viewcvs.cgi/types/types.mli

type label = int
type atom  = int
type const = Integer of Big_int.big_int | Atom of atom | Char of Chars.Unichar.t

(** Algebra **)

type node
type descr

val make: unit -> node
val define: node -> descr -> unit

val cons: descr -> node
val internalize: node -> node

val id: node -> int
val descr: node -> descr

val equal_descr: descr -> descr -> bool
val hash_descr: descr -> int


module DescrHash: Hashtbl.S with type key = descr

(** Boolean connectives **)

val cup    : descr -> descr -> descr
val cap    : descr -> descr -> descr
val diff   : descr -> descr -> descr
val neg    : descr -> descr
val empty  : descr
val any    : descr

(** Constructors **)

val interval : Big_int.big_int -> Big_int.big_int -> descr
val atom     : atom Atoms.t -> descr
val times    : node -> node -> descr
val arrow    : node -> node -> descr
val record   : label -> bool -> node -> descr
val char     : Chars.t -> descr
val constant : const -> descr

(** Positive systems and least solutions **)

module Positive :
sig
  type v
  val forward: unit -> v
  val define: v -> v -> unit
  val ty: descr -> v
  val cup: v list -> v
  val times: v -> v -> v

  val solve: v -> node
end

(** Labels and atom names **)

val mk_atom  : string -> atom
val atom_name : atom -> string

val label : string -> label
val label_name : label -> string

(** Normalization **)

module Product : sig
  val any : descr
  val other : descr -> descr
  val is_product : descr -> bool

  (* List of non-empty rectangles *)
  type t = (descr * descr) list
  val is_empty: t -> bool
  val get: descr -> t
  val pi1: t -> descr
  val pi2: t -> descr
    
  (* Intersection with (pi1,Any) *)
  val restrict_1: t -> descr -> t

  (* List of non-empty rectangles whose first projection
     are pair-wise disjunct *)
  type normal = t
  val normal: descr -> normal

  val need_second: t -> bool
    (* Is there more than a single rectangle ? *)
end

module Record : sig
  val any : descr

  (* List of maps label -> (optional, content) *)
  type t = (label, (bool * descr)) SortedMap.t list
  val get: descr -> t
  val is_empty: t -> bool
  val restrict_label_present: t -> label -> t
  val restrict_field: t -> label -> descr -> t
  val restrict_label_absent: t -> label -> t
  val project_field: t -> label -> descr

  type normal = 
      [ `Success
      | `Fail
      | `Label of label * (descr * normal) list * normal ]
  val normal: descr -> normal

  val project : descr -> label -> descr
    (* Raise Not_found if label is not necessarily present *)
end

module Arrow : sig
  val any : descr

  val check_strenghten: descr -> descr -> descr
    (* [check_strenghten t s]
       Assume that [t] is an intersection of arrow types
       representing the interface of an abstraction;
       check that this abstraction has type [s] (otherwise raise Not_found)
       and returns a refined type for this abstraction.
    *)

  type t
  val is_empty: t -> bool
  val get: descr -> t
    (* Always succeed; no check <= Arrow.any *)

  val domain: t -> descr
  val apply: t -> descr -> descr
    (* Always succeed; no check on the domain *)

  val need_arg : t -> bool
    (* True if the type of the argument is needed to obtain
       the type of the result (must use [apply]; otherwise,
       [apply_noarg] is enough *)
  val apply_noarg : t -> descr
end


module Int : sig
  val any : descr

  val is_int : descr -> bool
  val get: descr -> Intervals.t
  val put: Intervals.t -> descr
end

module Atom : sig
  val has_atom : descr -> atom -> bool
end

val normalize : node -> node

(** Subtyping and sample values **)

val is_empty : descr -> bool
val non_empty: descr -> bool
val subtype  : descr -> descr -> bool

module Sample :
sig
  type t =
    | Int of Big_int.big_int
    | Atom of atom
    | Char of Chars.Unichar.t
    | Pair of t * t
    | Record of (label * t) list
    | Fun of (node * node) list

  val get : descr -> t
        (** 
          Extract a sample value from a non empty type;
          raise Not_found for an empty type
        **)
end

module Print :
sig
  val register_global : string -> descr -> unit

  val print : Format.formatter -> node -> unit
  val print_descr: Format.formatter -> descr -> unit
  val print_sample : Format.formatter -> Sample.t -> unit
end

val check: descr -> unit
1	type label = int
2	type atom = int
3	type const = Integer of Big_int.big_int \| Atom of atom \| Char of Chars.Unichar.t
4
5	( Algebra )
6
7	type node
8	type descr
9
10	val make: unit -> node
11	val define: node -> descr -> unit
12
13	val cons: descr -> node
14	val internalize: node -> node
15
16	val id: node -> int
17	val descr: node -> descr
18
19	val equal_descr: descr -> descr -> bool
20	val hash_descr: descr -> int
21
22
23	module DescrHash: Hashtbl.S with type key = descr
24
25	( Boolean connectives )
26
27	val cup : descr -> descr -> descr
28	val cap : descr -> descr -> descr
29	val diff : descr -> descr -> descr
30	val neg : descr -> descr
31	val empty : descr
32	val any : descr
33
34	( Constructors )
35
36	val interval : Big_int.big_int -> Big_int.big_int -> descr
37	val atom : atom Atoms.t -> descr
38	val times : node -> node -> descr
39	val arrow : node -> node -> descr
40	val record : label -> bool -> node -> descr
41	val char : Chars.t -> descr
42	val constant : const -> descr
43
44	( Positive systems and least solutions )
45
46	module Positive :
47	sig
48	type v
49	val forward: unit -> v
50	val define: v -> v -> unit
51	val ty: descr -> v
52	val cup: v list -> v
53	val times: v -> v -> v
54
55	val solve: v -> node
56	end
57
58	( Labels and atom names )
59
60	val mk_atom : string -> atom
61	val atom_name : atom -> string
62
63	val label : string -> label
64	val label_name : label -> string
65
66	( Normalization )
67
68	module Product : sig
69	val any : descr
70	val other : descr -> descr
71	val is_product : descr -> bool
72
73	(* List of non-empty rectangles *)
74	type t = (descr * descr) list
75	val is_empty: t -> bool
76	val get: descr -> t
77	val pi1: t -> descr
78	val pi2: t -> descr
79
80	(* Intersection with (pi1,Any) *)
81	val restrict_1: t -> descr -> t
82
83	(* List of non-empty rectangles whose first projection
84	are pair-wise disjunct *)
85	type normal = t
86	val normal: descr -> normal
87
88	val need_second: t -> bool
89	(* Is there more than a single rectangle ? *)
90	end
91
92	module Record : sig
93	val any : descr
94
95	(* List of maps label -> (optional, content) *)
96	type t = (label, (bool * descr)) SortedMap.t list
97	val get: descr -> t
98	val is_empty: t -> bool
99	val restrict_label_present: t -> label -> t
100	val restrict_field: t -> label -> descr -> t
101	val restrict_label_absent: t -> label -> t
102	val project_field: t -> label -> descr
103
104	type normal =
105	[ `Success
106	\| `Fail
107	\| `Label of label * (descr * normal) list * normal ]
108	val normal: descr -> normal
109
110	val project : descr -> label -> descr
111	(* Raise Not_found if label is not necessarily present *)
112	end
113
114	module Arrow : sig
115	val any : descr
116
117	val check_strenghten: descr -> descr -> descr
118	(* [check_strenghten t s]
119	Assume that [t] is an intersection of arrow types
120	representing the interface of an abstraction;
121	check that this abstraction has type [s] (otherwise raise Not_found)
122	and returns a refined type for this abstraction.
123	*)
124
125	type t
126	val is_empty: t -> bool
127	val get: descr -> t
128	(* Always succeed; no check <= Arrow.any *)
129
130	val domain: t -> descr
131	val apply: t -> descr -> descr
132	(* Always succeed; no check on the domain *)
133
134	val need_arg : t -> bool
135	(* True if the type of the argument is needed to obtain
136	the type of the result (must use [apply]; otherwise,
137	[apply_noarg] is enough *)
138	val apply_noarg : t -> descr
139	end
140
141
142	module Int : sig
143	val any : descr
144
145	val is_int : descr -> bool
146	val get: descr -> Intervals.t
147	val put: Intervals.t -> descr
148	end
149
150	module Atom : sig
151	val has_atom : descr -> atom -> bool
152	end
153
154	val normalize : node -> node
155
156	( Subtyping and sample values )
157
158	val is_empty : descr -> bool
159	val non_empty: descr -> bool
160	val subtype : descr -> descr -> bool
161
162	module Sample :
163	sig
164	type t =
165	\| Int of Big_int.big_int
166	\| Atom of atom
167	\| Char of Chars.Unichar.t
168	\| Pair of t * t
169	\| Record of (label * t) list
170	\| Fun of (node * node) list
171
172	val get : descr -> t
173	(**
174	Extract a sample value from a non empty type;
175	raise Not_found for an empty type
176	**)
177	end
178
179	module Print :
180	sig
181	val register_global : string -> descr -> unit
182
183	val print : Format.formatter -> node -> unit
184	val print_descr: Format.formatter -> descr -> unit
185	val print_sample : Format.formatter -> Sample.t -> unit
186	end
187
188	val check: descr -> unit