Struct SplitMix64 

pub struct SplitMix64 { /* private fields */ }

A portable, deterministic PRNG (SplitMix64).

SplitMix64 is a well-known generator whose output is defined entirely by wrapping u64 arithmetic with fixed constants, so it can be re-implemented identically in any language. simu uses it as the shared “external feed” that lets a Rust run and a Python run draw the same number stream from the same seed.

It is fast and has good statistical quality for simulation, but it is not cryptographically secure — do not use it where unpredictability matters.

Implementations

impl SplitMix64

pub fn new(seed: u64) -> Self

Create a feed seeded with seed.

pub fn set_seed(&mut self, seed: u64)

Reset the feed to seed, restarting the stream from the beginning.

Trait Implementations

impl Clone for SplitMix64

fn clone(&self) -> SplitMix64

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SplitMix64

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

Formats the value using the given formatter.

impl RandomSource for SplitMix64

fn reseed(&mut self, seed: u64)

Re-seed the source deterministically, restarting its stream.

impl RngCore for SplitMix64

fn next_u64(&mut self) -> u64

Return the next random u64.

fn next_u32(&mut self) -> u32

Return the next random u32.

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

Fill dest with random data.