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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang++ accepts invalid using-directive"
href="http://llvm.org/bugs/show_bug.cgi?id=18574">18574</a>
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<th>Summary</th>
<td>clang++ accepts invalid using-directive
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.3
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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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>pipping@exherbo.org
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Please consider the following snippet of code:
<<SNIP
template <typename T> struct A {
typedef int type;
};
template <typename T> struct B : public A<T> {
//typedef typename A<T>::type type;
//using type = typename A<T>::type;
using typename A<T>::type;
static const int block_size = type::block_size;
};
<<SNAP
Specifically, the line
using typename A<T>::type;
Unlike the two lines just above it, this is not valid C++ from my understanding
(one of the other two lines is C++11, the other is pre-C++11).
g++ 4.7.2 rejects the line in question. clang 3.4 accepts it.</pre>
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