1 (* Copyright (C) 2004-2005, HELM Team.
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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 = CicNotationPt
30 let visit_ast ?(special_k = fun _ -> assert false) k =
31 let rec aux = function
32 | Ast.Appl terms -> Ast.Appl (List.map k terms)
33 | Ast.Binder (kind, var, body) ->
34 Ast.Binder (kind, aux_capture_variable var, k body)
35 | Ast.Case (term, indtype, typ, patterns) ->
36 Ast.Case (k term, indtype, aux_opt typ, aux_patterns patterns)
37 | Ast.Cast (t1, t2) -> Ast.Cast (k t1, k t2)
38 | Ast.LetIn (var, t1, t2) ->
39 Ast.LetIn (aux_capture_variable var, k t1, k t2)
40 | Ast.LetRec (kind, definitions, term) ->
43 (fun (var, ty, n) -> aux_capture_variable var, k ty, n)
46 Ast.LetRec (kind, definitions, k term)
47 | Ast.Ident (name, Some substs) ->
48 Ast.Ident (name, Some (aux_substs substs))
49 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
50 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
51 | (Ast.AttributedTerm _
55 | Ast.Variable _) as t -> special_k t
62 | Ast.UserInput) as t -> t
63 and aux_opt = function
65 | Some term -> Some (k term)
66 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
67 and aux_patterns patterns = List.map aux_pattern patterns
68 and aux_pattern ((head, hrefs, vars), term) =
69 ((head, hrefs, List.map aux_capture_variable vars), k term)
70 and aux_subst (name, term) = (name, k term)
71 and aux_substs substs = List.map aux_subst substs
75 let visit_layout k = function
76 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
77 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
78 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
79 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
80 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
81 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
82 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
83 | Ast.Sqrt t -> Ast.Sqrt (k t)
84 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
85 | Ast.Break -> Ast.Break
86 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
87 | Ast.Group terms -> Ast.Group (List.map k terms)
89 let visit_magic k = function
90 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
91 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
92 | Ast.Opt t -> Ast.Opt (k t)
93 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
94 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
95 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
96 | Ast.Fail -> Ast.Fail
98 let visit_variable k = function
102 | Ast.FreshVar _ as t -> t
103 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
105 let variables_of_term t =
106 let rec vars = ref [] in
108 if List.mem v !vars then ()
109 else vars := v :: !vars
111 let rec aux = function
112 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
113 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
114 | Ast.Variable v -> Ast.Variable (aux_variable v)
115 | Ast.Literal _ as t -> t
116 | Ast.AttributedTerm (_, t) -> aux t
117 | t -> visit_ast aux t
118 and aux_variable = function
121 | Ast.TermVar _) as t ->
124 | Ast.FreshVar _ as t -> t
125 | Ast.Ascription _ -> assert false
130 let names_of_term t =
137 List.map aux (variables_of_term t)
139 let keywords_of_term t =
140 let rec keywords = ref [] in
141 let add_keyword k = keywords := k :: !keywords in
142 let rec aux = function
143 | Ast.AttributedTerm (_, t) -> aux t
144 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
145 | Ast.Literal (`Keyword k) as t ->
148 | Ast.Literal _ as t -> t
149 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
150 | Ast.Variable _ as v -> v
151 | t -> visit_ast aux t
156 let rec strip_attributes t =
157 let special_k = function
158 | Ast.AttributedTerm (_, term) -> strip_attributes term
159 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
160 | Ast.Variable _ as t -> t
163 visit_ast ~special_k strip_attributes t
167 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
168 | Ast.AttributedTerm (_, t) -> get_idrefs t
171 let meta_names_of_term term =
172 let rec names = ref [] in
174 if List.mem n !names then ()
175 else names := n :: !names
177 let rec aux = function
178 | Ast.AttributedTerm (_, term) -> aux term
179 | Ast.Appl terms -> List.iter aux terms
180 | Ast.Binder (_, _, body) -> aux body
181 | Ast.Case (term, indty, outty_opt, patterns) ->
184 List.iter aux_branch patterns
185 | Ast.LetIn (_, t1, t2) ->
188 | Ast.LetRec (_, definitions, body) ->
189 List.iter aux_definition definitions ;
191 | Ast.Uri (_, Some substs) -> aux_substs substs
192 | Ast.Ident (_, Some substs) -> aux_substs substs
193 | Ast.Meta (_, substs) -> aux_meta_substs substs
201 | Ast.UserInput -> ()
203 | Ast.Magic magic -> aux_magic magic
204 | Ast.Variable var -> aux_variable var
207 and aux_opt = function
208 | Some term -> aux term
210 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
211 and aux_branch (pattern, term) =
212 aux_pattern pattern ;
214 and aux_pattern (head, _, vars) =
215 List.iter aux_capture_var vars
216 and aux_definition (var, term, i) =
217 aux_capture_var var ;
219 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
220 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
221 and aux_variable = function
222 | Ast.NumVar name -> add_name name
223 | Ast.IdentVar name -> add_name name
224 | Ast.TermVar name -> add_name name
225 | Ast.FreshVar _ -> ()
226 | Ast.Ascription _ -> assert false
227 and aux_magic = function
228 | Ast.Default (t1, t2)
229 | Ast.Fold (_, t1, _, t2) ->
232 | Ast.If (t1, t2, t3) ->
242 let rectangular matrix =
243 let columns = Array.length matrix.(0) in
245 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
250 let matrix = Array.of_list (List.map Array.of_list ll) in
251 assert (rectangular matrix);
252 let rows = Array.length matrix in
253 let columns = Array.length matrix.(0) in
254 let lists = ref [] in
255 for j = 0 to columns - 1 do
257 for i = 0 to rows - 1 do
258 l := matrix.(i).(j) :: !l
260 lists := List.rev !l :: !lists
264 let string_of_literal = function
269 let boxify = function
271 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
273 let unboxify = function
274 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
279 | l -> Ast.Layout (Ast.Group l)
285 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
286 | term :: terms -> aux (term :: acc) terms
290 let dress ~sep:sauce =
295 | hd :: tl -> hd :: sauce :: aux tl
299 let dressn ~sep:sauces =
304 | hd :: tl -> hd :: sauces @ aux tl
308 let find_appl_pattern_uris ap =
311 | Ast.UriPattern uri -> uri :: acc
312 | Ast.ImplicitPattern
313 | Ast.VarPattern _ -> acc
314 | Ast.ApplPattern apl -> List.fold_left aux acc apl
316 let uris = aux [] ap in
317 HExtlib.list_uniq (List.fast_sort UriManager.compare uris)
319 let rec find_branch =
321 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
322 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
325 let cic_name_of_name = function
326 | Ast.Ident ("_", None) -> Cic.Anonymous
327 | Ast.Ident (name, None) -> Cic.Name name
330 let name_of_cic_name =
331 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
332 (* ZACK why we used to generate dummy xrefs? *)
333 let add_dummy_xref t = t in
335 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
336 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
338 let fresh_index = ref ~-1
340 type notation_id = int
346 (* TODO ensure that names generated by fresh_var do not clash with user's *)
347 let fresh_name () = "fresh" ^ string_of_int (fresh_id ())
349 let rec freshen_term ?(index = ref 0) term =
350 let freshen_term = freshen_term ~index in
351 let fresh_instance () = incr index; !index in
352 let special_k = function
353 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
354 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
355 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
356 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
357 | Ast.Literal _ as t -> t
361 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
362 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
363 | t -> visit_ast ~special_k freshen_term t
365 let freshen_obj obj =
367 let freshen_term = freshen_term ~index in
368 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
369 let freshen_name_ty_b = List.map (fun (n, t, b) -> (n, freshen_term t, b)) in
371 | CicNotationPt.Inductive (params, indtypes) ->
374 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
377 CicNotationPt.Inductive (freshen_name_ty params, indtypes)
378 | CicNotationPt.Theorem (flav, n, t, ty_opt) ->
380 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
382 CicNotationPt.Theorem (flav, n, freshen_term t, ty_opt)
383 | CicNotationPt.Record (params, n, ty, fields) ->
384 CicNotationPt.Record (freshen_name_ty params, n, freshen_term ty,
385 freshen_name_ty_b fields)
387 let freshen_term = freshen_term ?index:None