Trait Rng 

pub trait Rng: TryRng<Error = Infallible> {
    // Required methods
    fn next_u32(&mut self) -> u32;
    fn next_u64(&mut self) -> u64;
    fn fill_bytes(&mut self, dst: &mut [u8]);
}

Trait for infallible random number generators

Rng is a sub-trait of TryRng for infallible generators.

Requirements

See TryRng#Requirements which also apply here.

Usage

The rand crate provides higher level functionality, for example generation of floating-point values, uniform ranged sampling and shuffling sequences. In particular, rand::RngExt is an extension trait over Rng providing many of the methods one might expect to be able to use on an RNG.

Implementing Rng

Implement TryRng with type Error = core::convert::Infallible.

Required Methods

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, dst: &mut [u8])

Fill dest with random data.

This method should guarantee that dest is entirely filled with new data, and may panic if this is impossible (e.g. reading past the end of a file that is being used as the source of randomness).

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<R> Rng for R

where R: TryRng<Error = Infallible> + ?Sized,