1 (* Copyright (C) 2004-2005, 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 = CicNotationPt
31 module Env = CicNotationEnv
34 let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
37 type pretty_printer_id = pattern_id
39 let resolve_binder = function
40 | `Lambda -> "\\lambda"
42 | `Forall -> "\\forall"
43 | `Exists -> "\\exists"
45 let add_level_info prec t = Ast.AttributedTerm (`Level prec, t)
47 let rec top_pos t = add_level_info ~-1 t
49 let rec remove_level_info =
51 | Ast.AttributedTerm (`Level _, t) -> remove_level_info t
52 | Ast.AttributedTerm (a, t) -> Ast.AttributedTerm (a, remove_level_info t)
55 let add_xml_attrs attrs t =
56 if attrs = [] then t else Ast.AttributedTerm (`XmlAttrs attrs, t)
58 let add_keyword_attrs =
59 add_xml_attrs (RenderingAttrs.keyword_attributes `MathML)
61 let box kind spacing indent content =
62 Ast.Layout (Ast.Box ((kind, spacing, indent), content))
66 let hvbox = box Ast.HV
67 let hovbox = box Ast.HOV
68 let break = Ast.Layout Ast.Break
69 let space = Ast.Literal (`Symbol " ")
70 let builtin_symbol s = Ast.Literal (`Symbol s)
71 let keyword k = add_keyword_attrs (Ast.Literal (`Keyword k))
74 add_xml_attrs (RenderingAttrs.number_attributes `MathML)
75 (Ast.Literal (`Number s))
78 add_xml_attrs (RenderingAttrs.ident_attributes `MathML) (Ast.Ident (i, None))
80 let ident_w_href href i =
84 let href = UriManager.string_of_uri href in
85 add_xml_attrs [Some "xlink", "href", href] (ident i)
88 add_xml_attrs (RenderingAttrs.builtin_symbol_attributes `MathML)
91 let string_of_sort_kind = function
96 | `NType s -> "Type[" ^ s ^ "]"
97 | `NCProp s -> "CProp[" ^ s ^ "]"
101 ~sep:[space] (List.map (fun x -> [f x]) l)
108 let rec aux_args level =
112 [ Ast.AttributedTerm (`Level level,k last) ]
114 (Ast.AttributedTerm (`Level level, k hd)) :: aux_args 71 tl
116 add_level_info Ast.apply_prec
117 (hovbox true true (CicNotationUtil.dress break (aux_args 70 ts)))
118 | Ast.Binder (binder_kind, (id, ty), body) ->
119 add_level_info Ast.binder_prec
121 [ binder_symbol (resolve_binder binder_kind);
122 k id; builtin_symbol ":"; aux_ty ty; break;
123 builtin_symbol "."; k body ])
124 | Ast.Case (what, indty_opt, outty_opt, patterns) ->
129 [ space; keyword "return"; space; break; remove_level_info (k outty)]
134 | Some (indty, href) -> [ space; keyword "in"; space; break; ident_w_href href indty ]
139 hvbox false true [keyword "match"; space; break; top_pos (k what)];
141 hvbox false true indty_box;
143 hvbox false true outty_box
151 let mk_case_pattern =
153 Ast.Pattern (head, href, vars) ->
154 hvbox true true (ident_w_href href head ::
155 List.flatten (List.map (fun x -> [break;x]) (map_space aux_var vars)))
156 | Ast.Wildcard -> builtin_symbol "_"
163 mk_case_pattern lhs; break; builtin_symbol "\\Rightarrow";
164 break; top_pos (k rhs) ]))
168 let rec aux_patterns = function
174 last; builtin_symbol "]" ] ]
176 [ break; hbox false false [ builtin_symbol "|"; hd ] ]
181 [ hbox false false [ builtin_symbol "["; builtin_symbol "]" ] ]
184 builtin_symbol "["; one; builtin_symbol "]" ] ]
186 hbox false false [ builtin_symbol "["; hd ]
189 add_level_info Ast.simple_prec
191 hvbox false false ([match_box]); break;
192 hbox false false [ hvbox false false patterns'' ] ])
193 | Ast.Cast (bo, ty) ->
194 add_level_info Ast.simple_prec
196 builtin_symbol "("; top_pos (k bo); break; builtin_symbol ":";
197 top_pos (k ty); builtin_symbol ")"])
198 | Ast.LetIn (var, s, t) ->
199 add_level_info Ast.let_in_prec
202 keyword "let"; space;
205 builtin_symbol "\\def"; break; top_pos (k s) ];
206 break; space; keyword "in"; space ];
209 | Ast.LetRec (rec_kind, funs, where) ->
211 match rec_kind with `Inductive -> "rec" | `CoInductive -> "corec"
213 let mk_fun (args, (name,ty), body, rec_param) =
214 List.flatten (List.map (fun x -> [aux_var x; space]) args),
215 k name, HExtlib.map_option k ty, k body, fst (List.nth args rec_param)
217 let mk_funs = List.map mk_fun in
218 let fst_fun, tl_funs =
219 match mk_funs funs with hd :: tl -> hd, tl | [] -> assert false
222 let (params, name, ty, body, rec_param) = fst_fun in
231 [keyword "on" ; space ; rec_param ;space ] @
232 (match ty with None -> [] | Some ty -> [builtin_symbol ":"; ty]) @
233 [ builtin_symbol "\\def";
239 (fun (params, name, ty, body, rec_param) ->
242 keyword "and"; space;
245 [space; keyword "on" ; space; rec_param ;space ] @
248 | Some ty -> [builtin_symbol ":"; ty]) @
249 [ builtin_symbol "\\def"; break; body ])])
252 add_level_info Ast.let_in_prec
254 (fst_row :: List.flatten tl_rows
255 @ [ break; keyword "in"; break; k where ])))
256 | Ast.Implicit -> builtin_symbol "?"
258 let local_context l =
259 List.map (function None -> None | Some t -> Some (k t)) l
261 Ast.Meta(n, local_context l)
262 | Ast.Sort sort -> aux_sort sort
265 | Ast.Ident (_, None) | Ast.Ident (_, Some [])
266 | Ast.Uri (_, None) | Ast.Uri (_, Some [])
268 | Ast.UserInput as leaf -> leaf
269 | t -> CicNotationUtil.visit_ast ~special_k k t
270 and aux_sort sort_kind =
271 add_xml_attrs (RenderingAttrs.keyword_attributes `MathML)
272 (Ast.Ident (string_of_sort_kind sort_kind, None))
273 and aux_ty = function
274 | None -> builtin_symbol "?"
276 and aux_var = function
279 builtin_symbol "("; name; builtin_symbol ":"; break; k ty;
282 and special_k = function
283 | Ast.AttributedTerm (attrs, t) -> Ast.AttributedTerm (attrs, k t)
285 prerr_endline ("unexpected special: " ^ CicNotationPp.pp_term t);
290 (* persistent state *)
292 let initial_level1_patterns21 () = Hashtbl.create 211
293 let level1_patterns21 = ref (initial_level1_patterns21 ())
294 let compiled21 = ref None
295 let pattern21_matrix = ref []
296 let counter = ref ~-1
301 stack := (!counter,!level1_patterns21,!compiled21,!pattern21_matrix)::!stack;
303 level1_patterns21 := initial_level1_patterns21 ();
305 pattern21_matrix := []
311 | (ocounter,olevel1_patterns21,ocompiled21,opatterns21_matrix)::old ->
314 level1_patterns21 := olevel1_patterns21;
315 compiled21 := ocompiled21;
316 pattern21_matrix := opatterns21_matrix
319 let get_compiled21 () =
320 match !compiled21 with
321 | None -> assert false
322 | Some f -> Lazy.force f
324 let set_compiled21 f = compiled21 := Some f
327 List.fold_right (fun idref t -> Ast.AttributedTerm (`IdRef idref, t))
329 let instantiate21 idrefs env l1 =
330 let rec subst_singleton pos env =
332 Ast.AttributedTerm (attr, t) ->
333 Ast.AttributedTerm (attr, subst_singleton pos env t)
334 | t -> CicNotationUtil.group (subst pos env t)
335 and subst pos env = function
336 | Ast.AttributedTerm (attr, t) ->
337 (* prerr_endline ("loosing attribute " ^ CicNotationPp.pp_attribute attr); *)
339 | Ast.Variable var ->
340 let name, expected_ty = CicNotationEnv.declaration_of_var var in
345 prerr_endline ("name " ^ name ^ " not found in environment");
348 assert (CicNotationEnv.well_typed ty value); (* INVARIANT *)
349 (* following assertion should be a conditional that makes this
350 * instantiation fail *)
351 if not (CicNotationEnv.well_typed expected_ty value) then
353 prerr_endline ("The variable " ^ name ^ " is used with the wrong type in the notation declaration");
356 let value = CicNotationEnv.term_of_value value in
358 match expected_ty with
359 | Env.TermType l -> Ast.AttributedTerm (`Level l,value)
363 | Ast.Magic m -> subst_magic pos env m
364 | Ast.Literal l as t ->
365 let t = add_idrefs idrefs t in
367 | `Keyword k -> [ add_keyword_attrs t ]
369 | Ast.Layout l -> [ Ast.Layout (subst_layout pos env l) ]
370 | t -> [ CicNotationUtil.visit_ast (subst_singleton pos env) t ]
371 and subst_magic pos env = function
372 | Ast.List0 (p, sep_opt)
373 | Ast.List1 (p, sep_opt) ->
374 let rec_decls = CicNotationEnv.declarations_of_term p in
376 List.map (fun (n, _) -> CicNotationEnv.lookup_list env n) rec_decls
378 let values = CicNotationUtil.ncombine rec_values in
382 | Some l -> [ Ast.Literal l; break; space ]
384 let rec instantiate_list acc = function
387 let env = CicNotationEnv.combine rec_decls value_set in
388 instantiate_list (CicNotationUtil.group (subst pos env p) :: acc)
391 let env = CicNotationEnv.combine rec_decls value_set in
392 let terms = subst pos env p in
393 instantiate_list (CicNotationUtil.group (terms @ sep) :: acc) tl
395 if values = [] then []
396 else [hovbox false false (instantiate_list [] values)]
398 let opt_decls = CicNotationEnv.declarations_of_term p in
400 let rec build_env = function
402 | (name, ty) :: tl ->
403 (* assumption: if one of the value is None then all are *)
404 (match CicNotationEnv.lookup_opt env name with
406 | Some v -> (name, (ty, v)) :: build_env tl)
408 try build_env opt_decls with Exit -> []
413 | _ -> subst pos env p
415 | _ -> assert false (* impossible *)
416 and subst_layout pos env = function
417 | Ast.Box (kind, tl) ->
418 let tl' = subst_children pos env tl in
419 Ast.Box (kind, List.concat tl')
420 | l -> CicNotationUtil.visit_layout (subst_singleton pos env) l
421 and subst_children pos env =
429 (* | `None -> assert false *)
432 [ subst pos' env child ]
438 (* | `None -> assert false *)
441 (subst pos env hd) :: subst_children pos' env tl
443 subst_singleton `Left env l1
445 let rec pp_ast1 term =
446 let rec pp_value = function
447 | CicNotationEnv.NumValue _ as v -> v
448 | CicNotationEnv.StringValue _ as v -> v
449 (* | CicNotationEnv.TermValue t when t == term -> CicNotationEnv.TermValue (pp_ast0 t pp_ast1) *)
450 | CicNotationEnv.TermValue t -> CicNotationEnv.TermValue (pp_ast1 t)
451 | CicNotationEnv.OptValue None as v -> v
452 | CicNotationEnv.OptValue (Some v) ->
453 CicNotationEnv.OptValue (Some (pp_value v))
454 | CicNotationEnv.ListValue vl ->
455 CicNotationEnv.ListValue (List.map pp_value vl)
457 let ast_env_of_env env =
458 List.map (fun (var, (ty, value)) -> (var, (ty, pp_value value))) env
460 (* prerr_endline ("pattern matching from 2 to 1 on term " ^ CicNotationPp.pp_term term); *)
462 | Ast.AttributedTerm (attrs, term') ->
463 Ast.AttributedTerm (attrs, pp_ast1 term')
465 (match (get_compiled21 ()) term with
466 | None -> pp_ast0 term pp_ast1
467 | Some (env, ctors, pid) ->
469 List.flatten (List.map CicNotationUtil.get_idrefs ctors)
473 Hashtbl.find !level1_patterns21 pid
474 with Not_found -> assert false
476 instantiate21 idrefs (ast_env_of_env env) l1)
478 let load_patterns21 t =
479 set_compiled21 (lazy (Content2presMatcher.Matcher21.compiler t))
482 debug_print (lazy "pp_ast <-");
483 let ast' = pp_ast1 ast in
484 debug_print (lazy ("pp_ast -> " ^ CicNotationPp.pp_term ast'));
487 exception Pretty_printer_not_found
489 let fill_pos_info l1_pattern = l1_pattern
490 (* let rec aux toplevel pos =
497 | Ast.Variable _ as t -> add_pos_info pos t
500 aux true l1_pattern *)
507 let add_pretty_printer l2 (CicNotationParser.CL1P (l1,precedence)) =
508 let id = fresh_id () in
509 let l1' = add_level_info precedence (fill_pos_info l1) in
510 let l2' = CicNotationUtil.strip_attributes l2 in
511 Hashtbl.add !level1_patterns21 id l1';
512 pattern21_matrix := (l2', id) :: !pattern21_matrix;
513 load_patterns21 !pattern21_matrix;
516 let remove_pretty_printer id =
518 Hashtbl.remove !level1_patterns21 id;
519 with Not_found -> raise Pretty_printer_not_found);
520 pattern21_matrix := List.filter (fun (_, id') -> id <> id') !pattern21_matrix;
521 load_patterns21 !pattern21_matrix
523 (* presentation -> content *)
525 let unopt_names names env =
526 let rec aux acc = function
527 | (name, (ty, v)) :: tl when List.mem name names ->
529 | Env.OptType ty, Env.OptValue (Some v) ->
530 aux ((name, (ty, v)) :: acc) tl
532 | hd :: tl -> aux (hd :: acc) tl
537 let head_names names env =
538 let rec aux acc = function
539 | (name, (ty, v)) :: tl when List.mem name names ->
541 | Env.ListType ty, Env.ListValue (v :: _) ->
542 aux ((name, (ty, v)) :: acc) tl
543 | Env.TermType _, Env.TermValue _ ->
544 aux ((name, (ty, v)) :: acc) tl
546 | _ :: tl -> aux acc tl
547 (* base pattern may contain only meta names, thus we trash all others *)
552 let tail_names names env =
553 let rec aux acc = function
554 | (name, (ty, v)) :: tl when List.mem name names ->
556 | Env.ListType ty, Env.ListValue (_ :: vtl) ->
557 aux ((name, (Env.ListType ty, Env.ListValue vtl)) :: acc) tl
558 | Env.TermType _, Env.TermValue _ ->
559 aux ((name, (ty, v)) :: acc) tl
561 | binding :: tl -> aux (binding :: acc) tl
566 let instantiate_level2 env term =
567 (* prerr_endline ("istanzio: " ^ CicNotationPp.pp_term term); *)
568 let fresh_env = ref [] in
569 let lookup_fresh_name n =
571 List.assoc n !fresh_env
573 let new_name = CicNotationUtil.fresh_name () in
574 fresh_env := (n, new_name) :: !fresh_env;
577 let rec aux env term =
578 (* prerr_endline ("ENV " ^ CicNotationPp.pp_env env); *)
580 | Ast.AttributedTerm (a, term) -> (*Ast.AttributedTerm (a, *)aux env term
581 | Ast.Appl terms -> Ast.Appl (List.map (aux env) terms)
582 | Ast.Binder (binder, var, body) ->
583 Ast.Binder (binder, aux_capture_var env var, aux env body)
584 | Ast.Case (term, indty, outty_opt, patterns) ->
585 Ast.Case (aux env term, indty, aux_opt env outty_opt,
586 List.map (aux_branch env) patterns)
587 | Ast.LetIn (var, t1, t3) ->
588 Ast.LetIn (aux_capture_var env var, aux env t1, aux env t3)
589 | Ast.LetRec (kind, definitions, body) ->
590 Ast.LetRec (kind, List.map (aux_definition env) definitions,
592 | Ast.Uri (name, None) -> Ast.Uri (name, None)
593 | Ast.Uri (name, Some substs) ->
594 Ast.Uri (name, Some (aux_substs env substs))
595 | Ast.Ident (name, Some substs) ->
596 Ast.Ident (name, Some (aux_substs env substs))
597 | Ast.Meta (index, substs) -> Ast.Meta (index, aux_meta_substs env substs)
604 | Ast.UserInput -> term
606 | Ast.Magic magic -> aux_magic env magic
607 | Ast.Variable var -> aux_variable env var
609 | Ast.Cast (t, ty) -> Ast.Cast (aux env t, aux env ty)
612 and aux_opt env = function
613 | Some term -> Some (aux env term)
615 and aux_capture_var env (name, ty_opt) = (aux env name, aux_opt env ty_opt)
616 and aux_branch env (pattern, term) =
617 (aux_pattern env pattern, aux env term)
618 and aux_pattern env =
620 Ast.Pattern (head, hrefs, vars) ->
621 Ast.Pattern (head, hrefs, List.map (aux_capture_var env) vars)
622 | Ast.Wildcard -> Ast.Wildcard
623 and aux_definition env (params, var, term, i) =
624 (List.map (aux_capture_var env) params, aux_capture_var env var, aux env term, i)
625 and aux_substs env substs =
626 List.map (fun (name, term) -> (name, aux env term)) substs
627 and aux_meta_substs env meta_substs = List.map (aux_opt env) meta_substs
628 and aux_variable env = function
629 | Ast.NumVar name -> Ast.Num (Env.lookup_num env name, 0)
630 | Ast.IdentVar name -> Ast.Ident (Env.lookup_string env name, None)
631 | Ast.TermVar (name,(Ast.Level l|Ast.Self l)) ->
632 Ast.AttributedTerm (`Level l,Env.lookup_term env name)
633 | Ast.FreshVar name -> Ast.Ident (lookup_fresh_name name, None)
634 | Ast.Ascription (term, name) -> assert false
635 and aux_magic env = function
636 | Ast.Default (some_pattern, none_pattern) ->
637 let some_pattern_names = CicNotationUtil.names_of_term some_pattern in
638 let none_pattern_names = CicNotationUtil.names_of_term none_pattern in
641 (fun name -> not (List.mem name none_pattern_names))
644 (match opt_names with
645 | [] -> assert false (* some pattern must contain at least 1 name *)
646 | (name :: _) as names ->
647 (match Env.lookup_value env name with
648 | Env.OptValue (Some _) ->
649 (* assumption: if "name" above is bound to Some _, then all
650 * names returned by "meta_names_of" are bound to Some _ as well
652 aux (unopt_names names env) some_pattern
653 | Env.OptValue None -> aux env none_pattern
655 prerr_endline (sprintf
656 "lookup of %s in env %s did not return an optional value"
657 name (CicNotationPp.pp_env env));
659 | Ast.Fold (`Left, base_pattern, names, rec_pattern) ->
660 let acc_name = List.hd names in (* names can't be empty, cfr. parser *)
662 List.filter ((<>) acc_name)
663 (CicNotationUtil.names_of_term rec_pattern)
665 (match meta_names with
666 | [] -> assert false (* as above *)
667 | (name :: _) as names ->
668 let rec instantiate_fold_left acc env' =
669 match Env.lookup_value env' name with
670 | Env.ListValue (_ :: _) ->
671 instantiate_fold_left
673 acc_name, (Env.TermType 0, Env.TermValue acc)
675 aux (acc_binding :: head_names names env') rec_pattern)
676 (tail_names names env')
677 | Env.ListValue [] -> acc
680 instantiate_fold_left (aux env base_pattern) env)
681 | Ast.Fold (`Right, base_pattern, names, rec_pattern) ->
682 let acc_name = List.hd names in (* names can't be empty, cfr. parser *)
684 List.filter ((<>) acc_name)
685 (CicNotationUtil.names_of_term rec_pattern)
687 (match meta_names with
688 | [] -> assert false (* as above *)
689 | (name :: _) as names ->
690 let rec instantiate_fold_right env' =
691 match Env.lookup_value env' name with
692 | Env.ListValue (_ :: _) ->
693 let acc = instantiate_fold_right (tail_names names env') in
695 acc_name, (Env.TermType 0, Env.TermValue acc)
697 aux (acc_binding :: head_names names env') rec_pattern
698 | Env.ListValue [] -> aux env base_pattern
701 instantiate_fold_right env)
702 | Ast.If (_, p_true, p_false) as t ->
703 aux env (CicNotationUtil.find_branch (Ast.Magic t))
704 | Ast.Fail -> assert false
711 let _ = load_patterns21 []