1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <random> 11 12 // template <class UIntType, size_t w, size_t n, size_t m, size_t r, 13 // UIntType a, size_t u, UIntType d, size_t s, 14 // UIntType b, size_t t, UIntType c, size_t l, UIntType f> 15 // class mersenne_twister_engine 16 // { 17 // public: 18 // // types 19 // typedef UIntType result_type; 20 // 21 // // engine characteristics 22 // static constexpr size_t word_size = w; 23 // static constexpr size_t state_size = n; 24 // static constexpr size_t shift_size = m; 25 // static constexpr size_t mask_bits = r; 26 // static constexpr result_type xor_mask = a; 27 // static constexpr size_t tempering_u = u; 28 // static constexpr result_type tempering_d = d; 29 // static constexpr size_t tempering_s = s; 30 // static constexpr result_type tempering_b = b; 31 // static constexpr size_t tempering_t = t; 32 // static constexpr result_type tempering_c = c; 33 // static constexpr size_t tempering_l = l; 34 // static constexpr result_type initialization_multiplier = f; 35 // static constexpr result_type min () { return 0; } 36 // static constexpr result_type max() { return 2^w - 1; } 37 // static constexpr result_type default_seed = 5489u; 38 39 #include <random> 40 #include <type_traits> 41 #include <cassert> 42 43 template <class _Tp> 44 void where(const _Tp &) {} 45 46 void 47 test1() 48 { 49 typedef std::mt19937 E; 50 static_assert((E::word_size == 32), ""); 51 static_assert((E::state_size == 624), ""); 52 static_assert((E::shift_size == 397), ""); 53 static_assert((E::mask_bits == 31), ""); 54 static_assert((E::xor_mask == 0x9908b0df), ""); 55 static_assert((E::tempering_u == 11), ""); 56 static_assert((E::tempering_d == 0xffffffff), ""); 57 static_assert((E::tempering_s == 7), ""); 58 static_assert((E::tempering_b == 0x9d2c5680), ""); 59 static_assert((E::tempering_t == 15), ""); 60 static_assert((E::tempering_c == 0xefc60000), ""); 61 static_assert((E::tempering_l == 18), ""); 62 static_assert((E::initialization_multiplier == 1812433253), ""); 63 /*static_*/assert((E::min() == 0)/*, ""*/); 64 /*static_*/assert((E::max() == 0xFFFFFFFF)/*, ""*/); 65 static_assert((E::default_seed == 5489u), ""); 66 where(E::word_size); 67 where(E::state_size); 68 where(E::shift_size); 69 where(E::mask_bits); 70 where(E::xor_mask); 71 where(E::tempering_u); 72 where(E::tempering_d); 73 where(E::tempering_s); 74 where(E::tempering_b); 75 where(E::tempering_t); 76 where(E::tempering_c); 77 where(E::tempering_l); 78 where(E::initialization_multiplier); 79 where(E::default_seed); 80 } 81 82 void 83 test2() 84 { 85 typedef std::mt19937_64 E; 86 static_assert((E::word_size == 64), ""); 87 static_assert((E::state_size == 312), ""); 88 static_assert((E::shift_size == 156), ""); 89 static_assert((E::mask_bits == 31), ""); 90 static_assert((E::xor_mask == 0xb5026f5aa96619e9ull), ""); 91 static_assert((E::tempering_u == 29), ""); 92 static_assert((E::tempering_d == 0x5555555555555555ull), ""); 93 static_assert((E::tempering_s == 17), ""); 94 static_assert((E::tempering_b == 0x71d67fffeda60000ull), ""); 95 static_assert((E::tempering_t == 37), ""); 96 static_assert((E::tempering_c == 0xfff7eee000000000ull), ""); 97 static_assert((E::tempering_l == 43), ""); 98 static_assert((E::initialization_multiplier == 6364136223846793005ull), ""); 99 /*static_*/assert((E::min() == 0)/*, ""*/); 100 /*static_*/assert((E::max() == 0xFFFFFFFFFFFFFFFFull)/*, ""*/); 101 static_assert((E::default_seed == 5489u), ""); 102 where(E::word_size); 103 where(E::state_size); 104 where(E::shift_size); 105 where(E::mask_bits); 106 where(E::xor_mask); 107 where(E::tempering_u); 108 where(E::tempering_d); 109 where(E::tempering_s); 110 where(E::tempering_b); 111 where(E::tempering_t); 112 where(E::tempering_c); 113 where(E::tempering_l); 114 where(E::initialization_multiplier); 115 where(E::default_seed); 116 } 117 118 int main() 119 { 120 test1(); 121 test2(); 122 } 123
