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<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>
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<th>Summary</th>
<td>?: operator does not remove nullable
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>peter@stairways.com.au
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</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<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>
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