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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DR1358: if an instantiated constexpr function template doesn't satisfy the constexpr requirements, we should not allow it to be called in a constant expression"
href="http://llvm.org/bugs/show_bug.cgi?id=16448">16448</a>
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<th>Summary</th>
<td>DR1358: if an instantiated constexpr function template doesn't satisfy the constexpr requirements, we should not allow it to be called in a constant expression
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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
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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, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>Example:
struct S { virtual int f(); };
template<typename T> struct X : T {
constexpr X() {}
double d = 0.0;
constexpr int f() { return sizeof(T); }
};
constexpr X<X<S> > xxs;
constexpr const X<S> *p = &xxs;
static_assert(p->f() == sizeof(X<S>), "");
Clang accepts this but the static_assert fails, because the call is made
non-virtually. Per core issue DR1358, evaluation of a call to a constexpr
constructor temploid whose specialization does not obey the constexpr rules is
supposed to fail.</pre>
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