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Pascal Wittmann

A Language for the Specification and Efficient Implementation of Type Systems

Type systems are important tools to detect semantic inconsistencies, to establish abstractions and to guide programmers in the development process. However, there is currently a lack of established tools supporting the development of type systems, tools like lexer and parser generators but for type systems. We introduce a declar- ative specification language for type systems that allows to specify type systems in a natural deductive style. We generate two products out of a type system specifica- tion: A first-order formula representation to facilitate the use of automated theorem provers and a type checker. The type checker generator uses results proven by auto- mated theorem provers to check the applicability of optimization strategies and the first-order formula representation is also a reference implementation. Both results aim to accelerate the development cycle for type systems and to narrow the gap between theory and practice.

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