Core types and helpers

The expression package exports the core types used by most applications.

API	Use it for
Option, Some, Nothing	A value that may be absent.
Result, Ok, Error	An expected success or failure with a reason.
Try, Success, Failure	A Result whose error is an exception.
pipe, compose	Readable value transformations and reusable workflows.
tagged_union, tag, case	Domain alternatives and pattern matching.
curry, curry_flip	Partial application when integrating with curried APIs.
tailrec, tailrec_async	Stack-safe recursive algorithms.

Use the detailed module pages for all members: Option, Result, Try, Pipe, Compose, Curry, Tagged unions, and Miscellaneous helpers.