Definition co_default (s: struct_or_union): composite.

(* Specifications: *)
Lemma co_default_consistent: forall su, composite_consistent cenv_cs (co_default su).
Lemma get_co_consistent: forall id, composite_consistent cenv_cs (get_co id).
Lemma get_co_members_nil_sizeof_0: forall id, co_members (get_co id) = nil -> co_sizeof (get_co id) = 0%Z.
Lemma get_co_members_no_replicate: forall id, members_no_replicate (co_members (get_co id)) = true.
Lemma sizeof_Tstruct: forall id a, sizeof (Tstruct id a) = co_sizeof (get_co id).
Lemma sizeof_Tunion: forall id a, sizeof (Tunion id a) = co_sizeof (get_co id).