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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - declaration has a different exception specifier"
href="https://bugs.llvm.org/show_bug.cgi?id=38141">38141</a>
</td>
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<tr>
<th>Summary</th>
<td>declaration has a different exception specifier
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zhonghao@pku.org.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The code is as follows:
template < typename > struct traits;
template < typename T > struct X
{
X & operator = (X &&) noexcept (traits < T >::foo ());
};
template < typename T >
X < T > &
X < T >::operator = (X &&) noexcept (traits < T >::bar ())
{
return *this;
}
clang++ accepts the code, but g++ rejects it:
1reducedtestcasefromg++.dgcpp0xnoexcept28.C.cpp:10:1: error: declaration of
'X<T>& X<T>::operator=(X<T>&&) noexcept (traits<T>::bar())' has a different
exception specifier
X < T >::operator = (X &&) noexcept (traits < T >::bar ())
^~~~~~~
1reducedtestcasefromg++.dgcpp0xnoexcept28.C.cpp:5:7: note: from previous
declaration 'X<T>& X<T>::operator=(X<T>&&) noexcept (traits<T>::foo())'
X & operator = (X &&) noexcept (traits < T >::foo ());
^~~~~~~~
This code looks invalid, right?</pre>
</div>
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