Struct RngState 

pub struct RngState {
    pub seed: [u8; 32],
    pub stream: u64,
    pub word_pos: u128,
}

Serializable snapshot of a SeededRng’s position in its stream.

ChaCha20 is a counter-based stream cipher, so its entire state is the 256-bit seed, the 64-bit stream selector, and the 64-bit word position within the keystream. Capturing those three reproduces the identical subsequent draw sequence on SeededRng::restore.

Fields

seed: [u8; 32]

The 32-byte ChaCha20 key/seed.

stream: u64

Stream selector — distinguishes independent substreams produced by SeededRng::split.

word_pos: u128

Word position within the keystream (block counter * 16 + offset).

Trait Implementations

impl Clone for RngState

fn clone(&self) -> RngState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RngState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RngState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for RngState

fn eq(&self, other: &RngState) -> 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 Serialize for RngState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for RngState

impl StructuralPartialEq for RngState