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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 - Rewritten comparison expression is not checked for SFINAE"
href="https://bugs.llvm.org/show_bug.cgi?id=47893">47893</a>
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<th>Summary</th>
<td>Rewritten comparison expression is not checked for SFINAE
</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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++2a
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>igor.akhmetov@gmail.com
</td>
</tr>
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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>
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<pre><a href="https://gcc.godbolt.org/z/zsbc1Y">https://gcc.godbolt.org/z/zsbc1Y</a>
Clang fails to substitute foo here, while it should have picked the second
overload because of SFINAE:
#include <compare>
struct X
{
void operator <=>(X const &) const {}
};
template<typename T, typename = decltype(T{} < T{})>
void foo(T t) {}
template<typename>
void foo(...);
void test()
{
foo<X>(X{});
}</pre>
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