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 (params, var, ty, decrno) ->
44 List.map aux_capture_variable params, aux_capture_variable var,
48 Ast.LetRec (kind, definitions, k term)
49 | Ast.Ident (name, Some substs) ->
50 Ast.Ident (name, Some (aux_substs substs))
51 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
52 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
53 | (Ast.AttributedTerm _
57 | Ast.Variable _) as t -> special_k t
64 | Ast.UserInput) as t -> t
65 and aux_opt = function
67 | Some term -> Some (k term)
68 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
69 and aux_patterns patterns = List.map aux_pattern patterns
72 Ast.Pattern (head, hrefs, vars), term ->
73 Ast.Pattern (head, hrefs, List.map aux_capture_variable vars), k term
74 | Ast.Wildcard, term -> Ast.Wildcard, k term
75 and aux_subst (name, term) = (name, k term)
76 and aux_substs substs = List.map aux_subst substs
80 let visit_layout k = function
81 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
82 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
83 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
84 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
85 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
86 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
87 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
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)
94 let visit_magic k = function
95 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
96 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
97 | Ast.Opt t -> Ast.Opt (k t)
98 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
99 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
100 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
101 | Ast.Fail -> Ast.Fail
103 let visit_variable k = function
107 | Ast.FreshVar _ as t -> t
108 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
110 let variables_of_term t =
111 let rec vars = ref [] in
113 if List.mem v !vars then ()
114 else vars := v :: !vars
116 let rec aux = function
117 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
118 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
119 | Ast.Variable v -> Ast.Variable (aux_variable v)
120 | Ast.Literal _ as t -> t
121 | Ast.AttributedTerm (_, t) -> aux t
122 | t -> visit_ast aux t
123 and aux_variable = function
126 | Ast.TermVar _) as t ->
129 | Ast.FreshVar _ as t -> t
130 | Ast.Ascription _ -> assert false
135 let names_of_term t =
142 List.map aux (variables_of_term t)
144 let keywords_of_term t =
145 let rec keywords = ref [] in
146 let add_keyword k = keywords := k :: !keywords in
147 let rec aux = function
148 | Ast.AttributedTerm (_, t) -> aux t
149 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
150 | Ast.Literal (`Keyword k) as t ->
153 | Ast.Literal _ as t -> t
154 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
155 | Ast.Variable _ as v -> v
156 | t -> visit_ast aux t
161 let rec strip_attributes t =
162 let special_k = function
163 | Ast.AttributedTerm (_, term) -> strip_attributes term
164 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
165 | Ast.Variable _ as t -> t
168 visit_ast ~special_k strip_attributes t
172 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
173 | Ast.AttributedTerm (_, t) -> get_idrefs t
176 let meta_names_of_term term =
177 let rec names = ref [] in
179 if List.mem n !names then ()
180 else names := n :: !names
182 let rec aux = function
183 | Ast.AttributedTerm (_, term) -> aux term
184 | Ast.Appl terms -> List.iter aux terms
185 | Ast.Binder (_, _, body) -> aux body
186 | Ast.Case (term, indty, outty_opt, patterns) ->
189 List.iter aux_branch patterns
190 | Ast.LetIn (_, t1, t2) ->
193 | Ast.LetRec (_, definitions, body) ->
194 List.iter aux_definition definitions ;
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_definition (params, var, term, decrno) =
224 List.iter aux_capture_var params ;
225 aux_capture_var var ;
227 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
228 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
229 and aux_variable = function
230 | Ast.NumVar name -> add_name name
231 | Ast.IdentVar name -> add_name name
232 | Ast.TermVar name -> add_name name
233 | Ast.FreshVar _ -> ()
234 | Ast.Ascription _ -> assert false
235 and aux_magic = function
236 | Ast.Default (t1, t2)
237 | Ast.Fold (_, t1, _, t2) ->
240 | Ast.If (t1, t2, t3) ->
250 let rectangular matrix =
251 let columns = Array.length matrix.(0) in
253 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
258 let matrix = Array.of_list (List.map Array.of_list ll) in
259 assert (rectangular matrix);
260 let rows = Array.length matrix in
261 let columns = Array.length matrix.(0) in
262 let lists = ref [] in
263 for j = 0 to columns - 1 do
265 for i = 0 to rows - 1 do
266 l := matrix.(i).(j) :: !l
268 lists := List.rev !l :: !lists
272 let string_of_literal = function
277 let boxify = function
279 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
281 let unboxify = function
282 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
287 | l -> Ast.Layout (Ast.Group l)
293 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
294 | term :: terms -> aux (term :: acc) terms
298 let dress ~sep:sauce =
303 | hd :: tl -> hd :: sauce :: aux tl
307 let dressn ~sep:sauces =
312 | hd :: tl -> hd :: sauces @ aux tl
316 let find_appl_pattern_uris ap =
319 | Ast.UriPattern uri -> uri :: acc
320 | Ast.ImplicitPattern
321 | Ast.VarPattern _ -> acc
322 | Ast.ApplPattern apl -> List.fold_left aux acc apl
324 let uris = aux [] ap in
325 HExtlib.list_uniq (List.fast_sort UriManager.compare uris)
327 let rec find_branch =
329 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
330 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
333 let cic_name_of_name = function
334 | Ast.Ident ("_", None) -> Cic.Anonymous
335 | Ast.Ident (name, None) -> Cic.Name name
338 let name_of_cic_name =
339 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
340 (* ZACK why we used to generate dummy xrefs? *)
341 let add_dummy_xref t = t in
343 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
344 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
346 let fresh_index = ref ~-1
348 type notation_id = int
354 (* TODO ensure that names generated by fresh_var do not clash with user's *)
355 let fresh_name () = "fresh" ^ string_of_int (fresh_id ())
357 let rec freshen_term ?(index = ref 0) term =
358 let freshen_term = freshen_term ~index in
359 let fresh_instance () = incr index; !index in
360 let special_k = function
361 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
362 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
363 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
364 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
365 | Ast.Literal _ as t -> t
369 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
370 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
371 | t -> visit_ast ~special_k freshen_term t
373 let freshen_obj obj =
375 let freshen_term = freshen_term ~index in
376 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
377 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
378 let freshen_capture_variables =
379 List.map (fun (n,t) -> (freshen_term n, HExtlib.map_option freshen_term t))
382 | CicNotationPt.Inductive (params, indtypes) ->
385 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
388 CicNotationPt.Inductive (freshen_capture_variables params, indtypes)
389 | CicNotationPt.Theorem (flav, n, t, ty_opt) ->
391 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
393 CicNotationPt.Theorem (flav, n, freshen_term t, ty_opt)
394 | CicNotationPt.Record (params, n, ty, fields) ->
395 CicNotationPt.Record (freshen_capture_variables params, n,
396 freshen_term ty, freshen_name_ty_b fields)
398 let freshen_term = freshen_term ?index:None