Struct proptest::option::Probability

pub struct Probability(_);

A probability in the range [0.0, 1.0] with a default of 0.5.

Methods

impl Probability

pub fn new(prob: f64) -> Self

Creates a Probability from a f64.

Panics

Panics if the probability is outside interval [0.0, 1.0].

pub fn with<X>(self, and: X) -> (Self, X)

Merges self together with some other argument producing a product type expected by some impelementations of A: Arbitrary in A::Parameters. This can be more ergonomic to work with and may help type inference.

pub fn lift<X: Default>(self) -> (Self, X)

Merges self together with some other argument generated with a default value producing a product type expected by some impelementations of A: Arbitrary in A::Parameters. This can be more ergonomic to work with and may help type inference.

Trait Implementations

impl Arbitrary for Probability

type Parameters = ()

The type of parameters that [arbitrary_with] accepts for configuration of the generated [Strategy]. Parameters must implement [Default].

type Strategy = MapInto<RangeInclusive<f64>, Self>

The type of [Strategy] used to generate values of type Self.

fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy

Generates a [Strategy] for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a [Strategy] for producing arbitrary values of type the implementing type (Self).

impl Clone for Probability

fn clone(&self) -> Probability

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Probability

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

Formats the value using the given formatter.

impl PartialEq<Probability> for Probability

fn eq(&self, other: &Probability) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Probability) -> bool

This method tests for !=.

impl From<f64> for Probability

fn from(prob: f64) -> Self

Creates a Probability from a f64.

Panics

Panics if the probability is outside interval [0.0, 1.0].

impl From<Probability> for f64

fn from(p: Probability) -> Self

Performs the conversion.

impl Copy for Probability

impl Default for Probability

fn default() -> Self

The default probability is 0.5, or 50% chance.