Struct WyRand 

pub struct WyRand { /* private fields */ }

A Pseudorandom Number generator, powered by the wyrand algorithm. This generator is based on the final v4.2 reference implementation.

Implementations

impl WyRand

pub const fn new(state: u64) -> WyRand

Creates a new WyRand instance with the provided seed. Be sure to obtain the seed value from a good entropy source, either from hardware, OS source, or from a suitable crate, like getrandom.

pub fn rand(&mut self) -> u64

Generates a random u64 value and advances the PRNG state.

pub const fn gen_u64(seed: u64) -> (u64, u64)

Const WyRand generator. Generates and returns a random u64 value first and then the advanced state second.

use wyrand::WyRand;

let seed = 123;

let (random_value, new_state) = WyRand::gen_u64(seed);

assert_ne!(random_value, 0);
// The original seed now no longer matches the new state.
assert_ne!(new_state, seed);

Trait Implementations

impl Clone for WyRand

fn clone(&self) -> WyRand

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WyRand

Available on crate feature debug only.

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for WyRand

fn eq(&self, other: &WyRand) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RngCore for WyRand

Available on crate feature rand_core only.

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data.

impl SeedableRng for WyRand

Available on crate feature rand_core only.

type Seed = [u8; 8]

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

fn from_seed(seed: <WyRand as SeedableRng>::Seed) -> WyRand

Create a new PRNG using the given seed.

fn seed_from_u64(state: u64) -> Self

Create a new PRNG using a u64 seed.

fn from_rng<R>(rng: R) -> Result<Self, Error>

where R: RngCore,

Create a new PRNG seeded from another Rng.

impl Eq for WyRand

impl StructuralPartialEq for WyRand