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 Lustre_types
|
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 _ | Expr_ident _ ->
|
25
|
true
|
26
|
| Expr_tuple el | Expr_array el ->
|
27
|
List.for_all check_expr el
|
28
|
| Expr_access (e1, _) | Expr_power (e1, _) ->
|
29
|
check_expr e1
|
30
|
| Expr_ite (c, t, e) ->
|
31
|
check_expr c && check_expr t && check_expr e
|
32
|
| Expr_arrow _ | Expr_fby _ | Expr_pre _ ->
|
33
|
false
|
34
|
| Expr_when (e', _, _) ->
|
35
|
check_expr e'
|
36
|
| Expr_merge (_, hl) ->
|
37
|
List.for_all (fun (_, h) -> check_expr h) hl
|
38
|
| Expr_appl (i, e', i') ->
|
39
|
let reset_opt = match i' with None -> true | Some e'' -> check_expr e'' in
|
40
|
let stateless_node =
|
41
|
Basic_library.is_stateless_fun i
|
42
|
||
|
43
|
try check_node (node_from_name i)
|
44
|
with Not_found ->
|
45
|
let loc = expr.expr_loc in
|
46
|
Error.pp_error loc (fun fmt ->
|
47
|
Format.fprintf fmt "Unable to find node %s in expression %a" i
|
48
|
Printers.pp_expr expr);
|
49
|
raise (Error.Error (loc, Error.Unbound_symbol i))
|
50
|
in
|
51
|
(* Warning message when trying to reset a stateless node *)
|
52
|
if stateless_node && not reset_opt then
|
53
|
Error.pp_warning expr.expr_loc (fun fmt ->
|
54
|
Format.fprintf fmt "Trying to reset call the stateless node or op %s"
|
55
|
i);
|
56
|
check_expr e' && reset_opt && stateless_node
|
57
|
|
58
|
and compute_node nd =
|
59
|
(* returns true iff the node is stateless.*)
|
60
|
let eqs, aut = get_node_eqs nd in
|
61
|
aut = []
|
62
|
&& (* A node containinig an automaton will be stateful *)
|
63
|
List.for_all (fun eq -> check_expr eq.eq_rhs) eqs
|
64
|
|
65
|
and check_node td =
|
66
|
match td.top_decl_desc with
|
67
|
| Node nd -> (
|
68
|
match nd.node_stateless with
|
69
|
| None ->
|
70
|
let stateless = compute_node nd in
|
71
|
nd.node_stateless <- Some stateless;
|
72
|
if nd.node_dec_stateless && not stateless then
|
73
|
raise (Error (td.top_decl_loc, Stateful_kwd nd.node_id))
|
74
|
else (
|
75
|
nd.node_dec_stateless <- stateless;
|
76
|
stateless)
|
77
|
| Some stl ->
|
78
|
stl)
|
79
|
| ImportedNode nd ->
|
80
|
if nd.nodei_prototype = Some "C" && not nd.nodei_stateless then
|
81
|
raise (Error (td.top_decl_loc, Stateful_ext_C nd.nodei_id));
|
82
|
nd.nodei_stateless
|
83
|
| _ ->
|
84
|
true
|
85
|
|
86
|
let check_prog decls = List.iter (fun td -> ignore (check_node td)) decls
|
87
|
|
88
|
let force_prog decls =
|
89
|
let force_node td =
|
90
|
match td.top_decl_desc with
|
91
|
| Node nd ->
|
92
|
nd.node_dec_stateless <- false;
|
93
|
nd.node_stateless <- Some false
|
94
|
| _ ->
|
95
|
()
|
96
|
in
|
97
|
List.iter (fun td -> ignore (force_node td)) decls
|
98
|
|
99
|
let check_compat_decl decl =
|
100
|
match decl.top_decl_desc with
|
101
|
| ImportedNode nd -> (
|
102
|
(* A node declared in the header (lusi) shall be locally defined with
|
103
|
compatible stateless flag *)
|
104
|
let td = Corelang.node_from_name nd.nodei_id in
|
105
|
match td.top_decl_desc with
|
106
|
| Node nd' ->
|
107
|
let stateless = check_node td in
|
108
|
if nd.nodei_stateless && not stateless then
|
109
|
raise (Error (td.top_decl_loc, Stateful_imp nd.nodei_id))
|
110
|
else nd'.node_dec_stateless <- nd.nodei_stateless
|
111
|
| _ ->
|
112
|
assert false)
|
113
|
| Node nd -> (
|
114
|
match nd.node_spec with
|
115
|
| Some (Contract _) ->
|
116
|
(* A contract element in a header does not need to be provided in the
|
117
|
associed lus file *)
|
118
|
()
|
119
|
| _ ->
|
120
|
assert false)
|
121
|
| _ ->
|
122
|
()
|
123
|
|
124
|
let check_compat header = List.iter check_compat_decl header
|
125
|
|
126
|
let pp_error fmt err =
|
127
|
match err with
|
128
|
| Stateful_kwd nd ->
|
129
|
Format.fprintf fmt "node %s should be stateless but is actually stateful.@."
|
130
|
nd
|
131
|
| Stateful_imp nd ->
|
132
|
Format.fprintf fmt
|
133
|
"node %s is declared stateless but is actually stateful.@." nd
|
134
|
| Stateful_ext_C nd ->
|
135
|
Format.fprintf fmt
|
136
|
"node %s with declared prototype C cannot be stateful, it has to be a \
|
137
|
function.@."
|
138
|
nd
|
139
|
|
140
|
(* Local Variables: *)
|
141
|
(* compile-command:"make -C .." *)
|
142
|
(* End: *)
|