cduce.ml 7.41 KB
Newer Older
1
open Location
2
open Ident
3

4
let quiet = ref false
5
let toplevel = ref false
6

7
let typing_env = State.ref "Cduce.typing_env" Env.empty
8

9 10
let eval_env = State.ref "Cduce.eval_env" Env.empty

11
let enter_global_value x v t =
12
  eval_env := Env.add x v !eval_env;
13
  typing_env := Env.add x t !typing_env
14

15 16 17 18 19
let rec is_abstraction = function
  | Ast.Abstraction _ -> true
  | Ast.LocatedExpr (_,e) -> is_abstraction e
  | _ -> false

20
let print_norm ppf d = 
21
  Location.protect ppf 
22
    (fun ppf -> Types.Print.print ppf ((*Types.normalize*) d))
23

24 25 26 27
let print_sample ppf s =
  Location.protect ppf
    (fun ppf -> Sample.print ppf s)

28 29 30
let print_protect ppf s =
  Location.protect ppf (fun ppf -> Format.fprintf ppf "%s" s)

31

32 33
let print_value ppf v =
  Location.protect ppf (fun ppf -> Value.print ppf v)
34

35
let dump_env ppf =
36 37
  Format.fprintf ppf "Global types:";
  Typer.dump_global_types ppf;
38
  Format.fprintf ppf ".@.";
39
  Env.iter 
40
    (fun x v ->
41
       let t = Env.find x !typing_env in
42 43
       Format.fprintf ppf "@[val %a : @[%a = %a@]@]@."
	 U.print (Id.value x) print_norm t print_value v
44
    )
45 46
    !eval_env;
  Format.fprintf ppf "Namespaces:@.";
47
  Ns.dump_prefix_table ppf
48

49

50
let rec print_exn ppf = function
51 52 53
  | Location (loc, w, exn) ->
      Format.fprintf ppf "Error %a:@." Location.print_loc (loc,w);
      Format.fprintf ppf "%a" Location.html_hilight (loc,w);
54
      print_exn ppf exn
55
  | Value.CDuceExn v ->
56
      Format.fprintf ppf "Uncaught CDuce exception: @[%a@]@."
57
        print_value v
58
  | Eval.MultipleDeclaration v ->
59
      Format.fprintf ppf "Multiple declaration for global value %a@." 
60
        U.print (Id.value v)
61
  | Typer.WrongLabel (t,l) ->
62
      Format.fprintf ppf "Wrong record selection; field %a " 
63
        Label.print (LabelPool.value l);
64
      Format.fprintf ppf "not present in an expression of type:@.%a@."
65
        print_norm t
66
  | Typer.ShouldHave (t,msg) ->
67
      Format.fprintf ppf "This expression should have type:@.%a@.%s@." 
68
        print_norm t
69
        msg
70
  | Typer.ShouldHave2 (t1,msg,t2) ->
71
      Format.fprintf ppf "This expression should have type:@.%a@.%s %a@." 
72 73 74
        print_norm t1
        msg
        print_norm t2
75
  | Typer.Error s ->
76
      Format.fprintf ppf "%s@." s
77
  | Typer.Constraint (s,t) ->
78
      Format.fprintf ppf "This expression should have type:@.%a@." 
79
        print_norm t;
80
      Format.fprintf ppf "but its inferred type is:@.%a@." 
81
        print_norm s;
82
      Format.fprintf ppf "which is not a subtype, as shown by the sample:@.%a@." 
83
	print_sample (Sample.get (Types.diff s t))
84
  | Typer.NonExhaustive t ->
85 86
      Format.fprintf ppf "This pattern matching is not exhaustive@.";
      Format.fprintf ppf "Residual type:@.%a@."
87
	print_norm t;
88
      Format.fprintf ppf "Sample:@.%a@." print_sample (Sample.get t)
89
  | Typer.UnboundId x ->
90
      Format.fprintf ppf "Unbound identifier %a@." U.print (Id.value x)
91
  | Wlexer.Illegal_character c ->
92
      Format.fprintf ppf "Illegal character (%s)@." (Char.escaped c)
93
  | Wlexer.Unterminated_comment ->
94
      Format.fprintf ppf "Comment not terminated@."
95
  | Wlexer.Unterminated_string ->
96
      Format.fprintf ppf "String literal not terminated@."
97
  | Wlexer.Unterminated_string_in_comment ->
98
      Format.fprintf ppf "This comment contains an unterminated string literal@."
99
  | Parser.Error s | Stream.Error s -> 
100
      Format.fprintf ppf "Parsing error: %s@." s
101
  | Location.Generic s ->
102
      Format.fprintf ppf "%s@." s
103
  | exn ->
104
(*      raise exn *)
105
      Format.fprintf ppf "%s@." (Printexc.to_string exn)
106

107
let debug ppf = function
108
  | `Subtype (t1,t2) ->
109
      Format.fprintf ppf "[DEBUG:subtype]@.";
110 111
      let t1 = Types.descr (Typer.typ t1)
      and t2 = Types.descr (Typer.typ t2) in
112 113
      let s = Types.subtype t1 t2 in
      Format.fprintf ppf "%a %a %a : %b@." print_norm t1 print_protect "<=" print_norm t2 s
114
  | `Sample t ->
115 116 117 118 119 120
      Format.fprintf ppf "[DEBUG:sample]@.";
      (try
	 let t = Types.descr (Typer.typ t) in
	 Format.fprintf ppf "%a@." print_sample (Sample.get t)
       with Not_found ->
	 Format.fprintf ppf "Empty type : no sample !@.")
121
  | `Filter (t,p) -> 
122
      Format.fprintf ppf "[DEBUG:filter]@.";
123 124
      let t = Typer.typ t
      and p = Typer.pat p in
125 126
      let f = Patterns.filter (Types.descr t) p in
      List.iter (fun (x,t) ->
127
		   Format.fprintf ppf " %a:%a@." U.print (Id.value x)
128 129
		     print_norm (Types.descr t)) f
  | `Accept p ->
130
      Format.fprintf ppf "[DEBUG:accept]@.";
131
      let p = Typer.pat p in
132
      let t = Patterns.accept p in
133
      Format.fprintf ppf " %a@." Types.Print.print (Types.descr t)
134
  | `Compile (t,pl) ->
135
      Format.fprintf ppf "[DEBUG:compile]@.";
136 137
      let t = Typer.typ t
      and pl = List.map Typer.pat pl in
138
      Patterns.Compile.debug_compile ppf t pl
139

140 141 142 143
let insert_bindings ppf =
  List.iter2 
    (fun (x,t) (y,v) ->
       assert (x = y);
144 145 146
       typing_env := Env.add x t !typing_env;
       eval_env := Env.add x v !eval_env;
       if not !quiet then
147
	 Format.fprintf ppf "val %a : @[@[%a@] =@ @[%a@]@]@." 
148
	   U.print (Id.value x) print_norm t print_value v)
149
  
150 151 152 153 154
let rec collect_funs ppf accu = function
  | { descr = Ast.FunDecl e } :: rest -> 
      let (_,e) = Typer.expr e in
      collect_funs ppf (e::accu) rest
  | rest ->
155
      let typs = Typer.type_rec_funs !typing_env accu in
156
      Typer.report_unused_branches ();
157 158
      let vals = Eval.eval_rec_funs !eval_env accu in
      insert_bindings ppf typs vals;
159 160 161 162 163 164 165 166 167 168 169 170 171 172
      rest

let rec collect_types ppf accu = function
  | { descr = Ast.TypeDecl (x,t) } :: rest -> 
      collect_types ppf ((x,t) :: accu) rest
  | rest ->
      Typer.register_global_types accu;
      rest

let rec phrases ppf phs = match phs with
  | { descr = Ast.FunDecl _ } :: _ -> 
      phrases ppf (collect_funs ppf [] phs)
  | { descr = Ast.TypeDecl (_,_) } :: _ ->
      phrases ppf (collect_types ppf [] phs)
173 174 175
  | { descr = Ast.SchemaDecl (name, schema) } :: rest ->
      Typer.register_schema name schema;
      phrases ppf rest
176 177 178
  | { descr = Ast.Namespace (pr,ns) } :: rest ->
      Typer.register_ns_prefix pr ns;
      phrases ppf rest
179 180 181 182 183
  | { descr = Ast.EvalStatement e } :: rest ->
      let (fv,e) = Typer.expr e in
      let t = Typer.type_check !typing_env e Types.any true in
      Typer.report_unused_branches ();
      if not !quiet then
184
	Location.dump_loc ppf (e.Typed.exp_loc,`Full);
185 186
      let v = Eval.eval !eval_env e in
      if not !quiet then
187
	Format.fprintf ppf "- : @[@[%a@] =@ @[%a@]@]@." print_norm t print_value v;
188 189 190
      phrases ppf rest
  | { descr = Ast.LetDecl (p,e) } :: rest ->
      let decl = Typer.let_decl p e in
191
      let typs = Typer.type_let_decl !typing_env decl in
192
      Typer.report_unused_branches ();
193 194
      let vals = Eval.eval_let_decl !eval_env decl in
      insert_bindings ppf typs vals;
195 196
      phrases ppf rest
  | { descr = Ast.Debug l } :: rest -> 
197
      debug ppf l; 
198
      phrases ppf rest
199 200 201 202 203 204
  | { descr = Ast.Directive `Quit } :: rest ->
      if !toplevel then raise End_of_file;
      phrases ppf rest
  | { descr = Ast.Directive `Env } :: rest ->
      dump_env ppf;
      phrases ppf rest
205 206 207
  | [] -> ()

let run rule ppf ppf_err input =
208
  try 
209
    let p = 
210
      try rule input
211
      with
212
	| Stdpp.Exc_located (_, (Location _ as e)) ->
213
	    Parser.sync (); raise e
214
	| Stdpp.Exc_located ((i,j), e) -> 
215
	    Parser.sync (); raise_loc i j e
216
    in
217
    phrases ppf p;
218
    true
219
  with 
220 221 222
    | (End_of_file | Failure _ | Not_found | Invalid_argument _ | Sys.Break) 
	as e -> 
	raise e
223 224 225 226
    | exn -> 
	print_exn ppf_err exn;
	Format.fprintf ppf_err "@.";
	false
227

228
let script = run Parser.prog
229
let topinput = run Parser.top_phrases