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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture by the instructor presents the Spec# programming system, focusing on a verifying compiler for sequential C# 2.0. It covers method contracts, invariants, and type annotations, using weakest preconditions for verification. The lecture demonstrates the power of non-null types, moving runtime errors to compile time, and introducing new language changes for reference types. It also discusses comparing against null, non-null instance fields, and solutions for handling non-null issues. Additionally, it explores the limitations of pre- and postconditions, re-entrance with callbacks, and the concept of allowing certain invariants to be broken. The lecture concludes with a discussion on exposing invariants through special block statements.