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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang gives poor warnings messages on implicitly-deleted explicitly-defaulted move assignment operator (and others) - gcc warnings much better"
href="https://llvm.org/bugs/show_bug.cgi?id=28741">28741</a>
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<th>Summary</th>
<td>Clang gives poor warnings messages on implicitly-deleted explicitly-defaulted move assignment operator (and others) - gcc warnings much better
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.8
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>xaxxon@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#include <utility>
#include <vector>
using namespace std;
struct A {
int& x;
A(A&&)=default;
A& operator=(A&&) = default;
A(int& x) : x(x) { }
};
vector<A> avec;
int main() {
avec.erase(avec.begin());
}
Live: <a href="https://godbolt.org/g/uiXrpK">https://godbolt.org/g/uiXrpK</a>
GCC says:
8 : note: 'A& A::operator=(A&&)' is implicitly deleted because the default
definition would be ill-formed:
A& operator=(A&&) = default;
Clang says: !!note: copy assignment operator is implicitly deleted because 'A'
has a user-declared move constructor
8
Clang doesn't even mention your move assignment being deleted, it just skips
straight to the copy assignment not being available.</pre>
</div>
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