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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Template deduction fails when deduction partially disabled"
href="https://bugs.llvm.org/show_bug.cgi?id=46551">46551</a>
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<th>Summary</th>
<td>Template deduction fails when deduction partially disabled
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>10.0
</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>normal
</td>
</tr>
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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
</td>
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<th>Reporter</th>
<td>kaba@hilvi.org
</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>
<div>
<pre>The following does not compile. Gcc 10.1 compiles successfully.
#include <type_traits>
template <typename T, int N = -1>
struct Span {
Span() {}
Span(const Span<std::remove_cvref_t<T>, N>&) {}
};
template <typename T, int N>
void f(Span<std::type_identity_t<const T>, N> a, T b) {}
int main()
{
f(Span<int>(), 1);
}</pre>
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