<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Non-type template parameter with const-qualification is no longer matched by specialization"
href="https://bugs.llvm.org/show_bug.cgi?id=41829">41829</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Non-type template parameter with const-qualification is no longer matched by specialization
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++'17
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tadeus.prastowo@unitn.it
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>The following MWE works in GCC C++17 but not Clang C++17 (see
<a href="https://www.godbolt.org/z/ME1Xoa">https://www.godbolt.org/z/ME1Xoa</a>):
-- 8< --
template<typename T, T v>
struct X {
};
template<typename T>
struct Y {
static constexpr int a = 1;
};
template<typename T, T v>
struct Y<X<T, v>> {
static constexpr int a = 2;
};
static_assert(Y<X<const int, 10>>::a == 2, "1");
int main() {
}
-- 8< --
The MWE should work in Clang C++17 because it works in Clang C++14. The
following bug report may be related:
<a class="bz_bug_link
bz_status_NEW "
title="NEW - non-type template-parameter of reference type confuses template specialization matching"
href="show_bug.cgi?id=40983">https://bugs.llvm.org/show_bug.cgi?id=40983</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>