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template <typename T, int N> class Group
{
    public:
        T values[N];
 
        Group(T args[])
        {
            for (int i = 0; i < N; i++)
            {
                values[i] = args[i];
            }
        }
 
        Group()
        {
            this((T[]){0, 0, 0});
        }
};
 
int main()
{
    Group<double, 3> * v1 = new Group<double, 3>();
}

prog.cpp: In instantiation of ‘Group<T, N>::Group() [with T = double; int N = 3]’:
prog.cpp:22:50:   required from here
prog.cpp:16:17: error: expression cannot be used as a function
             this((T[]){0, 0, 0});
             ~~~~^~~~~~~~~~~~~~~~

Standard output is empty