13 lines · c
1namespace std {2 template<typename> struct mersenne_twister_engine {3 friend bool operator==(const mersenne_twister_engine &,4 const mersenne_twister_engine &) {5 return false;6 }7 };8 struct random_device {9 mersenne_twister_engine<int> mt; // require complete type10 };11}12 13