[cfe-dev] Non Static Member Initialization and deleted copy constructor

[Howard Hinnant]

This looks wrong to me.  Is this a known bug?

#include <atomic>

//
// This class can compile
//
class Working
{
private:
    std::atomic<int> value_{0};
};

//
// This class cannot compile
//
template <typename Ty1>
class NotWorking
{
    private:
        std::atomic<int> value_{0}; // <---- error here
};

int main()
{
    Working working;
    NotWorking<int> not_working;
}

test.cpp:19:33: error: copying member subobject of type 'std::atomic<int>' invokes deleted constructor
        std::atomic<int> value_{0}; // <---- error here
                                ^
test.cpp:25:21: note: in instantiation of template class 'NotWorking<int>' requested here
    NotWorking<int> not_working;
                    ^
/Users/hhinnant/Development/temp_libcxx/include/atomic:721:7: note: copy constructor of 'atomic<int>' is implicitly deleted because base class
      '__atomic_base<int>' has a deleted copy constructor
    : public __atomic_base<_Tp>
      ^
/Users/hhinnant/Development/temp_libcxx/include/atomic:640:7: note: copy constructor of '__atomic_base<int, true>' is implicitly deleted because base class
      '__atomic_base<int, false>' has a deleted copy constructor
    : public __atomic_base<_Tp, false>
      ^
/Users/hhinnant/Development/temp_libcxx/include/atomic:625:5: note: function has been explicitly marked deleted here
    __atomic_base(const __atomic_base&) = delete;
    ^
1 error generated.

Thanks,
Howard