def put_value(v_completion: Completion,
w_completion: Completion) -> Completion:
if v_completion.is_abrupt():
return v_completion
v = v_completion.value
if w_completion.is_abrupt():
return w_completion
w = w_completion.value
if not isinstance(v, Reference):
return ThrowCompletion(value('new ReferenceError')) # FIXME
base = get_base(v)
if is_unresolvable_reference(v) is Value.true:
if is_strict_reference(v) is Value.true:
return ThrowCompletion(value('new ReferenceError')) # FIXME
# https://tc39.es/ecma262/#sec-putvalue
raise NotImplementedError()
if is_property_reference(v) is Value.true:
if has_primitive_base(v) is Value.true:
assert type_of(get_base(v)) not in ('undefined', 'null')
# https://tc39.es/ecma262/#sec-putvalue
raise NotImplementedError()
# https://tc39.es/ecma262/#sec-putvalue
raise NotImplementedError()
assert isinstance(v, EnvironmentRecord)
return base.set_mutable_binding(get_referenced_name(v), w,
is_strict_reference(v))
def bind_this_value(self, val: Value) -> 'Completion':
assert self.this_binding_status != ThisBindingStatus.LEXICAL
if self.this_binding_status == ThisBindingStatus.INITIALIZED:
return ThrowCompletion(value('new ReferenceError')) # FIXME
self.this_value = val
self.this_binding_status = ThisBindingStatus.INITIALIZED
return NormalCompletion(val)
def get_binding_value(self, name: Value, strict: Value) -> Completion:
assert strict is Value.true
assert name in self.bindings or name in self.indirect_bindings
if name in self.indirect_bindings:
binding = self.indirect_bindings[name]
m = binding.module_record
n2 = binding.name2
target_env = m.environment
if target_env is None:
return ThrowCompletion(value('new ReferenceError')) # FIXME
target_er = target_env.environment_record
return target_er.get_binding_value(n2, Value.true)
binding2 = self.bindings[name]
if not binding2.initialized:
return ThrowCompletion(value('new ReferenceError')) # FIXME
return NormalCompletion(binding2.value)
def resolve_binding(name: Value,
env: Optional[LexicalEnvironment] = None,
strict: bool = False) -> Reference:
if not env:
assert surrounding_agent is not None
env = surrounding_agent.running_execution_context.lexical_environment
assert isinstance(env, LexicalEnvironment)
ref = get_identifier_reference(env, name, value(strict))
assert isinstance(ref, Reference)
return ref
def get_value(v_completion: Completion) -> Completion:
if v_completion.is_abrupt():
return v_completion
v = v_completion.value
if not isinstance(v, Reference):
return NormalCompletion(v)
base = get_base(v)
if is_unresolvable_reference(v) is Value.true:
return ThrowCompletion(value('new TypeError')) # FIXME
if is_property_reference(v) is Value.true:
if has_primitive_base(v) is Value.true:
assert type_of(v.base) not in ('null', 'undefined')
# https://tc39.es/ecma262/#sec-getvalue
raise NotImplementedError()
raise NotImplementedError()
assert isinstance(base, EnvironmentRecord)
return base.get_binding_value(get_referenced_name(v),
is_strict_reference(v))
def is_super_reference(ref: Reference) -> Value:
return value(isinstance(ref, SuperReference))
def is_unresolvable_reference(ref: Reference) -> Value:
return value(ref.base is Value.undefined)
def is_property_reference(ref: Reference) -> Completion:
return NormalCompletion(
value(
type_of(ref.base) == 'object'
or has_primitive_base(ref) is Value.true))
def has_primitive_base(ref: Reference) -> Value:
return value(isinstance(ref.base, Value) and ref.base.is_primitive())
def get_this_binding(self) -> 'Completion':
assert self.this_binding_status != ThisBindingStatus.LEXICAL
if self.this_binding_status == ThisBindingStatus.UNINITIALIZED:
return ThrowCompletion(value('new ReferenceError')) # FIXME
return NormalCompletion(self.this_value)
def has_super_binding(self) -> 'Completion':
if self.this_binding_status == ThisBindingStatus.LEXICAL:
return NormalCompletion(Value.false)
return NormalCompletion(value(self.home_object is not Value.undefined))
def has_this_binding(self) -> Value:
return value(self.this_binding_status != ThisBindingStatus.LEXICAL)
def has_var_declaration(self, name: Value) -> Completion:
return NormalCompletion(value(name in self.var_names))
def create_immutable_binding(self, name: Value,
strict: Value) -> Completion:
if self.declarative_record.has_binding(name) is Value.true:
return ThrowCompletion(value('new TypeError')) # FIXME
return self.declarative_record.create_immutable_binding(name, strict)
def test_value(self):
self.assertIs(value(True), Value.true)
self.assertIs(value(False), Value.false)
self.assertIs(value(None), Value.null)
self.assertIs(value(UNDEFINED), Value.undefined)
self.assertIs(value(), Value.undefined)