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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - templated constexpr constant in a template fails to deduce auto type"
href="https://bugs.llvm.org/show_bug.cgi?id=43459">43459</a>
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<th>Summary</th>
<td>templated constexpr constant in a template fails to deduce auto type
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>9.0
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++17
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>arbmind@gmail.com
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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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<pre>The following code compiled on clang 8 and is now wrong in clang 9.
See: <a href="https://godbolt.org/z/WdLl4c">https://godbolt.org/z/WdLl4c</a>
template<class>
struct Template {
template<typename>
static constexpr auto type_v = 0;
};
using T = Template<int>;
static_assert(T::type_v<int> == 0);
error: invalid operands to binary expression ('const auto' and 'int')
It seems the 'const auto' was never resolved to the real type.</pre>
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