commit | 35cd0db91336f1bae1967001f5f58864fe3b4ba8 | [log] [tgz] |
---|---|---|
author | Aaron Gallagher <_@habnab.it> | Fri Jul 29 09:01:22 2016 +0000 |
committer | Aaron Gallagher <_@habnab.it> | Fri Jul 29 09:01:22 2016 +0000 |
tree | 5cd8bef08329baa968cc1ce18207a99cdeae4e20 | |
parent | f24537072f9d51cca153d9979181793015b81623 [diff] |
Reduce duplication in std::sys::unix::rand. There were a bunch of more-of-less the same few lines for doing a fill_bytes+transmute, and I didn't want to copy-paste it yet again.
A Rust library for random number generators and other randomness functionality.
Add this to your Cargo.toml
:
[dependencies] rand = "0.3"
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>())