text: 
  """ simple non-constant constant. Ie constant which does not get annotated as constant
  """
  
  from pypy.rpython.extregistry import ExtRegistryEntry
  from pypy.annotation.bookkeeper import getbookkeeper
  from pypy.objspace.flow.model import Variable, Constant
  from pypy.rpython.lltypesystem import lltype
  
  class NonConstant(object):
      def __init__(self, _constant):
          self.__dict__['constant'] = _constant
  
      def __getattr__(self, attr):
          return getattr(self.__dict__['constant'], attr)
  
      def __setattr__(self, attr, value):
          setattr(self.__dict__['constant'], attr, value)
  
  class EntryNonConstant(ExtRegistryEntry):
      _about_ = NonConstant
      
      def compute_result_annotation(self, arg):
          if hasattr(arg, 'const'):
              return self.bookkeeper.immutablevalue(arg.const, False)
          else:
              return arg
  
      def specialize_call(self, hop):
          hop.exception_cannot_occur()
          retval = Constant(hop.r_result.convert_const(hop.args_v[0].value))
          retval.concretetype = hop.r_result.lowleveltype
          return retval
  
  