def coerce(self, value):
if value is None:
return None
if isinstance(value, Entity):
return value.identity
if isinstance(value, identity.Identity):
return value
value_repr = None
try:
value_repr = repr(value)
except Exception as e:
raise TypeError(
("Object passed to coerce is not an identity. Additionally, "
"calling repr(object) raised %s.") % e)
if superposition.insuperposition(value):
if superposition.state_type(value) == identity.Identity:
return value
raise TypeError(
"Object being coerced as identity is a superposition %s of "
"variant type %r." % (value_repr, value.type_name))
raise TypeError("%s is not an identity." % value_repr)
def coerce(self, value):
if value is None:
return None
if isinstance(value, Entity):
return value.identity
if isinstance(value, identity.Identity):
return value
value_repr = None
try:
value_repr = repr(value)
except Exception as e:
raise TypeError(
("Object passed to coerce is not an identity. Additionally, "
"calling repr(object) raised %s.") % e)
if superposition.insuperposition(value):
if superposition.state_type(value) == identity.Identity:
return value
raise TypeError(
"Object being coerced as identity is a superposition %s of "
"variant type %r." % (value_repr, value.type_name))
raise TypeError("%s is not an identity." % value_repr)
def __init__(self, first_state=None, *states):
self._delegate = self._make_delegate()
if first_state is None:
return
self._state_type = superposition.state_type(first_state)
self.add_state(first_state)
for state in states:
if superposition.state_type(state) != self.state_type():
raise TypeError(
"All states of a superposition must be of the same type."
" First argument was of type %r, but argument %r is of "
" type %r." % (self.state_type(), state,
superposition.state_type(state)))
self.add_state(state)
def __init__(self, first_state=None, *states):
self._delegate = self._make_delegate()
if first_state is None:
return
self._state_type = superposition.state_type(first_state)
self.add_state(first_state)
for state in states:
if superposition.state_type(state) != self.state_type():
raise TypeError(
"All states of a superposition must be of the same type."
" First argument was of type %r, but argument %r is of "
" type %r." %
(self.state_type(), state,
superposition.state_type(state)))
self.add_state(state)
def testNesting(self):
"""Test that superpositions remain flat."""
s = superposition.superposition("foo", "bar")
s = superposition.superposition(s, "baz")
self.assertStateEq(superposition.superposition("foo", "bar", "baz"), s)
s = superposition.superposition("zoo", s)
self.assertStateEq(
superposition.superposition("foo", "bar", "baz", "zoo"), s)
self.assertEqual(superposition.state_type(s), type("foo"))
def testNesting(self):
"""Test that superpositions remain flat."""
s = superposition.superposition("foo", "bar")
s = superposition.superposition(s, "baz")
self.assertStateEq(superposition.superposition("foo", "bar", "baz"), s)
s = superposition.superposition("zoo", s)
self.assertStateEq(
superposition.superposition("foo", "bar", "baz", "zoo"), s)
self.assertEqual(superposition.state_type(s), type("foo"))
def _typecheck(self, other, operation="compare"):
other_type = superposition.state_type(other)
if other_type != self._state_type:
raise TypeError(
"Can't %s %r of state type %r with %r of state type %r."
% (operation, other, other_type, self, self._state_type))
def _typecheck(self, other, operation="compare"):
other_type = superposition.state_type(other)
if other_type != self._state_type:
raise TypeError(
"Can't %s %r of state type %r with %r of state type %r." %
(operation, other, other_type, self, self._state_type))
