/[mojave]/metaprl/theories/tactic/mptop.ml
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Revision 2577 - (hide annotations) (download)
Thu Jan 28 18:44:05 1999 UTC (22 years, 6 months ago) by jyh
File size: 22236 byte(s)
Upgraded to OCaml 2.01.

1 jyh 2494 (*
2     * Define a resource to evaluate toplevel expressions.
3     *
4     * ----------------------------------------------------------------
5     *
6     * This file is part of MetaPRL, a modular, higher order
7     * logical framework that provides a logical programming
8     * environment for OCaml and other languages.
9     *
10     * See the file doc/index.html for information on Nuprl,
11     * OCaml, and more information about this system.
12     *
13     * Copyright (C) 1998 Jason Hickey, Cornell University
14 jyh 2525 *
15 jyh 2494 * This program is free software; you can redistribute it and/or
16     * modify it under the terms of the GNU General Public License
17     * as published by the Free Software Foundation; either version 2
18     * of the License, or (at your option) any later version.
19 jyh 2525 *
20 jyh 2494 * This program is distributed in the hope that it will be useful,
21     * but WITHOUT ANY WARRANTY; without even the implied warranty of
22     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23     * GNU General Public License for more details.
24 jyh 2525 *
25 jyh 2494 * You should have received a copy of the GNU General Public License
26     * along with this program; if not, write to the Free Software
27     * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 jyh 2525 *
29 jyh 2494 * Author: Jason Hickey
30     * jyh@cs.cornell.edu
31     *)
32    
33     open MLast
34    
35     open Refiner.Refiner.TermType
36     open Refiner.Refiner.RefineError
37     open Mp_resource
38    
39     open Tactic_type
40     open Rewrite_type
41    
42     (************************************************************************
43     * TYPES *
44     ************************************************************************)
45    
46     (*
47     * These are the values that we recognize.
48     *)
49     type expr =
50     (* Base types *)
51     UnitExpr of unit
52     | BoolExpr of bool
53     | IntExpr of int
54     | StringExpr of string
55     | TermExpr of term
56     | TacticExpr of tactic
57     | ConvExpr of conv
58    
59     (* Uptyped tuples and functions *)
60     | ListExpr of expr list
61     | TupleExpr of expr list
62     | FunExpr of (expr -> expr)
63    
64     (* Common cases are typed *)
65     | UnitFunExpr of (unit -> expr)
66     | BoolFunExpr of (bool -> expr)
67     | IntFunExpr of (int -> expr)
68     | StringFunExpr of (string -> expr)
69     | TermFunExpr of (term -> expr)
70     | TacticFunExpr of (tactic -> expr)
71     | IntTacticFunExpr of ((int -> tactic) -> expr)
72     | ConvFunExpr of (conv -> expr)
73    
74     (* These functions take lists *)
75     | AddrFunExpr of (int list -> expr)
76     | StringListFunExpr of (string list -> expr)
77     | TermListFunExpr of (term list -> expr)
78     | TacticListFunExpr of (tactic list -> expr)
79     | ConvListFunExpr of (conv list -> expr)
80    
81     (*
82     * The resource maps strings to values.
83     *)
84     type top_data =
85     Empty
86     | Label of string * top_data
87     | Expr of string * expr * top_data
88     | Join of top_data * top_data
89    
90     type top_table =
91     (string, string * expr) Hashtbl.t
92    
93     resource (string * expr, top_table, top_data) toploop_resource
94    
95     (************************************************************************
96     * IMPLEMENTATION *
97     ************************************************************************)
98    
99     (*
100     * Construct a hash table of all the values.
101     * As in ML, the newer values override the previous.
102     *)
103     let collect_table data =
104     let hash = Hashtbl.create 201 in
105     let rec collect mod_name labels = function
106     Empty ->
107     labels
108     | (Label (mod_name, next)) as label ->
109     if List.memq label labels then
110     labels
111     else
112     collect mod_name (label :: labels) next
113     | Expr (name, expr, next) ->
114     let labels = collect mod_name labels next in
115     Hashtbl.add hash name (mod_name, expr);
116     labels
117    
118     | Join (next1, next2) ->
119     let labels = collect mod_name labels next1 in
120     collect mod_name labels next2
121     in
122 jyh 2577 let _ = collect "." [] data in
123 jyh 2494 hash
124    
125     (*
126     * Keep a list of labeled resources for lookup
127     * by the toploop.
128     *)
129     let resources = ref []
130    
131     let save data =
132     resources := data :: !resources
133    
134     let get_resource name =
135     let rec search = function
136     { resource_data = Label (name', _) } as rsrc :: tl ->
137     if name' = name then
138     rsrc
139     else
140     search tl
141     | _ :: tl ->
142     search tl
143     | [] ->
144     raise Not_found
145     in
146     search !resources
147    
148     (*
149     * Wrap up the joiner.
150     *)
151     let rec join_resource { resource_data = base1 } { resource_data = base2 } =
152     { resource_data = Join (base1, base2);
153     resource_join = join_resource;
154     resource_extract = extract_resource;
155     resource_improve = improve_resource;
156     resource_close = close_resource
157     }
158    
159     and extract_resource { resource_data = data } =
160     collect_table data
161    
162     and improve_resource { resource_data = data } (name, expr) =
163     { resource_data = Expr (name, expr, data);
164     resource_join = join_resource;
165     resource_extract = extract_resource;
166     resource_improve = improve_resource;
167     resource_close = close_resource
168     }
169    
170     and close_resource { resource_data = data } mod_name =
171     let rsrc =
172     { resource_data = Label (String.capitalize mod_name, data);
173     resource_join = join_resource;
174     resource_extract = extract_resource;
175     resource_improve = improve_resource;
176     resource_close = close_resource
177     }
178     in
179     save rsrc;
180     rsrc
181    
182     (************************************************************************
183     * COMPILING *
184     ************************************************************************)
185    
186     (*
187     * Right now most things are not supported.
188     *)
189     let not_supported loc str =
190 nogin 2502 Stdpp.raise_with_loc loc (RefineError ("mptop", StringStringError ("operation is not implemented", str)))
191 jyh 2494
192     let type_error loc str =
193     Stdpp.raise_with_loc loc (RefineError ("type error", StringError str))
194    
195     (*
196     * Convert a list to a term list.
197     *)
198     let some_list_of_list f loc = function
199     ListExpr l ->
200     List.map f l
201     | _ ->
202     type_error loc "expr should be a list"
203    
204     let term_expr loc = function
205     TermExpr t ->
206     t
207     | _ ->
208     type_error loc "expr should be a term"
209    
210     let int_expr loc = function
211     IntExpr t ->
212     t
213     | _ ->
214     type_error loc "expr should be an int"
215    
216     let string_expr loc = function
217     StringExpr t ->
218     t
219     | _ ->
220     type_error loc "expr should be a string"
221    
222     let tactic_expr loc = function
223     TacticExpr t ->
224     t
225     | _ ->
226     type_error loc "expr should be a tactic"
227    
228     let conv_expr loc = function
229     ConvExpr t ->
230     t
231     | _ ->
232     type_error loc "expr should be a conv"
233    
234     let term_list_of_list loc = some_list_of_list (term_expr loc) loc
235     let int_list_of_list loc = some_list_of_list (int_expr loc) loc
236     let string_list_of_list loc = some_list_of_list (string_expr loc) loc
237     let tactic_list_of_list loc = some_list_of_list (tactic_expr loc) loc
238     let conv_list_of_list loc = some_list_of_list (conv_expr loc) loc
239    
240     (*
241     * Want an int tactic.
242     *)
243     let int_tactic_expr loc = function
244     IntFunExpr f ->
245     (fun i ->
246     match f i with
247     TacticExpr tac ->
248     tac
249     | _ ->
250     type_error loc "int tactic expected")
251     | _ ->
252     type_error loc "int tactic expected"
253    
254     (*
255     * Lookup a variable from the table.
256     *)
257     let rec mk_var_expr base loc v =
258     try snd (Hashtbl.find base v) with
259     Not_found ->
260     Stdpp.raise_with_loc loc (RefineError ("mk_var_expr", StringStringError ("undefined variable", v)))
261    
262     and mk_proj_expr base loc expr =
263     let rec search modname v = function
264     (modname', expr) :: tl ->
265     if modname' = modname then
266     expr
267     else
268     search modname v tl
269     | [] ->
270     Stdpp.raise_with_loc loc (**)
271     (RefineError ("mk_proj_expr",
272     StringStringError ("undefined variable", modname ^ "." ^ v)))
273     in
274     let lookup names v =
275     match names with
276     [modname] ->
277     begin
278     try search modname v (Hashtbl.find_all base v) with
279     Not_found ->
280     Stdpp.raise_with_loc loc (**)
281     (RefineError ("mk_proj_expr",
282     StringStringError ("undefined variable", modname ^ "." ^ v)))
283     end
284     | _ ->
285     Stdpp.raise_with_loc loc (**)
286     (RefineError ("mk_proj_expr", StringError "nested modules are not implemented"))
287     in
288     let rec collect names expr =
289     match expr with
290     (<:expr< $uid: name$ . $e2$ >>) ->
291     collect (name :: names) e2
292     | (<:expr< $lid: v$ >>) ->
293     lookup names v
294     | _ ->
295     not_supported loc "expr projection"
296     in
297     collect [] expr
298    
299     (*
300     * For an application, we lookup the function and try to
301     * specialize the argument.
302     *)
303     and mk_apply_expr base loc f a =
304     let a = mk_expr base a in
305     match mk_expr base f with
306     FunExpr f ->
307     f a
308     | UnitFunExpr f ->
309     begin
310     match a with
311     UnitExpr () ->
312     f ()
313     | _ ->
314     type_error loc "expr should be unit"
315     end
316     | BoolFunExpr f ->
317     begin
318     match a with
319     BoolExpr a ->
320     f a
321     | _ ->
322     type_error loc "expr should be a bool"
323     end
324     | IntFunExpr f ->
325     begin
326     match a with
327     IntExpr a ->
328     f a
329     | _ ->
330     type_error loc "expr should be int"
331     end
332     | StringFunExpr f ->
333     begin
334     match a with
335     StringExpr a ->
336     f a
337     | _ ->
338     type_error loc "expr should be a string"
339     end
340     | TermFunExpr f ->
341     begin
342     match a with
343     TermExpr a ->
344     f a
345     | _ ->
346     type_error loc "expr should be a term"
347     end
348     | TacticFunExpr f ->
349     begin
350     match a with
351     TacticExpr a ->
352     f a
353     | _ ->
354     type_error loc "expr should be a tactic"
355     end
356     | IntTacticFunExpr f ->
357     f (int_tactic_expr loc a)
358     | ConvFunExpr f ->
359     begin
360     match a with
361     ConvExpr a ->
362     f a
363     | _ ->
364     type_error loc "expr should be a conversion"
365     end
366    
367     | AddrFunExpr f ->
368     f (int_list_of_list loc a)
369     | StringListFunExpr f ->
370     f (string_list_of_list loc a)
371     | TermListFunExpr f ->
372     f (term_list_of_list loc a)
373     | TacticListFunExpr f ->
374     f (tactic_list_of_list loc a)
375     | ConvListFunExpr f ->
376     f (conv_list_of_list loc a)
377     | UnitExpr _
378     | BoolExpr _
379     | IntExpr _
380     | StringExpr _
381     | TermExpr _
382     | TacticExpr _
383     | ConvExpr _
384     | ListExpr _
385     | TupleExpr _ ->
386     type_error loc "expr should be a function"
387    
388     (*
389     * A tuple of expressions.
390     * We only support unit for now.
391     *)
392     and mk_tuple_expr base loc = function
393     [] ->
394     UnitExpr ()
395     | _ ->
396     not_supported loc "tuple expression"
397    
398     and mk_expr base expr =
399     let loc = loc_of_expr expr in
400     match expr with
401     (<:expr< $e1$ . $e2$ >> as expr) ->
402     mk_proj_expr base loc expr
403     | (<:expr< $e1$ $e2$ >>) ->
404     mk_apply_expr base loc e1 e2
405     | (<:expr< $e1$ .( $e2$ ) >>) ->
406     not_supported loc "array subscript"
407     | (<:expr< [| $list:el$ |] >>) ->
408     not_supported loc "array"
409     | (<:expr< $e1$ := $e2$ >>) ->
410     not_supported loc "assignment"
411     | (<:expr< $chr:c$ >>) ->
412     not_supported loc "char"
413     (*
414     | (<:expr< ( $e$ :> $t$ ) >>) ->
415     *)
416     | MLast.ExCoe (_, e, t) ->
417     not_supported loc "class coercion"
418     | (<:expr< $flo:s$ >>) ->
419     not_supported loc "float"
420     | (<:expr< for $s$ = $e1$ $to:b$ $e2$ do $list:el$ done >>) ->
421     not_supported loc "for loop"
422     | (<:expr< fun [ $list:pwel$ ] >>) ->
423     not_supported loc "fun"
424     | (<:expr< if $e1$ then $e2$ else $e3$ >>) ->
425     not_supported loc "ifthenelse"
426     | (<:expr< $int:s$ >>) ->
427     IntExpr (int_of_string s)
428     | (<:expr< let $rec:b$ $list:pel$ in $e$ >>) ->
429     not_supported loc "let"
430     | (<:expr< $lid:s$ >>) ->
431     mk_var_expr base loc s
432     | MLast.ExLmd _ ->
433     not_supported loc "local module"
434     | (<:expr< match $e$ with [ $list:pwel$ ] >>) ->
435     not_supported loc "match"
436     (*
437     | (<:expr< new $e$ >>) ->
438     *)
439     | MLast.ExNew _ ->
440     not_supported loc "new"
441     (*
442     | (<:expr< {< $list:sel$ >} >>) ->
443     *)
444     | MLast.ExOvr _ ->
445     not_supported loc "stream"
446     (*
447     | (<:expr< { $list:eel$ } >>) ->
448     *)
449     | MLast.ExRec _ ->
450     not_supported loc "record"
451     | (<:expr< do $list:el$ return $e$ >>) ->
452     not_supported loc "do"
453     (*
454     | (<:expr< $e$ # $i$ >>) ->
455     *)
456     | MLast.ExSnd _ ->
457     not_supported loc "class projection"
458     | (<:expr< $e1$ .[ $e2$ ] >>) ->
459     not_supported loc "string subscript"
460     | (<:expr< $str:s$ >>) ->
461     StringExpr s
462     | (<:expr< try $e$ with [ $list:pwel$ ] >>) ->
463     not_supported loc "try"
464     | (<:expr< ( $list:el$ ) >>) ->
465     mk_tuple_expr base loc el
466     | (<:expr< ( $e$ : $t$ ) >>) ->
467     mk_expr base e
468     | (<:expr< $uid:s$ >>) ->
469 jyh 2525 mk_var_expr base loc s
470 jyh 2494 | (<:expr< while $e$ do $list:el$ done >>) ->
471     not_supported loc "while"
472     | MLast.ExAnt (_, e) ->
473     not_supported loc "ExAnt"
474    
475     and mk_patt base patt =
476     let loc = loc_of_patt patt in
477     match patt with
478     (<:patt< $p1$ . $p2$ >>) ->
479     not_supported loc "patt projection"
480     | (<:patt< ( $p1$ as $p2$ ) >>) ->
481     not_supported loc "patt"
482     | (<:patt< _ >>) ->
483     not_supported loc "wild pattern"
484     | (<:patt< $p1$ $p2$ >>) ->
485     not_supported loc "pattern application"
486     | (<:patt< [| $list: pl$ |] >>) ->
487     not_supported loc "array patterns"
488     | (<:patt< $chr:c$ >>) ->
489     not_supported loc "pattern char"
490     | (<:patt< $int:s$ >>) ->
491     not_supported loc "pattern int"
492     | (<:patt< $lid:v$ >>) ->
493     not_supported loc "pattern var"
494     | (<:patt< $p1$ | $p2$ >>) ->
495     not_supported loc "pattern choice"
496     | (<:patt< $p1$ .. $p2$ >>) ->
497     not_supported loc "pattern range"
498     | (<:patt< { $list:ppl$ } >>) ->
499     not_supported loc "pattern list"
500     | (<:patt< $str:s$ >>) ->
501     not_supported loc "pattern string"
502     | (<:patt< ( $list:pl$ ) >>) ->
503     not_supported loc "pattern list"
504     | (<:patt< ( $p$ : $t'$ ) >>) ->
505     not_supported loc "pattern cast"
506     | (<:patt< $uid:s$ >>) ->
507     not_supported loc "pattern uid"
508     | MLast.PaAnt (_, p) ->
509     not_supported loc "pattern PaAnt"
510    
511     and mk_type base t =
512     let loc = loc_of_ctyp t in
513     match t with
514     (<:ctyp< $t1$ . $t2$ >>) ->
515     not_supported loc "type projection"
516     | (<:ctyp< $t1$ as $t2$ >>) ->
517     not_supported loc "type"
518     | (<:ctyp< _ >>) ->
519     not_supported loc "type wildcard"
520     | (<:ctyp< $t1$ $t2$ >>) ->
521     not_supported loc "type application"
522     | (<:ctyp< $t1$ -> $t2$ >>) ->
523     not_supported loc "type function"
524     (*
525     | (<:ctyp< # $i$ >>) ->
526     *)
527     | MLast.TyCls _ ->
528     not_supported loc "type method"
529     | (<:ctyp< $lid:s$ >>) ->
530     not_supported loc "type var"
531     | (<:ctyp< '$s$ >>) ->
532     not_supported loc "type param"
533     | (<:ctyp< $t1$ == $t2$ >>) ->
534     not_supported loc "type equality"
535 jyh 2577 (*
536 jyh 2494 | (<:ctyp< < $list:stl$ $dd:b$ > >>) ->
537 jyh 2577 *)
538     | MLast.TyObj (loc, _, _) ->
539 jyh 2494 not_supported loc "type class"
540     | (<:ctyp< { $list:sbtl$ } >>) ->
541     not_supported loc "type record"
542     | (<:ctyp< [ $list:stll$ ] >>) ->
543     not_supported loc "type list"
544     | (<:ctyp< ( $list:tl$ ) >>) ->
545     not_supported loc "type product"
546     | (<:ctyp< $uid:s$ >>) ->
547     not_supported loc "type constructor var"
548    
549     and mk_sig_item base si =
550     let loc = loc_of_sig_item si in
551     match si with
552     (*
553     (<:sig_item< class $list:ctl$ >>) ->
554     *)
555     MLast.SgCls _
556     | MLast.SgClt _ ->
557     not_supported loc "sig class"
558     | (<:sig_item< declare $list:sil$ end >>) ->
559     mk_sig_item base (List_util.last sil)
560     | (<:sig_item< exception $s$ of $list:tl$ >>) ->
561     not_supported loc "sig exception"
562     | (<:sig_item< external $s$ : $t$ = $list:sl$ >>) ->
563     not_supported loc "sig external"
564     | SgInc (_, mt) ->
565     not_supported loc "sig SgInc"
566     | (<:sig_item< module $s$ : $mt$ >>) ->
567     not_supported loc "sig module"
568     | (<:sig_item< module type $s$ = $mt$ >>) ->
569     not_supported loc "sig module type"
570     | (<:sig_item< open $sl$ >>) ->
571     not_supported loc "sig open"
572     | (<:sig_item< type $list:ssltl$ >>) ->
573     not_supported loc "sig type"
574     | (<:sig_item< value $s$ : $t$ >>) ->
575     not_supported loc "sig value"
576    
577     and mk_str_item base si =
578     let loc = loc_of_str_item si in
579     match si with
580     (*
581     (<:str_item< class $list:cdl$ >>) ->
582     *)
583     MLast.StCls _
584     | MLast.StClt _ ->
585     not_supported loc "str class"
586     | (<:str_item< declare $list:stl$ end >>) ->
587     mk_str_item base (List_util.last stl)
588     | (<:str_item< exception $s$ of $list:tl$ >>) ->
589     not_supported loc "str exception"
590     | (<:str_item< $exp:e$ >>) ->
591     mk_expr base e
592     | (<:str_item< external $s$ : $t$ = $list:sl$ >>) ->
593     not_supported loc "str external"
594     | (<:str_item< module $s$ = $me$ >>) ->
595     not_supported loc "str module"
596     | (<:str_item< module type $s$ = $mt$ >>) ->
597     not_supported loc "str module type"
598     | (<:str_item< open $sl$ >>) ->
599     not_supported loc "str module open"
600     | (<:str_item< type $list:ssltl$ >>) ->
601     not_supported loc "str type"
602     | (<:str_item< value $rec:b$ $list:pel$ >>) ->
603     not_supported loc "str let"
604    
605     and mk_module_type base mt =
606     let loc = loc_of_module_type mt in
607     match mt with
608     (<:module_type< $mt1$ . $mt2$ >>) ->
609     not_supported loc "module type projection"
610     | (<:module_type< $mt1$ $mt2$ >>) ->
611     not_supported loc "module type application"
612     | (<:module_type< functor ( $s$ : $mt1$ ) -> $mt2$ >>) ->
613     not_supported loc "module type functor"
614     | (<:module_type< $lid:i$ >>) ->
615     not_supported loc "module type var"
616     | (<:module_type< sig $list:sil$ end >>) ->
617     not_supported loc "module type sig"
618     | (<:module_type< $uid:i$ >>) ->
619     not_supported loc "module type var"
620     | (<:module_type< $mt$ with $list:wcl$ >>) ->
621     not_supported loc "module type constraint"
622    
623     and mk_wc base = function
624     WcTyp (loc, sl1, sl2, t) ->
625     not_supported loc "with clause type"
626     | WcMod (loc, sl1, mt) ->
627     not_supported loc "with clause module"
628    
629     and mk_module_expr base me =
630     let loc = loc_of_module_expr me in
631     match me with
632     (<:module_expr< $me1$ . $me2$ >>) ->
633     not_supported loc "module expr projection"
634     | (<:module_expr< $me1$ $me2$ >>) ->
635     not_supported loc "module expr application"
636     | (<:module_expr< functor ( $s$ : $mt$ ) -> $me$ >>) ->
637     not_supported loc "module expr functor"
638     | (<:module_expr< struct $list:sil$ end >>) ->
639     not_supported loc "module expr struct"
640     | (<:module_expr< ( $me$ : $mt$) >>) ->
641     not_supported loc "module expr type"
642     | (<:module_expr< $uid:i$ >>) ->
643     not_supported loc "module expr id"
644    
645     (************************************************************************
646     * RESOURCES *
647     ************************************************************************)
648    
649     (*
650     * Include the common library functions.
651     *)
652     let int_int_fun_int_expr f =
653     IntFunExpr (fun i -> IntFunExpr (fun j -> IntExpr (f i j)))
654    
655 jyh 2525 let cons_expr =
656     FunExpr (fun e1 ->
657     FunExpr (fun e2 ->
658     match e2 with
659     ListExpr e2 ->
660     ListExpr (e1 :: e2)
661     | _ ->
662     raise (RefineError ("cons_expr", StringError "type mismatch"))))
663    
664 jyh 2494 let values =
665     ["+", int_int_fun_int_expr ( + );
666     "-", int_int_fun_int_expr ( - );
667     "*", int_int_fun_int_expr ( * );
668 jyh 2525 "/", int_int_fun_int_expr ( / );
669     "::", cons_expr;
670     "()", UnitExpr ();
671     "[]", ListExpr [];
672 jyh 2549 "True", BoolExpr true;
673     "False", BoolExpr false]
674 jyh 2494
675 jyh 2525
676 jyh 2494 let rec add_resources base = function
677     (name, expr) :: tl ->
678     add_resources (Expr (name, expr, base)) tl
679     | [] ->
680     base
681    
682     let toploop_resource =
683     { resource_data = add_resources Empty values;
684     resource_join = join_resource;
685     resource_extract = extract_resource;
686     resource_improve = improve_resource;
687     resource_close = close_resource
688     }
689    
690     let toploop_add
691     { resource_data = data;
692     resource_join = join_resource;
693     resource_extract = extract_resource;
694     resource_improve = improve_resource;
695     resource_close = close_resource
696     } values =
697     { resource_data = add_resources data values;
698     resource_join = join_resource;
699     resource_extract = extract_resource;
700     resource_improve = improve_resource;
701     resource_close = close_resource
702     }
703    
704     let expr_of_ocaml_expr = mk_expr
705     let expr_of_ocaml_str_item = mk_str_item
706    
707     (*
708     * -*-
709     * Local Variables:
710     * Caml-master: "refiner"
711     * End:
712     * -*-
713     *)

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