From 503d873ce22e1dd6bfda44c85322d4ee5a792a98 Mon Sep 17 00:00:00 2001
From: Stefano Zacchiroli <zack@upsilon.cc>
Date: Wed, 20 Oct 2004 10:31:37 +0000
Subject: [PATCH] top level query module

---
 helm/ocaml/tactics/metadataQuery.ml  | 103 +++++++++++++++++++++++++++
 helm/ocaml/tactics/metadataQuery.mli |  37 ++++++++++
 2 files changed, 140 insertions(+)
 create mode 100644 helm/ocaml/tactics/metadataQuery.ml
 create mode 100644 helm/ocaml/tactics/metadataQuery.mli

diff --git a/helm/ocaml/tactics/metadataQuery.ml b/helm/ocaml/tactics/metadataQuery.ml
new file mode 100644
index 000000000..18ea81381
--- /dev/null
+++ b/helm/ocaml/tactics/metadataQuery.ml
@@ -0,0 +1,103 @@
+(* Copyright (C) 2004, 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/
+ *)
+
+open Printf
+
+module Constr = MetadataConstraints
+
+let locate ~(dbh:Dbi.connection) name =
+  let query =
+    dbh#prepare (sprintf "SELECT value FROM %s WHERE source = \"%s\""
+      MetadataTypes.name_tbl name)
+  in
+  query#execute [];
+  List.map (function [`String s] -> s | _ -> assert false) (query#fetchall ())
+
+let match_term ~(dbh:Dbi.connection) ty =
+  let metadata = MetadataExtractor.compute ~body:None ~ty in
+  Constr.at_least ~dbh metadata
+
+let nonvar (_, s) =
+  let len = String.length s in
+  let suffix = String.sub s (len-4) 4 in
+  not (suffix  = ".var")
+
+let ( ** ) x y = int_of_float ((float_of_int x) ** (float_of_int y))
+
+let signature_of_hypothesis context =
+  List.fold_left
+    (fun set hyp ->
+      match hyp with
+      | None -> set
+      | Some (_, Cic.Decl t)
+      | Some (_, Cic.Def (t, _)) ->
+          Constr.StringSet.union set (Constr.constants_of t))
+    Constr.StringSet.empty context
+
+let hint ~(dbh:Dbi.connection) ?signature ((proof, goal) as status) =
+  let (_, metasenv, _, _) = proof in
+  let (_, context, ty) = CicUtil.lookup_meta goal metasenv in
+  let (uris, (main, sig_constants)) =
+    match signature with
+    | Some signature -> (Constr.sigmatch ~dbh signature, signature)
+    | None -> (Constr.cmatch' ~dbh ty, Constr.signature_of ty)
+  in
+  let uris = List.filter nonvar uris in
+(*
+  let concl_constants =
+    match main with
+    | None -> sig_constants
+    | Some (main, types) ->
+        List.fold_right Constr.StringSet.add sig_constants (main :: types)
+  in
+*)
+  let types_constants =
+    match main with
+    | None -> Constr.StringSet.empty
+    | Some (main, types) ->
+        List.fold_right Constr.StringSet.add (main :: types)
+          Constr.StringSet.empty
+  in
+  let hyp_constants =
+    Constr.StringSet.diff (signature_of_hypothesis context) types_constants
+  in
+  let other_constants = Constr.StringSet.union sig_constants hyp_constants in
+  let uris = 
+    if (List.length uris < 2 ** (Constr.StringSet.cardinal other_constants))
+    then begin
+      prerr_endline
+        "MetadataQuery: large signature, falling back to old method";
+      List.filter (Filter_auto.filter_new_constants ~dbh all_constants main)
+        uris
+    end else
+      Filter_auto.filter_uris ~dbh all_constants uris main
+  in
+  List.map
+    (fun uri ->
+      (uri,
+       ProofEngineTypes.apply_tactic
+        (PrimitiveTactics.apply_tac ~term:(CicUtil.term_of_uri uri))
+        status))
+
diff --git a/helm/ocaml/tactics/metadataQuery.mli b/helm/ocaml/tactics/metadataQuery.mli
new file mode 100644
index 000000000..6bea094a4
--- /dev/null
+++ b/helm/ocaml/tactics/metadataQuery.mli
@@ -0,0 +1,37 @@
+(* Copyright (C) 2004, 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/
+ *)
+
+val locate: dbh:Dbi.connection -> string -> string list
+
+val hint:
+  dbh:Dbi.connection ->
+  ?signature:MetadataConstraints.term_signature ->
+  ProofEngineTypes.status ->
+    (string * (ProofEngineTypes.proof * ProofEngineTypes.goal list)) list
+
+val match_term: dbh:Dbi.connection -> Cic.term -> string list
+
+(* val elim: dbh:Dbi.connection -> string -> string list *)
+
-- 
2.39.2