pub struct StepRng { /* private fields */ }
Expand description
A mock generator yielding very predictable output
This generates an arithmetic sequence (i.e. adds a constant each step)
over a u64
number, using wrapping arithmetic. If the increment is 0
the generator yields a constant.
Other integer types (64-bit and smaller) are produced via cast from u64
.
Other types are produced via their implementation of Rng
or
Distribution
.
Output values may not be intuitive and may change in future releases but
are considered
portable.
(bool
output is true when bit 1u64 << 31
is set.)
§Example
use rand::Rng;
use rand::rngs::mock::StepRng;
let mut my_rng = StepRng::new(2, 1);
let sample: [u64; 3] = my_rng.random();
assert_eq!(sample, [2, 3, 4]);
Implementations§
Trait Implementations§
impl Eq for StepRng
impl StructuralPartialEq for StepRng
Auto Trait Implementations§
impl Freeze for StepRng
impl RefUnwindSafe for StepRng
impl Send for StepRng
impl Sync for StepRng
impl Unpin for StepRng
impl UnwindSafe for StepRng
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<R> Rng for R
impl<R> Rng for R
Source§fn random<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
fn random<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
StandardUniform
distribution. Read moreSource§fn random_iter<T>(self) -> Iter<StandardUniform, Self, T> ⓘ
fn random_iter<T>(self) -> Iter<StandardUniform, Self, T> ⓘ
Source§fn random_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
fn random_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
Source§fn random_bool(&mut self, p: f64) -> bool
fn random_bool(&mut self, p: f64) -> bool
p
of being true. Read moreSource§fn random_ratio(&mut self, numerator: u32, denominator: u32) -> bool
fn random_ratio(&mut self, numerator: u32, denominator: u32) -> bool
numerator/denominator
of being
true. Read moreSource§fn sample<T, D: Distribution<T>>(&mut self, distr: D) -> T
fn sample<T, D: Distribution<T>>(&mut self, distr: D) -> T
Source§fn sample_iter<T, D>(self, distr: D) -> Iter<D, Self, T> ⓘwhere
D: Distribution<T>,
Self: Sized,
fn sample_iter<T, D>(self, distr: D) -> Iter<D, Self, T> ⓘwhere
D: Distribution<T>,
Self: Sized,
Source§fn gen<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
fn gen<T>(&mut self) -> Twhere
StandardUniform: Distribution<T>,
random
to avoid conflict with the new gen
keyword in Rust 2024.Rng::random
.Source§fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
fn gen_range<T, R>(&mut self, range: R) -> Twhere
T: SampleUniform,
R: SampleRange<T>,
random_range
Rng::random_range
.Source§impl<R> TryRngCore for R
impl<R> TryRngCore for R
Source§type Error = Infallible
type Error = Infallible
Source§fn try_next_u32(&mut self) -> Result<u32, <R as TryRngCore>::Error>
fn try_next_u32(&mut self) -> Result<u32, <R as TryRngCore>::Error>
u32
.Source§fn try_next_u64(&mut self) -> Result<u64, <R as TryRngCore>::Error>
fn try_next_u64(&mut self) -> Result<u64, <R as TryRngCore>::Error>
u64
.Source§fn try_fill_bytes(
&mut self,
dst: &mut [u8],
) -> Result<(), <R as TryRngCore>::Error>
fn try_fill_bytes( &mut self, dst: &mut [u8], ) -> Result<(), <R as TryRngCore>::Error>
dest
entirely with random data.Source§fn unwrap_mut(&mut self) -> UnwrapMut<'_, Self>
fn unwrap_mut(&mut self) -> UnwrapMut<'_, Self>
UnwrapMut
wrapper.Source§fn read_adapter(&mut self) -> RngReadAdapter<'_, Self>where
Self: Sized,
fn read_adapter(&mut self) -> RngReadAdapter<'_, Self>where
Self: Sized,
RngCore
to a RngReadAdapter
.Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 16 bytes