N.B. this crate requires nightly, as it makes use of FnBox and untagged unions.

thunk: Generic lazy evaluation for Rust

The thunk crate provides primitives for lazy evaluation in Rust.

At present, it provides three thunk types and a trait which encapsulates lazily evaluated types, Lazy. The thunk types are as follows:

• Thunk: non-Send, non-Sync thunks.
• AtomicThunk: Send + Sync thunks which use atomic data internally. This is slower than Thunk, but AtomicThunk is thread-safe.
• Strict: Send + Sync, paradoxically strict thunks. Strict doesn't actually defer anything, and is provided to make it simpler to write code which is generic over strictness.

License

Licensed under either of

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

at your option.

Contribution

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 above, without any additional terms or conditions.