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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missing const in is_copy_constructible/assignable"
href="http://llvm.org/bugs/show_bug.cgi?id=20836">20836</a>
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<th>Summary</th>
<td>Missing const in is_copy_constructible/assignable
</td>
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<th>Product</th>
<td>libc++
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</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
</td>
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>kaballo86@hotmail.com
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</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12977" name="attach_12977" title="proposed fix">attachment 12977</a> <a href="attachment.cgi?id=12977&action=edit" title="proposed fix">[details]</a></span>
proposed fix
The implementations of copy-constructible/assignable related traits apply const
to a reference type, which is ignored. This results in the following assertions
firing when they should hold:
#include <type_traits>
struct T {
T(T&) = default;
T& operator=(T&) = default;
};
int main() {
static_assert(!std::is_copy_assignable<T>::value, "is_copy_assignable");
static_assert(!std::is_nothrow_copy_assignable<T>::value,
"is_nothrow_copy_assignable");
static_assert(!std::is_copy_constructible<T>::value,
"is_copy_constructible");
static_assert(!std::is_nothrow_copy_constructible<T>::value,
"is_nothrow_copy_constructible");
}</pre>
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