Struct SystemRng 

pub struct SystemRng { /* private fields */ }

The default Rng: a SplitMix64 PRNG seeded from the standard library’s process-randomized hasher state. Non-cryptographic — it exists only to jitter timings.

Implementations

impl SystemRng

pub fn new() -> Self

Builds a generator with a fresh, process-randomized seed.

pub fn with_seed(seed: u64) -> Self

Builds a generator from an explicit seed (deterministic; used in tests).

Trait Implementations

impl Clone for SystemRng

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SystemRng

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

Formats the value using the given formatter.

impl Default for SystemRng

fn default() -> Self

Returns the “default value” for a type.

impl Rng for SystemRng

fn next_f64(&mut self) -> f64

Returns the next uniform value in [0, 1).