1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
30 module Ast = NotationPt
31 module Env = NotationEnv
33 exception Parse_error of string
34 exception Level_not_found of int
36 let min_precedence = 0
37 let max_precedence = 100
39 type ('a,'b,'c,'d,'e) grammars = {
40 level1_pattern: 'a Grammar.Entry.e;
41 level2_ast: 'b Grammar.Entry.e;
42 level2_ast_grammar : Grammar.g;
43 term: 'b Grammar.Entry.e;
44 ident: 'e Grammar.Entry.e;
45 let_defs: 'c Grammar.Entry.e;
46 protected_binder_vars: 'd Grammar.Entry.e;
47 level2_meta: 'b Grammar.Entry.e;
50 type checked_l1_pattern = CL1P of NotationPt.term * int
52 let refresh_uri_in_checked_l1_pattern ~refresh_uri_in_term
53 ~refresh_uri_in_reference (CL1P (t,n))
55 CL1P (NotationUtil.refresh_uri_in_term ~refresh_uri_in_term
56 ~refresh_uri_in_reference t, n)
60 | Binding of string * Env.value_type
61 | Env of (string * Env.value_type) list
65 (int -> NotationPt.term,
67 (Ast.term Ast.capture_variable list *
68 Ast.term Ast.capture_variable * Ast.term * int) list,
69 Ast.term list * Ast.term option, Env.ident_or_var) grammars;
70 keywords: string list;
71 items: (string * Ast.term * (NotationEnv.t -> Ast.location -> Ast.term)) list
76 Pervasives.int_of_string s
78 failwith (sprintf "Lexer failure: string_of_int \"%s\" failed" s)
80 (** {2 Grammar extension} *)
82 let level_of precedence =
83 if precedence < min_precedence || precedence > max_precedence then
84 raise (Level_not_found precedence);
85 string_of_int precedence
87 let gram_symbol s = Gramext.Stoken ("SYMBOL", s)
88 let gram_ident status =
89 Gramext.Snterm (Grammar.Entry.obj
90 (status#notation_parser_db.grammars.ident : 'a Grammar.Entry.e))
91 (*Gramext.Stoken ("IDENT", s)*)
92 let gram_number s = Gramext.Stoken ("NUMBER", s)
93 let gram_keyword s = Gramext.Stoken ("", s)
94 let gram_term status = function
95 | Ast.Self _ -> Gramext.Sself
96 | Ast.Level precedence ->
99 (status#notation_parser_db.grammars.term : 'a Grammar.Entry.e),
103 let gram_of_literal =
105 | `Symbol s -> gram_symbol s
106 | `Keyword s -> gram_keyword s
107 | `Number s -> gram_number s
109 let make_action action bindings =
110 let rec aux (vl : NotationEnv.t) =
112 [] -> Gramext.action (fun (loc: Ast.location) -> action vl loc)
113 | NoBinding :: tl -> Gramext.action (fun _ -> aux vl tl)
114 (* LUCA: DEFCON 3 BEGIN *)
115 | Binding (name, Env.TermType l) :: tl ->
118 aux ((name, (Env.TermType l, Env.TermValue v))::vl) tl)
119 | Binding (name, Env.StringType) :: tl ->
121 (fun (v:Env.ident_or_var) ->
122 aux ((name, (Env.StringType, Env.StringValue v)) :: vl) tl)
123 | Binding (name, Env.NumType) :: tl ->
126 aux ((name, (Env.NumType, Env.NumValue v)) :: vl) tl)
127 | Binding (name, Env.OptType t) :: tl ->
129 (fun (v:'a option) ->
130 aux ((name, (Env.OptType t, Env.OptValue v)) :: vl) tl)
131 | Binding (name, Env.ListType t) :: tl ->
134 aux ((name, (Env.ListType t, Env.ListValue v)) :: vl) tl)
136 Gramext.action (fun (v:NotationEnv.t) -> aux (v @ vl) tl)
137 (* LUCA: DEFCON 3 END *)
139 aux [] (List.rev bindings)
145 | NoBinding :: tl -> aux acc tl
146 | Env names :: tl -> aux (List.rev names @ acc) tl
147 | Binding (name, ty) :: tl -> aux ((name, ty) :: acc) tl
151 (* given a level 1 pattern computes the new RHS of "term" grammar entry *)
152 let extract_term_production status pattern =
153 let rec aux = function
154 | Ast.AttributedTerm (_, t) -> aux t
155 | Ast.Literal l -> aux_literal l
156 | Ast.Layout l -> aux_layout l
157 | Ast.Magic m -> aux_magic m
158 | Ast.Variable v -> aux_variable v
160 prerr_endline (NotationPp.pp_term status t);
164 | `Symbol s -> [NoBinding, gram_symbol s]
166 (* assumption: s will be registered as a keyword with the lexer *)
167 [NoBinding, gram_keyword s]
168 | `Number s -> [NoBinding, gram_number s]
169 and aux_layout = function
170 | Ast.Sub (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\sub "] @ aux p2
171 | Ast.Sup (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\sup "] @ aux p2
172 | Ast.Below (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\below "] @ aux p2
173 | Ast.Above (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\above "] @ aux p2
174 | Ast.Frac (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\frac "] @ aux p2
175 | Ast.InfRule (p1, p2, p3) -> [NoBinding, gram_symbol "\\infrule "] @ aux p1 @ aux p2 @ aux p3
176 | Ast.Atop (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\atop "] @ aux p2
177 | Ast.Over (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\over "] @ aux p2
178 | Ast.Root (p1, p2) ->
179 [NoBinding, gram_symbol "\\root "] @ aux p2
180 @ [NoBinding, gram_symbol "\\of "] @ aux p1
181 | Ast.Sqrt p -> [NoBinding, gram_symbol "\\sqrt "] @ aux p
183 | Ast.Box (_, pl) -> List.flatten (List.map aux pl)
184 | Ast.Group pl -> List.flatten (List.map aux pl)
185 | Ast.Mstyle (_,pl) -> List.flatten (List.map aux pl)
186 | Ast.Mpadded (_,pl) -> List.flatten (List.map aux pl)
187 | Ast.Maction l -> List.flatten (List.map aux l)
188 and aux_magic magic =
191 let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
192 let action (env_opt : NotationEnv.t option) (loc : Ast.location) =
194 | Some env -> List.map Env.opt_binding_some env
195 | None -> List.map Env.opt_binding_of_name p_names
197 [ Env (List.map Env.opt_declaration p_names),
199 [ [ Gramext.Sopt (Gramext.srules [ p_atoms, p_action ]) ],
200 Gramext.action action ] ]
202 | Ast.List1 (p, _) ->
203 let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
204 let action (env_list : NotationEnv.t list) (loc : Ast.location) =
205 NotationEnv.coalesce_env p_names env_list
209 | Ast.List0 (_, None) -> Gramext.Slist0 s
210 | Ast.List1 (_, None) -> Gramext.Slist1 s
211 | Ast.List0 (_, Some l) -> Gramext.Slist0sep (s, gram_of_literal l,false)
212 | Ast.List1 (_, Some l) -> Gramext.Slist1sep (s, gram_of_literal l,false)
215 [ Env (List.map Env.list_declaration p_names),
217 [ [ gram_of_list (Gramext.srules [ p_atoms, p_action ]) ],
218 Gramext.action action ] ]
222 | Ast.NumVar s -> [Binding (s, Env.NumType), gram_number ""]
223 | Ast.TermVar (s,(Ast.Self level|Ast.Level level as lv)) ->
224 [Binding (s, Env.TermType level), gram_term status lv]
225 | Ast.IdentVar s -> [Binding (s, Env.StringType), gram_ident status]
226 | Ast.Ascription (p, s) -> assert false (* TODO *)
227 | Ast.FreshVar _ -> assert false
228 and inner_pattern p =
229 let p_bindings, p_atoms = List.split (aux p) in
230 let p_names = flatten_opt p_bindings in
232 make_action (fun (env : NotationEnv.t) (loc : Ast.location) -> env)
235 p_bindings, p_atoms, p_names, action
239 type rule_id = Grammar.token Gramext.g_symbol list
241 let compare_rule_id x y =
242 let rec aux = function
246 | ((s1::tl1) as x),((s2::tl2) as y) ->
247 if Gramext.eq_symbol s1 s2 then aux (tl1,tl2)
248 else Pervasives.compare x y
253 let check_l1_pattern level1_pattern pponly level associativity =
254 let variables = ref 0 in
255 let symbols = ref 0 in
256 let rec aux = function
257 | Ast.AttributedTerm (att, t) -> Ast.AttributedTerm (att,aux t)
258 | Ast.Literal _ as l -> incr symbols; l
259 | Ast.Layout l -> Ast.Layout (aux_layout l)
260 | Ast.Magic m -> Ast.Magic (aux_magic m)
261 | Ast.Variable v -> (aux_variable v)
263 and aux_layout = function
264 | Ast.Sub (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Sub (p1, p2)
265 | Ast.Sup (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Sup (p1, p2)
266 | Ast.Below (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Below (p1, p2)
267 | Ast.Above (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Above (p1, p2)
268 | Ast.Frac (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Frac (p1, p2)
269 | Ast.InfRule (p1, p2, p3) -> let p1 = aux p1 in let p2 = aux p2 in let p3 = aux p3 in Ast.InfRule (p1, p2, p3)
270 | Ast.Atop (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Atop (p1, p2)
271 | Ast.Over (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Over (p1, p2)
272 | Ast.Root (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Root (p1, p2)
273 | Ast.Sqrt p -> Ast.Sqrt (aux p)
274 | Ast.Break as t -> t
275 | Ast.Box (b, pl) -> Ast.Box(b, List.map aux pl)
276 | Ast.Group pl -> Ast.Group (List.map aux pl)
277 | Ast.Mstyle (l,pl) -> Ast.Mstyle (l, List.map aux pl)
278 | Ast.Mpadded (l,pl) -> Ast.Mpadded (l, List.map aux pl)
279 | Ast.Maction l as t ->
281 raise(Parse_error("Maction can be used only in output notations"))
283 and aux_magic magic =
285 | Ast.Opt p -> Ast.Opt (aux p)
286 | Ast.List0 (p, x) -> Ast.List0 (aux p, x)
287 | Ast.List1 (p, x) -> Ast.List1 (aux p, x)
291 | Ast.NumVar _ as t -> Ast.Variable t
292 | Ast.TermVar (s,Ast.Self _) when associativity <> Gramext.NonA ->
294 if !variables > 2 then
295 raise (Parse_error ("Exactly 2 variables must be specified in an "^
296 "associative notation"));
297 (match !variables, associativity with
299 Ast.Variable (Ast.TermVar (s, Ast.Self level))
300 | 1,Gramext.RightA ->
301 Ast.Variable (Ast.TermVar (s, Ast.Self (level+1)))
303 Ast.Variable (Ast.TermVar (s, Ast.Self (level+1)))
304 | 2,Gramext.RightA ->
305 Ast.Variable (Ast.TermVar (s, Ast.Level (level-1)))
307 | Ast.TermVar (s,Ast.Level _) when associativity <> Gramext.NonA ->
308 raise (Parse_error ("Variables can not be declared with a " ^
309 "precedence in an associative notation"))
310 (*avoid camlp5 divergence due to non-Sself recursion at the same level *)
311 | Ast.TermVar (s,Ast.Level l) when l<=level && !variables=0 && !symbols=0->
312 raise(Parse_error("Left recursive rule with precedence not greater " ^
313 "than " ^ string_of_int level ^ " is not allowed to avoid divergence"))
314 | Ast.TermVar _ as t -> incr variables; Ast.Variable t
315 | Ast.IdentVar _ as t -> Ast.Variable t
316 | Ast.Ascription _ -> assert false (* TODO *)
317 | Ast.FreshVar _ -> assert false
319 if associativity <> Gramext.NonA && level = min_precedence then
320 raise (Parse_error ("You can not specify an associative notation " ^
321 "at level "^string_of_int min_precedence ^ "; increase it"));
322 let cp = aux level1_pattern in
323 (* prerr_endline ("checked_pattern: " ^ NotationPp.pp_term cp); *)
324 if !variables <> 2 && associativity <> Gramext.NonA then
325 raise (Parse_error ("Exactly 2 variables must be specified in an "^
326 "associative notation"));
332 let fold_cluster binder terms ty body =
334 (fun term body -> Ast.Binder (binder, (term, ty), body))
335 terms body (* terms are names: either Ident or FreshVar *)
337 let fold_exists terms ty body =
340 let lambda = Ast.Binder (`Lambda, (term, ty), body) in
341 Ast.Appl [ Ast.Symbol ("exists", 0); lambda ])
344 let fold_binder binder pt_names body =
346 (fun (names, ty) body -> fold_cluster binder names ty body)
349 let return_term loc term = Ast.AttributedTerm (`Loc loc, term)
350 let return_term_of_level loc term l =
351 Ast.AttributedTerm (`Loc loc, term l)
353 (** {2 API implementation} *)
355 let exc_located_wrapper f =
359 | Stdpp.Exc_located (floc, Stream.Error msg) ->
360 raise (HExtlib.Localized (floc, Parse_error msg))
361 | Stdpp.Exc_located (floc, HExtlib.Localized (_,exn)) ->
362 raise (HExtlib.Localized (floc, (Parse_error (Printexc.to_string exn))))
363 | Stdpp.Exc_located (floc, exn) ->
364 raise (HExtlib.Localized (floc, (Parse_error (Printexc.to_string exn))))
366 let parse_level1_pattern grammars precedence lexbuf =
368 (fun () -> Grammar.Entry.parse grammars.level1_pattern (Obj.magic lexbuf) precedence)
370 let parse_level2_ast grammars lexbuf =
372 (fun () -> Grammar.Entry.parse grammars.level2_ast (Obj.magic lexbuf))
374 let parse_level2_meta grammars lexbuf =
376 (fun () -> Grammar.Entry.parse grammars.level2_meta (Obj.magic lexbuf))
378 (* create empty precedence level for "term" *)
379 let initialize_grammars grammars =
381 Gramext.action (fun _ ->
382 failwith "internal error, lexer generated a dummy token")
384 (* Needed since campl4 on "delete_rule" remove the precedence level if it gets
385 * empty after the deletion. The lexer never generate the Stoken below. *)
386 let dummy_prod = [ [ Gramext.Stoken ("DUMMY", "") ], dummy_action ] in
387 let mk_level_list first last =
388 let rec aux acc = function
389 | i when i < first -> acc
392 ((Some (level_of i), Some Gramext.NonA, dummy_prod)
399 [ Grammar.Entry.obj (grammars.term: 'a Grammar.Entry.e),
401 mk_level_list min_precedence max_precedence ];
402 (* {{{ Grammar for concrete syntax patterns, notation level 1 *)
404 let level1_pattern = grammars.level1_pattern in
406 GLOBAL: level1_pattern;
409 [ p = l1_pattern; EOI -> fun l -> NotationUtil.boxify (p l) ]
412 [ p = LIST1 l1_simple_pattern ->
413 fun l -> List.map (fun x -> x l) p ]
416 [ s = SYMBOL -> `Symbol s
417 | k = QKEYWORD -> `Keyword k
418 | n = NUMBER -> `Number n
421 sep: [ [ "sep"; sep = literal -> sep ] ];
423 [ "list0"; p = l1_simple_pattern; sep = OPT sep ->
424 fun l -> Ast.List0 (p l, sep)
425 | "list1"; p = l1_simple_pattern; sep = OPT sep ->
426 fun l -> Ast.List1 (p l, sep)
427 | "opt"; p = l1_simple_pattern -> fun l -> Ast.Opt (p l)
430 l1_pattern_variable: [
431 [ "term"; precedence = NUMBER; id = IDENT ->
432 Ast.TermVar (id, Ast.Level (int_of_string precedence))
433 | "number"; id = IDENT -> Ast.NumVar id
434 | "ident"; id = IDENT -> Ast.IdentVar id
439 v = [ IDENT | NUMBER | COLOR | FLOATWITHUNIT ] -> id, v]];
442 v = [ PERCENTAGE ] -> id, v]];
445 [ p1 = SELF; SYMBOL "\\sub "; p2 = SELF ->
446 return_term_of_level loc
447 (fun l -> Ast.Layout (Ast.Sub (p1 l, p2 l)))
448 | p1 = SELF; SYMBOL "\\sup "; p2 = SELF ->
449 return_term_of_level loc
450 (fun l -> Ast.Layout (Ast.Sup (p1 l, p2 l)))
451 | p1 = SELF; SYMBOL "\\below "; p2 = SELF ->
452 return_term_of_level loc
453 (fun l -> Ast.Layout (Ast.Below (p1 l, p2 l)))
454 | p1 = SELF; SYMBOL "\\above "; p2 = SELF ->
455 return_term_of_level loc
456 (fun l -> Ast.Layout (Ast.Above (p1 l, p2 l)))
457 | p1 = SELF; SYMBOL "\\over "; p2 = SELF ->
458 return_term_of_level loc
459 (fun l -> Ast.Layout (Ast.Over (p1 l, p2 l)))
460 | p1 = SELF; SYMBOL "\\atop "; p2 = SELF ->
461 return_term_of_level loc
462 (fun l -> Ast.Layout (Ast.Atop (p1 l, p2 l)))
463 | p1 = SELF; SYMBOL "\\frac "; p2 = SELF ->
464 return_term_of_level loc
465 (fun l -> Ast.Layout (Ast.Frac (p1 l, p2 l)))
466 | SYMBOL "\\infrule "; p1 = SELF; p2 = SELF; p3 = SELF ->
467 return_term_of_level loc
468 (fun l -> Ast.Layout (Ast.InfRule (p1 l, p2 l, p3 l)))
469 | SYMBOL "\\sqrt "; p = SELF ->
470 return_term_of_level loc (fun l -> Ast.Layout (Ast.Sqrt p l))
471 | SYMBOL "\\root "; index = SELF; SYMBOL "\\of "; arg = SELF ->
472 return_term_of_level loc
473 (fun l -> Ast.Layout (Ast.Root (arg l, index l)))
474 | "hbox"; LPAREN; p = l1_pattern; RPAREN ->
475 return_term_of_level loc
476 (fun l -> Ast.Layout (Ast.Box ((Ast.H, false, false), p l)))
477 | "vbox"; LPAREN; p = l1_pattern; RPAREN ->
478 return_term_of_level loc
479 (fun l -> Ast.Layout (Ast.Box ((Ast.V, false, false), p l)))
480 | "hvbox"; LPAREN; p = l1_pattern; RPAREN ->
481 return_term_of_level loc
482 (fun l -> Ast.Layout (Ast.Box ((Ast.HV, false, false), p l)))
483 | "hovbox"; LPAREN; p = l1_pattern; RPAREN ->
484 return_term_of_level loc
485 (fun l -> Ast.Layout (Ast.Box ((Ast.HOV, false, false), p l)))
486 | "break" -> return_term_of_level loc (fun _ -> Ast.Layout Ast.Break)
487 | "mstyle"; m = LIST1 mstyle ; LPAREN; t = l1_pattern; RPAREN ->
488 return_term_of_level loc
490 Ast.Layout (Ast.Mstyle (m, t l)))
491 | "mpadded"; m = LIST1 mpadded ; LPAREN; t = l1_pattern; RPAREN ->
492 return_term_of_level loc
494 Ast.Layout (Ast.Mpadded (m, t l)))
495 | "maction"; m = LIST1 [ LPAREN; l = l1_pattern; RPAREN -> l ] ->
496 return_term_of_level loc
497 (fun l -> Ast.Layout (Ast.Maction (List.map (fun x ->
498 NotationUtil.group (x l)) m)))
499 | LPAREN; p = l1_pattern; RPAREN ->
500 return_term_of_level loc (fun l -> NotationUtil.group (p l))
504 return_term_of_level loc
505 (fun l -> Ast.Variable (Ast.TermVar (i,Ast.Self l)))
506 | m = l1_magic_pattern ->
507 return_term_of_level loc (fun l -> Ast.Magic (m l))
508 | v = l1_pattern_variable ->
509 return_term_of_level loc (fun _ -> Ast.Variable v)
510 | l = literal -> return_term_of_level loc (fun _ -> Ast.Literal l)
516 (* {{{ Grammar for ast magics, notation level 2 *)
518 let level2_meta = grammars.level2_meta in
522 [ "term"; precedence = NUMBER; id = IDENT ->
523 Ast.TermVar (id,Ast.Level (int_of_string precedence))
524 | "number"; id = IDENT -> Ast.NumVar id
525 | "ident"; id = IDENT -> Ast.IdentVar id
526 | "fresh"; id = IDENT -> Ast.FreshVar id
527 | "anonymous" -> Ast.TermVar ("_",Ast.Self 0) (* is the level relevant?*)
528 | id = IDENT -> Ast.TermVar (id,Ast.Self 0)
532 [ "fold"; kind = [ "left" -> `Left | "right" -> `Right ];
533 base = level2_meta; "rec"; id = IDENT; recursive = level2_meta ->
534 Ast.Fold (kind, base, [id], recursive)
535 | "default"; some = level2_meta; none = level2_meta ->
536 Ast.Default (some, none)
537 | "if"; p_test = level2_meta;
538 "then"; p_true = level2_meta;
539 "else"; p_false = level2_meta ->
540 Ast.If (p_test, p_true, p_false)
545 [ magic = l2_magic -> Ast.Magic magic
546 | var = l2_variable -> Ast.Variable var
547 | blob = UNPARSED_AST ->
548 parse_level2_ast grammars (Ulexing.from_utf8_string blob)
554 (* {{{ Grammar for ast patterns, notation level 2 *)
556 let level2_ast = grammars.level2_ast in
557 let term = grammars.term in
558 let let_defs = grammars.let_defs in
559 let ident = grammars.ident in
560 let protected_binder_vars = grammars.protected_binder_vars in
562 GLOBAL: level2_ast term let_defs protected_binder_vars ident;
563 level2_ast: [ [ p = term -> p ] ];
567 | "Type"; SYMBOL "["; n = [ NUMBER| IDENT ]; SYMBOL "]" -> `NType n
568 | "CProp"; SYMBOL "["; n = [ NUMBER| IDENT ]; SYMBOL "]" -> `NCProp n
572 [ SYMBOL "\\subst "; (* to avoid catching frequent "a [1]" cases *)
575 i = IDENT; SYMBOL <:unicode<Assign>> (* ≔ *); t = term -> (i, t)
582 [ s = SYMBOL "_" -> None
583 | p = term -> Some p ]
586 [ SYMBOL "["; substs = LIST0 meta_subst; SYMBOL "]" -> substs ]
588 possibly_typed_name: [
589 [ LPAREN; id = single_arg; SYMBOL ":"; typ = term; RPAREN ->
591 | arg = single_arg -> arg, None
592 | id = PIDENT -> Ast.Ident (id, None), None
593 | SYMBOL "_" -> Ast.Ident ("_", None), None
594 | LPAREN; id = PIDENT; SYMBOL ":"; typ = term; RPAREN ->
595 Ast.Ident (id, None), Some typ
596 | LPAREN; SYMBOL "_"; SYMBOL ":"; typ = term; RPAREN ->
597 Ast.Ident ("_", None), Some typ
601 [ SYMBOL "_" -> Ast.Wildcard
602 | id = IDENT -> Ast.Pattern (id, None, [])
603 | LPAREN; id = IDENT; vars = LIST1 possibly_typed_name; RPAREN ->
604 Ast.Pattern (id, None, vars)
605 | id = IDENT; vars = LIST1 possibly_typed_name ->
606 Ast.Pattern (id, None, vars)
610 [ SYMBOL <:unicode<Pi>> (* Π *) -> `Pi
611 | SYMBOL <:unicode<forall>> (* ∀ *) -> `Forall
612 | SYMBOL <:unicode<lambda>> (* λ *) -> `Lambda
616 [ LPAREN; names = LIST1 IDENT SEP SYMBOL ",";
617 SYMBOL ":"; ty = term; RPAREN ->
618 List.map (fun n -> Ast.Ident (n, None)) names, Some ty
619 | name = IDENT -> [Ast.Ident (name, None)], None
620 | blob = UNPARSED_META ->
621 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
623 | Ast.Variable (Ast.FreshVar _) -> [meta], None
624 | Ast.Variable (Ast.TermVar ("_",_)) -> [Ast.Ident ("_", None)], None
625 | _ -> failwith "Invalid bound name."
629 [ name = IDENT -> Ast.Ident (name, None)
630 | blob = UNPARSED_META ->
631 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
633 | Ast.Variable (Ast.FreshVar _)
634 | Ast.Variable (Ast.IdentVar _) -> meta
635 | Ast.Variable (Ast.TermVar ("_",_)) -> Ast.Ident ("_", None)
636 | _ -> failwith "Invalid index name."
640 [ name = IDENT -> Env.Ident name
641 | blob = UNPARSED_META ->
642 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
644 | Ast.Variable (Ast.FreshVar _) ->
645 (* it makes sense: extend Env.ident_or_var *)
647 | Ast.Variable (Ast.IdentVar name) -> Env.Var name
648 | Ast.Variable (Ast.TermVar ("_",_)) -> Env.Var "_"
649 | _ -> failwith ("Invalid index name: " ^ blob)
656 index_name = OPT [ "on"; id = single_arg -> id ];
657 ty = OPT [ SYMBOL ":" ; p = term -> p ];
658 SYMBOL <:unicode<def>> (* ≝ *); body = term ->
659 let rec position_of name p = function
661 | n :: _ when n = name -> Some p, p
662 | _ :: tl -> position_of name (p + 1) tl
664 let rec find_arg name n = function
666 (* CSC: new NCicPp.status is the best I can do here
667 without changing the return type *)
668 Ast.fail loc (sprintf "Argument %s not found"
669 (NotationPp.pp_term (new NCicPp.status) name))
671 (match position_of name 0 l with
672 | None, len -> find_arg name (n + len) tl
673 | Some where, len -> n + where)
676 match index_name with
678 | Some index_name -> find_arg index_name 0 args
683 (function (names,ty) -> List.map (function x -> x,ty) names
686 args, (name, ty), body, index
693 [ l = LIST1 single_arg SEP SYMBOL "," -> l
694 | l = LIST1 [ PIDENT | SYMBOL "_" ] SEP SYMBOL "," ->
695 List.map (fun x -> Ast.Ident(x,None)) l
697 typ = OPT [ SYMBOL ":"; t = term -> t ] -> (vars, typ)
700 protected_binder_vars: [
701 [ LPAREN; vars = binder_vars; RPAREN -> vars
704 maybe_protected_binder_vars: [
705 [ vars = binder_vars -> vars
706 | vars = protected_binder_vars -> vars
713 [ LPAREN; id = single_arg; SYMBOL ":"; typ = term; RPAREN ->
715 | id = IDENT; ty = OPT [ SYMBOL ":"; typ = term -> typ] ->
716 Ast.Ident(id,None), ty ];
717 SYMBOL <:unicode<def>> (* ≝ *);
718 p1 = term; "in"; p2 = term ->
719 return_term loc (Ast.LetIn (var, p1, p2))
720 | LETCOREC; defs = let_defs; "in";
722 return_term loc (Ast.LetRec (`CoInductive, defs, body))
723 | LETREC; defs = let_defs; "in";
725 return_term loc (Ast.LetRec (`Inductive, defs, body))
730 [ b = binder; (vars, typ) = maybe_protected_binder_vars; SYMBOL "."; body = term LEVEL "19" ->
731 return_term loc (fold_cluster b vars typ body)
736 [ p1 = term; p2 = term LEVEL "71" ->
737 let rec aux = function
738 | Ast.Appl (hd :: tl)
739 | Ast.AttributedTerm (_, Ast.Appl (hd :: tl)) ->
743 return_term loc (Ast.Appl (aux p1 @ [p2]))
748 [ id = IDENT -> return_term loc (Ast.Ident (id, None))
749 | id = IDENT; s = explicit_subst ->
750 return_term loc (Ast.Ident (id, Some s))
751 | s = CSYMBOL -> return_term loc (Ast.Symbol (s, 0))
752 | u = URI -> return_term loc (Ast.Uri (u, None))
753 | r = NREF -> return_term loc (Ast.NRef (NReference.reference_of_string r))
754 | n = NUMBER -> return_term loc (Ast.Num (n, 0))
755 | IMPLICIT -> return_term loc (Ast.Implicit `JustOne)
756 | SYMBOL <:unicode<ldots>> -> return_term loc (Ast.Implicit `Vector)
757 | PLACEHOLDER -> return_term loc Ast.UserInput
758 | m = META -> return_term loc (Ast.Meta (int_of_string m, []))
759 | m = META; s = meta_substs ->
760 return_term loc (Ast.Meta (int_of_string m, s))
761 | s = sort -> return_term loc (Ast.Sort s)
763 indty_ident = OPT [ "in"; id = IDENT -> id, None ];
764 outtyp = OPT [ "return"; ty = term -> ty ];
767 lhs = match_pattern; SYMBOL <:unicode<Rightarrow>> (* ⇒ *);
772 return_term loc (Ast.Case (t, indty_ident, outtyp, patterns))
773 | LPAREN; p1 = term; SYMBOL ":"; p2 = term; RPAREN ->
774 return_term loc (Ast.Cast (p1, p2))
775 | LPAREN; p = term; RPAREN -> p
776 | blob = UNPARSED_META ->
777 parse_level2_meta grammars (Ulexing.from_utf8_string blob)
786 let initial_grammars keywords =
787 let lexers = CicNotationLexer.mk_lexers keywords in
788 let level1_pattern_grammar =
789 Grammar.gcreate lexers.CicNotationLexer.level1_pattern_lexer in
790 let level2_ast_grammar =
791 Grammar.gcreate lexers.CicNotationLexer.level2_ast_lexer in
792 let level2_meta_grammar =
793 Grammar.gcreate lexers.CicNotationLexer.level2_meta_lexer in
795 Grammar.Entry.create level1_pattern_grammar "level1_pattern" in
796 let level2_ast = Grammar.Entry.create level2_ast_grammar "level2_ast" in
797 let term = Grammar.Entry.create level2_ast_grammar "term" in
798 let ident = Grammar.Entry.create level2_ast_grammar "ident" in
799 let let_defs = Grammar.Entry.create level2_ast_grammar "let_defs" in
800 let protected_binder_vars =
801 Grammar.Entry.create level2_ast_grammar "protected_binder_vars" in
802 let level2_meta = Grammar.Entry.create level2_meta_grammar "level2_meta" in
803 initialize_grammars { level1_pattern=level1_pattern;
804 level2_ast=level2_ast;
808 protected_binder_vars=protected_binder_vars;
809 level2_meta=level2_meta;
810 level2_ast_grammar=level2_ast_grammar;
814 class type g_status =
816 method notation_parser_db: db
819 class status0 ~keywords:kwds =
821 val db = { grammars = initial_grammars kwds; keywords = kwds; items = [] }
822 method notation_parser_db = db
823 method set_notation_parser_db v = {< db = v >}
824 method set_notation_parser_status
825 : 'status. #g_status as 'status -> 'self
826 = fun o -> {< db = o#notation_parser_db >}
829 class virtual status ~keywords:kwds =
835 let extend (status : #status) (CL1P (level1_pattern,precedence)) action =
836 (* move inside constructor XXX *)
837 let add1item status (level, level1_pattern, action) =
838 let p_bindings, p_atoms =
839 List.split (extract_term_production status level1_pattern) in
842 (status#notation_parser_db.grammars.term : 'a Grammar.Entry.e),
843 Some (Gramext.Level level),
845 Some (*Gramext.NonA*) Gramext.NonA,
848 (fun (env: NotationEnv.t) (loc: Ast.location) ->
854 let level = level_of precedence in
855 level, level1_pattern, action in
856 let keywords = NotationUtil.keywords_of_term level1_pattern @
857 status#notation_parser_db.keywords in
858 let items = current_item :: status#notation_parser_db.items in
859 let status = status#set_notation_parser_status (new status0 ~keywords) in
860 let status = status#set_notation_parser_db
861 {status#notation_parser_db with items = items} in
862 List.fold_left add1item status items
866 let parse_level1_pattern status =
867 parse_level1_pattern status#notation_parser_db.grammars
868 let parse_level2_ast status =
869 parse_level2_ast status#notation_parser_db.grammars
870 let parse_level2_meta status =
871 parse_level2_meta status#notation_parser_db.grammars
873 let level2_ast_grammar status =
874 status#notation_parser_db.grammars.level2_ast_grammar
875 let term status = status#notation_parser_db.grammars.term
876 let let_defs status = status#notation_parser_db.grammars.let_defs
877 let protected_binder_vars status =
878 status#notation_parser_db.grammars.protected_binder_vars
882 let print_l2_pattern status =
883 Grammar.print_entry Format.std_formatter
884 (Grammar.Entry.obj status#notation_parser_db.grammars.term);
885 Format.pp_print_flush Format.std_formatter ();
888 (* vim:set encoding=utf8 foldmethod=marker: *)