remove test file NatSyntaxViaZ.v

1 files changed, 0 insertions, 57 deletions

diff --git a/plugins/syntax/NatSyntaxViaZ.v b/plugins/syntax/NatSyntaxViaZ.v
deleted file mode 100644
index 8a4d8f236d..0000000000
--- a/plugins/syntax/NatSyntaxViaZ.v
+++ /dev/null
@@ -1,57 +0,0 @@
-Declare ML Module "numeral_notation_plugin".
-Require Import BinNums.
-
-(** ** Parsing and Printing digit strings as type nat *)
-
-Fixpoint pos_pred_double x :=
-  match x with
-  | xI p => xI (xO p)
-  | xO p => xI (pos_pred_double p)
-  | xH => xH
-  end.
-
-Definition nat_of_Z x :=
-  match x with
-  | Z0 => Some O
-  | Zpos p =>
-      let fix iter p a :=
-        match p with
-        | xI p0 => a + iter p0 (a + a)
-        | xO p0 => iter p0 (a + a)
-        | xH => a
-        end
-      in
-      Some (iter p (S O))
-  | Zneg p => None
-  end.
-
-Fixpoint pos_succ x :=
-  match x with
-  | xI p => xO (pos_succ p)
-  | xO p => xI p
-  | xH => xO xH
-  end.
-
-Definition Z_succ x :=
-  match x with
-  | Z0 => Zpos xH
-  | Zpos x => Zpos (pos_succ x)
-  | Zneg x =>
-      match x with
-      | xI p => Zneg (xO p)
-      | xO p => Zneg (pos_pred_double p)
-      | xH => Z0
-      end
-  end.
-
-Fixpoint Z_of_nat n :=
-  match n with
-  | O => Z0
-  | S p => Z_succ (Z_of_nat p)
-  end.
-
-(** The 1st conversion must either have type [Z->nat] or [Z->option nat].
-  The 2nd one must either have type [nat->Z] or [nat->option Z]. *)
-
-Numeral Notation nat nat_of_Z Z_of_nat : nat_scope
-  (warning after 5000).