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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 - noexcept should check whether the expression is a constant expression"
href="https://bugs.llvm.org/show_bug.cgi?id=15481">bug 15481</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</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 - noexcept should check whether the expression is a constant expression"
href="https://bugs.llvm.org/show_bug.cgi?id=15481#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - noexcept should check whether the expression is a constant expression"
href="https://bugs.llvm.org/show_bug.cgi?id=15481">bug 15481</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>Conclusion from CWG discussion: we're going to keep this as-is. "noexcept" has
no special rule for constant expressions.
It turns out this is actually essential for proper library functionality: eg,
if noexcept tries evaluating its operand, then (for example)
is_nothrow_swappable is broken by making std::swap constexpr, because
std::swap<T> then often ends up getting instantiated before T is complete.
As a result of that, I'm also going to consider this change as an effective DR
against C++11 and C++14... but I'm open to reconsidering if we see many user
complaints.</pre>
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