--- /dev/null
+(* Copyright (C) 2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+open Printf
+
+module Ast = CicNotationPt
+module Obj = LibraryObjects
+
+let debug = false
+let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
+
+type interpretation_id = int
+
+let idref id t = Ast.AttributedTerm (`IdRef id, t)
+
+type term_info =
+ { sort: (Cic.id, Ast.sort_kind) Hashtbl.t;
+ uri: (Cic.id, UriManager.uri) Hashtbl.t;
+ }
+
+let destroy_nat annterm =
+ let is_zero = function
+ | Cic.AMutConstruct (_, uri, 0, 1, _) when Obj.is_nat_URI uri -> true
+ | _ -> false
+ in
+ let is_succ = function
+ | Cic.AMutConstruct (_, uri, 0, 2, _) when Obj.is_nat_URI uri -> true
+ | _ -> false
+ in
+ let rec aux acc = function
+ | Cic.AAppl (_, [he ; tl]) when is_succ he -> aux (acc + 1) tl
+ | t when is_zero t -> Some acc
+ | _ -> None in
+ aux 0 annterm
+
+ (* persistent state *)
+
+let initial_level2_patterns32 () = Hashtbl.create 211
+let initial_interpretations () = Hashtbl.create 211
+
+let level2_patterns32 = ref (initial_level2_patterns32 ())
+(* symb -> id list ref *)
+let interpretations = ref (initial_interpretations ())
+let pattern32_matrix = ref []
+let counter = ref ~-1
+let find_level2_patterns32 pid = Hashtbl.find !level2_patterns32 pid;;
+
+let stack = ref []
+
+let push () =
+ stack := (!counter,!level2_patterns32,!interpretations,!pattern32_matrix)::!stack;
+ counter := ~-1;
+ level2_patterns32 := initial_level2_patterns32 ();
+ interpretations := initial_interpretations ();
+ pattern32_matrix := []
+;;
+
+let pop () =
+ match !stack with
+ [] -> assert false
+ | (ocounter,olevel2_patterns32,ointerpretations,opattern32_matrix)::old ->
+ stack := old;
+ counter := ocounter;
+ level2_patterns32 := olevel2_patterns32;
+ interpretations := ointerpretations;
+ pattern32_matrix := opattern32_matrix
+;;
+
+let add_idrefs =
+ List.fold_right (fun idref t -> Ast.AttributedTerm (`IdRef idref, t))
+
+let instantiate32 term_info idrefs env symbol args =
+ let rec instantiate_arg = function
+ | Ast.IdentArg (n, name) ->
+ let t =
+ try List.assoc name env
+ with Not_found -> prerr_endline ("name not found in env: "^name);
+ assert false
+ in
+ let rec count_lambda = function
+ | Ast.AttributedTerm (_, t) -> count_lambda t
+ | Ast.Binder (`Lambda, _, body) -> 1 + count_lambda body
+ | _ -> 0
+ in
+ let rec add_lambda t n =
+ if n > 0 then
+ let name = CicNotationUtil.fresh_name () in
+ Ast.Binder (`Lambda, (Ast.Ident (name, None), None),
+ Ast.Appl [add_lambda t (n - 1); Ast.Ident (name, None)])
+ else
+ t
+ in
+ add_lambda t (n - count_lambda t)
+ in
+ let head =
+ let symbol = Ast.Symbol (symbol, 0) in
+ add_idrefs idrefs symbol
+ in
+ if args = [] then head
+ else Ast.Appl (head :: List.map instantiate_arg args)
+
+let load_patterns32s = ref [];;
+
+let add_load_patterns32 f = load_patterns32s := f :: !load_patterns32s;;
+let fresh_id =
+ fun () ->
+ incr counter;
+ !counter
+
+let add_interpretation dsc (symbol, args) appl_pattern =
+ let id = fresh_id () in
+ Hashtbl.add !level2_patterns32 id (dsc, symbol, args, appl_pattern);
+ pattern32_matrix := (true, appl_pattern, id) :: !pattern32_matrix;
+ List.iter (fun f -> f !pattern32_matrix) !load_patterns32s;
+ (try
+ let ids = Hashtbl.find !interpretations symbol in
+ ids := id :: !ids
+ with Not_found -> Hashtbl.add !interpretations symbol (ref [id]));
+ id
+
+let get_all_interpretations () =
+ List.map
+ (function (_, _, id) ->
+ let (dsc, _, _, _) =
+ try
+ Hashtbl.find !level2_patterns32 id
+ with Not_found -> assert false
+ in
+ (id, dsc))
+ !pattern32_matrix
+
+let get_active_interpretations () =
+ HExtlib.filter_map (function (true, _, id) -> Some id | _ -> None)
+ !pattern32_matrix
+
+let set_active_interpretations ids =
+ let pattern32_matrix' =
+ List.map
+ (function
+ | (_, ap, id) when List.mem id ids -> (true, ap, id)
+ | (_, ap, id) -> (false, ap, id))
+ !pattern32_matrix
+ in
+ pattern32_matrix := pattern32_matrix';
+ List.iter (fun f -> f !pattern32_matrix) !load_patterns32s
+
+exception Interpretation_not_found
+
+let lookup_interpretations ?(sorted=true) symbol =
+ try
+ let raw =
+ List.map (
+ fun id ->
+ let (dsc, _, args, appl_pattern) =
+ try
+ Hashtbl.find !level2_patterns32 id
+ with Not_found -> assert false
+ in
+ dsc, args, appl_pattern
+ )
+ !(Hashtbl.find !interpretations symbol)
+ in
+ if sorted then HExtlib.list_uniq (List.sort Pervasives.compare raw)
+ else raw
+ with Not_found -> raise Interpretation_not_found
+
+let remove_interpretation id =
+ (try
+ let dsc, symbol, _, _ = Hashtbl.find !level2_patterns32 id in
+ let ids = Hashtbl.find !interpretations symbol in
+ ids := List.filter ((<>) id) !ids;
+ Hashtbl.remove !level2_patterns32 id;
+ with Not_found -> raise Interpretation_not_found);
+ pattern32_matrix :=
+ List.filter (fun (_, _, id') -> id <> id') !pattern32_matrix;
+ List.iter (fun f -> f !pattern32_matrix) !load_patterns32s
+
+let init () = List.iter (fun f -> f []) !load_patterns32s
+
+let instantiate_appl_pattern
+ ~mk_appl ~mk_implicit ~term_of_uri ~term_of_nref env appl_pattern
+=
+ let lookup name =
+ try List.assoc name env
+ with Not_found ->
+ prerr_endline (sprintf "Name %s not found" name);
+ assert false
+ in
+ let rec aux = function
+ | Ast.UriPattern uri -> term_of_uri uri
+ | Ast.NRefPattern nref -> term_of_nref nref
+ | Ast.ImplicitPattern -> mk_implicit false
+ | Ast.VarPattern name -> lookup name
+ | Ast.ApplPattern terms -> mk_appl (List.map aux terms)
+ in
+ aux appl_pattern
+
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