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<body><span class="vcard"><a class="email" href="mailto:akim.demaille@gmail.com" title="Akim Demaille <akim.demaille@gmail.com>"> <span class="fn">Akim Demaille</span></a>
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<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Unsafe perfect forwarding"
href="http://llvm.org/bugs/show_bug.cgi?id=20174">bug 20174</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>REOPENED
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<td style="text-align:right;">Resolution</td>
<td>INVALID
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Unsafe perfect forwarding"
href="http://llvm.org/bugs/show_bug.cgi?id=20174#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Unsafe perfect forwarding"
href="http://llvm.org/bugs/show_bug.cgi?id=20174">bug 20174</a>
from <span class="vcard"><a class="email" href="mailto:akim.demaille@gmail.com" title="Akim Demaille <akim.demaille@gmail.com>"> <span class="fn">Akim Demaille</span></a>
</span></b>
<pre>Hi Richard,
Thanks for your detailed comments. So it all boils down to the behavior of
std::tuple's constructor, which in the case of libc++, does not require the
same number of effective arguments as the size of the tuple.
#include <tuple>
int main()
{
std::tuple<int, int> t1(1);
}
I don't have the final C++11 standard, just a copy of the last draft, but
unless it changed quite late, I don't see how this is valid. 20.4.2.1 line 8
states that both parameter packs must have the same size.
I agree then that this would be rather a libc++ issue. Do you agree?</pre>
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