From 9b6600b6ebde837548d46c6c1879ff9d37f56194 Mon Sep 17 00:00:00 2001
From: Andrea Asperti <andrea.asperti@unibo.it>
Date: Mon, 11 Jan 2010 11:21:58 +0000
Subject: [PATCH] Added is_equation

---
 .../ng_paramodulation/nCicParamod.ml          | 35 ++++++++++++++++++-
 .../ng_paramodulation/nCicParamod.mli         |  8 +++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/helm/software/components/ng_paramodulation/nCicParamod.ml b/helm/software/components/ng_paramodulation/nCicParamod.ml
index fad1aa411..739e76f05 100644
--- a/helm/software/components/ng_paramodulation/nCicParamod.ml
+++ b/helm/software/components/ng_paramodulation/nCicParamod.ml
@@ -95,6 +95,7 @@ module EmptyC =
     let context = []
   end
 
+module CB = NCicBlob.NCicBlob(EmptyC)
 module P = NCicParamod(EmptyC)
 
 type state = P.state
@@ -105,7 +106,7 @@ let forward_infer_step s t ty =
   let bag,clause = P.mk_passive bag (t,ty) in
     if Terms.is_eq_clause clause then
       P.forward_infer_step (P.replace_bag s bag) clause 0
-    else s
+    else (prerr_endline "not eq"; s)
 ;;
 
 let index_obj s uri =
@@ -117,6 +118,17 @@ let index_obj s uri =
     | _ -> s
 ;;
 
+let paramod rdb metasenv subst context s goal =
+  (* let stamp = Unix.gettimeofday () in *)
+  match P.nparamod ~useage:true ~max_steps:max_int 
+    ~timeout:(Unix.gettimeofday () +. 300.0) s goal with
+  | P.Error _ | P.GaveUp | P.Timeout _ -> []
+  | P.Unsatisfiable solutions -> 
+      (* print (lazy (Printf.sprintf "Got solutions in %fs"
+		     (Unix.gettimeofday() -. stamp))); *)
+      List.map (readback rdb metasenv subst context) solutions
+;;
+
 let fast_eq_check rdb metasenv subst context s goal =
   (* let stamp = Unix.gettimeofday () in *)
   match P.fast_eq_check s goal with
@@ -127,3 +139,24 @@ let fast_eq_check rdb metasenv subst context s goal =
       List.map (readback rdb metasenv subst context) solutions
 ;;
 
+let is_equation metasenv subst context ty =
+  let hty, _, _ = 
+    NCicMetaSubst.saturate ~delta:0 metasenv subst context
+      ty 0 
+  in match hty with
+    | NCic.Appl (eq ::tl) when eq = CB.eqP -> true
+    | _ -> false
+;;
+
+
+(*
+let demodulate rdb metasenv subst context s goal =
+  (* let stamp = Unix.gettimeofday () in *)
+  match P.fast_eq_check s goal with
+  | P.Error _ | P.GaveUp | P.Timeout _ -> []
+  | P.Unsatisfiable solutions -> 
+      (* print (lazy (Printf.sprintf "Got solutions in %fs"
+		     (Unix.gettimeofday() -. stamp))); *)
+      List.map (readback rdb metasenv subst context) solutions
+;;
+*)
diff --git a/helm/software/components/ng_paramodulation/nCicParamod.mli b/helm/software/components/ng_paramodulation/nCicParamod.mli
index a0f5265ee..3c813a075 100644
--- a/helm/software/components/ng_paramodulation/nCicParamod.mli
+++ b/helm/software/components/ng_paramodulation/nCicParamod.mli
@@ -21,6 +21,14 @@ type state
 val empty_state: state
 val forward_infer_step: state -> NCic.term -> NCic.term -> state
 val index_obj: state -> NUri.uri -> state
+val is_equation: NCic.metasenv ->
+           NCic.substitution -> NCic.context -> NCic.term -> bool
+val paramod : 
+  #NRstatus.status ->
+  NCic.metasenv -> NCic.substitution -> NCic.context ->
+  state -> 
+  (NCic.term * NCic.term) -> 
+  (NCic.term * NCic.term * NCic.metasenv * NCic.substitution) list
 val fast_eq_check : 
   #NRstatus.status ->
   NCic.metasenv -> NCic.substitution -> NCic.context ->
-- 
2.39.2