Trait rand::Rand
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pub trait Rand { fn rand<R>(rng: &mut R) -> Self
where
R: Rng; }
A type that can be randomly generated using an Rng
.
Built-in Implementations
This crate implements Rand
for various primitive types. Assuming the
provided Rng
is well-behaved, these implementations generate values with
the following ranges and distributions:
- Integers (
i32
,u32
,isize
,usize
, etc.): Uniformly distributed over all values of the type. char
: Uniformly distributed over all Unicode scalar values, i.e. all code points in the range0...0x10_FFFF
, except for the range0xD800...0xDFFF
(the surrogate code points). This includes unassigned/reserved code points.bool
: Generatesfalse
ortrue
, each with probability 0.5.- Floating point types (
f32
andf64
): Uniformly distributed in the half-open range[0, 1)
. (TheOpen01
,Closed01
,Exp1
, andStandardNormal
wrapper types produce floating point numbers with alternative ranges or distributions.)
The following aggregate types also implement Rand
as long as their
component types implement it:
- Tuples and arrays: Each element of the tuple or array is generated
independently, using its own
Rand
implementation. Option<T>
: ReturnsNone
with probability 0.5; otherwise generates a randomT
and returnsSome(T)
.
Required Methods
fn rand<R>(rng: &mut R) -> Self where
R: Rng,
R: Rng,
Generates a random instance of this type using the specified source of randomness.
Implementations on Foreign Types
impl<T> Rand for [T; 29] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 31] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 8] where
T: Rand,
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T: Rand,
impl Rand for usize
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impl<T> Rand for [T; 16] where
T: Rand,
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T: Rand,
impl<A, B> Rand for (A, B) where
A: Rand,
B: Rand,
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A: Rand,
B: Rand,
impl Rand for i64
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impl<T> Rand for [T; 10] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 25] where
T: Rand,
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T: Rand,
impl Rand for ()
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impl<T> Rand for [T; 1] where
T: Rand,
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T: Rand,
impl<A, B, C, D, E, F, G> Rand for (A, B, C, D, E, F, G) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
impl Rand for bool
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impl<A, B, C, D, E> Rand for (A, B, C, D, E) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
impl<A, B, C> Rand for (A, B, C) where
A: Rand,
B: Rand,
C: Rand,
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A: Rand,
B: Rand,
C: Rand,
impl<T> Rand for [T; 13] where
T: Rand,
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T: Rand,
impl<A> Rand for (A,) where
A: Rand,
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A: Rand,
impl<T> Rand for [T; 22] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 9] where
T: Rand,
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T: Rand,
impl<A, B, C, D, E, F> Rand for (A, B, C, D, E, F) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
impl<T> Rand for [T; 21] where
T: Rand,
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T: Rand,
impl<A, B, C, D, E, F, G, H, I, J, K> Rand for (A, B, C, D, E, F, G, H, I, J, K) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
K: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
K: Rand,
impl<A, B, C, D, E, F, G, H, I> Rand for (A, B, C, D, E, F, G, H, I) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
impl<A, B, C, D> Rand for (A, B, C, D) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
impl<T> Rand for [T; 26] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 6] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 7] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 28] where
T: Rand,
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T: Rand,
impl<A, B, C, D, E, F, G, H> Rand for (A, B, C, D, E, F, G, H) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
impl<T> Rand for [T; 4] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 15] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 18] where
T: Rand,
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T: Rand,
impl Rand for u8
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impl<T> Rand for [T; 0]
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impl<T> Rand for [T; 2] where
T: Rand,
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T: Rand,
impl Rand for u32
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impl Rand for i32
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impl<T> Rand for [T; 5] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 14] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 27] where
T: Rand,
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T: Rand,
impl Rand for f64
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impl<T> Rand for [T; 20] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 23] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 12] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 19] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 17] where
T: Rand,
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T: Rand,
impl Rand for isize
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impl Rand for i8
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impl Rand for char
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impl<A, B, C, D, E, F, G, H, I, J, K, L> Rand for (A, B, C, D, E, F, G, H, I, J, K, L) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
K: Rand,
L: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
K: Rand,
L: Rand,
impl<T> Rand for [T; 11] where
T: Rand,
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T: Rand,
impl Rand for u64
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impl<T> Rand for [T; 3] where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 24] where
T: Rand,
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T: Rand,
impl<T> Rand for Option<T> where
T: Rand,
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T: Rand,
impl<T> Rand for [T; 32] where
T: Rand,
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T: Rand,
impl Rand for u16
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impl Rand for i16
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impl Rand for f32
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impl<A, B, C, D, E, F, G, H, I, J> Rand for (A, B, C, D, E, F, G, H, I, J) where
A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
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A: Rand,
B: Rand,
C: Rand,
D: Rand,
E: Rand,
F: Rand,
G: Rand,
H: Rand,
I: Rand,
J: Rand,
impl<T> Rand for [T; 30] where
T: Rand,
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T: Rand,
Implementors
impl Rand for Open01<f32>
impl Rand for Open01<f64>
impl Rand for Closed01<f32>
impl Rand for IsaacRng
impl Rand for Exp1
impl Rand for XorShiftRng
impl Rand for ChaChaRng
impl Rand for Closed01<f64>
impl Rand for StandardNormal
impl Rand for Isaac64Rng