Lambda the Ultimate

Modern Eiffel is a new language which is syntactically based on Eiffel but has a lot of concepts of functional languages like Haskell, OCaml or Coq. Modern Eiffel puts the emphasis on static verification, i.e. a compiler can statically check that a programm written in Modern Eiffel meets its specification.

The following article describes how Modern Eiffel's proof engine can be used to reason with inductive types.