Crate features

It is recommended to check the crate's Cargo.toml or README.md for features. Since rand v0.9, rust-random crates only use explicit features (i.e. all features are listed under [features]).

Release versions of Cargo.toml can be viewed on docs.rs:

• https://docs.rs/crate/rand/latest/source/Cargo.toml.orig
• https://docs.rs/crate/rand_core/latest/source/Cargo.toml.orig
• https://docs.rs/crate/rand_distr/latest/source/Cargo.toml.orig
• https://docs.rs/crate/rand_chacha/latest/source/Cargo.toml.orig
• https://docs.rs/crate/rand_xoshiro/latest/source/Cargo.toml.orig
• https://docs.rs/crate/rand_pcg/latest/source/Cargo.toml.orig

Common features

The following features are common to rand_core, rand, rand_distr and potentially some RNG crates:

• std: opt into functionality dependent on the std lib. This is default-enabled except in rand_core; for no_std usage, use default-features = false.
• alloc: enables functionality requiring an allocator (for usage with no_std). This is implied by std.
• serde: enables serialization via serde, version 1.0.

rand_distr features

The floating point functions from num_traits and libm are used to support no_std environments and ensure reproducibility. If the floating point functions from std are preferred, which may provide better accuracy and performance but may produce different random values, the std_math feature can be enabled. (Note that any other crate depending on num-traits's std feature (default-enabled) will have the same effect.)