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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - operator== is not emitted when != is used with templates/member variables involved."
href="https://bugs.llvm.org/show_bug.cgi?id=52537">52537</a>
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<th>Summary</th>
<td>operator== is not emitted when != is used with templates/member variables involved.
</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>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++2a
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>mcypark@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>This problem was encountered with `std::function`, but here's a smaller repro:
```
template <typename T>
struct function {};
template <typename T>
bool operator==(const function<T>&, int) { return true; }
struct S {
template <typename T>
bool f() const { return f_ != 0; }
function<int> f_;
};
int main() {
return S{}.f<int>();
}
```
This results in:
```
<source>:9: undefined reference to `bool operator==<int>(function<int> const&,
int)'
clang-14: error: linker command failed with exit code 1 (use -v to see
invocation)
```
[Godbolt Repro](<a href="https://godbolt.org/z/djG3b4Y6o">https://godbolt.org/z/djG3b4Y6o</a>)</pre>
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