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The purpose of this library is to provide a minimal list of currated crates which enhance the std library. In addition, most or all crates in this library should:

• Be usable to most or all users of the library.
• Provide key functionality.
• Be well-tested and reliable.
• Be well-documented.
• Have a clean, understandable interface.

If a new crate proves to fit those conditions better than an existing crate, it should be considered as a possible replacement.

As this library is a moving target, its version stability should not be relied upon. If you wish to have a specific set of versions, consider linking to a specific commit (TODO: there are no releases yet).

Justifications

• autocfg: Enhanced ability to configure a program at the pre-compilation stage.
• cfg-if: Enhanced ability to configure a program at compile-tile.
• either: Fills a niche between Option<T> and Result<T, E>.
• log: Widely-used logging crate API, with a large number of implementation libraries.
• num: A widely-used extension of Rusts' numerical type system.
• num_cpus: Provides the number of logical CPUs; useful to know for multi-threading.
• once_cell: Single-assignment cells, lazy values, and improved static variable assignment.
• parking_lot: More compact and efficient versions of the std synchronization primitives.
• rand: Widely-used, capable, and adaptable random value generation; not limited to numbers.
• scopeguard: Defer to the end of the scope.
• thread_local: Thread-local variables and storage; can be used more places than the std thread_local!()

Contributing

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as below, without any additional terms or conditions.

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.