struct A {
        A(int i):_i(i){ cout << "A(int)" << endl; }
        A(const A& a){ cout << "A(const A&)" << endl; }
        ~A(){ cout << "~A()" << endl; }
        
        int _i;
    };

    int main(){
        boost::array<A, 2> ta = {{1, 2}};
    }

A(int)
A(const A&)
A(int)
A(const A&)
~A()
~A()
~A()
~A()