A Formalization and Correctness Proof of the CGOL Language System

Abstract

In many important ways the design and implementation of programming languages are hindered rather than helped by BNF. We present an alternative meta-language based on the work of Pratt which retains much of the effective power of BNF but is more convenient for designer, implementer, and user alike. Its amenability to formal treatment is demonstrated by a rigorous correctness proof of a simple implementation.