Struct rand::read::ReadRng

pub struct ReadRng<R> { /* fields omitted */ }

An RNG that reads random bytes straight from a Read. This will work best with an infinite reader, but this is not required.

Panics

It will panic if it there is insufficient data to fulfill a request.

Example

use rand::{read, SampleRng};

let data = vec![1, 2, 3, 4, 5, 6, 7, 8];
let mut rng = read::ReadRng::new(&data[..]);
println!("{:x}", rng.gen::<u32>());

Methods

impl<R: Read> ReadRng<R>

pub fn new(r: R) -> ReadRng<R>

Create a new ReadRng from a Read.

Trait Implementations

impl<R: Debug> Debug for ReadRng<R>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<R: Read> Rng for ReadRng<R>

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.

fn next_f32(&mut self) -> f32

Return the next random f32 selected from the half-open interval [0, 1).

fn next_f64(&mut self) -> f64

Return the next random f64 selected from the half-open interval [0, 1).