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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - errors of implicitly-deleted default constructor"
href="https://bugs.llvm.org/show_bug.cgi?id=47246">47246</a>
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<th>Summary</th>
<td>errors of implicitly-deleted default constructor
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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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
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<th>Reporter</th>
<td>tangyixuan@mail.dlut.edu.cn
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>The following code(valid) is accepted by g++, clang++ rejects it:
$ cat s.C
template<typename T>
struct A
{
A() = default;
A(A&&) = default;
A(const A&) = default;
T t;
};
struct B {
B() = default;
B(const B&){}
B(B&&) = default;
};
typedef A<const B> C;
C get() { return C(); }
int main() {}
$ clang++ -c s.C
s.C:18:18: error: call to implicitly-deleted default constructor of 'C' (aka
'A<const B>')
C get() { return C(); }
^
s.C:4:3: note: explicitly defaulted function was implicitly deleted here
A() = default;
^
s.C:7:5: note: default constructor of 'A<const B>' is implicitly deleted
because field 't' of const-qualified type 'const B' would not be initialized
T t;
^
1 error generated.</pre>
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