rand::distributions::uniform

Struct UniformFloat

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pub struct UniformFloat<X> { /* private fields */ }
Expand description

The back-end implementing UniformSampler for floating-point types.

Unless you are implementing UniformSampler for your own type, this type should not be used directly, use Uniform instead.

§Implementation notes

Instead of generating a float in the [0, 1) range using Standard, the UniformFloat implementation converts the output of an PRNG itself. This way one or two steps can be optimized out.

The floats are first converted to a value in the [1, 2) interval using a transmute-based method, and then mapped to the expected range with a multiply and addition. Values produced this way have what equals 23 bits of random digits for an f32, and 52 for an f64.

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impl<X: Clone> Clone for UniformFloat<X>

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fn clone(&self) -> UniformFloat<X>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<X: Debug> Debug for UniformFloat<X>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<X: PartialEq> PartialEq for UniformFloat<X>

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fn eq(&self, other: &UniformFloat<X>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl UniformSampler for UniformFloat<f32>

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type X = f32

The type sampled by this implementation.
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fn new<B1, B2>(low_b: B1, high_b: B2) -> Self
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Construct self, with inclusive lower bound and exclusive upper bound [low, high). Read more
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fn new_inclusive<B1, B2>(low_b: B1, high_b: B2) -> Self
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Construct self, with inclusive bounds [low, high]. Read more
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fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Self::X

Sample a value.
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fn sample_single<R: Rng + ?Sized, B1, B2>( low_b: B1, high_b: B2, rng: &mut R, ) -> Self::X
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Sample a single value uniformly from a range with inclusive lower bound and exclusive upper bound [low, high). Read more
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fn sample_single_inclusive<R: Rng + ?Sized, B1, B2>( low: B1, high: B2, rng: &mut R, ) -> Self::X
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Sample a single value uniformly from a range with inclusive lower bound and inclusive upper bound [low, high]. Read more
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impl UniformSampler for UniformFloat<f64>

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type X = f64

The type sampled by this implementation.
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fn new<B1, B2>(low_b: B1, high_b: B2) -> Self
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Construct self, with inclusive lower bound and exclusive upper bound [low, high). Read more
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fn new_inclusive<B1, B2>(low_b: B1, high_b: B2) -> Self
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Construct self, with inclusive bounds [low, high]. Read more
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fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Self::X

Sample a value.
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fn sample_single<R: Rng + ?Sized, B1, B2>( low_b: B1, high_b: B2, rng: &mut R, ) -> Self::X
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Sample a single value uniformly from a range with inclusive lower bound and exclusive upper bound [low, high). Read more
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fn sample_single_inclusive<R: Rng + ?Sized, B1, B2>( low: B1, high: B2, rng: &mut R, ) -> Self::X
where B1: SampleBorrow<Self::X> + Sized, B2: SampleBorrow<Self::X> + Sized,

Sample a single value uniformly from a range with inclusive lower bound and inclusive upper bound [low, high]. Read more
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impl<X: Copy> Copy for UniformFloat<X>

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impl<X> StructuralPartialEq for UniformFloat<X>

Auto Trait Implementations§

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impl<X> Freeze for UniformFloat<X>
where X: Freeze,

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impl<X> RefUnwindSafe for UniformFloat<X>
where X: RefUnwindSafe,

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impl<X> Send for UniformFloat<X>
where X: Send,

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impl<X> Sync for UniformFloat<X>
where X: Sync,

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impl<X> Unpin for UniformFloat<X>
where X: Unpin,

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impl<X> UnwindSafe for UniformFloat<X>
where X: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.