def _buildClassNode3(provider, node, source_ref):
# Many variables, due to the huge re-formulation that is going on here,
# which just has the complexity, pylint: disable=R0914
# This function is the Python3 special case with special re-formulation as
# according to developer manual.
class_statements, class_doc = extractDocFromBody(node)
# We need a scope for the temporary variables, and they might be closured.
temp_scope = provider.allocateTempScope(
name = "class_creation",
allow_closure = True
)
tmp_bases = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "bases"
)
tmp_class_decl_dict = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "class_decl_dict"
)
tmp_metaclass = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "metaclass"
)
tmp_prepared = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "prepared"
)
class_creation_function = ExpressionClassBody(
provider = provider,
is_class = True,
parameters = make_class_parameters,
name = node.name,
doc = class_doc,
source_ref = source_ref
)
body = buildStatementsNode(
provider = class_creation_function,
nodes = class_statements,
frame = True,
source_ref = source_ref
)
source_ref_orig = source_ref
if body is not None:
# The frame guard has nothing to tell its line number to.
body.source_ref = source_ref
module_variable = class_creation_function.getVariableForAssignment(
"__module__"
)
statements = [
StatementSetLocals(
new_locals = ExpressionTempVariableRef(
variable = tmp_prepared,
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = "__module__",
variable = module_variable,
source_ref = source_ref
),
source = ExpressionConstantRef(
constant = provider.getParentModule().getFullName(),
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
)
]
if class_doc is not None:
doc_variable = class_creation_function.getVariableForAssignment(
"__doc__"
)
statements.append(
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = "__doc__",
variable = doc_variable,
source_ref = source_ref
),
source = ExpressionConstantRef(
constant = class_doc,
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
)
)
# The "__qualname__" attribute is new in Python 3.3.
if Utils.python_version >= 330:
qualname = class_creation_function.getFunctionQualname()
qualname_variable = class_creation_function.getVariableForAssignment(
"__qualname__"
)
if Utils.python_version < 340:
qualname_ref = ExpressionConstantRef(
constant = qualname,
source_ref = source_ref,
user_provided = True
)
else:
qualname_ref = ExpressionFunctionQualnameRef(
function_body = class_creation_function,
source_ref = source_ref,
)
statements.append(
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = "__qualname__",
variable = qualname_variable,
source_ref = source_ref
),
source = qualname_ref,
source_ref = source_ref
)
)
if Utils.python_version >= 340:
qualname_assign = statements[-1]
if Utils.python_version >= 340 and False: # TODO: Temporarily reverted:
tmp_class = class_creation_function.allocateTempVariable(
temp_scope = None,
name = "__class__"
)
class_target_variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_class,
source_ref = source_ref
)
class_variable_ref = ExpressionTempVariableRef(
variable = tmp_class,
source_ref = source_ref
)
else:
class_variable = class_creation_function.getVariableForAssignment(
"__class__"
)
class_target_variable_ref = ExpressionTargetVariableRef(
variable_name = "__class__",
variable = class_variable,
source_ref = source_ref
)
class_variable_ref = ExpressionVariableRef(
variable_name = "__class__",
variable = class_variable,
source_ref = source_ref
)
statements += [
body,
StatementAssignmentVariable(
variable_ref = class_target_variable_ref,
source = ExpressionCall(
called = ExpressionTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
args = makeSequenceCreationOrConstant(
sequence_kind = "tuple",
elements = (
ExpressionConstantRef(
constant = node.name,
source_ref = source_ref,
user_provided = True
),
ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
ExpressionBuiltinLocals(
source_ref = source_ref
)
),
source_ref = source_ref
),
kw = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
StatementReturn(
expression = class_variable_ref,
source_ref = source_ref
)
]
body = makeStatementsSequence(
statements = statements,
allow_none = True,
source_ref = source_ref
)
# The class body is basically a function that implicitly, at the end
# returns its locals and cannot have other return statements contained.
class_creation_function.setBody(body)
# The class body is basically a function that implicitly, at the end
# returns its created class and cannot have other return statements
# contained.
decorated_body = ExpressionFunctionCall(
function = ExpressionFunctionCreation(
function_ref = ExpressionFunctionRef(
function_body = class_creation_function,
source_ref = source_ref
),
defaults = (),
kw_defaults = None,
annotations = None,
source_ref = source_ref
),
values = (),
source_ref = source_ref
)
for decorator in buildNodeList(
provider,
reversed(node.decorator_list),
source_ref
):
decorated_body = ExpressionCallNoKeywords(
called = decorator,
args = ExpressionMakeTuple(
elements = (
decorated_body,
),
source_ref = source_ref
),
source_ref = decorator.getSourceReference()
)
statements = (
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
source = makeSequenceCreationOrConstant(
sequence_kind = "tuple",
elements = buildNodeList(
provider, node.bases, source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
source = makeDictCreationOrConstant(
keys = [
ExpressionConstantRef(
constant = keyword.arg,
source_ref = source_ref,
user_provided = True
)
for keyword in
node.keywords
],
values = [
buildNode(provider, keyword.value, source_ref)
for keyword in
node.keywords
],
lazy_order = False,
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
source = ExpressionSelectMetaclass(
metaclass = ExpressionConditional(
condition = ExpressionComparison(
comparator = "In",
left = ExpressionConstantRef(
constant = "metaclass",
source_ref = source_ref,
user_provided = True
),
right = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
source_ref = source_ref
),
expression_yes = ExpressionDictOperationGet(
dict_arg = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
key = ExpressionConstantRef(
constant = "metaclass",
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
),
expression_no = ExpressionConditional(
condition = ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
expression_no = ExpressionBuiltinRef(
builtin_name = "type",
source_ref = source_ref
),
expression_yes = ExpressionBuiltinType1(
value = ExpressionSubscriptLookup(
subscribed = ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
subscript = ExpressionConstantRef(
constant = 0,
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
bases = ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref_orig
),
StatementConditional(
condition = ExpressionComparison(
comparator = "In",
left = ExpressionConstantRef(
constant = "metaclass",
source_ref = source_ref,
user_provided = True
),
right = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
source_ref = source_ref
),
no_branch = None,
yes_branch = makeStatementsSequenceFromStatement(
statement = StatementDictOperationRemove(
dict_arg = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
key = ExpressionConstantRef(
constant = "metaclass",
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
)
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_prepared,
source_ref = source_ref
),
source = ExpressionConditional(
condition = ExpressionBuiltinHasattr( # pylint: disable=E1120,E1123
object = ExpressionTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
name = ExpressionConstantRef(
constant = "__prepare__",
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
),
expression_no = ExpressionConstantRef(
constant = {},
source_ref = source_ref,
user_provided = True
),
expression_yes = ExpressionCall(
called = ExpressionAttributeLookup(
source = ExpressionTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
attribute_name = "__prepare__",
source_ref = source_ref
),
args = ExpressionMakeTuple(
elements = (
ExpressionConstantRef(
constant = node.name,
source_ref = source_ref,
user_provided = True
),
ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
)
),
source_ref = source_ref
),
kw = ExpressionTempVariableRef(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = node.name,
source_ref = source_ref
),
source = decorated_body,
source_ref = source_ref
),
)
if Utils.python_version >= 340:
class_assign = statements[-1]
# assert False, class_creation_function
class_creation_function.qualname_setup = class_assign, qualname_assign
final = (
StatementReleaseVariable(
variable = tmp_bases,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_class_decl_dict,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_metaclass,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_prepared,
source_ref = source_ref
)
)
return makeTryFinallyStatement(
provider = provider,
tried = statements,
final = final,
source_ref = source_ref
)
def _buildClassNode2(provider, node, source_ref):
class_statements, class_doc = extractDocFromBody(node)
# This function is the Python2 special case with special re-formulation as
# according to developer manual.
function_body = ExpressionClassBody(
provider = provider,
is_class = True,
parameters = make_class_parameters,
name = node.name,
doc = class_doc,
source_ref = source_ref
)
body = buildStatementsNode(
provider = function_body,
nodes = class_statements,
frame = True,
source_ref = source_ref
)
if body is not None:
# The frame guard has nothing to tell its line number to.
body.source_ref = source_ref.atInternal()
# The class body is basically a function that implicitly, at the end
# returns its locals and cannot have other return statements contained, and
# starts out with a variables "__module__" and potentially "__doc__" set.
statements = [
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = "__module__",
source_ref = source_ref
),
source = ExpressionConstantRef(
constant = provider.getParentModule().getFullName(),
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref.atInternal()
)
]
if class_doc is not None:
statements.append(
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = "__doc__",
source_ref = source_ref
),
source = ExpressionConstantRef(
constant = class_doc,
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref.atInternal()
)
)
statements += [
body,
StatementReturn(
expression = ExpressionBuiltinLocals(
source_ref = source_ref
),
source_ref = source_ref.atInternal()
)
]
body = makeStatementsSequence(
statements = statements,
allow_none = True,
source_ref = source_ref
)
# The class body is basically a function that implicitly, at the end
# returns its locals and cannot have other return statements contained.
function_body.setBody(body)
temp_scope = provider.allocateTempScope("class_creation")
tmp_bases = provider.allocateTempVariable(temp_scope, "bases")
tmp_class_dict = provider.allocateTempVariable(temp_scope, "class_dict")
tmp_metaclass = provider.allocateTempVariable(temp_scope, "metaclass")
tmp_class = provider.allocateTempVariable(temp_scope, "class")
statements = [
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
source = makeSequenceCreationOrConstant(
sequence_kind = "tuple",
elements = buildNodeList(
provider, node.bases, source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_class_dict,
source_ref = source_ref
),
source = ExpressionFunctionCall(
function = ExpressionFunctionCreation(
function_ref = ExpressionFunctionRef(
function_body = function_body,
source_ref = source_ref
),
defaults = (),
kw_defaults = None,
annotations = None,
source_ref = source_ref
),
values = (),
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
source = ExpressionConditional(
condition = ExpressionComparison(
comparator = "In",
left = ExpressionConstantRef(
constant = "__metaclass__",
source_ref = source_ref,
user_provided = True
),
right = ExpressionTempVariableRef(
variable = tmp_class_dict,
source_ref = source_ref
),
source_ref = source_ref
),
expression_yes = ExpressionDictOperationGet(
dict_arg = ExpressionTempVariableRef(
variable = tmp_class_dict,
source_ref = source_ref
),
key = ExpressionConstantRef(
constant = "__metaclass__",
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
),
expression_no = ExpressionSelectMetaclass(
metaclass = None,
bases = ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_class,
source_ref = source_ref
),
source = ExpressionCallNoKeywords(
called = ExpressionTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
args = ExpressionMakeTuple(
elements = (
ExpressionConstantRef(
constant = node.name,
source_ref = source_ref,
user_provided = True
),
ExpressionTempVariableRef(
variable = tmp_bases,
source_ref = source_ref
),
ExpressionTempVariableRef(
variable = tmp_class_dict,
source_ref = source_ref
)
),
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
),
]
for decorator in buildNodeList(
provider,
reversed(node.decorator_list),
source_ref
):
statements.append(
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_class,
source_ref = source_ref
),
source = ExpressionCallNoKeywords(
called = decorator,
args = ExpressionMakeTuple(
elements = (
ExpressionTempVariableRef(
variable = tmp_class,
source_ref = source_ref
),
),
source_ref = source_ref
),
source_ref = decorator.getSourceReference()
),
source_ref = decorator.getSourceReference()
)
)
statements.append(
StatementAssignmentVariable(
variable_ref = ExpressionTargetVariableRef(
variable_name = node.name,
source_ref = source_ref
),
source = ExpressionTempVariableRef(
variable = tmp_class,
source_ref = source_ref
),
source_ref = source_ref
)
)
final = (
StatementReleaseVariable(
variable = tmp_class,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_bases,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_class_dict,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_metaclass,
source_ref = source_ref
)
)
return makeTryFinallyStatement(
provider = function_body,
tried = statements,
final = final,
source_ref = source_ref
)