proper Proof.context for classical tactics;
reduced claset to snapshot of classical context;
discontinued clasimpset;
(*  Title:      HOL/MicroJava/J/SystemClasses.thy
    Author:     Gerwin Klein
    Copyright   2002 Technische Universitaet Muenchen
*)
header {* \isaheader{System Classes} *}
theory SystemClasses imports Decl begin
text {*
  This theory provides definitions for the @{text Object} class,
  and the system exceptions.
*}
definition ObjectC :: "'c cdecl" where
  "ObjectC \<equiv> (Object, (undefined,[],[]))"
definition NullPointerC :: "'c cdecl" where
  "NullPointerC \<equiv> (Xcpt NullPointer, (Object,[],[]))"
definition ClassCastC :: "'c cdecl" where
  "ClassCastC \<equiv> (Xcpt ClassCast, (Object,[],[]))"
definition OutOfMemoryC :: "'c cdecl" where
  "OutOfMemoryC \<equiv> (Xcpt OutOfMemory, (Object,[],[]))"
definition SystemClasses :: "'c cdecl list" where
  "SystemClasses \<equiv> [ObjectC, NullPointerC, ClassCastC, OutOfMemoryC]"
end