Size-based termination of higher-order rewriting

02/19/2018

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by   Frédéric Blanqui, et al.

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We provide a general and modular criterion for the termination of simply-typed λ -calculus extended with function symbols defined by user-defined rewrite rules. Following a work of Hughes, Pareto and Sabry for functions defined with a fixpoint operator and pattern-matching, several criteria use typing rules for bounding the height of arguments in function calls. In this paper, we extend this approach to rewriting-based function definitions and more general user-defined notions of size.