src/HOL/MicroJava/J/Term.thy

improved superclass entry for classes and definition status of is_class, class
corrected recursive definitions of "method" and "fields"
cleanup of many proofs, removed superfluous tactics and theorems

(*  Title:      HOL/MicroJava/J/Term.thy
    ID:         $Id$
    Author:     David von Oheimb
    Copyright   1999 Technische Universitaet Muenchen

Java expressions and statements
*)

Term = Value +

datatype binop = Eq | Add    (* function codes for binary operation *)

datatype expr
  = NewC cname               (* class instance creation *)
  | Cast cname expr          (* type cast *)
  | Lit val                  (* literal value, also references *)
  | BinOp binop expr expr    (* binary operation *)
  | LAcc vname               (* local (incl. parameter) access *)
  | LAss vname expr          (* local assign *) ("_::=_"   [      90,90]90)
  | FAcc cname expr vname    (* field access *) ("{_}_.._" [10,90,99   ]90)
  | FAss cname expr vname 
                    expr     (* field ass. *) ("{_}_.._:=_" [10,90,99,90]90)
  | Call expr mname 
    (ty list) (expr list)    (* method call*) ("_.._'({_}_')" [90,99,10,10] 90)

datatype stmt
  = Skip                     (* empty statement *)
  | Expr expr                (* expression statement *)
  | Comp stmt stmt       ("_;; _"             [61,60]60)
  | Cond expr stmt stmt  ("If '(_') _ Else _" [80,79,79]70)
  | Loop expr stmt       ("While '(_') _"     [80,79]70)

end