Struct maidsafe_utilities::SeededRng
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pub struct SeededRng(_);
A fast pseudorandom number generator for use in tests which allows seeding and prints the seed when the thread in which it is created panics.
Methods
impl SeededRng
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fn new() -> Self
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Construct a new SeededRng
using a seed generated from cryptographically secure random
data.
The seed is only set once for the whole process, so every call to this will yield internal RNGs which are all seeded identically.
fn from_seed(seed: [u32; 4]) -> Self
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Construct a new SeededRng
using seed
.
If the underlying static seed has already been initialised to a value different to seed
,
then this function will panic.
fn thread_rng() -> SeededRng
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Constructs a thread-local SeededRng
. The seed is generated via a global SeededRng
using
the global seed.
fn new_rng(&mut self) -> SeededRng
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Construct a new SeededRng
using a seed generated from random data provided by self
.
Trait Implementations
impl Default for SeededRng
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impl Display for SeededRng
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fn fmt(&self, formatter: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Debug for SeededRng
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fn fmt(&self, formatter: &mut Formatter) -> Result
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Formats the value using the given formatter.
impl Drop for SeededRng
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impl Rng for SeededRng
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fn next_u32(&mut self) -> u32
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Return the next random u32. Read more
fn choose<'a, T>(&mut self, arg: &'a [T]) -> Option<&'a T>
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Return a random element from values
. Read more
fn shuffle<T>(&mut self, values: &mut [T])
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Shuffle a mutable slice in place. Read more
fn next_u64(&mut self) -> u64
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Return the next random u64. Read more
fn next_f32(&mut self) -> f32
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Return the next random f32 selected from the half-open interval [0, 1)
. Read more
fn next_f64(&mut self) -> f64
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Return the next random f64 selected from the half-open interval [0, 1)
. Read more
fn fill_bytes(&mut self, dest: &mut [u8])
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Fill dest
with random data. Read more
fn gen<T>(&mut self) -> T where
T: Rand,
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T: Rand,
Return a random value of a Rand
type. Read more
fn gen_iter<T>(&'a mut self) -> Generator<'a, T, Self> where
T: Rand,
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T: Rand,
Return an iterator that will yield an infinite number of randomly generated items. Read more
fn gen_range<T>(&mut self, low: T, high: T) -> T where
T: SampleRange + PartialOrd<T>,
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T: SampleRange + PartialOrd<T>,
Generate a random value in the range [low
, high
). Read more
fn gen_weighted_bool(&mut self, n: u32) -> bool
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Return a bool with a 1 in n chance of true Read more
fn gen_ascii_chars(&'a mut self) -> AsciiGenerator<'a, Self>
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Return an iterator of random characters from the set A-Z,a-z,0-9. Read more
fn choose_mut<T>(&mut self, values: &'a mut [T]) -> Option<&'a mut T>
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Return a mutable pointer to a random element from values
. Read more