<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/102847>102847</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] set feature test macro ` __cpp_deduction_guides` for P1814R0
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          h-vetinari
      </td>
    </tr>
</table>

<pre>
    The paper (#54051) was mostly implemented in https://github.com/llvm/llvm-project/pull/77890 & #89358, where @cor3ntin [said](https://github.com/llvm/llvm-project/pull/89358#discussion_r1575876411):
> [...] I suspect that we do want to finalize the feature for Clang 19.

I cannot tell from browsing the various PRs/issues what (if anything) is still left to do, so opening this issue to track (AFAICT, there are some follow-up issues (e.g. https://github.com/llvm/llvm-project/issues/92224), but they don't look like they have any user-visible impact).

CC @hokein


</pre>
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