bors c15038db08 auto merge of #10223 : huonw/rust/gamma, r=cmr ...

Implements the [Gamma distribution](https://en.wikipedia.org/wiki/Gamma_distribution), using the algorithm described by Marsaglia & Tsang 2000[1]. I added tests checking that the mean and variance of this implementation is as expected for a range of values of the parameters in https://github.com/huonw/random-tests/commit/5d87c00a0fb69c8fa173593714cef76ddfddb651 (they pass locally, but obviously won't even build on Travis until this is merged).

Also, moves `std::rand::distributions` to a subfolder, and performs a minor clean-up of the benchmarking (makes the number of iterations shared by the whole `std::rand` subtree).

[1]: George Marsaglia and Wai Wan Tsang. 2000. "A Simple Method for Generating Gamma Variables" *ACM Trans. Math. Softw.* 26, 3 (September 2000), 363-372. DOI:[10.1145/358407.358414](http://doi.acm.org/10.1145/358407.358414).

2013-11-01 18:36:42 -07:00

..

distributions

std::rand: share the benchmark counter among the whole module tree.

2013-11-01 22:09:06 +11:00

isaac.rs

auto merge of #9810 : huonw/rust/rand3, r=alexcrichton

2013-10-23 08:31:21 -07:00

mod.rs

std::rand: share the benchmark counter among the whole module tree.

2013-11-01 22:09:06 +11:00

os.rs

std::rand: documentation & references.

2013-10-23 10:40:06 +11:00

rand_impls.rs

std::rand: Make Rng.next_u32 non-default, waiting for #7771.

2013-10-09 22:22:44 +11:00

reader.rs

Remove the extension traits for Readers/Writers

2013-10-28 10:16:45 -07:00

reseeding.rs

Fix infinite recursion in fill_bytes()

2013-10-31 21:19:47 -05:00