Monocle is a pure functional, optics library for Scala providing immutable data access and transformation tools — including Lens, Prism, Iso, Optional, and Traversal. It enables composable, declarative modifications of deeply nested immutable structures in a concise and type-safe fashion.
Features
- Core optics: Lens, Prism, Iso, Optional, Traversal
- Safe, immutable access/modification without boilerplate
- Composable optics chains using composeLens, composeTraversal
- Integration with Cats, Cats Effect, and typeclass-based workflows
- Support for Scala 2 and 3, and multiple data structures (case classes, ADTs)
- Compatible with Scala.js and Scala Native
Project Samples
Categories
LibrariesLicense
MIT LicenseFollow Monocle
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