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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Wunused-private-field on member accessed via class template"
href="https://bugs.llvm.org/show_bug.cgi?id=47718">47718</a>
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<th>Summary</th>
<td>-Wunused-private-field on member accessed via class template
</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>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>
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<th>Priority</th>
<td>P
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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>ed@catmur.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>class C {
int i; // warning: private field 'i' is not used [-Wunused-private-field]
public:
template<class> struct S { C& c; };
template<class T> int f(S<T> s) { return ++s.c.i; }
};
<a href="https://godbolt.org/z/rnja44">https://godbolt.org/z/rnja44</a>
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
88c9162c9d47ef43a505bc5301dc626f3cd4f437)
note that barring weird specializations, s.c is a C lvalue, so I think this
should be regarded as a use of C::i.</pre>
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