Struct rand::rngs::mock::StepRng

pub struct StepRng { /* fields omitted */ }

A simple implementation of RngCore for testing purposes.

This generates an arithmetic sequence (i.e. adds a constant each step) over a u64 number, using wrapping arithmetic. If the increment is 0 the generator yields a constant.

use rand::Rng;
use rand::rngs::mock::StepRng;

let mut my_rng = StepRng::new(2, 1);
let sample: [u64; 3] = my_rng.gen();
assert_eq!(sample, [2, 3, 4]);

Implementations

impl StepRng

pub fn new(initial: u64, increment: u64) -> Self

Create a StepRng, yielding an arithmetic sequence starting with initial and incremented by increment each time.

Trait Implementations

impl Clone for StepRng

pub fn clone(&self) -> StepRng

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StepRng

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StepRng

pub fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Eq for StepRng

impl PartialEq<StepRng> for StepRng

pub fn eq(&self, other: &StepRng) -> bool

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

pub fn ne(&self, other: &StepRng) -> bool

This method tests for !=.

impl RngCore for StepRng

pub fn next_u32(&mut self) -> u32

Return the next random u32.

pub fn next_u64(&mut self) -> u64

Return the next random u64.

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

Fill dest with random data.

pub fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data.

impl Serialize for StepRng

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

Serialize this value into the given Serde serializer.

impl StructuralEq for StepRng

impl StructuralPartialEq for StepRng