[−][src]Struct quickcheck::Gen
Gen represents a PRNG.
It is the source of randomness from which QuickCheck will generate
values. An instance of Gen is passed to every invocation of
Arbitrary::arbitrary, which permits callers to use lower level RNG
routines to generate values.
It is unspecified whether this is a secure RNG or not. Therefore, callers should assume it is insecure.
Implementations
impl Gen[src]
pub fn new(size: usize) -> Gen[src]
Returns a Gen with the given size configuration.
The size parameter controls the size of random values generated.
For example, it specifies the maximum length of a randomly generated
vector, but is and should not be used to control the range of a
randomly generated number. (Unless that number is used to control the
size of a data structure.)
pub fn size(&self) -> usize[src]
Returns the size configured with this generator.
pub fn choose<'a, T>(&mut self, slice: &'a [T]) -> Option<&'a T>[src]
Choose among the possible alternatives in the slice given. If the slice
is empty, then None is returned. Otherwise, a non-None value is
guaranteed to be returned.
Auto Trait Implementations
impl RefUnwindSafe for Gen[src]
impl Send for Gen[src]
impl Sync for Gen[src]
impl Unpin for Gen[src]
impl UnwindSafe for Gen[src]
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,