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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+A [separate changelog is kept for rand_core](rand_core/CHANGELOG.md).
+
+You may also find the [Upgrade Guide](https://rust-random.github.io/book/update.html) useful.
+
+## [0.8.5] - 2021-08-20
+### Fixes
+- Fix build on non-32/64-bit architectures (#1144)
+- Fix "min_const_gen" feature for `no_std` (#1173)
+- Check `libc::pthread_atfork` return value with panic on error (#1178)
+- More robust reseeding in case `ReseedingRng` is used from a fork handler (#1178)
+- Fix nightly: remove unused `slice_partition_at_index` feature (#1215)
+- Fix nightly + `simd_support`: update `packed_simd` (#1216)
+
+### Rngs
+- `StdRng`: Switch from HC128 to ChaCha12 on emscripten (#1142).
+ We now use ChaCha12 on all platforms.
+
+### Documentation
+- Added docs about rand's use of const generics (#1150)
+- Better random chars example (#1157)
+
+
+## [0.8.4] - 2021-06-15
+### Additions
+- Use const-generics to support arrays of all sizes (#1104)
+- Implement `Clone` and `Copy` for `Alphanumeric` (#1126)
+- Add `Distribution::map` to derive a distribution using a closure (#1129)
+- Add `Slice` distribution (#1107)
+- Add `DistString` trait with impls for `Standard` and `Alphanumeric` (#1133)
+
+### Other
+- Reorder asserts in `Uniform` float distributions for easier debugging of non-finite arguments
+ (#1094, #1108)
+- Add range overflow check in `Uniform` float distributions (#1108)
+- Deprecate `rngs::adapter::ReadRng` (#1130)
+
+## [0.8.3] - 2021-01-25
+### Fixes
+- Fix `no-std` + `alloc` build by gating `choose_multiple_weighted` on `std` (#1088)
+
+## [0.8.2] - 2021-01-12
+### Fixes
+- Fix panic in `UniformInt::sample_single_inclusive` and `Rng::gen_range` when
+ providing a full integer range (eg `0..=MAX`) (#1087)
+
+## [0.8.1] - 2020-12-31
+### Other
+- Enable all stable features in the playground (#1081)
+
+## [0.8.0] - 2020-12-18
+### Platform support
+- The minimum supported Rust version is now 1.36 (#1011)
+- `getrandom` updated to v0.2 (#1041)
+- Remove `wasm-bindgen` and `stdweb` feature flags. For details of WASM support,
+ see the [getrandom documentation](https://docs.rs/getrandom/latest). (#948)
+- `ReadRng::next_u32` and `next_u64` now use little-Endian conversion instead
+ of native-Endian, affecting results on Big-Endian platforms (#1061)
+- The `nightly` feature no longer implies the `simd_support` feature (#1048)
+- Fix `simd_support` feature to work on current nightlies (#1056)
+
+### Rngs
+- `ThreadRng` is no longer `Copy` to enable safe usage within thread-local destructors (#1035)
+- `gen_range(a, b)` was replaced with `gen_range(a..b)`. `gen_range(a..=b)` is
+ also supported. Note that `a` and `b` can no longer be references or SIMD types. (#744, #1003)
+- Replace `AsByteSliceMut` with `Fill` and add support for `[bool], [char], [f32], [f64]` (#940)
+- Restrict `rand::rngs::adapter` to `std` (#1027; see also #928)
+- `StdRng`: add new `std_rng` feature flag (enabled by default, but might need
+ to be used if disabling default crate features) (#948)
+- `StdRng`: Switch from ChaCha20 to ChaCha12 for better performance (#1028)
+- `SmallRng`: Replace PCG algorithm with xoshiro{128,256}++ (#1038)
+
+### Sequences
+- Add `IteratorRandom::choose_stable` as an alternative to `choose` which does
+ not depend on size hints (#1057)
+- Improve accuracy and performance of `IteratorRandom::choose` (#1059)
+- Implement `IntoIterator` for `IndexVec`, replacing the `into_iter` method (#1007)
+- Add value stability tests for `seq` module (#933)
+
+### Misc
+- Support `PartialEq` and `Eq` for `StdRng`, `SmallRng` and `StepRng` (#979)
+- Added a `serde1` feature and added Serialize/Deserialize to `UniformInt` and `WeightedIndex` (#974)
+- Drop some unsafe code (#962, #963, #1011)
+- Reduce packaged crate size (#983)
+- Migrate to GitHub Actions from Travis+AppVeyor (#1073)
+
+### Distributions
+- `Alphanumeric` samples bytes instead of chars (#935)
+- `Uniform` now supports `char`, enabling `rng.gen_range('A'..='Z')` (#1068)
+- Add `UniformSampler::sample_single_inclusive` (#1003)
+
+#### Weighted sampling
+- Implement weighted sampling without replacement (#976, #1013)
+- `rand::distributions::alias_method::WeightedIndex` was moved to `rand_distr::WeightedAliasIndex`.
+ The simpler alternative `rand::distribution::WeightedIndex` remains. (#945)
+- Improve treatment of rounding errors in `WeightedIndex::update_weights` (#956)
+- `WeightedIndex`: return error on NaN instead of panic (#1005)
+
+### Documentation
+- Document types supported by `random` (#994)
+- Document notes on password generation (#995)
+- Note that `SmallRng` may not be the best choice for performance and in some
+ other cases (#1038)
+- Use `doc(cfg)` to annotate feature-gated items (#1019)
+- Adjust README (#1065)
+
+## [0.7.3] - 2020-01-10
+### Fixes
+- The `Bernoulli` distribution constructors now reports an error on NaN and on
+ `denominator == 0`. (#925)
+- Use `std::sync::Once` to register fork handler, avoiding possible atomicity violation (#928)
+- Fix documentation on the precision of generated floating-point values
+
+### Changes
+- Unix: make libc dependency optional; only use fork protection with std feature (#928)
+
+### Additions
+- Implement `std::error::Error` for `BernoulliError` (#919)
+
+## [0.7.2] - 2019-09-16
+### Fixes
+- Fix dependency on `rand_core` 0.5.1 (#890)
+
+### Additions
+- Unit tests for value stability of distributions added (#888)
+
+## [0.7.1] - 2019-09-13
+### Yanked
+This release was yanked since it depends on `rand_core::OsRng` added in 0.5.1
+but specifies a dependency on version 0.5.0 (#890), causing a broken builds
+when updating from `rand 0.7.0` without also updating `rand_core`.
+
+### Fixes
+- Fix `no_std` behaviour, appropriately enable c2-chacha's `std` feature (#844)
+- `alloc` feature in `no_std` is available since Rust 1.36 (#856)
+- Fix or squelch issues from Clippy lints (#840)
+
+### Additions
+- Add a `no_std` target to CI to continuously evaluate `no_std` status (#844)
+- `WeightedIndex`: allow adjusting a sub-set of weights (#866)
+
+## [0.7.0] - 2019-06-28
+
+### Fixes
+- Fix incorrect pointer usages revealed by Miri testing (#780, #781)
+- Fix (tiny!) bias in `Uniform` for 8- and 16-bit ints (#809)
+
+### Crate
+- Bumped MSRV (min supported Rust version) to 1.32.0
+- Updated to Rust Edition 2018 (#823, #824)
+- Removed dependence on `rand_xorshift`, `rand_isaac`, `rand_jitter` crates (#759, #765)
+- Remove dependency on `winapi` (#724)
+- Removed all `build.rs` files (#824)
+- Removed code already deprecated in version 0.6 (#757)
+- Removed the serde1 feature (It's still available for backwards compatibility, but it does not do anything. #830)
+- Many documentation changes
+
+### rand_core
+- Updated to `rand_core` 0.5.0
+- `Error` type redesigned with new API (#800)
+- Move `from_entropy` method to `SeedableRng` and remove `FromEntropy` (#800)
+- `SeedableRng::from_rng` is now expected to be value-stable (#815)
+
+### Standard RNGs
+- OS interface moved from `rand_os` to new `getrandom` crate (#765, [getrandom](https://github.com/rust-random/getrandom))
+- Use ChaCha for `StdRng` and `ThreadRng` (#792)
+- Feature-gate `SmallRng` (#792)
+- `ThreadRng` now supports `Copy` (#758)
+- Deprecated `EntropyRng` (#765)
+- Enable fork protection of ReseedingRng without `std` (#724)
+
+### Distributions
+- Many distributions have been moved to `rand_distr` (#761)
+- `Bernoulli::new` constructor now returns a `Result` (#803)
+- `Distribution::sample_iter` adjusted for more flexibility (#758)
+- Added `distributions::weighted::alias_method::WeightedIndex` for `O(1)` sampling (#692)
+- Support sampling `NonZeroU*` types with the `Standard` distribution (#728)
+- Optimised `Binomial` distribution sampling (#735, #740, #752)
+- Optimised SIMD float sampling (#739)
+
+### Sequences
+- Make results portable across 32- and 64-bit by using `u32` samples for `usize` where possible (#809)
+
+## [0.6.5] - 2019-01-28
+### Crates
+- Update `rand_core` to 0.4 (#703)
+- Move `JitterRng` to its own crate (#685)
+- Add a wasm-bindgen test crate (#696)
+
+### Platforms
+- Fuchsia: Replaced fuchsia-zircon with fuchsia-cprng
+
+### Doc
+- Use RFC 1946 for doc links (#691)
+- Fix some doc links and notes (#711)
+
+## [0.6.4] - 2019-01-08
+### Fixes
+- Move wasm-bindgen shims to correct crate (#686)
+- Make `wasm32-unknown-unknown` compile but fail at run-time if missing bindingsg (#686)
+
+## [0.6.3] - 2019-01-04
+### Fixes
+- Make the `std` feature require the optional `rand_os` dependency (#675)
+- Re-export the optional WASM dependencies of `rand_os` from `rand` to avoid breakage (#674)
+
+## [0.6.2] - 2019-01-04
+### Additions
+- Add `Default` for `ThreadRng` (#657)
+- Move `rngs::OsRng` to `rand_os` sub-crate; clean up code; use as dependency (#643) ##BLOCKER##
+- Add `rand_xoshiro` sub-crate, plus benchmarks (#642, #668)
+
+### Fixes
+- Fix bias in `UniformInt::sample_single` (#662)
+- Use `autocfg` instead of `rustc_version` for rustc version detection (#664)
+- Disable `i128` and `u128` if the `target_os` is `emscripten` (#671: work-around Emscripten limitation)
+- CI fixes (#660, #671)
+
+### Optimisations
+- Optimise memory usage of `UnitCircle` and `UnitSphereSurface` distributions (no PR)
+
+## [0.6.1] - 2018-11-22
+- Support sampling `Duration` also for `no_std` (only since Rust 1.25) (#649)
+- Disable default features of `libc` (#647)
+
+## [0.6.0] - 2018-11-14
+
+### Project organisation
+- Rand has moved from [rust-lang-nursery](https://github.com/rust-lang-nursery/rand)
+ to [rust-random](https://github.com/rust-random/rand)! (#578)
+- Created [The Rust Random Book](https://rust-random.github.io/book/)
+ ([source](https://github.com/rust-random/book))
+- Update copyright and licence notices (#591, #611)
+- Migrate policy documentation from the wiki (#544)
+
+### Platforms
+- Add fork protection on Unix (#466)
+- Added support for wasm-bindgen. (#541, #559, #562, #600)
+- Enable `OsRng` for powerpc64, sparc and sparc64 (#609)
+- Use `syscall` from `libc` on Linux instead of redefining it (#629)
+
+### RNGs
+- Switch `SmallRng` to use PCG (#623)
+- Implement `Pcg32` and `Pcg64Mcg` generators (#632)
+- Move ISAAC RNGs to a dedicated crate (#551)
+- Move Xorshift RNG to its own crate (#557)
+- Move ChaCha and HC128 RNGs to dedicated crates (#607, #636)
+- Remove usage of `Rc` from `ThreadRng` (#615)
+
+### Sampling and distributions
+- Implement `Rng.gen_ratio()` and `Bernoulli::new_ratio()` (#491)
+- Make `Uniform` strictly respect `f32` / `f64` high/low bounds (#477)
+- Allow `gen_range` and `Uniform` to work on non-`Copy` types (#506)
+- `Uniform` supports inclusive ranges: `Uniform::from(a..=b)`. This is
+ automatically enabled for Rust >= 1.27. (#566)
+- Implement `TrustedLen` and `FusedIterator` for `DistIter` (#620)
+
+#### New distributions
+- Add the `Dirichlet` distribution (#485)
+- Added sampling from the unit sphere and circle. (#567)
+- Implement the triangular distribution (#575)
+- Implement the Weibull distribution (#576)
+- Implement the Beta distribution (#574)
+
+#### Optimisations
+
+- Optimise `Bernoulli::new` (#500)
+- Optimise `char` sampling (#519)
+- Optimise sampling of `std::time::Duration` (#583)
+
+### Sequences
+- Redesign the `seq` module (#483, #515)
+- Add `WeightedIndex` and `choose_weighted` (#518, #547)
+- Optimised and changed return type of the `sample_indices` function. (#479)
+- Use `Iterator::size_hint()` to speed up `IteratorRandom::choose` (#593)
+
+### SIMD
+- Support for generating SIMD types (#523, #542, #561, #630)
+
+### Other
+- Revise CI scripts (#632, #635)
+- Remove functionality already deprecated in 0.5 (#499)
+- Support for `i128` and `u128` is automatically enabled for Rust >= 1.26. This
+ renders the `i128_support` feature obsolete. It still exists for backwards
+ compatibility but does not have any effect. This breaks programs using Rand
+ with `i128_support` on nightlies older than Rust 1.26. (#571)
+
+
+## [0.5.5] - 2018-08-07
+### Documentation
+- Fix links in documentation (#582)
+
+
+## [0.5.4] - 2018-07-11
+### Platform support
+- Make `OsRng` work via WASM/stdweb for WebWorkers
+
+
+## [0.5.3] - 2018-06-26
+### Platform support
+- OpenBSD, Bitrig: fix compilation (broken in 0.5.1) (#530)
+
+
+## [0.5.2] - 2018-06-18
+### Platform support
+- Hide `OsRng` and `JitterRng` on unsupported platforms (#512; fixes #503).
+
+
+## [0.5.1] - 2018-06-08
+
+### New distributions
+- Added Cauchy distribution. (#474, #486)
+- Added Pareto distribution. (#495)
+
+### Platform support and `OsRng`
+- Remove blanket Unix implementation. (#484)
+- Remove Wasm unimplemented stub. (#484)
+- Dragonfly BSD: read from `/dev/random`. (#484)
+- Bitrig: use `getentropy` like OpenBSD. (#484)
+- Solaris: (untested) use `getrandom` if available, otherwise `/dev/random`. (#484)
+- Emscripten, `stdweb`: split the read up in chunks. (#484)
+- Emscripten, Haiku: don't do an extra blocking read from `/dev/random`. (#484)
+- Linux, NetBSD, Solaris: read in blocking mode on first use in `fill_bytes`. (#484)
+- Fuchsia, CloudABI: fix compilation (broken in Rand 0.5). (#484)
+
+
+## [0.5.0] - 2018-05-21
+
+### Crate features and organisation
+- Minimum Rust version update: 1.22.0. (#239)
+- Create a separate `rand_core` crate. (#288)
+- Deprecate `rand_derive`. (#256)
+- Add `prelude` (and module reorganisation). (#435)
+- Add `log` feature. Logging is now available in `JitterRng`, `OsRng`, `EntropyRng` and `ReseedingRng`. (#246)
+- Add `serde1` feature for some PRNGs. (#189)
+- `stdweb` feature for `OsRng` support on WASM via stdweb. (#272, #336)
+
+### `Rng` trait
+- Split `Rng` in `RngCore` and `Rng` extension trait.
+ `next_u32`, `next_u64` and `fill_bytes` are now part of `RngCore`. (#265)
+- Add `Rng::sample`. (#256)
+- Deprecate `Rng::gen_weighted_bool`. (#308)
+- Add `Rng::gen_bool`. (#308)
+- Remove `Rng::next_f32` and `Rng::next_f64`. (#273)
+- Add optimized `Rng::fill` and `Rng::try_fill` methods. (#247)
+- Deprecate `Rng::gen_iter`. (#286)
+- Deprecate `Rng::gen_ascii_chars`. (#279)
+
+### `rand_core` crate
+- `rand` now depends on new `rand_core` crate (#288)
+- `RngCore` and `SeedableRng` are now part of `rand_core`. (#288)
+- Add modules to help implementing RNGs `impl` and `le`. (#209, #228)
+- Add `Error` and `ErrorKind`. (#225)
+- Add `CryptoRng` marker trait. (#273)
+- Add `BlockRngCore` trait. (#281)
+- Add `BlockRng` and `BlockRng64` wrappers to help implementations. (#281, #325)
+- Revise the `SeedableRng` trait. (#233)
+- Remove default implementations for `RngCore::next_u64` and `RngCore::fill_bytes`. (#288)
+- Add `RngCore::try_fill_bytes`. (#225)
+
+### Other traits and types
+- Add `FromEntropy` trait. (#233, #375)
+- Add `SmallRng` wrapper. (#296)
+- Rewrite `ReseedingRng` to only work with `BlockRngCore` (substantial performance improvement). (#281)
+- Deprecate `weak_rng`. Use `SmallRng` instead. (#296)
+- Deprecate `AsciiGenerator`. (#279)
+
+### Random number generators
+- Switch `StdRng` and `thread_rng` to HC-128. (#277)
+- `StdRng` must now be created with `from_entropy` instead of `new`
+- Change `thread_rng` reseeding threshold to 32 MiB. (#277)
+- PRNGs no longer implement `Copy`. (#209)
+- `Debug` implementations no longer show internals. (#209)
+- Implement `Clone` for `ReseedingRng`, `JitterRng`, OsRng`. (#383, #384)
+- Implement serialization for `XorShiftRng`, `IsaacRng` and `Isaac64Rng` under the `serde1` feature. (#189)
+- Implement `BlockRngCore` for `ChaChaCore` and `Hc128Core`. (#281)
+- All PRNGs are now portable across big- and little-endian architectures. (#209)
+- `Isaac64Rng::next_u32` no longer throws away half the results. (#209)
+- Add `IsaacRng::new_from_u64` and `Isaac64Rng::new_from_u64`. (#209)
+- Add the HC-128 CSPRNG `Hc128Rng`. (#210)
+- Change ChaCha20 to have 64-bit counter and 64-bit stream. (#349)
+- Changes to `JitterRng` to get its size down from 2112 to 24 bytes. (#251)
+- Various performance improvements to all PRNGs.
+
+### Platform support and `OsRng`
+- Add support for CloudABI. (#224)
+- Remove support for NaCl. (#225)
+- WASM support for `OsRng` via stdweb, behind the `stdweb` feature. (#272, #336)
+- Use `getrandom` on more platforms for Linux, and on Android. (#338)
+- Use the `SecRandomCopyBytes` interface on macOS. (#322)
+- On systems that do not have a syscall interface, only keep a single file descriptor open for `OsRng`. (#239)
+- On Unix, first try a single read from `/dev/random`, then `/dev/urandom`. (#338)
+- Better error handling and reporting in `OsRng` (using new error type). (#225)
+- `OsRng` now uses non-blocking when available. (#225)
+- Add `EntropyRng`, which provides `OsRng`, but has `JitterRng` as a fallback. (#235)
+
+### Distributions
+- New `Distribution` trait. (#256)
+- Add `Distribution::sample_iter` and `Rng::::sample_iter`. (#361)
+- Deprecate `Rand`, `Sample` and `IndependentSample` traits. (#256)
+- Add a `Standard` distribution (replaces most `Rand` implementations). (#256)
+- Add `Binomial` and `Poisson` distributions. (#96)
+- Add `Bernoulli` dsitribution. (#411)
+- Add `Alphanumeric` distribution. (#279)
+- Remove `Closed01` distribution, add `OpenClosed01`. (#274, #420)
+- Rework `Range` type, making it possible to implement it for user types. (#274)
+- Rename `Range` to `Uniform`. (#395)
+- Add `Uniform::new_inclusive` for inclusive ranges. (#274)
+- Use widening multiply method for much faster integer range reduction. (#274)
+- `Standard` distribution for `char` uses `Uniform` internally. (#274)
+- `Standard` distribution for `bool` uses sign test. (#274)
+- Implement `Standard` distribution for `Wrapping<T>`. (#436)
+- Implement `Uniform` distribution for `Duration`. (#427)
+
+
+## [0.4.3] - 2018-08-16
+### Fixed
+- Use correct syscall number for PowerPC (#589)
+
+
+## [0.4.2] - 2018-01-06
+### Changed
+- Use `winapi` on Windows
+- Update for Fuchsia OS
+- Remove dev-dependency on `log`
+
+
+## [0.4.1] - 2017-12-17
+### Added
+- `no_std` support
+
+
+## [0.4.0-pre.0] - 2017-12-11
+### Added
+- `JitterRng` added as a high-quality alternative entropy source using the
+ system timer
+- new `seq` module with `sample_iter`, `sample_slice`, etc.
+- WASM support via dummy implementations (fail at run-time)
+- Additional benchmarks, covering generators and new seq code
+
+### Changed
+- `thread_rng` uses `JitterRng` if seeding from system time fails
+ (slower but more secure than previous method)
+
+### Deprecated
+ - `sample` function deprecated (replaced by `sample_iter`)
+
+
+## [0.3.20] - 2018-01-06
+### Changed
+- Remove dev-dependency on `log`
+- Update `fuchsia-zircon` dependency to 0.3.2
+
+
+## [0.3.19] - 2017-12-27
+### Changed
+- Require `log <= 0.3.8` for dev builds
+- Update `fuchsia-zircon` dependency to 0.3
+- Fix broken links in docs (to unblock compiler docs testing CI)
+
+
+## [0.3.18] - 2017-11-06
+### Changed
+- `thread_rng` is seeded from the system time if `OsRng` fails
+- `weak_rng` now uses `thread_rng` internally
+
+
+## [0.3.17] - 2017-10-07
+### Changed
+ - Fuchsia: Magenta was renamed Zircon
+
+## [0.3.16] - 2017-07-27
+### Added
+- Implement Debug for mote non-public types
+- implement `Rand` for (i|u)i128
+- Support for Fuchsia
+
+### Changed
+- Add inline attribute to SampleRange::construct_range.
+ This improves the benchmark for sample in 11% and for shuffle in 16%.
+- Use `RtlGenRandom` instead of `CryptGenRandom`
+
+
+## [0.3.15] - 2016-11-26
+### Added
+- Add `Rng` trait method `choose_mut`
+- Redox support
+
+### Changed
+- Use `arc4rand` for `OsRng` on FreeBSD.
+- Use `arc4random(3)` for `OsRng` on OpenBSD.
+
+### Fixed
+- Fix filling buffers 4 GiB or larger with `OsRng::fill_bytes` on Windows
+
+
+## [0.3.14] - 2016-02-13
+### Fixed
+- Inline definitions from winapi/advapi32, which decreases build times
+
+
+## [0.3.13] - 2016-01-09
+### Fixed
+- Compatible with Rust 1.7.0-nightly (needed some extra type annotations)
+
+
+## [0.3.12] - 2015-11-09
+### Changed
+- Replaced the methods in `next_f32` and `next_f64` with the technique described
+ Saito & Matsumoto at MCQMC'08. The new method should exhibit a slightly more
+ uniform distribution.
+- Depend on libc 0.2
+
+### Fixed
+- Fix iterator protocol issue in `rand::sample`
+
+
+## [0.3.11] - 2015-08-31
+### Added
+- Implement `Rand` for arrays with n <= 32
+
+
+## [0.3.10] - 2015-08-17
+### Added
+- Support for NaCl platforms
+
+### Changed
+- Allow `Rng` to be `?Sized`, impl for `&mut R` and `Box<R>` where `R: ?Sized + Rng`
+
+
+## [0.3.9] - 2015-06-18
+### Changed
+- Use `winapi` for Windows API things
+
+### Fixed
+- Fixed test on stable/nightly
+- Fix `getrandom` syscall number for aarch64-unknown-linux-gnu
+
+
+## [0.3.8] - 2015-04-23
+### Changed
+- `log` is a dev dependency
+
+### Fixed
+- Fix race condition of atomics in `is_getrandom_available`
+
+
+## [0.3.7] - 2015-04-03
+### Fixed
+- Derive Copy/Clone changes
+
+
+## [0.3.6] - 2015-04-02
+### Changed
+- Move to stable Rust!
+
+
+## [0.3.5] - 2015-04-01
+### Fixed
+- Compatible with Rust master
+
+
+## [0.3.4] - 2015-03-31
+### Added
+- Implement Clone for `Weighted`
+
+### Fixed
+- Compatible with Rust master
+
+
+## [0.3.3] - 2015-03-26
+### Fixed
+- Fix compile on Windows
+
+
+## [0.3.2] - 2015-03-26
+
+
+## [0.3.1] - 2015-03-26
+### Fixed
+- Fix compile on Windows
+
+
+## [0.3.0] - 2015-03-25
+### Changed
+- Update to use log version 0.3.x
+
+
+## [0.2.1] - 2015-03-22
+### Fixed
+- Compatible with Rust master
+- Fixed iOS compilation
+
+
+## [0.2.0] - 2015-03-06
+### Fixed
+- Compatible with Rust master (move from `old_io` to `std::io`)
+
+
+## [0.1.4] - 2015-03-04
+### Fixed
+- Compatible with Rust master (use wrapping ops)
+
+
+## [0.1.3] - 2015-02-20
+### Fixed
+- Compatible with Rust master
+
+### Removed
+- Removed Copy implementations from RNGs
+
+
+## [0.1.2] - 2015-02-03
+### Added
+- Imported functionality from `std::rand`, including:
+ - `StdRng`, `SeedableRng`, `TreadRng`, `weak_rng()`
+ - `ReaderRng`: A wrapper around any Reader to treat it as an RNG.
+- Imported documentation from `std::rand`
+- Imported tests from `std::rand`
+
+
+## [0.1.1] - 2015-02-03
+### Added
+- Migrate to a cargo-compatible directory structure.
+
+### Fixed
+- Do not use entropy during `gen_weighted_bool(1)`
+
+
+## [Rust 0.12.0] - 2014-10-09
+### Added
+- Impl Rand for tuples of arity 11 and 12
+- Include ChaCha pseudorandom generator
+- Add `next_f64` and `next_f32` to Rng
+- Implement Clone for PRNGs
+
+### Changed
+- Rename `TaskRng` to `ThreadRng` and `task_rng` to `thread_rng` (since a
+ runtime is removed from Rust).
+
+### Fixed
+- Improved performance of ISAAC and ISAAC64 by 30% and 12 % respectively, by
+ informing the optimiser that indexing is never out-of-bounds.
+
+### Removed
+- Removed the Deprecated `choose_option`
+
+
+## [Rust 0.11.0] - 2014-07-02
+### Added
+- document when to use `OSRng` in cryptographic context, and explain why we use `/dev/urandom` instead of `/dev/random`
+- `Rng::gen_iter()` which will return an infinite stream of random values
+- `Rng::gen_ascii_chars()` which will return an infinite stream of random ascii characters
+
+### Changed
+- Now only depends on libcore!
+- Remove `Rng.choose()`, rename `Rng.choose_option()` to `.choose()`
+- Rename OSRng to OsRng
+- The WeightedChoice structure is no longer built with a `Vec<Weighted<T>>`,
+ but rather a `&mut [Weighted<T>]`. This means that the WeightedChoice
+ structure now has a lifetime associated with it.
+- The `sample` method on `Rng` has been moved to a top-level function in the
+ `rand` module due to its dependence on `Vec`.
+
+### Removed
+- `Rng::gen_vec()` was removed. Previous behavior can be regained with
+ `rng.gen_iter().take(n).collect()`
+- `Rng::gen_ascii_str()` was removed. Previous behavior can be regained with
+ `rng.gen_ascii_chars().take(n).collect()`
+- {IsaacRng, Isaac64Rng, XorShiftRng}::new() have all been removed. These all
+ relied on being able to use an OSRng for seeding, but this is no longer
+ available in librand (where these types are defined). To retain the same
+ functionality, these types now implement the `Rand` trait so they can be
+ generated with a random seed from another random number generator. This allows
+ the stdlib to use an OSRng to create seeded instances of these RNGs.
+- Rand implementations for `Box<T>` and `@T` were removed. These seemed to be
+ pretty rare in the codebase, and it allows for librand to not depend on
+ liballoc. Additionally, other pointer types like Rc<T> and Arc<T> were not
+ supported.
+- Remove a slew of old deprecated functions
+
+
+## [Rust 0.10] - 2014-04-03
+### Changed
+- replace `Rng.shuffle's` functionality with `.shuffle_mut`
+- bubble up IO errors when creating an OSRng
+
+### Fixed
+- Use `fill()` instead of `read()`
+- Rewrite OsRng in Rust for windows
+
+## [0.10-pre] - 2014-03-02
+### Added
+- Separate `rand` out of the standard library