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.
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8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
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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/
28 module Ast = NotationPt
30 let visit_ast ?(special_k = fun _ -> assert false)
31 ?(map_xref_option= fun x -> x) ?(map_case_indty= fun x -> x)
33 fun k x -> match x with None -> None | Some x -> Some (k x))
36 let rec aux = function
37 | Ast.Appl terms -> Ast.Appl (List.map k terms)
38 | Ast.Binder (kind, var, body) ->
39 Ast.Binder (kind, aux_capture_variable var, k body)
40 | Ast.Case (term, indtype, typ, patterns) ->
41 Ast.Case (k term, map_case_indty indtype, map_case_outtype k typ,
42 aux_patterns map_xref_option patterns)
43 | Ast.Cast (t1, t2) -> Ast.Cast (k t1, k t2)
44 | Ast.LetIn (var, t1, t3) ->
45 Ast.LetIn (aux_capture_variable var, k t1, k t3)
46 | Ast.LetRec (kind, definitions, term) ->
49 (fun (params, var, ty, decrno) ->
50 List.map aux_capture_variable params, aux_capture_variable var,
54 Ast.LetRec (kind, definitions, k term)
55 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
56 | (Ast.AttributedTerm _
60 | Ast.Variable _) as t -> special_k t
68 | Ast.UserInput) as t -> t
69 and aux_opt = function
71 | Some term -> Some (k term)
72 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
73 and aux_patterns k_xref patterns = List.map (aux_pattern k_xref) patterns
74 and aux_pattern k_xref =
76 Ast.Pattern (head, hrefs, vars), term ->
77 Ast.Pattern (head, k_xref hrefs, List.map aux_capture_variable vars), k term
78 | Ast.Wildcard, term -> Ast.Wildcard, k term
82 let visit_layout k = function
83 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
84 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
85 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
86 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
87 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
88 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
89 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
90 | Ast.InfRule (t1, t2, t3) -> Ast.InfRule (k t1, k t2, k t3)
91 | Ast.Sqrt t -> Ast.Sqrt (k t)
92 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
93 | Ast.Break -> Ast.Break
94 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
95 | Ast.Group terms -> Ast.Group (List.map k terms)
96 | Ast.Mstyle (l, term) -> Ast.Mstyle (l, List.map k term)
97 | Ast.Mpadded (l, term) -> Ast.Mpadded (l, List.map k term)
98 | Ast.Maction terms -> Ast.Maction (List.map k terms)
100 let visit_magic k = function
101 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
102 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
103 | Ast.Opt t -> Ast.Opt (k t)
104 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
105 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
106 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
107 | Ast.Fail -> Ast.Fail
109 let visit_variable k = function
113 | Ast.FreshVar _ as t -> t
114 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
116 let variables_of_term t =
117 let rec vars = ref [] in
119 if List.mem v !vars then ()
120 else vars := v :: !vars
122 let rec aux = function
123 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
124 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
125 | Ast.Variable v -> Ast.Variable (aux_variable v)
126 | Ast.Literal _ as t -> t
127 | Ast.AttributedTerm (_, t) -> aux t
128 | t -> visit_ast aux t
129 and aux_variable = function
132 | Ast.TermVar _) as t ->
135 | Ast.FreshVar _ as t -> t
136 | Ast.Ascription _ -> assert false
141 let names_of_term t =
145 | Ast.TermVar (s,_) -> s
148 List.map aux (variables_of_term t)
150 let keywords_of_term t =
151 let rec keywords = ref [] in
152 let add_keyword k = keywords := k :: !keywords in
153 let rec aux = function
154 | Ast.AttributedTerm (_, t) -> aux t
155 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
156 | Ast.Literal (`Keyword k) as t ->
159 | Ast.Literal _ as t -> t
160 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
161 | Ast.Variable _ as v -> v
162 | t -> visit_ast aux t
167 let rec strip_attributes t =
168 let special_k = function
169 | Ast.AttributedTerm (_, term) -> strip_attributes term
170 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
171 | Ast.Variable _ as t -> t
174 visit_ast ~special_k strip_attributes t
178 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
179 | Ast.AttributedTerm (_, t) -> get_idrefs t
182 let meta_names_of_term term =
183 let rec names = ref [] in
185 if List.mem n !names then ()
186 else names := n :: !names
188 let rec aux = function
189 | Ast.AttributedTerm (_, term) -> aux term
190 | Ast.Appl terms -> List.iter aux terms
191 | Ast.Binder (_, _, body) -> aux body
192 | Ast.Case (term, indty, outty_opt, patterns) ->
195 List.iter aux_branch patterns
196 | Ast.LetIn (_, t1, t3) ->
199 | Ast.LetRec (_, definitions, body) ->
200 List.iter aux_definition definitions ;
202 | Ast.Meta (_, substs) -> aux_meta_substs substs
209 | Ast.UserInput -> ()
211 | Ast.Magic magic -> aux_magic magic
212 | Ast.Variable var -> aux_variable var
215 and aux_opt = function
216 | Some term -> aux term
218 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
219 and aux_branch (pattern, term) =
220 aux_pattern pattern ;
224 Ast.Pattern (head, _, vars) -> List.iter aux_capture_var vars
226 and aux_definition (params, var, term, decrno) =
227 List.iter aux_capture_var params ;
228 aux_capture_var var ;
230 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
231 and aux_variable = function
232 | Ast.NumVar name -> add_name name
233 | Ast.IdentVar name -> add_name name
234 | Ast.TermVar (name,_) -> add_name name
235 | Ast.FreshVar _ -> ()
236 | Ast.Ascription _ -> assert false
237 and aux_magic = function
238 | Ast.Default (t1, t2)
239 | Ast.Fold (_, t1, _, t2) ->
242 | Ast.If (t1, t2, t3) ->
252 let rectangular matrix =
253 let columns = Array.length matrix.(0) in
255 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
260 let matrix = Array.of_list (List.map Array.of_list ll) in
261 assert (rectangular matrix);
262 let rows = Array.length matrix in
263 let columns = Array.length matrix.(0) in
264 let lists = ref [] in
265 for j = 0 to columns - 1 do
267 for i = 0 to rows - 1 do
268 l := matrix.(i).(j) :: !l
270 lists := List.rev !l :: !lists
274 let string_of_literal = function
279 let boxify = function
281 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
283 let unboxify = function
284 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
289 | l -> Ast.Layout (Ast.Group l)
295 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
296 | term :: terms -> aux (term :: acc) terms
300 let dress ~sep:sauce =
305 | hd :: tl -> hd :: sauce :: aux tl
309 let dressn ~sep:sauces =
314 | hd :: tl -> hd :: sauces @ aux tl
318 let find_appl_pattern_uris ap =
321 | Ast.NRefPattern nref -> nref :: acc
322 | Ast.ImplicitPattern
323 | Ast.VarPattern _ -> acc
324 | Ast.ApplPattern apl -> List.fold_left aux acc apl
326 let uris = aux [] ap in
327 HExtlib.list_uniq (List.fast_sort NReference.compare uris)
329 let rec find_branch =
331 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
332 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
335 let fresh_index = ref ~-1
337 type notation_id = int
343 (* TODO ensure that names generated by fresh_var do not clash with user's *)
344 (* FG: "η" is not an identifier (it is rendered, but not be parsed) *)
345 let fresh_name () = "eta" ^ string_of_int (fresh_id ())
347 (* XXX FIXME: was used to add instance indices to symbols/numbers
348 * do we even need a similar operation?
349 * currently an identity function! *)
350 let rec freshen_term ?(index = ref 0) term =
351 let freshen_term = freshen_term ~index in
352 let fresh_instance () = incr index; !index in
353 let special_k = function
354 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
355 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
356 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
357 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
358 | Ast.Literal _ as t -> t
362 | Ast.Symbol (s, x) -> Ast.Symbol (s, x (* fresh_instance () *))
363 | Ast.Num (s, x) -> Ast.Num (s, x (* fresh_instance () *))
364 | t -> visit_ast ~special_k freshen_term t
366 let freshen_obj obj =
368 let freshen_term = freshen_term ~index in
369 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
370 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
371 let freshen_capture_variables =
372 List.map (fun (n,t) -> (freshen_term n, HExtlib.map_option freshen_term t))
375 | NotationPt.Inductive (params, indtypes) ->
378 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
381 NotationPt.Inductive (freshen_capture_variables params, indtypes)
382 | NotationPt.Theorem (flav, n, t, ty_opt,p) ->
384 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
386 NotationPt.Theorem (flav, n, freshen_term t, ty_opt,p)
387 | NotationPt.Record (params, n, ty, fields) ->
388 NotationPt.Record (freshen_capture_variables params, n,
389 freshen_term ty, freshen_name_ty_b fields)
391 let freshen_term = freshen_term ?index:None
393 let rec refresh_uri_in_term ~refresh_uri_in_term:refresh_in_cic
394 ~refresh_uri_in_reference
397 NotationPt.NRef ref -> NotationPt.NRef (refresh_uri_in_reference ref)
398 | NotationPt.NCic t -> NotationPt.NCic (refresh_in_cic t)
401 (refresh_uri_in_term ~refresh_uri_in_term:refresh_in_cic
402 ~refresh_uri_in_reference) t
403 ~special_k:(fun x -> x)
404 ~map_xref_option:(function Some ref -> Some (refresh_uri_in_reference ref)
406 ~map_case_indty:(function (Some (s,Some ref)) -> Some (s, Some
407 (refresh_uri_in_reference ref)) | x -> x)