|
1
|
(********************************************************************)
|
|
2
|
(* *)
|
|
3
|
(* The LustreC compiler toolset / The LustreC Development Team *)
|
|
4
|
(* Copyright 2012 - -- ONERA - CNRS - INPT *)
|
|
5
|
(* *)
|
|
6
|
(* LustreC is free software, distributed WITHOUT ANY WARRANTY *)
|
|
7
|
(* under the terms of the GNU Lesser General Public License *)
|
|
8
|
(* version 2.1. *)
|
|
9
|
(* *)
|
|
10
|
(********************************************************************)
|
|
11
|
|
|
12
|
open LustreSpec
|
|
13
|
open Corelang
|
|
14
|
|
|
15
|
type error =
|
|
16
|
| Stateful_kwd of ident
|
|
17
|
| Stateful_imp of ident
|
|
18
|
| Stateful_ext_C of ident
|
|
19
|
|
|
20
|
exception Error of Location.t * error
|
|
21
|
|
|
22
|
let rec check_expr expr =
|
|
23
|
match expr.expr_desc with
|
|
24
|
| Expr_const _
|
|
25
|
| Expr_ident _ -> true
|
|
26
|
| Expr_tuple el
|
|
27
|
| Expr_array el -> List.for_all check_expr el
|
|
28
|
| Expr_access (e1, _)
|
|
29
|
| Expr_power (e1, _) -> check_expr e1
|
|
30
|
| Expr_ite (c, t, e) -> check_expr c && check_expr t && check_expr e
|
|
31
|
| Expr_arrow _
|
|
32
|
| Expr_fby _
|
|
33
|
| Expr_pre _ -> false
|
|
34
|
| Expr_when (e', i, l)-> check_expr e'
|
|
35
|
| Expr_merge (i, hl) -> List.for_all (fun (t, h) -> check_expr h) hl
|
|
36
|
| Expr_appl (i, e', i') ->
|
|
37
|
check_expr e' &&
|
|
38
|
(Basic_library.is_stateless_fun i || check_node (node_from_name i))
|
|
39
|
and compute_node nd =
|
|
40
|
List.for_all (fun eq -> check_expr eq.eq_rhs) (get_node_eqs nd)
|
|
41
|
and check_node td =
|
|
42
|
match td.top_decl_desc with
|
|
43
|
| Node nd -> (
|
|
44
|
match nd.node_stateless with
|
|
45
|
| None ->
|
|
46
|
begin
|
|
47
|
let stateless = compute_node nd in
|
|
48
|
nd.node_stateless <- Some stateless;
|
|
49
|
if nd.node_dec_stateless && (not stateless)
|
|
50
|
then raise (Error (td.top_decl_loc, Stateful_kwd nd.node_id))
|
|
51
|
else (nd.node_dec_stateless <- stateless; stateless)
|
|
52
|
end
|
|
53
|
| Some stl -> stl)
|
|
54
|
| ImportedNode nd ->
|
|
55
|
begin
|
|
56
|
(if nd.nodei_prototype = Some "C" && not nd.nodei_stateless
|
|
57
|
then raise (Error (td.top_decl_loc, Stateful_ext_C nd.nodei_id)));
|
|
58
|
nd.nodei_stateless
|
|
59
|
end
|
|
60
|
| _ -> true
|
|
61
|
|
|
62
|
let check_prog decls =
|
|
63
|
List.iter (fun td -> ignore (check_node td)) decls
|
|
64
|
|
|
65
|
|
|
66
|
let force_prog decls =
|
|
67
|
let force_node td =
|
|
68
|
match td.top_decl_desc with
|
|
69
|
| Node nd -> (
|
|
70
|
nd.node_dec_stateless <- false;
|
|
71
|
nd.node_stateless <- Some false)
|
|
72
|
| _ -> ()
|
|
73
|
in
|
|
74
|
List.iter (fun td -> ignore (force_node td)) decls
|
|
75
|
|
|
76
|
let check_compat_decl decl =
|
|
77
|
match decl.top_decl_desc with
|
|
78
|
| ImportedNode nd ->
|
|
79
|
let td = Corelang.node_from_name nd.nodei_id in
|
|
80
|
(match td.top_decl_desc with
|
|
81
|
| Node nd' -> let stateless = check_node td in
|
|
82
|
if nd.nodei_stateless && (not stateless)
|
|
83
|
then raise (Error (td.top_decl_loc, Stateful_imp nd.nodei_id))
|
|
84
|
else nd'.node_dec_stateless <- nd.nodei_stateless
|
|
85
|
| _ -> assert false)
|
|
86
|
| Node _ -> assert false
|
|
87
|
| _ -> ()
|
|
88
|
|
|
89
|
let check_compat header =
|
|
90
|
List.iter check_compat_decl header
|
|
91
|
|
|
92
|
let pp_error fmt err =
|
|
93
|
match err with
|
|
94
|
| Stateful_kwd nd ->
|
|
95
|
Format.fprintf fmt
|
|
96
|
"node %s should be stateless but is actually stateful.@."
|
|
97
|
nd
|
|
98
|
| Stateful_imp nd ->
|
|
99
|
Format.fprintf fmt
|
|
100
|
"node %s is declared stateless but is actually stateful.@."
|
|
101
|
nd
|
|
102
|
| Stateful_ext_C nd ->
|
|
103
|
Format.fprintf fmt
|
|
104
|
"node %s with declared prototype C cannot be stateful, it has to be a function.@."
|
|
105
|
nd
|
|
106
|
|
|
107
|
(* Local Variables: *)
|
|
108
|
(* compile-command:"make -C .." *)
|
|
109
|
(* End: *)
|