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      <base href="https://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - ?: operator does not remove nullable"
   href="https://llvm.org/bugs/show_bug.cgi?id=27192">27192</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>?: operator does not remove nullable
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

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

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Frontend
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>peter@stairways.com.au
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The code:

#pragma clang diagnostic push
#pragma clang diagnostic warning "-Wnullable-to-nonnull-conversion"

void Test()
{
    NSDictionary* d = @{};
    CGPoint location = NSPointFromString( d[@"Nothing"] ?: @"{0,0}" );
    NSLog( @"location is %@", NSStringFromPoint(location) );
}

#pragma clang diagnostic pop

Reports the warning:

<span class="quote">>warning: implicit conversion from nullable pointer 'id _Nullable' to non-nullable pointer type 'NSString * _Nonnull' [-Wnullable-to-nonnull-conversion]
>        CGPoint location = NSPointFromString( d[@"Nothing"] ?: @"{0,0}" );</span >

The ?: operator should be smart enough to know that if the right hand is
non-nullable then the entire expression is non-nullable.</pre>
        </div>
      </p>
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