Camlp4 (original) (raw)

Camlp4 is a software system for writing extensible parsers for programming languages. It provides a set of OCaml libraries that are used to define grammars as well as loadable syntax extensions of such grammars. Camlp4 stands for Caml Preprocessor and Pretty-Printer and one of its most important applications was the definition of domain-specific extensions of the syntax of OCaml. Version 4.08, released in the summer of 2019, was the last official version of this library. It is currently deprecated; instead, it is recommended to use the PPX (PreProcessor eXtensions) libraries.