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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [QOI] complain about declaration that changes meaning"
href="http://llvm.org/bugs/show_bug.cgi?id=15559">15559</a>
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<th>Summary</th>
<td>[QOI] complain about declaration that changes meaning
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</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
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>zeratul976@hotmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>For the following code:
struct foo {};
struct A
{
typedef foo foo_type;
void foo();
};
GCC gives a compiler error:
test.cpp:7:14: error: declaration of 'void A::foo()' [-fpermissive]
void foo();
^
test.cpp:1:8: error: changes meaning of 'foo' from 'struct foo' [-fpermissive]
struct foo {};
^
Clang gives no error. I believe this is covered by section 3.3.7 of the
standard:
"A name N used in a class S shall refer to the same declaration in its context
and when re-evaluated in the completed scope of S. No diagnostic is required
for a violation of this rule."
I am filing this as a quality-of-implementation issue. While no diagnostic is
required, I think it would be a good idea for clang to issue one, seeing as GCC
does.</pre>
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