def run(self, guard, specimen, ej):
if guard != NullObject:
val = guard.call(u"coerce", [specimen, ej])
g = guard
else:
val = specimen
g = anyGuard
return FinalSlot(val, g)
def recv(self, atom, args):
if atom is RUN_3:
guard, specimen, ej = args[0], args[1], args[2]
if guard != NullObject:
val = guard.coerce(specimen, ej)
g = guard
else:
val = specimen
g = anyGuard
return FinalSlot(val, g)
if atom is ASTYPE_0:
return theFinalSlotGuardMaker
raise Refused(self, atom, args)
def commit(self):
if self.committed:
raise userError(u"already commited")
self.committed = True
if isinstance(self.resolutionBox, FinalSlot):
res = self.resolutionBox.get()
else:
res = UnconnectedRef(
StrObject(u"Resolution promise of a proxy handled by " +
self.handler.toString() +
u" didn't resolve to a FinalSlot, but " +
self.resolutionBox.toString() + u" instead."))
self.resolutionBox = FinalSlot(res, anyGuard)
self.handler = None
return res
def commit(self):
# A FarRef can only stop proxying if it becomes disconnected, when it
# resolves to a DisconnectedRef.
handler = self.handler
resolution = Proxy.commit(self)
if not isinstance(resolution, UnconnectedRef):
problem = StrObject(u"Attempt to resolve a far ref handled by " +
handler.toString() +
u"to a different identity (" +
resolution.toString() + u")")
else:
problem = resolution._problem
resolution = DisconnectedRef(handler, self.resolutionIdentity, problem)
self.resolutionBox = FinalSlot(resolution, anyGuard)
self.resolutionIdentity = None
def testFinalImmutabilityLocal(self):
env = Environment([], [], 1, 0, 0)
env.createSlotLocal(0, FinalSlot(NullObject, NullObject),
theFinalSlotGuardMaker)
self.assertRaises(UserException, env.putValueLocal, 0, NullObject)
def testFinalImmutabilityFrame(self):
env = Environment([
Binding(FinalSlot(NullObject, NullObject), theFinalSlotGuardMaker)
], [], 0, 0, 0)
self.assertRaises(UserException, env.putValueFrame, 0, NullObject)
