X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2FnCicBlob.ml;h=c1c7a9071fdee01ed9ad69959782f7e73886ad25;hb=12f96bd48b460d06f9858a334ee7c52d6831712f;hp=2ed7eef23b005efff510e2daa6a9619f9ea67d84;hpb=f7bfbdc706a75256c0e9b15ecc242175f562eb71;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/nCicBlob.ml b/helm/software/components/ng_paramodulation/nCicBlob.ml
index 2ed7eef23..c1c7a9071 100644
--- a/helm/software/components/ng_paramodulation/nCicBlob.ml
+++ b/helm/software/components/ng_paramodulation/nCicBlob.ml
@@ -11,6 +11,40 @@
 
 (* $Id: terms.mli 9822 2009-06-03 15:37:06Z tassi $ *)
 
+let eqPref = ref (fun _ -> assert false);;
+let set_eqP t = eqPref := fun _ -> t;;
+
+let default_eqP() = 
+  let uri = NUri.uri_of_string "cic:/matita/ng/Plogic/equality/eq.ind" in
+  let ref = NReference.reference_of_spec uri (NReference.Ind(true,0,2)) in
+    NCic.Const ref
+;;
+
+let equivalence_relation =
+  let uri = NUri.uri_of_string "cic:/matita/ng/properties/relations/eq_rel.con"
+  in
+  let ref = NReference.reference_of_spec uri (NReference.Fix(0,1,2)) 
+  in NCic.Const ref
+
+let setoid_eq =
+  let uri = NUri.uri_of_string "cic:/matita/ng/sets/setoids/eq.con" in
+  let ref = NReference.reference_of_spec uri (NReference.Fix(0,0,2)) 
+  in NCic.Const ref
+
+let set_default_eqP() = eqPref := default_eqP
+
+let set_reference_of_oxuri f = 
+  let eqnew = function 
+      _ -> 
+	let r = f(UriManager.uri_of_string 
+          "cic:/matita/logic/equality/eq.ind#xpointer(1/1)")
+	in
+	  NCic.Const r
+  in
+    eqPref := eqnew
+;;
+
+
 module type NCicContext =
   sig
     val metasenv : NCic.metasenv
@@ -23,13 +57,27 @@ with type t = NCic.term and type input = NCic.term = struct
 
   type t = NCic.term
 
-  let eq x y = NCicReduction.alpha_eq C.metasenv C.subst C.context x y;;
+  let eq x y = x = y;;
+    (* NCicReduction.alpha_eq C.metasenv C.subst C.context x y;; *)
+
+  let height_of_ref = function
+    | NReference.Def h -> h
+    | NReference.Fix(_,_,h) -> h
+    | _ -> 0
+
+  let compare_refs (NReference.Ref (u1,r1)) (NReference.Ref (u2,r2)) =
+    let x = height_of_ref r2 - height_of_ref r1 in
+      if x = 0 then 
+	Hashtbl.hash (NUri.string_of_uri u1,r1) - 
+	  Hashtbl.hash (NUri.string_of_uri u2,r2)
+      else x 
 
   let rec compare x y = 
     match x,y with
-    | NCic.Rel i, NCic.Rel j -> i-j
+    | NCic.Rel i, NCic.Rel j -> j-i
     | NCic.Meta (i,_), NCic.Meta (j,_) -> i-j
-    | NCic.Const r1, NCic.Const r2 -> NReference.compare r1 r2
+    | NCic.Const r1, NCic.Const r2 -> compare_refs r1 r2
+    (*NReference.compare r1 r2*)
     | NCic.Appl l1, NCic.Appl l2 -> FoUtils.lexicograph compare l1 l2
     | NCic.Rel _, ( NCic.Meta _ | NCic.Const _ | NCic.Appl _ ) -> ~-1
     | ( NCic.Meta _ | NCic.Const _ | NCic.Appl _ ), NCic.Rel _ -> 1
@@ -37,14 +85,29 @@ with type t = NCic.term and type input = NCic.term = struct
     | ( NCic.Meta _ | NCic.Appl _ ), NCic.Const _ -> 1
     | NCic.Appl _, NCic.Meta _ -> ~-1
     | NCic.Meta _, NCic.Appl _ -> 1
-    | _ -> assert false
+    | _ -> Pervasives.compare x y
+	(* was assert false, but why? *)
+	
   ;;
   
   let compare x y = 
-    if NCicReduction.alpha_eq C.metasenv C.subst C.context x y then 0 
+    (* if NCicReduction.alpha_eq C.metasenv C.subst C.context x y  then 0 *)
+    if x = y  then 0
     else compare x y
   ;;
 
+  let eqP = (!eqPref)()
+  ;;
+
+  let is_eq = function
+    | Terms.Node [ Terms.Leaf eqt ; ty; l; r ] when eq eqP eqt ->
+        Some (ty,l,r) 
+(*
+    | Terms.Node [ Terms.Leaf eqt ; _; Terms.Node [Terms.Leaf eqt2 ; ty]; l; r]
+	when eq equivalence_relation eqt && eq setoid_eq eqt2 ->
+        Some (ty,l,r) *)
+    | _ -> None
+
   let pp t = 
     NCicPp.ppterm ~context:C.context ~metasenv:C.metasenv ~subst:C.subst t;;
 
@@ -67,7 +130,7 @@ with type t = NCic.term and type input = NCic.term = struct
 
   let saturate t ty = 
     let sty, _, args = 
-      NCicMetaSubst.saturate ~delta:max_int C.metasenv C.subst C.context
+      NCicMetaSubst.saturate ~delta:0 C.metasenv C.subst C.context
         ty 0
     in
     let proof = 
@@ -77,14 +140,5 @@ with type t = NCic.term and type input = NCic.term = struct
     let sty = embed sty in
     proof, sty
   ;;
-
-  let eqP = 
-    let r = 
-      OCic2NCic.reference_of_oxuri 
-       (UriManager.uri_of_string 
-         "cic:/matita/logic/equality/eq.ind#xpointer(1/1)")
-    in
-    NCic.Const r
-  ;;
-
+  
  end