Struct quickcheck::StdGen

pub struct StdGen<R> { /* fields omitted */ }

StdGen is the default implementation of Gen.

Values of type StdGen can be created with the gen function in this crate.

Methods

impl<R: Rng> StdGen<R>

Returns a StdGen with the given configuration using any random number generator.

The size parameter controls the size of random values generated. For example, it specifies the maximum length of a randomly generated vector and also will specify the maximum magnitude of a randomly generated number.

pub fn new(rng: R, size: usize) -> StdGen<R>

Trait Implementations

impl<R: Rng> Rng for StdGen<R>

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn next_f32(&mut self) -> f32

Return the next random f32 selected from the half-open interval [0, 1).

fn next_f64(&mut self) -> f64

Return the next random f64 selected from the half-open interval [0, 1).

fn gen<T>(&mut self) -> T where     T: Rand,

Return a random value of a Rand type.

Important traits for Generator<'a, T, R>

impl<'a, T, R> Iterator for Generator<'a, T, R> where
    R: Rng,
    T: Rand,  type Item = T;

fn gen_iter<T>(&'a mut self) -> Generator<'a, T, Self> where     T: Rand,

Return an iterator that will yield an infinite number of randomly generated items.

fn gen_range<T>(&mut self, low: T, high: T) -> T where     T: SampleRange + PartialOrd<T>,

Generate a random value in the range [low, high).

fn gen_weighted_bool(&mut self, n: u32) -> bool

Return a bool with a 1 in n chance of true

Important traits for AsciiGenerator<'a, R>

impl<'a, R> Iterator for AsciiGenerator<'a, R> where
    R: Rng,  type Item = char;

fn gen_ascii_chars(&'a mut self) -> AsciiGenerator<'a, Self>

Return an iterator of random characters from the set A-Z,a-z,0-9.

fn choose<T>(&mut self, values: &'a [T]) -> Option<&'a T>

Return a random element from values.

fn choose_mut<T>(&mut self, values: &'a mut [T]) -> Option<&'a mut T>

Return a mutable pointer to a random element from values.

fn shuffle<T>(&mut self, values: &mut [T])

Shuffle a mutable slice in place.

impl<R: Rng> Gen for StdGen<R>

fn size(&self) -> usize