A double-ended queue implemented with a growable ring buffer.| doc.rust-lang.org
An `Ordering` is the result of a comparison between two values.| doc.rust-lang.org
Trait for types that form a total order.| doc.rust-lang.org
Trait for comparisons using the equality operator.| doc.rust-lang.org
`Result` is a type that represents either success (`Ok`) or failure (`Err`).| doc.rust-lang.org
The `Option` type. See the module level documentation for more.| doc.rust-lang.org