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Polysemy is a high-performance, zero-boilerplate effect system for Haskell, designed to simplify the handling of side effects in functional programs. Unlike traditional monad transformer stacks, Polysemy uses a modern approach based on freer monads and interpreters, allowing developers to define, compose, and interpret effects in a more modular and testable way. It aims to offer both flexibility and performance without sacrificing type safety or expressiveness.
Features
- Defines effects as pure Haskell data types
- Enables modular, composable effect handlers
- Avoids monad transformer boilerplate
- Supports runtime and compile-time interpreters
- Promotes testability by mocking effects
- Designed for high performance and clarity
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BSD LicenseFollow Polysemy
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