CRSX-Combinatory Reduction Systems with Extensions

Abstract

Combinatory Reduction Systems with Extensions (CRSX) is a system available from http:// crsx.sourceforge.net and characterized by the following properties: Higher-order rewriting engine based on pure Combinatory Reduction Systems with full strong reduction (but no specified reduction strategy). Rule and term syntax based on λ-calculus and term rewriting conventions including Unicode support. Strict checking and declaration requirements to avoid idiosyncratic errors in rewrite rules. Interpreter is implemented in Java 5 and usable stand-alone as well as from an Eclipse plugin (under development). Includes a custom parser generator (front-end to JavaCC parser generator) designed to ease parsing directly into higher-order abstract syntax (as well as permitting the use of custom syntax in rules files). Experimental (and evolving) sort system to help rule management. Compiler from (well-sorted deterministic subset of) CRSX to stand-alone C code. © Kristoffer H. Rose.