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<body><span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Conversion to T&& via user-defined conversion to const T rejected"
href="http://llvm.org/bugs/show_bug.cgi?id=22370">bug 22370</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>richard-llvm@metafoo.co.uk
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<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Conversion to T&& via user-defined conversion to const T rejected"
href="http://llvm.org/bugs/show_bug.cgi?id=22370#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Conversion to T&& via user-defined conversion to const T rejected"
href="http://llvm.org/bugs/show_bug.cgi?id=22370">bug 22370</a>
from <span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span></b>
<pre>Here's an example from the C++ standard, which is (up to naming) identical to
your attachment:
struct Banana { };
struct Enigma { operator const Banana(); };
Banana &&banana2 = Enigma(); // ill-formed
This was made ill-formed by the resolution of a DR (bugfix) applied
retroactively to C++11:
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1604">http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1604</a>
This agrees with the usual rule in C++: you only get one user-defined
conversion in an initialization; you don't get to call both Enigma::operator
const Banana() *and* the Banana copy constructor here.</pre>
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