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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - constexpr does not work with placement new"
href="http://llvm.org/bugs/show_bug.cgi?id=19685">19685</a>
</td>
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<tr>
<th>Summary</th>
<td>constexpr does not work with placement new
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.4
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ytj000@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#include <stddef.h>
constexpr void* operator new(size_t, int*) noexcept {
return nullptr;
}
int main() {
int* p = new (nullptr) int; // This is Okay
constexpr int* q = new (nullptr) int; // gcc works, clang compile
error
return *(p = q);
}
This code compiles with gcc 4.6, 4.7, 4.8, 4.9 and generates correct assembly
(with command line option "-std=c++0x")
It doesn't compile with clang 3.0, 3.2, 3.3, 3.4
(tried "-std=c++1y", "-std=c++11" and "-std=c++0x", none of them works)
Tested by Compiler Explorer: <a href="http://goo.gl/bmGtbR">http://goo.gl/bmGtbR</a></pre>
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