<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot construct unique_ptr with pointer to incomplete type"
   href="https://bugs.llvm.org/show_bug.cgi?id=39363">39363</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Cannot construct unique_ptr with pointer to incomplete type
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>All Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>zturner@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>eric@efcs.ca, llvm-bugs@lists.llvm.org, mclow.lists@gmail.com, mclow@qti.qualcomm.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre><a href="https://godbolt.org/z/a8ml4u">https://godbolt.org/z/a8ml4u</a>

#include <memory>

struct foo;

struct bar
{
    // ok
    std::unique_ptr<foo> a;

    // ok
    std::unique_ptr<foo> b{};

    // not ok
    std::unique_ptr<foo> c{nullptr};
};

According to <a href="http://eel.is/c++draft/unique.ptr#4.sentence-3">http://eel.is/c++draft/unique.ptr#4.sentence-3</a>, it should be ok
for the type to be incomplete.  Since this is construction and not assignment,
it is not necessary to call delete and so we don't need to do a reset, hence we
shouldn't yet require a complete type.</pre>
        </div>
      </p>


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