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""" transparent list implementation
"""
from pypy.interpreter import baseobjspace
from pypy.interpreter.error import OperationError, oefmt
from pypy.module.exceptions import interp_exceptions
def transparent_class(name, BaseCls):
class W_Transparent(BaseCls):
def __init__(self, space, w_type, w_controller):
self.w_type = w_type
self.w_controller = w_controller
def descr_call_mismatch(self, space, name, reqcls, args):
args_w = args.arguments_w[:]
args_w[0] = space.newtext(name)
args = args.replace_arguments(args_w)
return space.call_args(self.w_controller, args)
def getclass(self, space):
return self.w_type
def setclass(self, space, w_subtype):
raise oefmt(space.w_TypeError,
"You cannot override __class__ for transparent "
"proxies")
def getdictvalue(self, space, attr):
try:
return space.call_function(self.w_controller, space.newtext('__getattribute__'),
space.newtext(attr))
except OperationError as e:
if not e.match(space, space.w_AttributeError):
raise
return None
def setdictvalue(self, space, attr, w_value):
try:
space.call_function(self.w_controller, space.newtext('__setattr__'),
space.newtext(attr), w_value)
return True
except OperationError as e:
if not e.match(space, space.w_AttributeError):
raise
return False
def deldictvalue(self, space, attr):
try:
space.call_function(self.w_controller, space.newtext('__delattr__'),
space.newtext(attr))
return True
except OperationError as e:
if not e.match(space, space.w_AttributeError):
raise
return False
def getdict(self, space):
return self.getdictvalue(space, '__dict__')
def setdict(self, space, w_dict):
if not self.setdictvalue(space, '__dict__', w_dict):
baseobjspace.W_Root.setdict(self, space, w_dict)
W_Transparent.__name__ = name
return W_Transparent
W_Transparent = transparent_class('W_Transparent', baseobjspace.W_Root)
W_TransparentBaseException = transparent_class('W_TransparentBaseException', interp_exceptions.W_BaseException)
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