commit | 75fa9f3bff0dc8e028f301b9adf8837769af8ec0 | [log] [tgz] |
---|---|---|
author | Erick Tryzelaar <etryzelaar@google.com> | Thu Jan 24 15:30:24 2019 -0800 |
committer | Erick Tryzelaar <etryzelaar@google.com> | Fri Jan 25 08:37:29 2019 -0800 |
tree | 5323322e7b0009dd02dba237876ed9e2ee644b9d | |
parent | 84dffa9999dcc58eb6e3145ecd9e3f9e3a2c4e92 [diff] |
Remove unnecessary import of fuchsia-zircon The fuchsia project is trying to purge users of fuchsia-zircon and instead replace them with the much slimmer fuchsia-cprng, which only exposes the CPRNG for the OS. There are still a few users of 0.3.x, like multipart and rust-crypto. Since rand 0.3 is just re-exporting 0.4, there is no reason to explicitly depend on fuchsia-zircon, so this just removes this dependency.
A Rust library for random number generators and other randomness functionality.
Version 0.3 has been replaced by a compatibility wrapper around rand
0.4. It is recommended to update to 0.4.
Add this to your Cargo.toml
:
[dependencies] rand = "0.4"
and this to your crate root:
extern crate rand;
There is built-in support for a random number generator (RNG) associated with each thread stored in thread-local storage. This RNG can be accessed via thread_rng, or used implicitly via random. This RNG is normally randomly seeded from an operating-system source of randomness, e.g. /dev/urandom on Unix systems, and will automatically reseed itself from this source after generating 32 KiB of random data.
let tuple = rand::random::<(f64, char)>(); println!("{:?}", tuple)
use rand::Rng; let mut rng = rand::thread_rng(); if rng.gen() { // random bool println!("i32: {}, u32: {}", rng.gen::<i32>(), rng.gen::<u32>()) }
It is also possible to use other RNG types, which have a similar interface. The following uses the “ChaCha” algorithm instead of the default.
use rand::{Rng, ChaChaRng}; let mut rng = rand::ChaChaRng::new_unseeded(); println!("i32: {}, u32: {}", rng.gen::<i32>(), rng.gen::<u32>())
derive(Rand)
You can derive the Rand
trait for your custom type via the #[derive(Rand)]
directive. To use this first add this to your Cargo.toml:
rand = "0.4" rand_derive = "0.3"
Next in your crate:
extern crate rand; #[macro_use] extern crate rand_derive; #[derive(Rand, Debug)] struct MyStruct { a: i32, b: u32, } fn main() { println!("{:?}", rand::random::<MyStruct>()); }
rand
is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE, and LICENSE-MIT for details.