Parsing expression grammars (PEG)

Parsing Expression Grammars (PEGs) are a formal way to define how to recognize and interpret the structure of text or data. Think of PEGs as a set of rules that describe valid patterns in a language, similar to a grammar in natural language but for computer languages. They enable precise and efficient parsing by trying patterns in a specific order, deciding whether a piece of text matches the rules without ambiguity. This makes PEGs useful for creating compilers, interpreters, and data processors that need to understand complex syntax reliably.