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 let_codefs: 'c Grammar.Entry.e;
47 protected_binder_vars: 'd Grammar.Entry.e;
48 level2_meta: 'b Grammar.Entry.e;
51 type checked_l1_pattern = CL1P of NotationPt.term * int
53 let refresh_uri_in_checked_l1_pattern ~refresh_uri_in_term
54 ~refresh_uri_in_reference (CL1P (t,n))
56 CL1P (NotationUtil.refresh_uri_in_term ~refresh_uri_in_term
57 ~refresh_uri_in_reference t, n)
61 | Binding of string * Env.value_type
62 | Env of (string * Env.value_type) list
66 (int -> NotationPt.term,
68 (Ast.term Ast.capture_variable list *
69 Ast.term Ast.capture_variable * Ast.term * int) list,
70 Ast.term list * Ast.term option, Env.ident_or_var) grammars;
71 keywords: string list;
72 items: (string * Ast.term * (NotationEnv.t -> Ast.location -> Ast.term)) list
77 Pervasives.int_of_string s
79 failwith (sprintf "Lexer failure: string_of_int \"%s\" failed" s)
81 (** {2 Grammar extension} *)
83 let level_of precedence =
84 if precedence < min_precedence || precedence > max_precedence then
85 raise (Level_not_found precedence);
86 string_of_int precedence
88 let gram_symbol s = Gramext.Stoken ("SYMBOL", s)
89 let gram_ident status =
90 Gramext.Snterm (Grammar.Entry.obj
91 (status#notation_parser_db.grammars.ident : 'a Grammar.Entry.e))
92 (*Gramext.Stoken ("IDENT", s)*)
93 let gram_number s = Gramext.Stoken ("NUMBER", s)
94 let gram_keyword s = Gramext.Stoken ("", s)
95 let gram_term status = function
96 | Ast.Self _ -> Gramext.Sself
97 | Ast.Level precedence ->
100 (status#notation_parser_db.grammars.term : 'a Grammar.Entry.e),
104 let gram_of_literal =
106 | `Symbol s -> gram_symbol s
107 | `Keyword s -> gram_keyword s
108 | `Number s -> gram_number s
110 let make_action action bindings =
111 let rec aux (vl : NotationEnv.t) =
113 [] -> Gramext.action (fun (loc: Ast.location) -> action vl loc)
114 | NoBinding :: tl -> Gramext.action (fun _ -> aux vl tl)
115 (* LUCA: DEFCON 3 BEGIN *)
116 | Binding (name, Env.TermType l) :: tl ->
119 aux ((name, (Env.TermType l, Env.TermValue v))::vl) tl)
120 | Binding (name, Env.StringType) :: tl ->
122 (fun (v:Env.ident_or_var) ->
123 aux ((name, (Env.StringType, Env.StringValue v)) :: vl) tl)
124 | Binding (name, Env.NumType) :: tl ->
127 aux ((name, (Env.NumType, Env.NumValue v)) :: vl) tl)
128 | Binding (name, Env.OptType t) :: tl ->
130 (fun (v:'a option) ->
131 aux ((name, (Env.OptType t, Env.OptValue v)) :: vl) tl)
132 | Binding (name, Env.ListType t) :: tl ->
135 aux ((name, (Env.ListType t, Env.ListValue v)) :: vl) tl)
137 Gramext.action (fun (v:NotationEnv.t) -> aux (v @ vl) tl)
138 (* LUCA: DEFCON 3 END *)
140 aux [] (List.rev bindings)
146 | NoBinding :: tl -> aux acc tl
147 | Env names :: tl -> aux (List.rev names @ acc) tl
148 | Binding (name, ty) :: tl -> aux ((name, ty) :: acc) tl
152 (* given a level 1 pattern computes the new RHS of "term" grammar entry *)
153 let extract_term_production status pattern =
154 let rec aux = function
155 | Ast.AttributedTerm (_, t) -> aux t
156 | Ast.Literal l -> aux_literal l
157 | Ast.Layout l -> aux_layout l
158 | Ast.Magic m -> aux_magic m
159 | Ast.Variable v -> aux_variable v
161 prerr_endline (NotationPp.pp_term status t);
165 | `Symbol s -> [NoBinding, gram_symbol s]
167 (* assumption: s will be registered as a keyword with the lexer *)
168 [NoBinding, gram_keyword s]
169 | `Number s -> [NoBinding, gram_number s]
170 and aux_layout = function
171 | Ast.Sub (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\sub "] @ aux p2
172 | Ast.Sup (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\sup "] @ aux p2
173 | Ast.Below (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\below "] @ aux p2
174 | Ast.Above (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\above "] @ aux p2
175 | Ast.Frac (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\frac "] @ aux p2
176 | Ast.InfRule (p1, p2, p3) -> [NoBinding, gram_symbol "\\infrule "] @ aux p1 @ aux p2 @ aux p3
177 | Ast.Atop (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\atop "] @ aux p2
178 | Ast.Over (p1, p2) -> aux p1 @ [NoBinding, gram_symbol "\\over "] @ aux p2
179 | Ast.Root (p1, p2) ->
180 [NoBinding, gram_symbol "\\root "] @ aux p2
181 @ [NoBinding, gram_symbol "\\of "] @ aux p1
182 | Ast.Sqrt p -> [NoBinding, gram_symbol "\\sqrt "] @ aux p
184 | Ast.Box (_, pl) -> List.flatten (List.map aux pl)
185 | Ast.Group pl -> List.flatten (List.map aux pl)
186 | Ast.Mstyle (_,pl) -> List.flatten (List.map aux pl)
187 | Ast.Mpadded (_,pl) -> List.flatten (List.map aux pl)
188 | Ast.Maction l -> List.flatten (List.map aux l)
189 and aux_magic magic =
192 let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
193 let action (env_opt : NotationEnv.t option) (loc : Ast.location) =
195 | Some env -> List.map Env.opt_binding_some env
196 | None -> List.map Env.opt_binding_of_name p_names
198 [ Env (List.map Env.opt_declaration p_names),
200 [ [ Gramext.Sopt (Gramext.srules [ p_atoms, p_action ]) ],
201 Gramext.action action ] ]
203 | Ast.List1 (p, _) ->
204 let p_bindings, p_atoms, p_names, p_action = inner_pattern p in
205 let action (env_list : NotationEnv.t list) (loc : Ast.location) =
206 NotationEnv.coalesce_env p_names env_list
210 | Ast.List0 (_, None) -> Gramext.Slist0 s
211 | Ast.List1 (_, None) -> Gramext.Slist1 s
212 | Ast.List0 (_, Some l) -> Gramext.Slist0sep (s, gram_of_literal l, false)
213 | Ast.List1 (_, Some l) -> Gramext.Slist1sep (s, gram_of_literal l, false)
216 [ Env (List.map Env.list_declaration p_names),
218 [ [ gram_of_list (Gramext.srules [ p_atoms, p_action ]) ],
219 Gramext.action action ] ]
223 | Ast.NumVar s -> [Binding (s, Env.NumType), gram_number ""]
224 | Ast.TermVar (s,(Ast.Self level|Ast.Level level as lv)) ->
225 [Binding (s, Env.TermType level), gram_term status lv]
226 | Ast.IdentVar s -> [Binding (s, Env.StringType), gram_ident status]
227 | Ast.Ascription (p, s) -> assert false (* TODO *)
228 | Ast.FreshVar _ -> assert false
229 and inner_pattern p =
230 let p_bindings, p_atoms = List.split (aux p) in
231 let p_names = flatten_opt p_bindings in
233 make_action (fun (env : NotationEnv.t) (loc : Ast.location) -> env)
236 p_bindings, p_atoms, p_names, action
240 type rule_id = Grammar.token Gramext.g_symbol list
242 let compare_rule_id x y =
243 let rec aux = function
247 | ((s1::tl1) as x),((s2::tl2) as y) ->
248 if Gramext.eq_symbol s1 s2 then aux (tl1,tl2)
249 else Pervasives.compare x y
254 let check_l1_pattern level1_pattern pponly level associativity =
255 let variables = ref 0 in
256 let symbols = ref 0 in
257 let rec aux = function
258 | Ast.AttributedTerm (att, t) -> Ast.AttributedTerm (att,aux t)
259 | Ast.Literal _ as l -> incr symbols; l
260 | Ast.Layout l -> Ast.Layout (aux_layout l)
261 | Ast.Magic m -> Ast.Magic (aux_magic m)
262 | Ast.Variable v -> (aux_variable v)
264 and aux_layout = function
265 | Ast.Sub (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Sub (p1, p2)
266 | Ast.Sup (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Sup (p1, p2)
267 | Ast.Below (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Below (p1, p2)
268 | Ast.Above (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Above (p1, p2)
269 | Ast.Frac (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Frac (p1, p2)
270 | 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)
271 | Ast.Atop (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Atop (p1, p2)
272 | Ast.Over (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Over (p1, p2)
273 | Ast.Root (p1, p2) -> let p1 = aux p1 in let p2 = aux p2 in Ast.Root (p1, p2)
274 | Ast.Sqrt p -> Ast.Sqrt (aux p)
275 | Ast.Break as t -> t
276 | Ast.Box (b, pl) -> Ast.Box(b, List.map aux pl)
277 | Ast.Group pl -> Ast.Group (List.map aux pl)
278 | Ast.Mstyle (l,pl) -> Ast.Mstyle (l, List.map aux pl)
279 | Ast.Mpadded (l,pl) -> Ast.Mpadded (l, List.map aux pl)
280 | Ast.Maction l as t ->
282 raise(Parse_error("Maction can be used only in output notations"))
284 and aux_magic magic =
286 | Ast.Opt p -> Ast.Opt (aux p)
287 | Ast.List0 (p, x) -> Ast.List0 (aux p, x)
288 | Ast.List1 (p, x) -> Ast.List1 (aux p, x)
292 | Ast.NumVar _ as t -> Ast.Variable t
293 | Ast.TermVar (s,Ast.Self _) when associativity <> Gramext.NonA ->
295 if !variables > 2 then
296 raise (Parse_error ("Exactly 2 variables must be specified in an "^
297 "associative notation"));
298 (match !variables, associativity with
300 Ast.Variable (Ast.TermVar (s, Ast.Self level))
301 | 1,Gramext.RightA ->
302 Ast.Variable (Ast.TermVar (s, Ast.Self (level+1)))
304 Ast.Variable (Ast.TermVar (s, Ast.Self (level+1)))
305 | 2,Gramext.RightA ->
306 Ast.Variable (Ast.TermVar (s, Ast.Level (level-1)))
308 | Ast.TermVar (s,Ast.Level _) when associativity <> Gramext.NonA ->
309 raise (Parse_error ("Variables can not be declared with a " ^
310 "precedence in an associative notation"))
311 (*avoid camlp5 divergence due to non-Sself recursion at the same level *)
312 | Ast.TermVar (s,Ast.Level l) when l<=level && !variables=0 && !symbols=0->
313 raise(Parse_error("Left recursive rule with precedence not greater " ^
314 "than " ^ string_of_int level ^ " is not allowed to avoid divergence"))
315 | Ast.TermVar _ as t -> incr variables; Ast.Variable t
316 | Ast.IdentVar _ as t -> Ast.Variable t
317 | Ast.Ascription _ -> assert false (* TODO *)
318 | Ast.FreshVar _ -> assert false
320 if associativity <> Gramext.NonA && level = min_precedence then
321 raise (Parse_error ("You can not specify an associative notation " ^
322 "at level "^string_of_int min_precedence ^ "; increase it"));
323 let cp = aux level1_pattern in
324 (* prerr_endline ("checked_pattern: " ^ NotationPp.pp_term cp); *)
325 if !variables <> 2 && associativity <> Gramext.NonA then
326 raise (Parse_error ("Exactly 2 variables must be specified in an "^
327 "associative notation"));
333 let fold_cluster binder terms ty body =
335 (fun term body -> Ast.Binder (binder, (term, ty), body))
336 terms body (* terms are names: either Ident or FreshVar *)
338 let fold_exists terms ty body =
341 let lambda = Ast.Binder (`Lambda, (term, ty), body) in
342 Ast.Appl [ Ast.Symbol ("exists", 0); lambda ])
345 let fold_binder binder pt_names body =
347 (fun (names, ty) body -> fold_cluster binder names ty body)
350 let return_term loc term = Ast.AttributedTerm (`Loc loc, term)
351 let return_term_of_level loc term l =
352 Ast.AttributedTerm (`Loc loc, term l)
354 (** {2 API implementation} *)
356 let exc_located_wrapper f =
360 | Ploc.Exc (floc, Stream.Error msg) ->
361 raise (HExtlib.Localized (floc, Parse_error msg))
362 | Ploc.Exc (floc, HExtlib.Localized (_,exn)) ->
363 raise (HExtlib.Localized (floc, (Parse_error (Printexc.to_string exn))))
364 | Ploc.Exc (floc, exn) ->
365 raise (HExtlib.Localized (floc, (Parse_error (Printexc.to_string exn))))
367 let parse_level1_pattern grammars precedence lexbuf =
369 (fun () -> Grammar.Entry.parse grammars.level1_pattern (Obj.magic lexbuf) precedence)
371 let parse_level2_ast grammars lexbuf =
373 (fun () -> Grammar.Entry.parse grammars.level2_ast (Obj.magic lexbuf))
375 let parse_level2_meta grammars lexbuf =
377 (fun () -> Grammar.Entry.parse grammars.level2_meta (Obj.magic lexbuf))
379 (* create empty precedence level for "term" *)
380 let initialize_grammars grammars =
382 Gramext.action (fun _ ->
383 failwith "internal error, lexer generated a dummy token")
385 (* Needed since campl4 on "delete_rule" remove the precedence level if it gets
386 * empty after the deletion. The lexer never generate the Stoken below. *)
387 let dummy_prod = [ [ Gramext.Stoken ("DUMMY", "") ], dummy_action ] in
388 let mk_level_list first last =
389 let rec aux acc = function
390 | i when i < first -> acc
393 ((Some (level_of i), Some Gramext.NonA, dummy_prod)
400 [ Grammar.Entry.obj (grammars.term: 'a Grammar.Entry.e),
402 mk_level_list min_precedence max_precedence ];
403 (* {{{ Grammar for concrete syntax patterns, notation level 1 *)
405 let level1_pattern = grammars.level1_pattern in
407 GLOBAL: level1_pattern;
410 [ p = l1_pattern; EOI -> fun l -> NotationUtil.boxify (p l) ]
413 [ p = LIST1 l1_simple_pattern ->
414 fun l -> List.map (fun x -> x l) p ]
417 [ s = SYMBOL -> `Symbol s
418 | k = QKEYWORD -> `Keyword k
419 | n = NUMBER -> `Number n
422 sep: [ [ "sep"; sep = literal -> sep ] ];
424 [ "list0"; p = l1_simple_pattern; sep = OPT sep ->
425 fun l -> Ast.List0 (p l, sep)
426 | "list1"; p = l1_simple_pattern; sep = OPT sep ->
427 fun l -> Ast.List1 (p l, sep)
428 | "opt"; p = l1_simple_pattern -> fun l -> Ast.Opt (p l)
431 l1_pattern_variable: [
432 [ "term"; precedence = NUMBER; id = IDENT ->
433 Ast.TermVar (id, Ast.Level (int_of_string precedence))
434 | "number"; id = IDENT -> Ast.NumVar id
435 | "ident"; id = IDENT -> Ast.IdentVar id
440 v = [ IDENT | NUMBER | COLOR | FLOATWITHUNIT ] -> id, v]];
443 v = [ PERCENTAGE ] -> id, v]];
446 [ p1 = SELF; SYMBOL "\\sub "; p2 = SELF ->
447 return_term_of_level loc
448 (fun l -> Ast.Layout (Ast.Sub (p1 l, p2 l)))
449 | p1 = SELF; SYMBOL "\\sup "; p2 = SELF ->
450 return_term_of_level loc
451 (fun l -> Ast.Layout (Ast.Sup (p1 l, p2 l)))
452 | p1 = SELF; SYMBOL "\\below "; p2 = SELF ->
453 return_term_of_level loc
454 (fun l -> Ast.Layout (Ast.Below (p1 l, p2 l)))
455 | p1 = SELF; SYMBOL "\\above "; p2 = SELF ->
456 return_term_of_level loc
457 (fun l -> Ast.Layout (Ast.Above (p1 l, p2 l)))
458 | p1 = SELF; SYMBOL "\\over "; p2 = SELF ->
459 return_term_of_level loc
460 (fun l -> Ast.Layout (Ast.Over (p1 l, p2 l)))
461 | p1 = SELF; SYMBOL "\\atop "; p2 = SELF ->
462 return_term_of_level loc
463 (fun l -> Ast.Layout (Ast.Atop (p1 l, p2 l)))
464 | p1 = SELF; SYMBOL "\\frac "; p2 = SELF ->
465 return_term_of_level loc
466 (fun l -> Ast.Layout (Ast.Frac (p1 l, p2 l)))
467 | SYMBOL "\\infrule "; p1 = SELF; p2 = SELF; p3 = SELF ->
468 return_term_of_level loc
469 (fun l -> Ast.Layout (Ast.InfRule (p1 l, p2 l, p3 l)))
470 | SYMBOL "\\sqrt "; p = SELF ->
471 return_term_of_level loc (fun l -> Ast.Layout (Ast.Sqrt p l))
472 | SYMBOL "\\root "; index = SELF; SYMBOL "\\of "; arg = SELF ->
473 return_term_of_level loc
474 (fun l -> Ast.Layout (Ast.Root (arg l, index l)))
475 | "hbox"; LPAREN; p = l1_pattern; RPAREN ->
476 return_term_of_level loc
477 (fun l -> Ast.Layout (Ast.Box ((Ast.H, false, false), p l)))
478 | "vbox"; LPAREN; p = l1_pattern; RPAREN ->
479 return_term_of_level loc
480 (fun l -> Ast.Layout (Ast.Box ((Ast.V, false, false), p l)))
481 | "hvbox"; LPAREN; p = l1_pattern; RPAREN ->
482 return_term_of_level loc
483 (fun l -> Ast.Layout (Ast.Box ((Ast.HV, false, false), p l)))
484 | "hovbox"; LPAREN; p = l1_pattern; RPAREN ->
485 return_term_of_level loc
486 (fun l -> Ast.Layout (Ast.Box ((Ast.HOV, false, false), p l)))
487 | "break" -> return_term_of_level loc (fun _ -> Ast.Layout Ast.Break)
488 | "mstyle"; m = LIST1 mstyle ; LPAREN; t = l1_pattern; RPAREN ->
489 return_term_of_level loc
491 Ast.Layout (Ast.Mstyle (m, t l)))
492 | "mpadded"; m = LIST1 mpadded ; LPAREN; t = l1_pattern; RPAREN ->
493 return_term_of_level loc
495 Ast.Layout (Ast.Mpadded (m, t l)))
496 | "maction"; m = LIST1 [ LPAREN; l = l1_pattern; RPAREN -> l ] ->
497 return_term_of_level loc
498 (fun l -> Ast.Layout (Ast.Maction (List.map (fun x ->
499 NotationUtil.group (x l)) m)))
500 | LPAREN; p = l1_pattern; RPAREN ->
501 return_term_of_level loc (fun l -> NotationUtil.group (p l))
505 return_term_of_level loc
506 (fun l -> Ast.Variable (Ast.TermVar (i,Ast.Self l)))
507 | m = l1_magic_pattern ->
508 return_term_of_level loc (fun l -> Ast.Magic (m l))
509 | v = l1_pattern_variable ->
510 return_term_of_level loc (fun _ -> Ast.Variable v)
511 | l = literal -> return_term_of_level loc (fun _ -> Ast.Literal l)
517 (* {{{ Grammar for ast magics, notation level 2 *)
519 let level2_meta = grammars.level2_meta in
523 [ "term"; precedence = NUMBER; id = IDENT ->
524 Ast.TermVar (id,Ast.Level (int_of_string precedence))
525 | "number"; id = IDENT -> Ast.NumVar id
526 | "ident"; id = IDENT -> Ast.IdentVar id
527 | "fresh"; id = IDENT -> Ast.FreshVar id
528 | "anonymous" -> Ast.TermVar ("_",Ast.Self 0) (* is the level relevant?*)
529 | id = IDENT -> Ast.TermVar (id,Ast.Self 0)
533 [ "fold"; kind = [ "left" -> `Left | "right" -> `Right ];
534 base = level2_meta; "rec"; id = IDENT; recursive = level2_meta ->
535 Ast.Fold (kind, base, [id], recursive)
536 | "default"; some = level2_meta; none = level2_meta ->
537 Ast.Default (some, none)
538 | "if"; p_test = level2_meta;
539 "then"; p_true = level2_meta;
540 "else"; p_false = level2_meta ->
541 Ast.If (p_test, p_true, p_false)
546 [ magic = l2_magic -> Ast.Magic magic
547 | var = l2_variable -> Ast.Variable var
548 | blob = UNPARSED_AST ->
549 parse_level2_ast grammars (Ulexing.from_utf8_string blob)
555 (* {{{ Grammar for ast patterns, notation level 2 *)
557 let level2_ast = grammars.level2_ast in
558 let term = grammars.term in
559 let let_defs = grammars.let_defs in
560 let let_codefs = grammars.let_codefs in
561 let ident = grammars.ident in
562 let protected_binder_vars = grammars.protected_binder_vars in
564 GLOBAL: level2_ast term let_defs let_codefs protected_binder_vars ident;
565 level2_ast: [ [ p = term -> p ] ];
569 | "Type"; SYMBOL "["; n = [ NUMBER| IDENT ]; SYMBOL "]" -> `NType n
570 | "CProp"; SYMBOL "["; n = [ NUMBER| IDENT ]; SYMBOL "]" -> `NCProp n
574 [ SYMBOL "\\subst "; (* to avoid catching frequent "a [1]" cases *)
577 i = IDENT; SYMBOL <:unicode<Assign>> (* ≔ *); t = term -> (i, t)
584 [ s = SYMBOL "_" -> None
585 | p = term -> Some p ]
588 [ SYMBOL "["; substs = LIST0 meta_subst; SYMBOL "]" -> substs ]
590 possibly_typed_name: [
591 [ LPAREN; id = single_arg; SYMBOL ":"; typ = term; RPAREN ->
593 | arg = single_arg -> arg, None
594 | id = PIDENT -> Ast.Ident (id, None), None
595 | SYMBOL "_" -> Ast.Ident ("_", None), None
596 | LPAREN; id = PIDENT; SYMBOL ":"; typ = term; RPAREN ->
597 Ast.Ident (id, None), Some typ
598 | LPAREN; SYMBOL "_"; SYMBOL ":"; typ = term; RPAREN ->
599 Ast.Ident ("_", None), Some typ
603 [ SYMBOL "_" -> Ast.Wildcard
604 | id = IDENT -> Ast.Pattern (id, None, [])
605 | LPAREN; id = IDENT; vars = LIST1 possibly_typed_name; RPAREN ->
606 Ast.Pattern (id, None, vars)
607 | id = IDENT; vars = LIST1 possibly_typed_name ->
608 Ast.Pattern (id, None, vars)
612 [ SYMBOL <:unicode<Pi>> (* Π *) -> `Pi
613 | SYMBOL <:unicode<forall>> (* ∀ *) -> `Forall
614 | SYMBOL <:unicode<lambda>> (* λ *) -> `Lambda
618 [ LPAREN; names = LIST1 IDENT SEP SYMBOL ",";
619 SYMBOL ":"; ty = term; RPAREN ->
620 List.map (fun n -> Ast.Ident (n, None)) names, Some ty
621 | name = IDENT -> [Ast.Ident (name, None)], None
622 | blob = UNPARSED_META ->
623 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
625 | Ast.Variable (Ast.FreshVar _) -> [meta], None
626 | Ast.Variable (Ast.TermVar ("_",_)) -> [Ast.Ident ("_", None)], None
627 | _ -> failwith "Invalid bound name."
631 [ name = IDENT -> Ast.Ident (name, None)
632 | blob = UNPARSED_META ->
633 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
635 | Ast.Variable (Ast.FreshVar _)
636 | Ast.Variable (Ast.IdentVar _) -> meta
637 | Ast.Variable (Ast.TermVar ("_",_)) -> Ast.Ident ("_", None)
638 | _ -> failwith "Invalid index name."
642 [ name = IDENT -> Env.Ident name
643 | blob = UNPARSED_META ->
644 let meta = parse_level2_meta grammars (Ulexing.from_utf8_string blob) in
646 | Ast.Variable (Ast.FreshVar _) ->
647 (* it makes sense: extend Env.ident_or_var *)
649 | Ast.Variable (Ast.IdentVar name) -> Env.Var name
650 | Ast.Variable (Ast.TermVar ("_",_)) -> Env.Var "_"
651 | _ -> failwith ("Invalid index name: " ^ blob)
658 index_name = OPT [ "on"; id = single_arg -> id ];
659 ty = OPT [ SYMBOL ":" ; p = term -> p ];
660 SYMBOL <:unicode<def>> (* ≝ *); body = term ->
661 let rec position_of name p = function
663 | n :: _ when n = name -> Some p, p
664 | _ :: tl -> position_of name (p + 1) tl
666 let rec find_arg name n = function
668 (* CSC: new NCicPp.status is the best I can do here
669 without changing the return type *)
670 Ast.fail loc (sprintf "Argument %s not found"
671 (NotationPp.pp_term (new NCicPp.status) name))
673 (match position_of name 0 l with
674 | None, len -> find_arg name (n + len) tl
675 | Some where, len -> n + where)
678 match index_name with
680 | Some index_name -> find_arg index_name 0 args
685 (function (names,ty) -> List.map (function x -> x,ty) names
688 args, (name, ty), body, index
697 ty = OPT [ SYMBOL ":" ; p = term -> p ];
698 SYMBOL <:unicode<def>> (* ≝ *); body = term ->
702 (function (names,ty) -> List.map (function x -> x,ty) names
705 args, (name, ty), body, 0
712 [ l = LIST1 single_arg SEP SYMBOL "," -> l
713 | l = LIST1 [ PIDENT | SYMBOL "_" ] SEP SYMBOL "," ->
714 List.map (fun x -> Ast.Ident(x,None)) l
716 typ = OPT [ SYMBOL ":"; t = term -> t ] -> (vars, typ)
719 protected_binder_vars: [
720 [ LPAREN; vars = binder_vars; RPAREN -> vars
723 maybe_protected_binder_vars: [
724 [ vars = binder_vars -> vars
725 | vars = protected_binder_vars -> vars
732 [ LPAREN; id = single_arg; SYMBOL ":"; typ = term; RPAREN ->
734 | id = IDENT; ty = OPT [ SYMBOL ":"; typ = term -> typ] ->
735 Ast.Ident(id,None), ty ];
736 SYMBOL <:unicode<def>> (* ≝ *);
737 p1 = term; "in"; p2 = term ->
738 return_term loc (Ast.LetIn (var, p1, p2))
743 [ b = binder; (vars, typ) = maybe_protected_binder_vars; SYMBOL "."; body = term LEVEL "19" ->
744 return_term loc (fold_cluster b vars typ body)
749 [ p1 = term; p2 = term LEVEL "71" ->
750 let rec aux = function
751 | Ast.Appl (hd :: tl)
752 | Ast.AttributedTerm (_, Ast.Appl (hd :: tl)) ->
756 return_term loc (Ast.Appl (aux p1 @ [p2]))
761 [ id = IDENT -> return_term loc (Ast.Ident (id, None))
762 | id = IDENT; s = explicit_subst ->
763 return_term loc (Ast.Ident (id, Some s))
764 | s = CSYMBOL -> return_term loc (Ast.Symbol (s, 0))
765 | u = URI -> return_term loc (Ast.Uri (u, None))
766 | r = NREF -> return_term loc (Ast.NRef (NReference.reference_of_string r))
767 | n = NUMBER -> return_term loc (Ast.Num (n, 0))
768 | IMPLICIT -> return_term loc (Ast.Implicit `JustOne)
769 | SYMBOL <:unicode<ldots>> -> return_term loc (Ast.Implicit `Vector)
770 | PLACEHOLDER -> return_term loc Ast.UserInput
771 | m = META -> return_term loc (Ast.Meta (int_of_string m, []))
772 | m = META; s = meta_substs ->
773 return_term loc (Ast.Meta (int_of_string m, s))
774 | s = sort -> return_term loc (Ast.Sort s)
776 indty_ident = OPT [ "in"; id = IDENT -> id, None ];
777 outtyp = OPT [ "return"; ty = term -> ty ];
780 lhs = match_pattern; SYMBOL <:unicode<Rightarrow>> (* ⇒ *);
785 return_term loc (Ast.Case (t, indty_ident, outtyp, patterns))
786 | LPAREN; p1 = term; SYMBOL ":"; p2 = term; RPAREN ->
787 return_term loc (Ast.Cast (p1, p2))
788 | LPAREN; p = term; RPAREN -> p
789 | blob = UNPARSED_META ->
790 parse_level2_meta grammars (Ulexing.from_utf8_string blob)
799 let initial_grammars keywords =
800 let lexers = CicNotationLexer.mk_lexers keywords in
801 let level1_pattern_grammar =
802 Grammar.gcreate lexers.CicNotationLexer.level1_pattern_lexer in
803 let level2_ast_grammar =
804 Grammar.gcreate lexers.CicNotationLexer.level2_ast_lexer in
805 let level2_meta_grammar =
806 Grammar.gcreate lexers.CicNotationLexer.level2_meta_lexer in
808 Grammar.Entry.create level1_pattern_grammar "level1_pattern" in
809 let level2_ast = Grammar.Entry.create level2_ast_grammar "level2_ast" in
810 let term = Grammar.Entry.create level2_ast_grammar "term" in
811 let ident = Grammar.Entry.create level2_ast_grammar "ident" in
812 let let_defs = Grammar.Entry.create level2_ast_grammar "let_defs" in
813 let let_codefs = Grammar.Entry.create level2_ast_grammar "let_codefs" in
814 let protected_binder_vars =
815 Grammar.Entry.create level2_ast_grammar "protected_binder_vars" in
816 let level2_meta = Grammar.Entry.create level2_meta_grammar "level2_meta" in
817 initialize_grammars { level1_pattern=level1_pattern;
818 level2_ast=level2_ast;
822 let_codefs=let_codefs;
823 protected_binder_vars=protected_binder_vars;
824 level2_meta=level2_meta;
825 level2_ast_grammar=level2_ast_grammar;
829 class type g_status =
831 method notation_parser_db: db
834 class status0 ~keywords:kwds =
836 val db = { grammars = initial_grammars kwds; keywords = kwds; items = [] }
837 method notation_parser_db = db
838 method set_notation_parser_db v = {< db = v >}
839 method set_notation_parser_status
840 : 'status. #g_status as 'status -> 'self
841 = fun o -> {< db = o#notation_parser_db >}
844 class virtual status ~keywords:kwds =
850 let extend (status : #status) (CL1P (level1_pattern,precedence)) action =
851 (* move inside constructor XXX *)
852 let add1item status (level, level1_pattern, action) =
853 let p_bindings, p_atoms =
854 List.split (extract_term_production status level1_pattern) in
857 (status#notation_parser_db.grammars.term : 'a Grammar.Entry.e),
858 Some (Gramext.Level level),
860 Some (*Gramext.NonA*) Gramext.NonA,
863 (fun (env: NotationEnv.t) (loc: Ast.location) ->
869 let level = level_of precedence in
870 level, level1_pattern, action in
871 let keywords = NotationUtil.keywords_of_term level1_pattern @
872 status#notation_parser_db.keywords in
873 let items = current_item :: status#notation_parser_db.items in
874 let status = status#set_notation_parser_status (new status0 ~keywords) in
875 let status = status#set_notation_parser_db
876 {status#notation_parser_db with items = items} in
877 List.fold_left add1item status items
881 let parse_level1_pattern status =
882 parse_level1_pattern status#notation_parser_db.grammars
883 let parse_level2_ast status =
884 parse_level2_ast status#notation_parser_db.grammars
885 let parse_level2_meta status =
886 parse_level2_meta status#notation_parser_db.grammars
888 let level2_ast_grammar status =
889 status#notation_parser_db.grammars.level2_ast_grammar
890 let term status = status#notation_parser_db.grammars.term
891 let let_defs status = status#notation_parser_db.grammars.let_defs
892 let let_codefs status = status#notation_parser_db.grammars.let_codefs
893 let protected_binder_vars status =
894 status#notation_parser_db.grammars.protected_binder_vars
898 let print_l2_pattern status =
899 Grammar.print_entry Format.std_formatter
900 (Grammar.Entry.obj status#notation_parser_db.grammars.term);
901 Format.pp_print_flush Format.std_formatter ();
904 (* vim:set encoding=utf8 foldmethod=marker: *)