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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - static constepxr members of arguments passed by reference are not recognised as constexpr"
href="https://bugs.llvm.org/show_bug.cgi?id=46499">46499</a>
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<th>Summary</th>
<td>static constepxr members of arguments passed by reference are not recognised as constexpr
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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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>rogero@howzatt.co.uk
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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>clang does not appear to recognise that static constexpr members of arguments
passed by reference are constexpr.
template <int N>
struct A
{
static constexpr int size = N;
};
void foo(A<4> v) // By-value is OK
{
static_assert(v.size == 4);
}
void bar(A<4> & v) // By-ref is not
{
static_assert(v.size == 4); // clang error
}
See <a href="https://godbolt.org/z/sM2qhZ">https://godbolt.org/z/sM2qhZ</a></pre>
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