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Struct std.random.LinearCongruentialEngine
Linear Congruential generator. When m = 0, no modulus is used.
struct LinearCongruentialEngine(UIntType, UIntType a, UIntType c, UIntType m)
if (isUnsigned!UIntType);
Constructors
Name | Description |
---|---|
this
(x0)
|
Constructs a LinearCongruentialEngine generator seeded with
x0 .
|
Properties
Name | Type | Description |
---|---|---|
front [get]
|
UIntType | Returns the current number in the random sequence. |
save [get]
|
typeof(this) |
Methods
Name | Description |
---|---|
popFront
()
|
Advances the random sequence. |
seed
(x0)
|
(Re)seeds the generator. |
Example
Declare your own linear congruential engine
alias CPP11LCG = LinearCongruentialEngine!(uint, 48271, 0, 2_147_483_647);
// seed with a constant
auto rnd = CPP11LCG(42);
auto n = rnd .front; // same for each run
writeln(n); // 2027382
Example
Declare your own linear congruential engine
// glibc's LCG
alias GLibcLCG = LinearCongruentialEngine!(uint, 1103515245, 12345, 2_147_483_648);
// Seed with an unpredictable value
auto rnd = GLibcLCG(unpredictableSeed);
auto n = rnd .front; // different across runs
Example
Declare your own linear congruential engine
// Visual C++'s LCG
alias MSVCLCG = LinearCongruentialEngine!(uint, 214013, 2531011, 0);
// seed with a constant
auto rnd = MSVCLCG(1);
auto n = rnd .front; // same for each run
writeln(n); // 2745024
Authors
Andrei Alexandrescu Masahiro Nakagawa (Xorshift random generator) Joseph Rushton Wakeling (Algorithm D for random sampling) Ilya Yaroshenko (Mersenne Twister implementation, adapted from mir-random)
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.