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(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*i $Id$ *)
Require Datatypes.
Require Peano.
Syntax constr
level 0:
S [ (S $p) ] -> [$p:"nat_printer":9]
| O [ O ] -> ["(0)"].
(* Outside the module to be able to parse the grammar for 0,1,2... !! *)
Delimits Scope nat_scope with N.
(* For parsing/printing based on scopes *)
Module nat_scope.
Infix "+" plus (at level 4) : nat_scope.
Infix "*" mult (at level 3): nat_scope.
Infix "<=" le (at level 5, no associativity) : nat_scope.
Infix "<" lt (at level 5, no associativity) : nat_scope.
Infix ">=" ge (at level 5, no associativity) : nat_scope.
Infix ">" gt (at level 5, no associativity) : nat_scope.
(* Warning: this hides sum and prod and breaks sumor symbolic notation *)
Open Scope nat_scope.
(*
Syntax constr
level 0:
S' [ (S $p) ] -> [$p:"nat_printer_S":9]
| O' [ O ] -> [ _:"nat_printer_O" ]
.
*)
End nat_scope.
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