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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Eager instantiation of constexpr variables fails if constexpr qualifier is added by static data member definition"
href="https://llvm.org/bugs/show_bug.cgi?id=24541">24541</a>
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<th>Summary</th>
<td>Eager instantiation of constexpr variables fails if constexpr qualifier is added by static data member definition
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Consider:
template < class T >
struct Foo {
T v;
constexpr Foo() : v(){}
static const Foo f;
};
template < class T >
constexpr const Foo<T> Foo<T>::f = Foo();
std::array<int, Foo<std::size_t>::f.v> a;
Clang rejects this, because it doesn't eagerly instantiate Foo<size_t>::f,
presumably because the constexpr specifier isn't seen until the out-of-line
definition is instantiated.</pre>
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