(** Commutation between the translation of expressions and left contexts. *)

(* Specifications: *)
Lemma typeof_context:
forall k1 k2 C, leftcontext k1 k2 C ->
forall e1 e2, Csyntax.typeof e1 = Csyntax.typeof e2 ->
Csyntax.typeof (C e1) = Csyntax.typeof (C e2).