<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/85432>85432</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc++] Add a global private constructor tag
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            libc++
      </td>
    </tr>

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

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

<pre>
     It would be nice to have a single tag type for private constructors -- we could define it library-wide and reuse it whenever we need one.

_Originally posted by @ldionne in https://github.com/llvm/llvm-project/pull/82113#discussion_r1504669419_
 
</pre>
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