pub trait RandomnessSource: Default {
type TNumber: Number;
// Required method
fn next_number(&mut self) -> Self::TNumber;
// Provided method
fn fill_bytes(&mut self, bytes: &mut [u8]) { ... }
}Expand description
Simple trait for randomness source.
This looks (and in fact is)
the same as PseudoRandomNumberGenerator, however it is distinguished
by the way it works. It is allowed for implementors of this trait
to be inefficient, but have potentially better randomness (e.g. by
reading from appropriate hardware source).
It is also a good idea to seed PseudoRandomNumberGenerator objects
with whatever RandomnessSource returns.
In its essence this is the same as PseudoRandomNumberGenerator.
We distinguish those types mostly for type safety. These
have different purposes.
Required Associated Types§
Required Methods§
Sourcefn next_number(&mut self) -> Self::TNumber
fn next_number(&mut self) -> Self::TNumber
Returns the next random number.
Provided Methods§
Sourcefn fill_bytes(&mut self, bytes: &mut [u8])
fn fill_bytes(&mut self, bytes: &mut [u8])
Fills the given mut slice with random bytes.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.