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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - C++11-style sizeof does not compile in certain cases."
href="http://llvm.org/bugs/show_bug.cgi?id=19266">19266</a>
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</tr>
<tr>
<th>Summary</th>
<td>C++11-style sizeof does not compile in certain cases.
</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>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>astellar@ro.ru
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Consider this artificial code:
struct foo
{
int bar;
};
template <typename T>
struct A { };
template <typename T>
struct B : public A<T>
{
void baz()
{
enum { count = sizeof(foo::bar) };
}
};
int main(int, char *[])
{
B<int>().baz();
return 0;
}
clang++ -std=c++11 bug.cpp produces following output:
bug.cpp:14:36: fatal error: 'foo::bar' is not a member of class 'B<int>'
enum { count = sizeof(foo::bar) };
~~~~~^
bug.cpp:20:14: note: in instantiation of member function 'B<int>::baz'
requested here
B<int>().baz();
I see this error with both clang 3.4 on Linux and 3.5.r203967 snapshot on
Windows, so I
suppose that it fails in trunk too (can't test it unfortunately). Compilation
does not
fail if:
- B::baz is turned into static function;
- enum is moved to struct B's scope;
- I use sizeof(static_cast<foo*>(0)->bar) instead of sizeof(foo::bar);
- A and/or B are not template types.
GCC 4.8 compiles this code without errors.</pre>
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