Megaparsec

An industrial-strength, highly flexible monadic parser combinator library for Haskell that delivers exceptional error reporting.

Megaparsec is a feature-rich Haskell library designed to build robust parsers by combining small, composable functions. It strikes a precise balance between raw speed, flexibility, and the quality of its parse errors (generating highly detailed, customizable error messages out of the box). Developed as a modern, more reliable alternative to the classic Parsec library, Megaparsec supports custom token streams, state tracking, and sophisticated recovery mechanisms. This makes it a go-to choice for production-grade tasks: from parsing custom domain-specific languages and configuration files to handling complex programming language syntaxes.

https://github.com/mrkkrp/megaparsec