From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Fri, 10 Jun 2005 12:54:44 +0000 (+0000)
Subject: Complete unsharing of terms.
X-Git-Tag: PRE_STORAGE~84
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=e02f1fb84607becbaa86fe475a63be970a838286;p=helm.git

Complete unsharing of terms.
---

diff --git a/helm/ocaml/cic/unshare.ml b/helm/ocaml/cic/unshare.ml
new file mode 100644
index 000000000..10f4f3df4
--- /dev/null
+++ b/helm/ocaml/cic/unshare.ml
@@ -0,0 +1,84 @@
+(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
+ *)
+
+let rec unshare =
+ let module C = Cic in
+  function
+     C.Rel m -> C.Rel m
+   | C.Var (uri,exp_named_subst) ->
+      let exp_named_subst' = 
+       List.map (function (uri,t) -> (uri,unshare t)) exp_named_subst
+      in
+       C.Var (uri,exp_named_subst')
+   | C.Meta (i,l) ->
+      let l' =
+       List.map
+        (function
+            None -> None
+          | Some t -> Some (unshare t)
+        ) l
+      in
+       C.Meta(i,l')
+   | C.Sort _ as t -> t
+   | C.Implicit _ as t -> t
+   | C.Cast (te,ty) -> C.Cast (unshare te, unshare ty)
+   | C.Prod (n,s,t) -> C.Prod (n, unshare s, unshare t)
+   | C.Lambda (n,s,t) -> C.Lambda (n, unshare s, unshare t)
+   | C.LetIn (n,s,t) -> C.LetIn (n, unshare s, unshare t)
+   | C.Appl l -> C.Appl (List.map unshare l)
+   | C.Const (uri,exp_named_subst) ->
+      let exp_named_subst' = 
+       List.map (function (uri,t) -> (uri,unshare t)) exp_named_subst
+      in
+       C.Const (uri,exp_named_subst')
+   | C.MutInd (uri,tyno,exp_named_subst) ->
+      let exp_named_subst' = 
+       List.map (function (uri,t) -> (uri,unshare t)) exp_named_subst
+      in
+       C.MutInd (uri,tyno,exp_named_subst')
+   | C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
+      let exp_named_subst' = 
+       List.map (function (uri,t) -> (uri,unshare t)) exp_named_subst
+      in
+       C.MutConstruct (uri,tyno,consno,exp_named_subst')
+   | C.MutCase (sp,i,outty,t,pl) ->
+      C.MutCase (sp, i, unshare outty, unshare t,
+       List.map unshare pl)
+   | C.Fix (i, fl) ->
+      let len = List.length fl in
+      let liftedfl =
+       List.map
+        (fun (name, i, ty, bo) -> (name, i, unshare ty, unshare bo))
+         fl
+      in
+       C.Fix (i, liftedfl)
+   | C.CoFix (i, fl) ->
+      let len = List.length fl in
+      let liftedfl =
+       List.map
+        (fun (name, ty, bo) -> (name, unshare ty, unshare bo))
+         fl
+      in
+       C.CoFix (i, liftedfl)
diff --git a/helm/ocaml/cic/unshare.mli b/helm/ocaml/cic/unshare.mli
new file mode 100644
index 000000000..5582abcbf
--- /dev/null
+++ b/helm/ocaml/cic/unshare.mli
@@ -0,0 +1,26 @@
+(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
+ *)
+
+val unshare : Cic.term -> Cic.term