Trait Prng

pub trait Prng {
    type Error;
    type Prng;

    // Required methods
    fn prng(&self) -> Result<&Self::Prng, Self::Error>;
    fn prng_mut(&mut self) -> Result<&mut Self::Prng, Self::Error>;
}

Interpreter global pseudorandom number generator (PRNG).

Implementations of this trait may be used as the backing pseudorandom number generator for Random::DEFAULT.

The PRNG used to implement this trait is not required to be cryptographically secure. For example, MRI’s PRNG is a variant of Mersenne Twister.

Required Associated Types

type Error

Concrete type for errors when retrieving the pseudorandom number generator.

type Prng

Concrete type for the interpreter pseudorandom number generator.

Required Methods

fn prng(&self) -> Result<&Self::Prng, Self::Error>

Return a shared reference to the interpreter pseudorandom number generator.

Errors

If the PRNG is inaccessible, an error is returned.

fn prng_mut(&mut self) -> Result<&mut Self::Prng, Self::Error>

Return a mutable reference to the interpreter pseudorandom number generator.

Errors

If the PRNG is inaccessible, an error is returned.

Implementors