Struct rand::distributions::Standard[][src]

pub struct Standard;

A generic random value distribution, implemented for many primitive types. Usually generates values with a numerically uniform distribution, and with a range appropriate to the type.

Built-in Implementations

Assuming the provided Rng is well-behaved, these implementations generate values with the following ranges and distributions:

The following aggregate types also implement the distribution Standard as long as their component types implement it:

Example

use rand::prelude::*;
use rand::distributions::Standard;

let val: f32 = SmallRng::from_entropy().sample(Standard);
println!("f32 from [0, 1): {}", val);

Floating point implementation

The floating point implementations for Standard generate a random value in the half-open interval [0, 1), i.e. including 0 but not 1.

All values that can be generated are of the form n * ε/2. For f32 the 23 most significant random bits of a u32 are used and for f64 the 53 most significant bits of a u64 are used. The conversion uses the multiplicative method: (rng.gen::<$uty>() >> N) as $ty * (ε/2).

See also: Open01 which samples from (0, 1), OpenClosed01 which samples from (0, 1] and Rng::gen_range(0, 1) which also samples from [0, 1). Note that Open01 and gen_range (which uses Uniform) use transmute-based methods which yield 1 bit less precision but may perform faster on some architectures (on modern Intel CPUs all methods have approximately equal performance).

Trait Implementations

impl Distribution<f32> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<f64> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<u8> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<u16> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<u32> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<u64> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<u128> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<usize> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<i8> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<i16> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<i32> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<i64> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<i128> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<isize> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<char> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<bool> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Distribution<()> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A> Distribution<(A,)> for Standard where
    Standard: Distribution<A>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B> Distribution<(A, B)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C> Distribution<(A, B, C)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D> Distribution<(A, B, C, D)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E> Distribution<(A, B, C, D, E)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F> Distribution<(A, B, C, D, E, F)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G> Distribution<(A, B, C, D, E, F, G)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G, H> Distribution<(A, B, C, D, E, F, G, H)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>,
    Standard: Distribution<H>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G, H, I> Distribution<(A, B, C, D, E, F, G, H, I)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>,
    Standard: Distribution<H>,
    Standard: Distribution<I>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G, H, I, J> Distribution<(A, B, C, D, E, F, G, H, I, J)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>,
    Standard: Distribution<H>,
    Standard: Distribution<I>,
    Standard: Distribution<J>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G, H, I, J, K> Distribution<(A, B, C, D, E, F, G, H, I, J, K)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>,
    Standard: Distribution<H>,
    Standard: Distribution<I>,
    Standard: Distribution<J>,
    Standard: Distribution<K>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<A, B, C, D, E, F, G, H, I, J, K, L> Distribution<(A, B, C, D, E, F, G, H, I, J, K, L)> for Standard where
    Standard: Distribution<A>,
    Standard: Distribution<B>,
    Standard: Distribution<C>,
    Standard: Distribution<D>,
    Standard: Distribution<E>,
    Standard: Distribution<F>,
    Standard: Distribution<G>,
    Standard: Distribution<H>,
    Standard: Distribution<I>,
    Standard: Distribution<J>,
    Standard: Distribution<K>,
    Standard: Distribution<L>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 0]> for Standard
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 1]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 2]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 3]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 4]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 5]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 6]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 7]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 8]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 9]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 10]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 11]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 12]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 13]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 14]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 15]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 16]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 17]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 18]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 19]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 20]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 21]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 22]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 23]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 24]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 25]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 26]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 27]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 28]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 29]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 30]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 31]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<[T; 32]> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<Option<T>> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl<T> Distribution<Wrapping<T>> for Standard where
    Standard: Distribution<T>, 
[src]

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<'a, D, R, T>

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

impl Clone for Standard
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl Copy for Standard
[src]

impl Debug for Standard
[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl Send for Standard

impl Sync for Standard