GitLab

Typing of expressions is done. However, there are still some admits in the proofs, to be fixed in the following days.

Rework evaluation semantics to not be arguing about precondition, make this explicit in the theorem, that we assume it. Admitted proofs that are obvious

Rework Coq proofs, to get rid of specifying precondition validity for execution by adding this as a property of the semantics

Start working on supporting let statements. Therefore add environment simulation relation and prove preservation by small step semantics for it

for precondition checker, write composiing checker function and compose
soundness proofs into one theorem