Directory 'contrib' renamed into 'plugins', to end confusion with archive of user contribs

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11996 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 21 insertions, 0 deletions

diff --git a/plugins/setoid_ring/NArithRing.v b/plugins/setoid_ring/NArithRing.v
new file mode 100644
index 000000000..0ba519fde
--- /dev/null
+++ b/plugins/setoid_ring/NArithRing.v
@@ -0,0 +1,21 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+Require Export Ring.
+Require Import BinPos BinNat.
+Import InitialRing.
+
+Set Implicit Arguments.
+
+Ltac Ncst t :=
+  match isNcst t with
+    true => t
+  | _ => constr:NotConstant
+  end.
+
+Add Ring Nr : Nth (decidable Neq_bool_ok, constants [Ncst]).