Pure patterns type systems

  • Authors:
  • Gilles Barthe;Horatiu Cirstea;Claude Kirchner;Luigi Liquori

  • Affiliations:
  • LORIA, INRIA & University Nancy II, Cedex France;LORIA, INRIA & University Nancy II, Cedex France;LORIA, INRIA & University Nancy II, Cedex France;LORIA, INRIA & University Nancy II, Cedex France

  • Venue:
  • POPL '03 Proceedings of the 30th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
  • Year:
  • 2003

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Abstract

We introduce a new framework of algebraic pure type systems in which we consider rewrite rules as lambda terms with patterns and rewrite rule application as abstraction application with built-in matching facilities. This framework, that we call "Pure Pattern Type Systems", is particularly well-suited for the foundations of programming (meta)languages and proof assistants since it provides in a fully unified setting higher-order capabilities and pattern matching ability together with powerful type systems. We prove some standard properties like confluence and subject reduction for the case of a syntactic theory and under a syntactical restriction over the shape of patterns. We also conjecture the strong normalization of typable terms. This work should be seen as a contribution to a formal connection between logics and rewriting, and a step towards new proof engines based on the Curry-Howard isomorphism.