LIPIcs.FSCD.2020.35.pdf
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The New Rewriting Engine of Dedukti (System Description)
Authors
Frédéric Blanqui 
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5th International Conference on Formal Structures for Computation and Deduction (FSCD 2020)
Series: Leibniz International Proceedings in Informatics (LIPIcs)
Conference: Formal Structures for Computation and Deduction (FSCD) - License:
Creative Commons Attribution 3.0 Unported license
- Publication Date: 2020-06-28
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Acknowledgements
The authors thank Bruno Barras and Rodolphe Lepigre for their help in developing the new rewriting engine of Dedukti.
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Gabriel Hondet and Frédéric Blanqui. The New Rewriting Engine of Dedukti (System Description). In 5th International Conference on Formal Structures for Computation and Deduction (FSCD 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 167, pp. 35:1-35:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)
https://doi.org/10.4230/LIPIcs.FSCD.2020.35
Abstract
Dedukti is a type-checker for the λΠ-calculus modulo rewriting, an extension of Edinburgh’s logical framework LF where functions and type symbols can be defined by rewrite rules. It therefore contains an engine for rewriting LF terms and types according to the rewrite rules given by the user. A key component of this engine is the matching algorithm to find which rules can be fired. In this paper, we describe the class of rewrite rules supported by Dedukti and the new implementation of the matching algorithm. Dedukti supports non-linear rewrite rules on terms with binders using higher-order pattern-matching as in Combinatory Reduction Systems (CRS). The new matching algorithm extends the technique of decision trees introduced by Luc Maranget in the OCaml compiler to this more general context.
Subject Classification
ACM Subject Classification
- Theory of computation → Equational logic and rewriting
- Theory of computation → Operational semantics
Keywords
- rewriting
- higher-order pattern-matching
- decision trees
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References
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