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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Objective-C: no warning if calling known selector on a forward declared @class."
href="https://bugs.llvm.org/show_bug.cgi?id=32701">32701</a>
</td>
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<th>Summary</th>
<td>Objective-C: no warning if calling known selector on a forward declared @class.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sdefresne@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Compiling the following code fragment with clang version "Apple LLVM version
8.0.0 (clang-800.0.42.1)" or "clang version 5.0.0 (trunk 298539)" should emit a
warning that class Foo does not respond to selector -baz:
==== foo.m ====
@class Foo;
@protocol Bar
- (void)baz;
@end
void DoSomething(Foo* f) {
[f baz];
}
==== foo.m ====
$ clang++ -o foo.o foo.mm -c -W -Wextra -Wselector -Wselector-type-mismatch
-Wstrict-selector-match -Wundeclared-selector -Wmissing-selector-name
$
EXPECTED RESULT: a warning should be printed that Foo may not respond to -baz
selector as happens when the Bar protocol is not existent.</pre>
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