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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>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - clang raise error when compiling boost constant in constexpr"
href="http://llvm.org/bugs/show_bug.cgi?id=18798">bug 18798</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>NEW
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<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>INVALID
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - clang raise error when compiling boost constant in constexpr"
href="http://llvm.org/bugs/show_bug.cgi?id=18798#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - clang raise error when compiling boost constant in constexpr"
href="http://llvm.org/bugs/show_bug.cgi?id=18798">bug 18798</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>Aha, found a more complete testcase here:
<a href="http://stackoverflow.com/questions/21690154/clang-3-5-constexpr-inconsistency-errors-when-using-double-but-not-int">http://stackoverflow.com/questions/21690154/clang-3-5-constexpr-inconsistency-errors-when-using-double-but-not-int</a>
This is not a Clang bug: const doubles like 'boost::math::double_constants::pi'
can't be used in constant expressions.
The fact that GCC accepts is a bug in GCC: <a href="http://gcc.gnu.org/PR57979">http://gcc.gnu.org/PR57979</a></pre>
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