From ef5e2e1726e24e4523ee28ead5d7796498192692 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Tue, 27 Jun 2006 16:52:45 +0000
Subject: [PATCH] fixed equalities_for_goal

---
 components/tactics/metadataQuery.ml  | 76 ++++++++++++++++++++++------
 components/tactics/metadataQuery.mli |  4 +-
 2 files changed, 63 insertions(+), 17 deletions(-)

diff --git a/components/tactics/metadataQuery.ml b/components/tactics/metadataQuery.ml
index 8822c527c..a5c387971 100644
--- a/components/tactics/metadataQuery.ml
+++ b/components/tactics/metadataQuery.ml
@@ -38,15 +38,35 @@ let debug_print s = if debug then prerr_endline (Lazy.force s)
 
 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.UriManagerSet.union set (Constr.constants_of t))
-    Constr.UriManagerSet.empty context
+let signature_of_hypothesis context metasenv =
+  let set, _ =
+    List.fold_right
+      (fun hyp (set,current_ctx) ->
+        match hyp with
+        | None -> set, hyp::current_ctx
+        | Some (_, Cic.Decl t) -> 
+            Constr.UriManagerSet.union set (Constr.constants_of t),
+            hyp::current_ctx
+        | Some (_, Cic.Def (t, _)) ->
+            try 
+              let ty,_ = 
+                CicTypeChecker.type_of_aux' 
+                  metasenv current_ctx t CicUniv.empty_ugraph 
+              in
+              let sort,_ = 
+                CicTypeChecker.type_of_aux' 
+                  metasenv current_ctx ty CicUniv.empty_ugraph 
+              in
+              match sort with
+              | Cic.Sort Cic.Prop -> set, hyp::current_ctx
+              | _ -> Constr.UriManagerSet.union set (Constr.constants_of t),
+                     hyp::current_ctx
+            with
+            | CicTypeChecker.TypeCheckerFailure _ -> set, hyp::current_ctx)
+      context (Constr.UriManagerSet.empty,[]) 
+  in
+  set
+;;
 
 let intersect uris siguris =
   let set1 = List.fold_right Constr.UriManagerSet.add uris Constr.UriManagerSet.empty in
@@ -176,7 +196,7 @@ let signature_of_goal ~(dbd:HMysql.dbd) ((proof, goal) as _status) =
  let (_, metasenv, _, _) = proof in
  let (_, context, ty) = CicUtil.lookup_meta goal metasenv in
  let main, sig_constants = Constr.signature_of ty in
- let set = signature_of_hypothesis context in
+ let set = signature_of_hypothesis context metasenv in
  let set =
   match main with
      None -> set
@@ -189,8 +209,26 @@ let signature_of_goal ~(dbd:HMysql.dbd) ((proof, goal) as _status) =
  let uris = List.filter nonvar (List.map snd uris) in
  let uris = List.filter Hashtbl_equiv.not_a_duplicate uris in
   uris
+;;
+
+let filter_predicate set ctx menv =
+  let is_predicate t = 
+    let ty, _ = 
+      try CicTypeChecker.type_of_aux' [] []
+        (CicUtil.term_of_uri t) CicUniv.empty_ugraph
+      with CicTypeChecker.TypeCheckerFailure _ -> assert false
+    in
+    let rec check_last_pi = function
+      | Cic.Prod (_,_,tgt) -> check_last_pi tgt
+      | Cic.Sort Cic.Prop -> true
+      | _ -> false
+    in
+    not (check_last_pi ty)
+  in
+  Constr.UriManagerSet.filter is_predicate set  
+;;
 
-let equations_for_goal ~(dbd:HMysql.dbd) ((proof, goal) as _status) =
+let equations_for_goal ~(dbd:HMysql.dbd) ?signature ((proof, goal) as _status) =
 (*   let to_string set =
     "{ " ^
       (String.concat ", "
@@ -200,7 +238,11 @@ let equations_for_goal ~(dbd:HMysql.dbd) ((proof, goal) as _status) =
   in *)
  let (_, metasenv, _, _) = proof in
  let (_, context, ty) = CicUtil.lookup_meta goal metasenv in
- let main, sig_constants = Constr.signature_of ty in
+ let main, sig_constants = 
+   match signature with 
+   | None -> Constr.signature_of ty 
+   | Some s -> s
+ in
 (*  Printf.printf "\nsig_constants: %s\n\n" (to_string sig_constants); *)
 (*  match main with *)
 (*      None -> raise Goal_is_not_an_equation *)
@@ -216,15 +258,17 @@ let equations_for_goal ~(dbd:HMysql.dbd) ((proof, goal) as _status) =
    in
    match eq_URI,main with
    | Some eq_URI, Some (m, l) when UriManager.eq m eq_URI -> m::l
-   | _,_ -> []
+   | _ -> []
  in
- Printf.printf "\nSome (m, l): %s, [%s]\n\n"
+ (*Printf.printf "\nSome (m, l): %s, [%s]\n\n"
    (UriManager.string_of_uri (List.hd l))
    (String.concat "; " (List.map UriManager.string_of_uri (List.tl l)));
+ *)
  (*        if m == UriManager.uri_of_string HelmLibraryObjects.Logic.eq_XURI then ( *)
- let set = signature_of_hypothesis context in
+ let set = signature_of_hypothesis context metasenv in
  (*          Printf.printf "\nsignature_of_hypothesis: %s\n\n" (to_string set); *)
  let set = Constr.UriManagerSet.union set sig_constants in
+ let set = filter_predicate set context metasenv in
  let set = close_with_types set metasenv context in
  (*          Printf.printf "\ndopo close_with_types: %s\n\n" (to_string set); *)
  let set = close_with_constructors set metasenv context in
@@ -261,7 +305,7 @@ let experimental_hint
   let all_constants =
     let hyp_and_sug =
       Constr.UriManagerSet.union
-        (signature_of_hypothesis context) 
+        (signature_of_hypothesis context metasenv) 
         sig_constants
     in
     let main = 
diff --git a/components/tactics/metadataQuery.mli b/components/tactics/metadataQuery.mli
index b65a23fa9..0fa4a01df 100644
--- a/components/tactics/metadataQuery.mli
+++ b/components/tactics/metadataQuery.mli
@@ -32,7 +32,9 @@ val signature_of_goal:
   dbd:HMysql.dbd -> ProofEngineTypes.status -> UriManager.uri list
 
 val equations_for_goal:
-  dbd:HMysql.dbd -> ProofEngineTypes.status -> UriManager.uri list
+  dbd:HMysql.dbd -> 
+  ?signature:MetadataConstraints.term_signature ->
+    ProofEngineTypes.status -> UriManager.uri list
 
 val experimental_hint:
   dbd:HMysql.dbd ->
-- 
2.39.2