commit | 4b3345a233ffc9a3b759c0ecd7b32560ef924570 | [log] [tgz] |
---|---|---|
author | Alex Crichton <alex@alexcrichton.com> | Sat Dec 19 10:10:55 2015 -0800 |
committer | Alex Crichton <alex@alexcrichton.com> | Sat Dec 19 10:10:55 2015 -0800 |
tree | 04509c0b4daf63bebec3447977cd7a6d6bec3504 | |
parent | 52fbc32fd66024737b21e2305e865edc72c7c129 [diff] | |
parent | cbe9929c2d5a75a3ae9766bd38b520d95b3c3d77 [diff] |
Merge pull request #88 from bluss/syntax-ext Fix rand_macros for syntax/syntax_ext crate split
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>())