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL][clang-format] Add Language Mode for HLSL
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-format,
            HLSL
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
            V-FEXrt
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          V-FEXrt
      </td>
    </tr>
</table>

<pre>
    clang-format supports many different languages and as part of that support it can switch between different languages to add/remove formatting rules. Right now clang-format can fairly reasonably format HLSL running under C++ mode however annotation syntax could use better support.

Adding an HLSL mode is the first step in supporting HLSL specific formatting rules.

Automatically determining HLSL as the source language is a downstream task that may or may not actually be possible. Plenty of HLSL programs will not have obvious differences from C++ so autodetection may have to be limited to huristics or file extension. This is still an open design question.


AC:
  - A test in the flavor of [this one](https://github.com/llvm/llvm-project/blob/247430e9c41c61b66e2ee95c29a05de3e24c19b9/clang/test/Format/dump-config-objc-stdin.m) verifies language mode is HLSL 
</pre>
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