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.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 module Ast = CicNotationPt
28 let visit_ast ?(special_k = fun _ -> assert false) k =
29 let rec aux = function
30 | Ast.Appl terms -> Ast.Appl (List.map k terms)
31 | Ast.Binder (kind, var, body) ->
32 Ast.Binder (kind, aux_capture_variable var, k body)
33 | Ast.Case (term, indtype, typ, patterns) ->
34 Ast.Case (k term, indtype, aux_opt typ, aux_patterns patterns)
35 | Ast.Cast (t1, t2) -> Ast.Cast (k t1, k t2)
36 | Ast.LetIn (var, t1, t2) ->
37 Ast.LetIn (aux_capture_variable var, k t1, k t2)
38 | Ast.LetRec (kind, definitions, term) ->
41 (fun (var, ty, n) -> aux_capture_variable var, k ty, n)
44 Ast.LetRec (kind, definitions, k term)
45 | Ast.Ident (name, Some substs) ->
46 Ast.Ident (name, Some (aux_substs substs))
47 | Ast.Uri (name, Some substs) -> Ast.Uri (name, Some (aux_substs substs))
48 | Ast.Meta (index, substs) -> Ast.Meta (index, List.map aux_opt substs)
49 | (Ast.AttributedTerm _
53 | Ast.Variable _) as t -> special_k t
60 | Ast.UserInput) as t -> t
61 and aux_opt = function
63 | Some term -> Some (k term)
64 and aux_capture_variable (term, typ_opt) = k term, aux_opt typ_opt
65 and aux_patterns patterns = List.map aux_pattern patterns
66 and aux_pattern ((head, vars), term) =
67 ((head, List.map aux_capture_variable vars), k term)
68 and aux_subst (name, term) = (name, k term)
69 and aux_substs substs = List.map aux_subst substs
73 let visit_layout k = function
74 | Ast.Sub (t1, t2) -> Ast.Sub (k t1, k t2)
75 | Ast.Sup (t1, t2) -> Ast.Sup (k t1, k t2)
76 | Ast.Below (t1, t2) -> Ast.Below (k t1, k t2)
77 | Ast.Above (t1, t2) -> Ast.Above (k t1, k t2)
78 | Ast.Over (t1, t2) -> Ast.Over (k t1, k t2)
79 | Ast.Atop (t1, t2) -> Ast.Atop (k t1, k t2)
80 | Ast.Frac (t1, t2) -> Ast.Frac (k t1, k t2)
81 | Ast.Sqrt t -> Ast.Sqrt (k t)
82 | Ast.Root (arg, index) -> Ast.Root (k arg, k index)
83 | Ast.Break -> Ast.Break
84 | Ast.Box (kind, terms) -> Ast.Box (kind, List.map k terms)
85 | Ast.Group terms -> Ast.Group (List.map k terms)
87 let visit_magic k = function
88 | Ast.List0 (t, l) -> Ast.List0 (k t, l)
89 | Ast.List1 (t, l) -> Ast.List1 (k t, l)
90 | Ast.Opt t -> Ast.Opt (k t)
91 | Ast.Fold (kind, t1, names, t2) -> Ast.Fold (kind, k t1, names, k t2)
92 | Ast.Default (t1, t2) -> Ast.Default (k t1, k t2)
93 | Ast.If (t1, t2, t3) -> Ast.If (k t1, k t2, k t3)
94 | Ast.Fail -> Ast.Fail
96 let variables_of_term t =
97 let rec vars = ref [] in
99 if List.mem v !vars then ()
100 else vars := v :: !vars
102 let rec aux = function
103 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
104 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
105 | Ast.Variable v -> Ast.Variable (aux_variable v)
106 | Ast.Literal _ as t -> t
107 | Ast.AttributedTerm (_, t) -> aux t
108 | t -> visit_ast aux t
109 and aux_variable = function
112 | Ast.TermVar _) as t ->
115 | Ast.FreshVar _ as t -> t
116 | Ast.Ascription _ -> assert false
121 let names_of_term t =
128 List.map aux (variables_of_term t)
130 let keywords_of_term t =
131 let rec keywords = ref [] in
132 let add_keyword k = keywords := k :: !keywords in
133 let rec aux = function
134 | Ast.AttributedTerm (_, t) -> aux t
135 | Ast.Layout l -> Ast.Layout (visit_layout aux l)
136 | Ast.Literal (`Keyword k) as t ->
139 | Ast.Literal _ as t -> t
140 | Ast.Magic m -> Ast.Magic (visit_magic aux m)
141 | Ast.Variable _ as v -> v
142 | t -> visit_ast aux t
147 let rec strip_attributes t =
148 let special_k = function
149 | Ast.AttributedTerm (_, term) -> strip_attributes term
150 | Ast.Magic m -> Ast.Magic (visit_magic strip_attributes m)
151 | Ast.Variable _ as t -> t
154 visit_ast ~special_k strip_attributes t
156 let meta_names_of_term term =
157 let rec names = ref [] in
159 if List.mem n !names then ()
160 else names := n :: !names
162 let rec aux = function
163 | Ast.AttributedTerm (_, term) -> aux term
164 | Ast.Appl terms -> List.iter aux terms
165 | Ast.Binder (_, _, body) -> aux body
166 | Ast.Case (term, indty, outty_opt, patterns) ->
169 List.iter aux_branch patterns
170 | Ast.LetIn (_, t1, t2) ->
173 | Ast.LetRec (_, definitions, body) ->
174 List.iter aux_definition definitions ;
176 | Ast.Uri (_, Some substs) -> aux_substs substs
177 | Ast.Ident (_, Some substs) -> aux_substs substs
178 | Ast.Meta (_, substs) -> aux_meta_substs substs
186 | Ast.UserInput -> ()
188 | Ast.Magic magic -> aux_magic magic
189 | Ast.Variable var -> aux_variable var
192 and aux_opt = function
193 | Some term -> aux term
195 and aux_capture_var (_, ty_opt) = aux_opt ty_opt
196 and aux_branch (pattern, term) =
197 aux_pattern pattern ;
199 and aux_pattern (head, vars) =
200 List.iter aux_capture_var vars
201 and aux_definition (var, term, i) =
202 aux_capture_var var ;
204 and aux_substs substs = List.iter (fun (_, term) -> aux term) substs
205 and aux_meta_substs meta_substs = List.iter aux_opt meta_substs
206 and aux_variable = function
207 | Ast.NumVar name -> add_name name
208 | Ast.IdentVar name -> add_name name
209 | Ast.TermVar name -> add_name name
210 | Ast.FreshVar _ -> ()
211 | Ast.Ascription _ -> assert false
212 and aux_magic = function
213 | Ast.Default (t1, t2)
214 | Ast.Fold (_, t1, _, t2) ->
217 | Ast.If (t1, t2, t3) ->
227 let rectangular matrix =
228 let columns = Array.length matrix.(0) in
230 Array.iter (fun a -> if Array.length a <> columns then raise Exit) matrix;
235 let matrix = Array.of_list (List.map Array.of_list ll) in
236 assert (rectangular matrix);
237 let rows = Array.length matrix in
238 let columns = Array.length matrix.(0) in
239 let lists = ref [] in
240 for j = 0 to columns - 1 do
242 for i = 0 to rows - 1 do
243 l := matrix.(i).(j) :: !l
245 lists := List.rev !l :: !lists
249 let string_of_literal = function
254 let boxify = function
256 | l -> Ast.Layout (Ast.Box ((Ast.H, false, false), l))
258 let unboxify = function
259 | Ast.Layout (Ast.Box ((Ast.H, false, false), [ a ])) -> a
264 | l -> Ast.Layout (Ast.Group l)
270 | Ast.Layout (Ast.Group terms) :: terms' -> aux acc (terms @ terms')
271 | term :: terms -> aux (term :: acc) terms
275 let dress ~sep:sauce =
280 | hd :: tl -> hd :: sauce :: aux tl
284 let dressn ~sep:sauces =
289 | hd :: tl -> hd :: sauces @ aux tl
293 let find_appl_pattern_uris ap =
296 | Ast.UriPattern uri ->
298 ignore (List.find (fun uri' -> UriManager.eq uri uri') acc);
300 with Not_found -> uri :: acc)
301 | Ast.ImplicitPattern
302 | Ast.VarPattern _ -> acc
303 | Ast.ApplPattern apl -> List.fold_left aux acc apl
307 let rec find_branch =
309 Ast.Magic (Ast.If (_, Ast.Magic Ast.Fail, t)) -> find_branch t
310 | Ast.Magic (Ast.If (_, t, _)) -> find_branch t
313 let cic_name_of_name = function
314 | Ast.Ident ("_", None) -> Cic.Anonymous
315 | Ast.Ident (name, None) -> Cic.Name name
318 let name_of_cic_name =
319 (* let add_dummy_xref t = Ast.AttributedTerm (`IdRef "", t) in *)
320 (* ZACK why we used to generate dummy xrefs? *)
321 let add_dummy_xref t = t in
323 | Cic.Name s -> add_dummy_xref (Ast.Ident (s, None))
324 | Cic.Anonymous -> add_dummy_xref (Ast.Ident ("_", None))
326 let fresh_index = ref ~-1
328 type notation_id = int
334 (* TODO ensure that names generated by fresh_var do not clash with user's *)
335 let fresh_name () = "fresh" ^ string_of_int (fresh_id ())