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.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
72 | Ast.UserInput) as t -> t
73 and aux_opt = function
75 | Some term -> Some (k term)
76 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
77 and aux_patterns k_xref patterns = List.map (aux_pattern k_xref) patterns
78 and aux_pattern k_xref =
80 Ast.Pattern (head, hrefs, vars), term ->
81 Ast.Pattern (head, k_xref hrefs, List.map aux_capture_variable vars), k term
82 | Ast.Wildcard, term -> Ast.Wildcard, k term
83 and aux_subst (name, term) = (name, k term)
84 and aux_substs substs = List.map aux_subst substs
88 let visit_layout k = function
89 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
90 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
91 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
92 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
93 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
94 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
95 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
96 | Ast.InfRule (t1, t2, t3) -> Ast.InfRule (k t1, k t2, k t3)
97 | Ast.Sqrt t -> Ast.Sqrt (k t)
98 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
99 | Ast.Break -> Ast.Break
100 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
101 | Ast.Group terms -> Ast.Group (List.map k terms)
102 | Ast.Mstyle (l, term) -> Ast.Mstyle (l, List.map k term)
103 | Ast.Mpadded (l, term) -> Ast.Mpadded (l, List.map k term)
104 | Ast.Maction terms -> Ast.Maction (List.map k terms)
106 let visit_magic k = function
107 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
108 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
109 | Ast.Opt t -> Ast.Opt (k t)
110 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
111 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
112 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
113 | Ast.Fail -> Ast.Fail
115 let visit_variable k = function
119 | Ast.FreshVar _ as t -> t
120 | Ast.Ascription (t, s) -> Ast.Ascription (k t, s)
122 let variables_of_term t =
123 let rec vars = ref [] in
125 if List.mem v !vars then ()
126 else vars := v :: !vars
128 let rec aux = function
129 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
130 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
131 | Ast.Variable v -> Ast.Variable (aux_variable v)
132 | Ast.Literal _ as t -> t
133 | Ast.AttributedTerm (_, t) -> aux t
134 | t -> visit_ast aux t
135 and aux_variable = function
138 | Ast.TermVar _) as t ->
141 | Ast.FreshVar _ as t -> t
142 | Ast.Ascription _ -> assert false
147 let names_of_term t =
151 | Ast.TermVar (s,_) -> s
154 List.map aux (variables_of_term t)
156 let keywords_of_term t =
157 let rec keywords = ref [] in
158 let add_keyword k = keywords := k :: !keywords in
159 let rec aux = function
160 | Ast.AttributedTerm (_, t) -> aux t
161 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
162 | Ast.Literal (`Keyword k) as t ->
165 | Ast.Literal _ as t -> t
166 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
167 | Ast.Variable _ as v -> v
168 | t -> visit_ast aux t
173 let rec strip_attributes t =
174 let special_k = function
175 | Ast.AttributedTerm (_, term) -> strip_attributes term
176 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
177 | Ast.Variable _ as t -> t
180 visit_ast ~special_k strip_attributes t
184 | Ast.AttributedTerm (`IdRef id, t) -> id :: get_idrefs t
185 | Ast.AttributedTerm (_, t) -> get_idrefs t
188 let meta_names_of_term term =
189 let rec names = ref [] in
191 if List.mem n !names then ()
192 else names := n :: !names
194 let rec aux = function
195 | Ast.AttributedTerm (_, term) -> aux term
196 | Ast.Appl terms -> List.iter aux terms
197 | Ast.Binder (_, _, body) -> aux body
198 | Ast.Case (term, indty, outty_opt, patterns) ->
201 List.iter aux_branch patterns
202 | Ast.LetIn (_, t1, t3) ->
205 | Ast.LetRec (_, definitions, body) ->
206 List.iter aux_definition definitions ;
208 | Ast.Uri (_, Some substs) -> aux_substs substs
209 | Ast.Ident (_, Some substs) -> aux_substs substs
210 | Ast.Meta (_, substs) -> aux_meta_substs substs
218 | Ast.UserInput -> ()
220 | Ast.Magic magic -> aux_magic magic
221 | Ast.Variable var -> aux_variable var
224 and aux_opt = function
225 | Some term -> aux term
227 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
228 and aux_branch (pattern, term) =
229 aux_pattern pattern ;
233 Ast.Pattern (head, _, vars) -> List.iter aux_capture_var vars
235 and aux_definition (params, var, term, decrno) =
236 List.iter aux_capture_var params ;
237 aux_capture_var var ;
239 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
240 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
241 and aux_variable = function
242 | Ast.NumVar name -> add_name name
243 | Ast.IdentVar name -> add_name name
244 | Ast.TermVar (name,_) -> add_name name
245 | Ast.FreshVar _ -> ()
246 | Ast.Ascription _ -> assert false
247 and aux_magic = function
248 | Ast.Default (t1, t2)
249 | Ast.Fold (_, t1, _, t2) ->
252 | Ast.If (t1, t2, t3) ->
262 let rectangular matrix =
263 let columns = Array.length matrix.(0) in
265 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
270 let matrix = Array.of_list (List.map Array.of_list ll) in
271 assert (rectangular matrix);
272 let rows = Array.length matrix in
273 let columns = Array.length matrix.(0) in
274 let lists = ref [] in
275 for j = 0 to columns - 1 do
277 for i = 0 to rows - 1 do
278 l := matrix.(i).(j) :: !l
280 lists := List.rev !l :: !lists
284 let string_of_literal = function
289 let boxify = function
291 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
293 let unboxify = function
294 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
299 | l -> Ast.Layout (Ast.Group l)
305 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
306 | term :: terms -> aux (term :: acc) terms
310 let dress ~sep:sauce =
315 | hd :: tl -> hd :: sauce :: aux tl
319 let dressn ~sep:sauces =
324 | hd :: tl -> hd :: sauces @ aux tl
328 let find_appl_pattern_uris ap =
331 | Ast.UriPattern uri -> `Uri uri :: acc
332 | Ast.NRefPattern nref -> `NRef nref :: acc
333 | Ast.ImplicitPattern
334 | Ast.VarPattern _ -> acc
335 | Ast.ApplPattern apl -> List.fold_left aux acc apl
337 let uris = aux [] ap in
340 `Uri u1, `Uri u2 -> UriManager.compare u1 u2
341 | `NRef r1, `NRef r2 -> NReference.compare r1 r2
342 | `Uri _,`NRef _ -> -1
343 | `NRef _, `Uri _ -> 1
345 HExtlib.list_uniq (List.fast_sort cmp uris)
347 let rec find_branch =
349 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
350 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
353 let cic_name_of_name = function
354 | Ast.Ident ("_", None) -> Cic.Anonymous
355 | Ast.Ident (name, None) -> Cic.Name name
358 let name_of_cic_name =
359 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
360 (* ZACK why we used to generate dummy xrefs? *)
361 let add_dummy_xref t = t in
363 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
364 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
366 let fresh_index = ref ~-1
368 type notation_id = int
374 (* TODO ensure that names generated by fresh_var do not clash with user's *)
375 (* FG: "η" is not an identifier (it is rendered, but not be parsed) *)
376 let fresh_name () = "eta" ^ string_of_int (fresh_id ())
378 let rec freshen_term ?(index = ref 0) term =
379 let freshen_term = freshen_term ~index in
380 let fresh_instance () = incr index; !index in
381 let special_k = function
382 | Ast.AttributedTerm (attr, t) -> Ast.AttributedTerm (attr, freshen_term t)
383 | Ast.Layout l -> Ast.Layout (visit_layout freshen_term l)
384 | Ast.Magic m -> Ast.Magic (visit_magic freshen_term m)
385 | Ast.Variable v -> Ast.Variable (visit_variable freshen_term v)
386 | Ast.Literal _ as t -> t
390 | Ast.Symbol (s, instance) -> Ast.Symbol (s, fresh_instance ())
391 | Ast.Num (s, instance) -> Ast.Num (s, fresh_instance ())
392 | t -> visit_ast ~special_k freshen_term t
394 let freshen_obj obj =
396 let freshen_term = freshen_term ~index in
397 let freshen_name_ty = List.map (fun (n, t) -> (n, freshen_term t)) in
398 let freshen_name_ty_b = List.map (fun (n,t,b,i) -> (n,freshen_term t,b,i)) in
399 let freshen_capture_variables =
400 List.map (fun (n,t) -> (freshen_term n, HExtlib.map_option freshen_term t))
403 | NotationPt.Inductive (params, indtypes) ->
406 (fun (n, co, ty, ctors) -> (n, co, ty, freshen_name_ty ctors))
409 NotationPt.Inductive (freshen_capture_variables params, indtypes)
410 | NotationPt.Theorem (flav, n, t, ty_opt,p) ->
412 match ty_opt with None -> None | Some ty -> Some (freshen_term ty)
414 NotationPt.Theorem (flav, n, freshen_term t, ty_opt,p)
415 | NotationPt.Record (params, n, ty, fields) ->
416 NotationPt.Record (freshen_capture_variables params, n,
417 freshen_term ty, freshen_name_ty_b fields)
419 let freshen_term = freshen_term ?index:None