Instance CompSpecs : compspecs. make_compspecs prog. Defined.
Definition Vprog : varspecs. mk_varspecs prog. Defined.
Local Open Scope logic.
Definition t_struct_b := Tstruct _b noattr.
Definition get_spec :=
DECLARE _get
WITH v : reptype' t_struct_b, gv: globals
PRE  []
PROP ()
LOCAL(gvars gv)
SEP(data_at Ews t_struct_b (repinj _ v) (gv _p))
POST [ tint ]
PROP()
LOCAL (temp 1%positive (Vint (snd (snd v))))
SEP (data_at Ews t_struct_b (repinj _ v) (gv _p)).
Definition get_spec' :=
DECLARE _get
WITH v : (int * (float * int))%type, gv: globals
PRE  []
PROP ()
LOCAL(gvars gv)
SEP(data_at Ews t_struct_b (repinj t_struct_b v) (gv _p))
POST [ tint ]
PROP()
LOCAL (temp 1%positive (Vint (snd (snd v))))
SEP (data_at Ews t_struct_b (repinj t_struct_b v) (gv _p)).
Definition update22 (i: int) (v: reptype' t_struct_b) : reptype' t_struct_b :=
(fst v, (fst (snd v), i)).
Definition set_spec :=
DECLARE _set
WITH i : int, v : reptype' t_struct_b, gv: globals
PRE  [ _i OF tint ]
PROP  ()
LOCAL (gvars gv;
temp _i (Vint i))
SEP   (data_at Ews t_struct_b (repinj _ v) (gv _p))
POST [ tvoid ]
PROP() LOCAL()
SEP(data_at Ews t_struct_b (repinj _ (update22 i v)) (gv _p)).
Definition Gprog : funspecs :=   ltac:(with_library prog [get_spec; set_spec]).

Lemma body_get:  semax_body Vprog Gprog f_get get_spec.