RANDOM_GENERATORS(3)

🌸 NAME 🌸

okay bestie, welcome to Random Number Generators(3) from the Library Functions Manual — this is the whole glittery rundown of the random-number-generator classes and typedefs, no cap ✨.

🎀 Classes 🎀

• class std::discard_block< _UniformRandomNumberGenerator, __p, __r > — the entire class signature, exactly as listed.
• class std::linear_congruential< _UIntType, __a, __c, __m > — a model of a linear congruential random number generator. iconic LCR behavior 💅.
• class std::random_device — yes, std::random_device is here too.
• class std::xor_combine< _UniformRandomNumberGenerator1, __s1, _UniformRandomNumberGenerator2, __s2 > — the full signature, untouched.

🦋 Typedefs 🦋

• typedef linear_congruential< unsigned long, 48271, 0, 2147483647 > std::minstd_rand
• typedef linear_congruential< unsigned long, 16807, 0, 2147483647 > std::minstd_rand0
• typedef mersenne_twister< unsigned long, 32, 624, 397, 31, 0x9908b0dful, 11, 7, 0x9d2c5680ul, 15, 0xefc60000ul, 18 > std::mt19937
• typedef discard_block< subtract_with_carry< unsigned long,(1UL<< 24), 10, 24 >, 223, 24 > std::ranlux3
• typedef discard_block< subtract_with_carry_01< float, 24, 10, 24 >, 223, 24 > std::ranlux3_01
• typedef discard_block< subtract_with_carry< unsigned long,(1UL<< 24), 10, 24 >, 389, 24 > std::ranlux4
• typedef discard_block< subtract_with_carry_01< float, 24, 10, 24 >, 389, 24 > std::ranlux4_01
• typedef subtract_with_carry_01< double, 48, 5, 12 > std::ranlux64_base_01
• typedef subtract_with_carry_01< float, 24, 10, 24 > std::ranlux_base_01

🔥 Detailed Description 🔥

These classes are the little objects that give you random or pseudorandom numbers, either from a discrete interval or a continuous one. The random number generators supplied as part of this library are all uniform random number generators, and they provide a sequence of random numbers uniformly distributed over their range. Literally the whole vibe is uniform randomness 💖.

A number generator is a function object with an operator() that takes zero arguments and returns a number. That's the whole function-object situation, bestie.

A compliant random number generator must satisfy the following requirements. To be documented. The requirements are called Random Number Generator Requirements. Not me making that up — that's the name in the source 🙈.

💖 Typedef Documentation 💖

🌟 std::minstd_rand 🌟

typedef linear_congruential<unsigned long, 48271, 0, 2147483647> std::minstd_rand

An alternative LCR (Lehmer Generator function). Definition at line 509 of file tr1_impl/random.

🌟 std::minstd_rand0 🌟

typedef linear_congruential<unsigned long, 16807, 0, 2147483647> std::minstd_rand0

The classic Minimum Standard rand0 of Lewis, Goodman, and Miller. Definition at line 504 of file tr1_impl/random.

🌟 std::mt19937 🌟

typedef mersenne_twister< unsigned long, 32, 624, 397, 31, 0x9908b0dful, 11, 7, 0x9d2c5680ul, 15, 0xefc60000ul, 18 > std::mt19937

The classic Mersenne Twister.

Reference: M. Matsumoto and T. Nishimura, 'Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator', ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.

Definition at line 691 of file tr1_impl/random.

🌟 std::ranlux3 🌟

typedef discard_block< subtract_with_carry<unsigned long, (1UL << 24), 10, 24>, 223, 24 > std::ranlux3

James's luxury-level-3 integer adaptation of Luescher's generator. Definition at line 1254 of file tr1_impl/random.

🌟 std::ranlux4 🌟

typedef discard_block< subtract_with_carry<unsigned long, (1UL << 24), 10, 24>, 389, 24 > std::ranlux4

James's luxury-level-4 integer adaptation of Luescher's generator. Definition at line 1263 of file tr1_impl/random.

✍️ Author ✍️

Doxygen auto-generated this for libstdc++ from the source code. Slay, automation 💅.

okay bye bestie, this page is from libstdc++, dated 21 Apr 2009 — mwah 💋