[][src]Struct rand_pcg::Lcg128Xsl64

pub struct Lcg128Xsl64 { /* fields omitted */ }

A PCG random number generator (XSL RR 128/64 (LCG) variant).

Permuted Congruential Generator with 128-bit state, internal Linear Congruential Generator, and 64-bit output via "xorshift low (bits), random rotation" output function.

This is a 128-bit LCG with explicitly chosen stream with the PCG-XSL-RR output function. This combination is the standard pcg64.

Despite the name, this implementation uses 32 bytes (256 bit) space comprising 128 bits of state and 128 bits stream selector. These are both set by SeedableRng, using a 256-bit seed.


impl Lcg128Xsl64[src]

pub fn new(state: u128, stream: u128) -> Self[src]

Construct an instance compatible with PCG seed and stream.

Note that PCG specifies default values for both parameters:

  • state = 0xcafef00dd15ea5e5
  • stream = 0xa02bdbf7bb3c0a7ac28fa16a64abf96

Trait Implementations

impl Debug for Lcg128Xsl64[src]

impl Clone for Lcg128Xsl64[src]

impl RngCore for Lcg128Xsl64[src]

impl SeedableRng for Lcg128Xsl64[src]

We use a single 255-bit seed to initialise the state and select a stream. One seed bit (lowest bit of seed[8]) is ignored.

type Seed = [u8; 32]

Seed type, which is restricted to types mutably-dereferencable as u8 arrays (we recommend [u8; N] for some N). Read more

Auto Trait Implementations

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impl<T> From<T> for T[src]

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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> Into<U> for T where
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

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