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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Weird behavior of implicit copy ctor with c++11"
href="http://llvm.org/bugs/show_bug.cgi?id=16042">16042</a>
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<th>Summary</th>
<td>Weird behavior of implicit copy ctor with c++11
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</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>C++11
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>gael.guennebaud@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=10534" name="attach_10534" title="Demonstration of the issue">attachment 10534</a> <a href="attachment.cgi?id=10534&action=edit" title="Demonstration of the issue">[details]</a></span>
Demonstration of the issue
The attached example produces the following error when compiled with
-std=c++11:
error: no viable conversion from 'Foo' to 'Bar'
note: candidate constructor (the implicit copy constructor) not viable: no
known conversion from 'Foo' to 'const Bar &' for 1st argument
However, it does compile fine if the default copy ctor is explicitly defined
with (line 6):
Bar( Bar const & ) = default;
This example also compiles file with -std=c++98 as well as with a recent g++
and -std=c++11.
This issue is pretty annoying when you replace Bar by, e.g., std::complex for
which we cannot explicitly add a copy ctor.</pre>
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