Haskellinspired

Haskellinspired is a descriptive term used in programming to denote approaches, languages, or libraries that draw substantial inspiration from Haskell. It is not a formal language or product, but a category that highlights a shared emphasis on functional programming, strong typing, and abstraction. Commonly associated features include purity, referential transparency, and expressive type systems.

Core characteristics include a strong static type system often featuring type inference and type classes; emphasis on pure functions and immutability; algebraic data types and pattern matching; higher-order functions and currying; and a design that favors composability through abstractions such as functors, applicatives, and monads. Evaluation is often lazy, or laziness is a design option.

In practice, Haskellinspired design appears in languages and libraries that adopt these abstractions to improve safety and modularity. Examples include languages with Haskell-like type classes or type systems (PureScript and Idris) and libraries in languages such as Scala, Rust, or JavaScript that imitate monadic error handling and functional structures.

The term is flexible and sometimes ambiguous; some use it to mean just a few ideas such as immutability, while others apply it to full blown type-class driven programming. When used, it is often accompanied by a feature list or a mapping to Haskell's core concepts to clarify scope.