Struct SeededRng

pub struct SeededRng { /* private fields */ }

The Rng of production code: SplitMix64, seeded once.

new takes the seed, which makes the whole sequence reproducible: the same seed always yields the same values in the same order. Default takes its seed from the entropy the standard library uses to seed HashMap, which is best effort, unpredictable in practice but neither reproducible nor guaranteed by anything.

SplitMix64 is a fast statistical generator, not a cryptographic one.

Implementations

impl SeededRng

pub fn new(seed: u64) -> Self

Builds a generator producing the sequence of seed, reproducibly.

Trait Implementations

impl Debug for SeededRng

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

Formats the value using the given formatter.

impl Default for SeededRng

fn default() -> Self

Returns the “default value” for a type.

impl Rng for SeededRng

fn next_u64(&self) -> u64

The next value of the sequence, uniform over the whole u64 range.

fn next_u32(&self) -> u32

The next value of the sequence, uniform over the whole u32 range.