core library

Classes

Err<T, E>: Failed operation result.
None<T>: Option state for an absent value.
Ok<T, E>: Successful operation result.
Option<T>: Optional value wrapper for Rust-style present-or-absent values.
Result<T, E>: Result of an operation that can either succeed with T or fail with E.
Some<T>: Option state for a present value.
Unit: Empty success value for operations that only signal completion.

OptionCombine on Option<T>: Combining Option values, and moving between Option and Result.
OptionFlatten on Option<Option<T>>: Removing one level of Option nesting.
OptionQuery on Option<T>: Reading an Option without matching on it.
OptionTransform on Option<T>: Transforming and choosing between Option values.
OptionTranspose on Option<Result<T, E>>: Swapping an Option of a Result inside out.
OptionUnwrap on Option<T>: Extraction with a fallback on Option.
OptionUnzip on Option<(A, B)>: Splitting an Option of a pair.
ResultChain on Result<T, E>: Chaining and extraction on Result.
ResultCollect on Iterable<Result<T, E>>: Gathering many Result values into one.
ResultFlatten on Result<Result<T, E>, E>: Removing one level of Result nesting.
ResultQuery on Result<T, E>: Asking a Result what it holds, and taking the value out.
ResultTransform on Result<T, E>: Transforming and choosing between Result values.
ResultTranspose on Result<Option<T>, E>: Swapping a Result of an Option inside out.