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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28 module Ast = CicNotationPt
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.Ident (name, Some substs) ->
56 Ast.Ident (name, Some (aux_substs substs))
57 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
58 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
59 | (Ast.AttributedTerm _
63 | Ast.Variable _) as t -> special_k t
70 | Ast.UserInput) as t -> t
71 and aux_opt = function
73 | Some term -> Some (k term)
74 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
75 and aux_patterns k_xref patterns = List.map (aux_pattern k_xref) patterns
76 and aux_pattern k_xref =
78 Ast.Pattern (head, hrefs, vars), term ->
79 Ast.Pattern (head, k_xref hrefs, List.map aux_capture_variable vars), k term
80 | Ast.Wildcard, term -> Ast.Wildcard, k term
81 and aux_subst (name, term) = (name, k term)
82 and aux_substs substs = List.map aux_subst substs
86 let visit_layout k = function
87 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
88 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
89 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
90 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
91 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
92 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
93 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
94 | Ast.InfRule (t1, t2, t3) -> Ast.InfRule (k t1, k t2, k t3)
95 | Ast.Sqrt t -> Ast.Sqrt (k t)
96 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
97 | Ast.Break -> Ast.Break
98 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
99 | Ast.Group terms -> Ast.Group (List.map k terms)
100 | Ast.Mstyle (l, term) -> Ast.Mstyle (l, List.map k term)
101 | Ast.Mpadded (l, term) -> Ast.Mpadded (l, List.map k term)
103 let visit_magic k = function
104 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
105 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
106 | Ast.Opt t -> Ast.Opt (k t)
107 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
108 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
109 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
110 | Ast.Fail -> Ast.Fail
112 let visit_variable k = function
116 | Ast.FreshVar _ as t -> t
117 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
119 let variables_of_term t =
120 let rec vars = ref [] in
122 if List.mem v !vars then ()
123 else vars := v :: !vars
125 let rec aux = function
126 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
127 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
128 | Ast.Variable v -> Ast.Variable (aux_variable v)
129 | Ast.Literal _ as t -> t
130 | Ast.AttributedTerm (_, t) -> aux t
131 | t -> visit_ast aux t
132 and aux_variable = function
135 | Ast.TermVar _) as t ->
138 | Ast.FreshVar _ as t -> t
139 | Ast.Ascription _ -> assert false
144 let names_of_term t =
148 | Ast.TermVar (s,_) -> s
151 List.map aux (variables_of_term t)
153 let keywords_of_term t =
154 let rec keywords = ref [] in
155 let add_keyword k = keywords := k :: !keywords in
156 let rec aux = function
157 | Ast.AttributedTerm (_, t) -> aux t
158 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
159 | Ast.Literal (`Keyword k) as t ->
162 | Ast.Literal _ as t -> t
163 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
164 | Ast.Variable _ as v -> v
165 | t -> visit_ast aux t
170 let rec strip_attributes t =
171 let special_k = function
172 | Ast.AttributedTerm (_, term) -> strip_attributes term
173 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
174 | Ast.Variable _ as t -> t
177 visit_ast ~special_k strip_attributes t
181 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
182 | Ast.AttributedTerm (_, t) -> get_idrefs t
185 let meta_names_of_term term =
186 let rec names = ref [] in
188 if List.mem n !names then ()
189 else names := n :: !names
191 let rec aux = function
192 | Ast.AttributedTerm (_, term) -> aux term
193 | Ast.Appl terms -> List.iter aux terms
194 | Ast.Binder (_, _, body) -> aux body
195 | Ast.Case (term, indty, outty_opt, patterns) ->
198 List.iter aux_branch patterns
199 | Ast.LetIn (_, t1, t3) ->
202 | Ast.LetRec (_, definitions, body) ->
203 List.iter aux_definition definitions ;
205 | Ast.Uri (_, Some substs) -> aux_substs substs
206 | Ast.Ident (_, Some substs) -> aux_substs substs
207 | Ast.Meta (_, substs) -> aux_meta_substs substs
215 | Ast.UserInput -> ()
217 | Ast.Magic magic -> aux_magic magic
218 | Ast.Variable var -> aux_variable var
221 and aux_opt = function
222 | Some term -> aux term
224 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
225 and aux_branch (pattern, term) =
226 aux_pattern pattern ;
230 Ast.Pattern (head, _, vars) -> List.iter aux_capture_var vars
232 and aux_definition (params, var, term, decrno) =
233 List.iter aux_capture_var params ;
234 aux_capture_var var ;
236 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
237 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
238 and aux_variable = function
239 | Ast.NumVar name -> add_name name
240 | Ast.IdentVar name -> add_name name
241 | Ast.TermVar (name,_) -> add_name name
242 | Ast.FreshVar _ -> ()
243 | Ast.Ascription _ -> assert false
244 and aux_magic = function
245 | Ast.Default (t1, t2)
246 | Ast.Fold (_, t1, _, t2) ->
249 | Ast.If (t1, t2, t3) ->
259 let rectangular matrix =
260 let columns = Array.length matrix.(0) in
262 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
267 let matrix = Array.of_list (List.map Array.of_list ll) in
268 assert (rectangular matrix);
269 let rows = Array.length matrix in
270 let columns = Array.length matrix.(0) in
271 let lists = ref [] in
272 for j = 0 to columns - 1 do
274 for i = 0 to rows - 1 do
275 l := matrix.(i).(j) :: !l
277 lists := List.rev !l :: !lists
281 let string_of_literal = function
286 let boxify = function
288 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
290 let unboxify = function
291 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
296 | l -> Ast.Layout (Ast.Group l)
302 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
303 | term :: terms -> aux (term :: acc) terms
307 let dress ~sep:sauce =
312 | hd :: tl -> hd :: sauce :: aux tl
316 let dressn ~sep:sauces =
321 | hd :: tl -> hd :: sauces @ aux tl
325 let find_appl_pattern_uris ap =
328 | Ast.UriPattern uri -> uri :: acc
329 | Ast.ImplicitPattern
330 | Ast.VarPattern _ -> acc
331 | Ast.ApplPattern apl -> List.fold_left aux acc apl
333 let uris = aux [] ap in
334 HExtlib.list_uniq (List.fast_sort UriManager.compare uris)
336 let rec find_branch =
338 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
339 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
342 let cic_name_of_name = function
343 | Ast.Ident ("_", None) -> Cic.Anonymous
344 | Ast.Ident (name, None) -> Cic.Name name
347 let name_of_cic_name =
348 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
349 (* ZACK why we used to generate dummy xrefs? *)
350 let add_dummy_xref t = t in
352 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
353 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
355 let fresh_index = ref ~-1
357 type notation_id = int
363 (* TODO ensure that names generated by fresh_var do not clash with user's *)
364 let fresh_name () = "η" ^ string_of_int (fresh_id ())
366 let rec freshen_term ?(index = ref 0) term =
367 let freshen_term = freshen_term ~index in
368 let fresh_instance () = incr index; !index in
369 let special_k = function
370 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
371 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
372 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
373 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
374 | Ast.Literal _ as t -> t
378 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
379 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
380 | t -> visit_ast ~special_k freshen_term t
382 let freshen_obj obj =
384 let freshen_term = freshen_term ~index in
385 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
386 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
387 let freshen_capture_variables =
388 List.map (fun (n,t) -> (freshen_term n, HExtlib.map_option freshen_term t))
391 | CicNotationPt.Inductive (params, indtypes) ->
394 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
397 CicNotationPt.Inductive (freshen_capture_variables params, indtypes)
398 | CicNotationPt.Theorem (flav, n, t, ty_opt) ->
400 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
402 CicNotationPt.Theorem (flav, n, freshen_term t, ty_opt)
403 | CicNotationPt.Record (params, n, ty, fields) ->
404 CicNotationPt.Record (freshen_capture_variables params, n,
405 freshen_term ty, freshen_name_ty_b fields)
407 let freshen_term = freshen_term ?index:None