Parser Combinator

Parser combinators are higher-order functions that take parsers as input and produce new parsers, facilitating the construction of sophisticated parsers through composition rather than manual implementation. They excel in functional languages like F#, Haskell, or Scala, where parsers are typically functions mapping input strings to results (success with parsed value and remaining input, or failure). Common combinators include sequencing (.>>. for "and then"), choice (<|> for "or"), repetition (many or many1), and optional matching, making grammars expressive and modular