louthy/language-ext

Health v2 · maintenance only

Flags: prerelease_only

Adoption not part of the score

7084 stars · 450 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A C# library that provides a pure functional programming framework, using and abusing C# language features to make code more declarative and robust. It offers monads, monad transformers, immutable collections, higher-kinded types, parser combinators, and functional effects for building maintainable codebases.

Use cases

• write functional-style C# code with monads like Option and Either
• use immutable collections and persistent data structures in .NET
• build parser combinators in C# like Haskell's Parsec
• handle errors functionally instead of exceptions
• manage concurrency and shared state atomically
• use higher-kinded types and ad-hoc polymorphism in C#

When to choose

• you want declarative, pure functional code in C#
• you need robust error handling without exceptions
• you want immutable data structures and structural equality
• you're building large C# codebases where reducing cognitive load matters

When to avoid

• your team is unfamiliar with functional programming concepts
• you need minimal dependencies or tiny binary size
• you're working in a codebase heavily tied to imperative idioms

Facets

library · maturity active

parser serialization concurrency error-handling programming-languages developer-tools dotnet cross-platform functional-programming monads immutable-collections higher-kinded-types parser-combinators csharp algorithms

Member repositories

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