helm/software/matita/contribs/procedural/Coq/Num/Nat/NSyntax.mma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
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  11 (*        v         GNU General Public License Version 2                  *)
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  13 (**************************************************************************)
  14
  15 (* This file was automatically generated: do not edit *********************)
  16
  17 include "Coq.ma".
  18
  19 (*s Syntax for arithmetic *)
  20
  21 (* NOTATION
  22 Infix 6 "<" lt.
  23 *)
  24
  25 (* NOTATION
  26 Infix 6 "<=" le.
  27 *)
  28
  29 (* NOTATION
  30 Infix 6 ">" gt.
  31 *)
  32
  33 (* NOTATION
  34 Infix 6 ">=" ge.
  35 *)
  36
  37 (*i Infix 7 "+" plus. i*)
  38
  39 (* NOTATION
  40 Grammar constr lassoc_constr4 :=
  41   squash_sum
  42   [ lassoc_constr4($c1) "+" lassoc_constr4($c2) ] ->
  43       case [$c2] of
  44         (SQUASH $T2) ->
  45             case [$c1] of
  46               (SQUASH $T1) -> [ (sumbool $T1 $T2) ] (* {T1}+{T2} *)
  47             | $_           -> [ (sumor $c1 $T2) ]   (* c1+{T2} *)
  48             esac
  49       | $_           -> [ (add $c1 $c2) ]           (* c1+c2 *)
  50       esac.
  51 *)
  52
  53 (* NOTATION
  54 Syntax constr
  55   level 4:
  56     sum [ (add $t1 $t2) ] -> [ [<hov 0> $t1:E [0 1] "+" $t2:L ] ]
  57 .
  58 *)
  59