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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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.Ident (name, Some substs) ->
47 Ast.Ident (name, Some (aux_substs substs))
48 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
49 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
50 | (Ast.AttributedTerm _
54 | Ast.Variable _) as t -> special_k t
63 | Ast.UserInput) as t -> t
64 and aux_opt = function
66 | Some term -> Some (k term)
67 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
68 and aux_patterns k_xref patterns = List.map (aux_pattern k_xref) patterns
69 and aux_pattern k_xref =
71 Ast.Pattern (head, hrefs, vars), term ->
72 Ast.Pattern (head, k_xref hrefs, List.map aux_capture_variable vars), k term
73 | Ast.Wildcard, term -> Ast.Wildcard, k term
74 and aux_subst (name, term) = (name, k term)
75 and aux_substs substs = List.map aux_subst substs
79 let visit_layout k = function
80 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
81 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
82 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
83 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
84 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
85 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
86 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
87 | Ast.InfRule (t1, t2, t3) -> Ast.InfRule (k t1, k t2, k t3)
88 | Ast.Sqrt t -> Ast.Sqrt (k t)
89 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
90 | Ast.Break -> Ast.Break
91 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
92 | Ast.Group terms -> Ast.Group (List.map k terms)
93 | Ast.Mstyle (l, term) -> Ast.Mstyle (l, List.map k term)
94 | Ast.Mpadded (l, term) -> Ast.Mpadded (l, List.map k term)
95 | Ast.Maction terms -> Ast.Maction (List.map k terms)
97 let visit_magic k = function
98 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
99 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
100 | Ast.Opt t -> Ast.Opt (k t)
101 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
102 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
103 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
104 | Ast.Fail -> Ast.Fail
106 let visit_variable k = function
110 | Ast.FreshVar _ as t -> t
111 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
113 let variables_of_term t =
114 let rec vars = ref [] in
116 if List.mem v !vars then ()
117 else vars := v :: !vars
119 let rec aux = function
120 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
121 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
122 | Ast.Variable v -> Ast.Variable (aux_variable v)
123 | Ast.Literal _ as t -> t
124 | Ast.AttributedTerm (_, t) -> aux t
125 | t -> visit_ast aux t
126 and aux_variable = function
129 | Ast.TermVar _) as t ->
132 | Ast.FreshVar _ as t -> t
133 | Ast.Ascription _ -> assert false
138 let names_of_term t =
142 | Ast.TermVar (s,_) -> s
145 List.map aux (variables_of_term t)
147 let keywords_of_term t =
148 let rec keywords = ref [] in
149 let add_keyword k = keywords := k :: !keywords in
150 let rec aux = function
151 | Ast.AttributedTerm (_, t) -> aux t
152 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
153 | Ast.Literal (`Keyword k) as t ->
156 | Ast.Literal _ as t -> t
157 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
158 | Ast.Variable _ as v -> v
159 | t -> visit_ast aux t
164 let rec strip_attributes t =
165 let special_k = function
166 | Ast.AttributedTerm (_, term) -> strip_attributes term
167 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
168 | Ast.Variable _ as t -> t
171 visit_ast ~special_k strip_attributes t
175 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
176 | Ast.AttributedTerm (_, t) -> get_idrefs t
179 let meta_names_of_term term =
180 let rec names = ref [] in
182 if List.mem n !names then ()
183 else names := n :: !names
185 let rec aux = function
186 | Ast.AttributedTerm (_, term) -> aux term
187 | Ast.Appl terms -> List.iter aux terms
188 | Ast.Binder (_, _, body) -> aux body
189 | Ast.Case (term, indty, outty_opt, patterns) ->
192 List.iter aux_branch patterns
193 | Ast.LetIn (_, t1, t3) ->
196 | Ast.Uri (_, Some substs) -> aux_substs substs
197 | Ast.Ident (_, Some substs) -> aux_substs substs
198 | Ast.Meta (_, substs) -> aux_meta_substs substs
206 | Ast.UserInput -> ()
208 | Ast.Magic magic -> aux_magic magic
209 | Ast.Variable var -> aux_variable var
212 and aux_opt = function
213 | Some term -> aux term
215 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
216 and aux_branch (pattern, term) =
217 aux_pattern pattern ;
221 Ast.Pattern (head, _, vars) -> List.iter aux_capture_var vars
223 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
224 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
225 and aux_variable = function
226 | Ast.NumVar name -> add_name name
227 | Ast.IdentVar name -> add_name name
228 | Ast.TermVar (name,_) -> add_name name
229 | Ast.FreshVar _ -> ()
230 | Ast.Ascription _ -> assert false
231 and aux_magic = function
232 | Ast.Default (t1, t2)
233 | Ast.Fold (_, t1, _, t2) ->
236 | Ast.If (t1, t2, t3) ->
246 let rectangular matrix =
247 let columns = Array.length matrix.(0) in
249 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
254 let matrix = Array.of_list (List.map Array.of_list ll) in
255 assert (rectangular matrix);
256 let rows = Array.length matrix in
257 let columns = Array.length matrix.(0) in
258 let lists = ref [] in
259 for j = 0 to columns - 1 do
261 for i = 0 to rows - 1 do
262 l := matrix.(i).(j) :: !l
264 lists := List.rev !l :: !lists
268 let string_of_literal = function
273 let boxify = function
275 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
277 let unboxify = function
278 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
283 | l -> Ast.Layout (Ast.Group l)
289 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
290 | term :: terms -> aux (term :: acc) terms
294 let dress ~sep:sauce =
299 | hd :: tl -> hd :: sauce :: aux tl
303 let dressn ~sep:sauces =
308 | hd :: tl -> hd :: sauces @ aux tl
312 let find_appl_pattern_uris ap =
315 | Ast.NRefPattern nref -> nref :: acc
316 | Ast.ImplicitPattern
317 | Ast.VarPattern _ -> acc
318 | Ast.ApplPattern apl -> List.fold_left aux acc apl
320 let uris = aux [] ap in
321 HExtlib.list_uniq (List.fast_sort NReference.compare uris)
323 let rec find_branch =
325 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
326 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
329 let fresh_index = ref ~-1
331 type notation_id = int
337 (* TODO ensure that names generated by fresh_var do not clash with user's *)
338 (* FG: "η" is not an identifier (it is rendered, but not parsed) *)
339 let fresh_name () = "eta" ^ string_of_int (fresh_id ())
341 let rec freshen_term ?(index = ref 0) term =
342 let freshen_term = freshen_term ~index in
343 let fresh_instance () = incr index; !index in
344 let special_k = function
345 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
346 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
347 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
348 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
349 | Ast.Literal _ as t -> t
353 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
354 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
355 | t -> visit_ast ~special_k freshen_term t
357 let freshen_obj obj =
359 let freshen_term = freshen_term ~index in
360 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
361 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
362 let freshen_capture_variable (n, t) = freshen_term n, HExtlib.map_option freshen_term t in
363 let freshen_capture_variables = List.map freshen_capture_variable in
365 | NotationPt.Inductive (params, indtypes, attrs) ->
368 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
371 NotationPt.Inductive (freshen_capture_variables params, indtypes, attrs)
372 | NotationPt.Theorem (n, t, ty_opt, attrs) ->
374 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
376 NotationPt.Theorem (n, freshen_term t, ty_opt, attrs)
377 | NotationPt.Record (params, n, ty, fields, attrs) ->
378 NotationPt.Record (freshen_capture_variables params, n,
379 freshen_term ty, freshen_name_ty_b fields, attrs)
380 | NotationPt.LetRec (kind, definitions, attrs) ->
383 (fun (params, var, ty, decrno) ->
384 freshen_capture_variables params, freshen_capture_variable var,
385 freshen_term ty, decrno)
388 NotationPt.LetRec (kind, definitions, attrs)
390 let freshen_term = freshen_term ?index:None
392 let rec refresh_uri_in_term ~refresh_uri_in_term:refresh_in_cic
393 ~refresh_uri_in_reference
396 NotationPt.NRef ref -> NotationPt.NRef (refresh_uri_in_reference ref)
397 | NotationPt.NCic t -> NotationPt.NCic (refresh_in_cic t)
400 (refresh_uri_in_term ~refresh_uri_in_term:refresh_in_cic
401 ~refresh_uri_in_reference) t
402 ~special_k:(fun x -> x)
403 ~map_xref_option:(function Some ref -> Some (refresh_uri_in_reference ref)
405 ~map_case_indty:(function (Some (s,Some ref)) -> Some (s, Some
406 (refresh_uri_in_reference ref)) | x -> x)