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 declarative 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 specification: 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 automated 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.
* Clone repository
* Install vampire and make sure it is in PATH
* Install Eclipse plugin Spoofax (https://www.metaborg.org/en/latest/source/install.html)
* Import project into Eclipse
* Build the project to make sure everything works
* Restart Eclipse
* Choose a type system from the folder syntax/specification/
* Comment all lines after `rules`
* Click on `Generation` -> `Generate SDF`
* Build the project again
* Uncomment the lines after `rules`
Now you are ready to select actions from the Typecheck and
Verification menus, add new typing rules and conjectures. Changes in
the sections meta-variables, contexts and judgments require the
regeneration of the sdf file and a rebuild of the project.
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