Struct rand::rngs::StdRng

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pub struct StdRng(_);

[−] Expand description

The standard RNG. The PRNG algorithm in StdRng is chosen to be efficient on the current platform, to be statistically strong and unpredictable (meaning a cryptographically secure PRNG).

The current algorithm used is the ChaCha block cipher with 12 rounds. Please see this relevant rand issue for the discussion. This may change as new evidence of cipher security and performance becomes available.

The algorithm is deterministic but should not be considered reproducible due to dependence on configuration and possible replacement in future library versions. For a secure reproducible generator, we recommend use of the rand_chacha crate directly.

Trait Implementations

impl Clone for StdRng[+]

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fn clone(&self) -> StdRng[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl CryptoRng for StdRng

impl Debug for StdRng[+]

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

Formats the value using the given formatter.

impl Eq for StdRng

impl PartialEq<StdRng> for StdRng[+]

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fn eq(&self, other: &StdRng) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &StdRng) -> bool[−]

This method tests for !=.

impl RngCore for StdRng[+]

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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 StdRng[+]

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type Seed = <Rng as SeedableRng>::Seed

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

fn from_seed(seed: Self::Seed) -> Self[−]

Create a new PRNG using the given seed.

fn from_rng<R: RngCore>(rng: R) -> Result<Self, Error>[−]

Create a new PRNG seeded from another Rng.

pub fn seed_from_u64(state: u64) -> Self[−]

Create a new PRNG using a u64 seed.

pub fn from_entropy() -> Self[−]

Creates a new instance of the RNG seeded via getrandom.

impl StructuralEq for StdRng

impl StructuralPartialEq for StdRng