<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/57094>57094</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Define the `__cpp_consteval` macro now that support is complete
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang:frontend
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          BertalanD
      </td>
    </tr>
</table>

<pre>
    Commit 3d2629dd3aab17098813c68b5b76bb864bc5e285 marked `consteval` support as completed for the Clang 15 release. However, the `__cpp_consteval` feature test macro is still not defined. If the feature is indeed production-ready, it would be nice to define this macro, both on `main` and the release branch.

https://github.com/llvm/llvm-project/blob/0b12f770241134865be39d73413466da8430f126/clang/lib/Frontend/InitPreprocessor.cpp#L679

cc @cor3ntin, @ChuanqiXu9

See also #53906
</pre>
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