Super combinators

This document introduces SuperCombinators, a parser combinator framework for Swift that aims to provide a declarative and memory-safe API. It discusses existing parser combinator solutions that had downsides like custom operators or memory leaks. The framework takes an approach of defining parsers as strings that are transformed into closures. It distinguishes between patterns that traverse strings and parsers that extract values, allowing for useful extensions and simplification of composition operators. Recursive parsers are handled by lazily generating parsing functions with unowned references to avoid reference cycles. An example demonstrates parsing integers and sums recursively in a declarative manner.