[][src]Struct rand::rngs::adapter::ReadRng

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

An RNG that reads random bytes straight from any type supporting std::io::Read, for example files.

This will work best with an infinite reader, but that is not required.

This can be used with /dev/urandom on Unix but it is recommended to use OsRng instead.


ReadRng uses std::io::Read::read_exact, which retries on interrupts. All other errors from the underlying reader, including when it does not have enough data, will only be reported through try_fill_bytes. The other RngCore methods will panic in case of an error.


use rand::Rng;
use rand::rngs::adapter::ReadRng;

let data = vec![1, 2, 3, 4, 5, 6, 7, 8];
let mut rng = ReadRng::new(&data[..]);
println!("{:x}", rng.gen::<u32>());


impl<R: Read> ReadRng<R>[src]

pub fn new(r: R) -> ReadRng<R>[src]

Create a new ReadRng from a Read.

Trait Implementations

impl<R: Debug> Debug for ReadRng<R>[src]

impl<R: Read> RngCore for ReadRng<R>[src]

Auto Trait Implementations

impl<R> Unpin for ReadRng<R> where
    R: Unpin

impl<R> Sync for ReadRng<R> where
    R: Sync

impl<R> Send for ReadRng<R> where
    R: Send

impl<R> UnwindSafe for ReadRng<R> where
    R: UnwindSafe

impl<R> RefUnwindSafe for ReadRng<R> where
    R: RefUnwindSafe

Blanket Implementations

impl<R> Rng for R where
    R: RngCore + ?Sized

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

impl<T> From<T> for T[src]

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

type Error = Infallible

The type returned in the event of a conversion error.

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

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

The type returned in the event of a conversion error.

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

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

impl<T> FromCast<T> for T

impl<T, U> Cast<U> for T where
    U: FromCast<T>, 

impl<T> FromBits<T> for T

impl<T, U> IntoBits<U> for T where
    U: FromBits<T>, 

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,