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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 - decltype(-9223372036854775808) is unsigned instead of signed"
href="http://llvm.org/bugs/show_bug.cgi?id=16983">bug 16983</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<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
</td>
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<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 - decltype(-9223372036854775808) is unsigned instead of signed"
href="http://llvm.org/bugs/show_bug.cgi?id=16983#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - decltype(-9223372036854775808) is unsigned instead of signed"
href="http://llvm.org/bugs/show_bug.cgi?id=16983">bug 16983</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>This code is ill-formed, because 9223372036854775808 does not fit into the
largest signed integer type. We accept it as a GNU extension, and that
extension gives it an unsigned type. (Note that we do not treat __int128 as an
extended integer type, since that would be an ABI-breaking change, so we cannot
give the integer literal that type.)
Unary - preserves the promoted type of its operand, so the resulting decltype
type is also unsigned.
The only bug I can find here is that -pedantic-errors doesn't reject this code.</pre>
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