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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - false-positive -Wunused-local-typedef warning for use in dependent scope specifier"
href="https://bugs.llvm.org/show_bug.cgi?id=46424">46424</a>
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<th>Summary</th>
<td>false-positive -Wunused-local-typedef warning for use in dependent scope specifier
</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>PC
</td>
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<th>OS</th>
<td>All
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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>C++11
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Testcase from Jens Maurer:
template <class T>
struct B
{
void f();
};
template <class T>
struct D : public B<T>
{
using Base = B<T>;
void f();
};
template <class T>
void g()
{
D<T> d;
using X = typename D<T>::Base;
d.X::f();
}
... produces a bogus warning:
<source>:17:10: warning: unused type alias 'X' [-Wunused-local-typedef]
using X = typename D<T>::Base;
^
(Presumably we are not marking the FirstQualifierInScope as referenced after
doing the fallback lookup for X when parsing g().)</pre>
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