FParsec is a parser combinator library for F#.

With FParsec you can implement recursive‐descent text parsers for formal grammars.

FParsec’s features include:

• support for context‐sensitive, infinite look‐ahead grammars,
• automatically generated, highly readable error messages,
• Unicode support,
• efficient support for very large files,
• an embeddable, runtime‐configurable operator‐precedence parser component,
• a simple, efficient and easily extensible API,
• an implementation thoroughly optimized for performance,
• comprehensive documentation,
• a permissive open source license.

• FParsec vs alternatives
• NuGet packages and building FParsec from source
• Tutorial
• User's guide
• Parser quick reference
• Reference

• Code: 2-clause BSD license ("Simplified BSD License")
• Data: FParsec includes some data derived from the Unicode Character Database which is distributed under the Unicode, Inc. License Agreement.
• Documentation: Creative Commons Attribution‐NonCommercial 3.0 Unported License

See the www.quanttec.com/fparsec/license.html for more details.