#include <iostream>
 
typedef int member_type;
 
struct base {
    base(base&&) { std::cout << "base moved\n"; }
    base(member_type&& m): member_(std::move(m)) { std::cout << "base inited\n"; }
    member_type member_;
};
 
struct virt_1: virtual base {
    virt_1(virt_1&& rhs): base(std::move(rhs)) {}
    virt_1(member_type&& m): base(std::move(m)) {}
};
 
struct virt_2: virtual base {
    virt_2(virt_2&& rhs): base(std::move(rhs)) {}
    virt_2(member_type&& m): base(std::move(m)) {}
};
 
struct concrete: virt_1, virt_2, private virtual base {
    concrete(concrete&& rhs) = default;
    concrete( int a ) : base( std::move( a ) ), virt_1( 1 ), virt_2( 2 ) {}
};
 
int main() {
    concrete a( 5 );
    concrete b = std::move( a );
}

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