# Isabelle Hacks This project contains small Isabelle "hacks" that provide additional functionality to [Isabelle](https://isabelle.in.tum.de) or showcase specific functionality. The individual hacks usually consist out of a single theory file and all documentation is contained in that theory file. The master branch should work with the latest official release of Isabelle (Isabelle 2021-1, at time of writing), hacks for older versions might be available on a dedicated branch. ## List of Isabelle Hacks * [Assert.thy](Assert.thy) provides a new top level command **assert** that provides a simple way for specifying assertions that Isabelle checks while processing a theory. * [Code_Reflection.thy](Code_Reflection.thy) provides a new top-level command for reflecting generated SML code into Isabelle's ML environment. * [Fxp.thy](Fxp.thy) provides Isabelle support for The Functional XML Parser (fxp). * [Hiding_Type_Variables.thy](Hiding_Type_Variables.thy) provides print a setup for defining default type variables of type constructors. The default type variables can be hidden in output, e.g., `('a, 'b, 'c) foo` is shown as `(_) foo`. This shorthand notation can also be used in input (using a parse translation), which (sometimes) helps to focus on the important parts of complex type declarations. * [Ml_Yacc_Lib.thy](Ml_Yacc_Lib.thy) provides Isabelle support for parser generated by ml-yacc (part of sml/NJ). * [Nano_JSON.thy](Nano_JSON.thy) provides support for a JSON-like data exchange for Isabelle/HOL. * [Simple_Oracle.thy](Simple_Oracle.thy) provides an example on integrating an external tool as simple oracle or counter example generator, similar to the built-in quickcheck. ## Authors Main author: [Achim D. Brucker](http://www.brucker.ch/) ## License If not otherwise stated, all hacks are licensed under a 2-clause BSD-style license. ## Authors Main author: [Achim D. Brucker](http://www.brucker.ch/) ## License If not otherwise stated, all hacks are licensed under a 2-clause BSD-style license. SPDX-License-Identifier: BSD-2-Clause ## Upstream Repository The upstream git repository, i.e., the single source of truth, for this project is hosted by the [Software Assurance & Security Research Team](https://logicalhacking.com) at .