def buildClassNode2(provider, node, source_ref):
# This function is the Python2 special case with special re-formulation as
# according to developer manual, and it's very detailed, pylint: disable=too-many-locals
class_statement_nodes, class_doc = extractDocFromBody(node)
function_body = ExpressionClassBody(provider=provider,
name=node.name,
doc=class_doc,
source_ref=source_ref)
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=node.name,
co_kind="Class",
co_varnames=(),
co_argcount=0,
co_posonlyargcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False,
co_filename=parent_module.getRunTimeFilename(),
co_lineno=source_ref.getLineNumber(),
future_spec=parent_module.getFutureSpec(),
)
body = buildFrameNode(
provider=function_body,
nodes=class_statement_nodes,
code_object=code_object,
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()
locals_scope = function_body.getLocalsScope()
# 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 = [
StatementSetLocalsDictionary(locals_scope=locals_scope,
source_ref=source_ref),
StatementAssignmentVariableName(
provider=function_body,
variable_name="__module__",
source=ExpressionModuleAttributeNameRef(
variable=provider.getParentModule().getVariableForReference(
"__name__"),
source_ref=source_ref,
),
source_ref=source_ref.atInternal(),
),
]
if class_doc is not None:
statements.append(
StatementAssignmentVariableName(
provider=function_body,
variable_name="__doc__",
source=makeConstantRefNode(constant=class_doc,
source_ref=source_ref,
user_provided=True),
source_ref=source_ref.atInternal(),
))
statements += (
body,
StatementReturn(
expression=ExpressionBuiltinLocalsRef(locals_scope=locals_scope,
source_ref=source_ref),
source_ref=source_ref,
),
)
body = makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=function_body,
tried=mergeStatements(statements, True),
final=StatementReleaseLocals(locals_scope=locals_scope,
source_ref=source_ref),
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")
select_metaclass = ExpressionOutlineBody(provider=provider,
name="select_metaclass",
body=None,
source_ref=source_ref)
if node.bases:
tmp_base = select_metaclass.allocateTempVariable(temp_scope=None,
name="base")
statements = (
StatementAssignmentVariable(
variable=tmp_base,
source=ExpressionSubscriptLookup(
expression=ExpressionTempVariableRef(
variable=tmp_bases, source_ref=source_ref),
subscript=makeConstantRefNode(constant=0,
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
),
source_ref=source_ref,
),
makeTryFinallyStatement(
provider,
tried=StatementTry(
tried=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionAttributeLookup(
expression=ExpressionTempVariableRef(
variable=tmp_base, source_ref=source_ref),
attribute_name="__class__",
source_ref=source_ref,
),
source_ref=source_ref,
)),
except_handler=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=tmp_base, source_ref=source_ref),
source_ref=source_ref,
),
source_ref=source_ref,
)),
break_handler=None,
continue_handler=None,
return_handler=None,
source_ref=source_ref,
),
final=StatementReleaseVariable(variable=tmp_base,
source_ref=source_ref),
source_ref=source_ref,
public_exc=False,
),
)
else:
statements = (
StatementTry(
tried=makeStatementsSequenceFromStatement(
statement=StatementReturn(
# TODO: Should avoid checking __builtins__ for this.
expression=ExpressionVariableNameRef(
variable_name="__metaclass__",
provider=parent_module,
source_ref=source_ref,
),
source_ref=source_ref,
)),
except_handler=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionBuiltinAnonymousRef(
builtin_name="classobj", source_ref=source_ref),
source_ref=source_ref,
)),
break_handler=None,
continue_handler=None,
return_handler=None,
source_ref=source_ref,
), )
select_metaclass.setBody(
makeStatementsSequence(statements=statements,
allow_none=False,
source_ref=source_ref))
statements = [
StatementAssignmentVariable(
variable=tmp_bases,
source=makeSequenceCreationOrConstant(
sequence_kind="tuple",
elements=buildNodeList(provider=provider,
nodes=node.bases,
source_ref=source_ref),
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariable(variable=tmp_class_dict,
source=function_body,
source_ref=source_ref),
StatementAssignmentVariable(
variable=tmp_metaclass,
source=ExpressionConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(
constant="__metaclass__",
source_ref=source_ref,
user_provided=True,
),
dict_arg=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=makeConstantRefNode(
constant="__metaclass__",
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref,
),
expression_no=select_metaclass,
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariable(
variable=tmp_class,
source=makeExpressionCall(
called=ExpressionTempVariableRef(variable=tmp_metaclass,
source_ref=source_ref),
args=ExpressionMakeTuple(
elements=(
makeConstantRefNode(
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,
),
kw=None,
source_ref=source_ref,
),
source_ref=source_ref,
),
]
for decorator in buildNodeList(provider, reversed(node.decorator_list),
source_ref):
statements.append(
StatementAssignmentVariable(
variable=tmp_class,
source=makeExpressionCall(
called=decorator,
args=ExpressionMakeTuple(
elements=(ExpressionTempVariableRef(
variable=tmp_class, source_ref=source_ref), ),
source_ref=source_ref,
),
kw=None,
source_ref=decorator.getSourceReference(),
),
source_ref=decorator.getSourceReference(),
))
statements.append(
StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
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)
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,R0915
# This function is the Python3 special case with special re-formulation as
# according to developer manual.
class_statement_nodes, 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,
name=node.name,
doc=class_doc,
flags=set(),
source_ref=source_ref)
if 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)
code_object = CodeObjectSpec(co_name=node.name,
co_kind="Class",
co_varnames=(),
co_argcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False)
body = buildFrameNode(provider=class_creation_function,
nodes=class_statement_nodes,
code_object=code_object,
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=makeConstantRefNode(
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=makeConstantRefNode(constant=class_doc,
source_ref=source_ref,
user_provided=True),
source_ref=source_ref))
# The "__qualname__" attribute is new in Python 3.3.
if python_version >= 330:
qualname = class_creation_function.getFunctionQualname()
qualname_variable = class_creation_function.getVariableForAssignment(
"__qualname__")
if python_version < 340:
qualname_ref = makeConstantRefNode(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 python_version >= 340:
qualname_assign = statements[-1]
if python_version >= 360 and \
class_creation_function.needsAnnotationsDictionary():
annotations_variable = class_creation_function.getVariableForAssignment(
"__annotations__")
statements.append(
StatementAssignmentVariable(
variable_ref=ExpressionTargetVariableRef(
variable_name="__annotations__",
variable=annotations_variable,
source_ref=source_ref),
source=makeConstantRefNode(constant={},
source_ref=source_ref,
user_provided=True),
source_ref=source_ref))
statements.append(body)
statements += [
StatementAssignmentVariable(
variable_ref=class_target_variable_ref,
source=ExpressionCall(
called=ExpressionTempVariableRef(variable=tmp_metaclass,
source_ref=source_ref),
args=makeSequenceCreationOrConstant(
sequence_kind="tuple",
elements=(makeConstantRefNode(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)
class_creation_function.registerProvidedVariable(tmp_bases)
class_creation_function.registerProvidedVariable(tmp_class_decl_dict)
class_creation_function.registerProvidedVariable(tmp_metaclass)
class_creation_function.registerProvidedVariable(tmp_prepared)
# 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),
code_object=code_object,
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=[
makeConstantRefNode(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
],
source_ref=source_ref),
source_ref=source_ref),
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref),
source=ExpressionSelectMetaclass(metaclass=ExpressionConditional(
condition=ExpressionComparisonIn(
left=makeConstantRefNode(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=makeConstantRefNode(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=makeConstantRefNode(
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=ExpressionComparisonIn(
left=makeConstantRefNode(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=makeConstantRefNode(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=makeConstantRefNode(constant="__prepare__",
source_ref=source_ref,
user_provided=True),
source_ref=source_ref),
expression_no=makeConstantRefNode(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=(makeConstantRefNode(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 python_version >= 340:
class_assign = statements[-1]
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 buildClassNode3(provider, node, source_ref):
# Many variables, due to the huge re-formulation that is going on here,
# which just has the complexity and optimization checks:
# pylint: disable=I0021,too-many-branches,too-many-locals,too-many-statements
# This function is the Python3 special case with special re-formulation as
# according to developer manual.
class_statement_nodes, class_doc = extractDocFromBody(node)
# We need a scope for the temporary variables, and they might be closured.
temp_scope = provider.allocateTempScope(name="class_creation")
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,
name=node.name,
doc=class_doc,
source_ref=source_ref)
class_locals_scope = class_creation_function.getLocalsScope()
# Only local variable, for provision to methods.
class_variable = class_locals_scope.getLocalVariable(
owner=class_creation_function, variable_name="__class__")
class_locals_scope.registerProvidedVariable(class_variable)
class_variable_ref = ExpressionVariableRef(variable=class_variable,
source_ref=source_ref)
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=node.name,
co_kind="Class",
co_varnames=(),
co_freevars=(),
co_argcount=0,
co_posonlyargcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False,
co_filename=parent_module.getRunTimeFilename(),
co_lineno=source_ref.getLineNumber(),
future_spec=parent_module.getFutureSpec(),
)
body = buildFrameNode(
provider=class_creation_function,
nodes=class_statement_nodes,
code_object=code_object,
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
locals_scope = class_creation_function.getLocalsScope()
statements = [
StatementSetLocals(
locals_scope=locals_scope,
new_locals=ExpressionTempVariableRef(variable=tmp_prepared,
source_ref=source_ref),
source_ref=source_ref,
),
StatementAssignmentVariableName(
provider=class_creation_function,
variable_name="__module__",
source=ExpressionModuleAttributeNameRef(
variable=provider.getParentModule().getVariableForReference(
"__name__"),
source_ref=source_ref,
),
source_ref=source_ref,
),
]
if class_doc is not None:
statements.append(
StatementAssignmentVariableName(
provider=class_creation_function,
variable_name="__doc__",
source=makeConstantRefNode(constant=class_doc,
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
))
# The "__qualname__" attribute is new in Python3.
qualname = class_creation_function.getFunctionQualname()
if python_version < 0x340:
qualname_ref = makeConstantRefNode(constant=qualname,
source_ref=source_ref,
user_provided=True)
else:
qualname_ref = ExpressionFunctionQualnameRef(
function_body=class_creation_function, source_ref=source_ref)
statements.append(
StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__qualname__",
value=qualname_ref,
source_ref=source_ref,
))
if python_version >= 0x340:
qualname_assign = statements[-1]
if python_version >= 0x360 and class_creation_function.needsAnnotationsDictionary(
):
statements.append(
StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__annotations__",
value=makeConstantRefNode(constant={},
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
))
statements.append(body)
if node.bases:
tmp_bases = provider.allocateTempVariable(temp_scope=temp_scope,
name="bases")
if python_version >= 0x370:
tmp_bases_orig = provider.allocateTempVariable(
temp_scope=temp_scope, name="bases_orig")
def makeBasesRef():
return ExpressionTempVariableRef(variable=tmp_bases,
source_ref=source_ref)
else:
def makeBasesRef():
return makeConstantRefNode(constant=(), source_ref=source_ref)
if python_version >= 0x370 and node.bases:
statements.append(
makeStatementConditional(
condition=makeComparisonExpression(
comparator="NotEq",
left=ExpressionTempVariableRef(variable=tmp_bases,
source_ref=source_ref),
right=ExpressionTempVariableRef(variable=tmp_bases_orig,
source_ref=source_ref),
source_ref=source_ref,
),
yes_branch=StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__orig_bases__",
value=ExpressionTempVariableRef(variable=tmp_bases_orig,
source_ref=source_ref),
source_ref=source_ref,
),
no_branch=None,
source_ref=source_ref,
))
statements += (
StatementAssignmentVariable(
variable=class_variable,
source=makeExpressionCall(
called=ExpressionTempVariableRef(variable=tmp_metaclass,
source_ref=source_ref),
args=makeExpressionMakeTuple(
elements=(
makeConstantRefNode(
constant=node.name,
source_ref=source_ref,
user_provided=True,
),
makeBasesRef(),
ExpressionBuiltinLocalsRef(locals_scope=locals_scope,
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 = makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=class_creation_function,
tried=mergeStatements(statements, True),
final=StatementReleaseLocals(locals_scope=locals_scope,
source_ref=source_ref),
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.setChild("body", 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 = class_creation_function
for decorator in buildNodeList(provider, reversed(node.decorator_list),
source_ref):
decorated_body = makeExpressionCall(
called=decorator,
args=makeExpressionMakeTuple(elements=(decorated_body, ),
source_ref=source_ref),
kw=None,
source_ref=decorator.getSourceReference(),
)
if node.keywords and node.keywords[-1].arg is None:
keywords = node.keywords[:-1]
else:
keywords = node.keywords
statements = []
if node.bases:
statements.append(
StatementAssignmentVariable(
variable=tmp_bases
if python_version < 0x370 else tmp_bases_orig,
source=_buildBasesTupleCreationNode(provider=provider,
elements=node.bases,
source_ref=source_ref),
source_ref=source_ref,
))
if python_version >= 0x370:
bases_conversion = ExpressionFunctionCall(
function=ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(
function_body=getClassBasesMroConversionHelper(),
source_ref=source_ref,
),
defaults=(),
kw_defaults=None,
annotations=None,
source_ref=source_ref,
),
values=(ExpressionTempVariableRef(variable=tmp_bases_orig,
source_ref=source_ref), ),
source_ref=source_ref,
)
statements.append(
StatementAssignmentVariable(variable=tmp_bases,
source=bases_conversion,
source_ref=source_ref))
statements.append(
StatementAssignmentVariable(
variable=tmp_class_decl_dict,
source=makeDictCreationOrConstant2(
keys=[keyword.arg for keyword in keywords],
values=[
buildNode(provider, keyword.value, source_ref)
for keyword in keywords
],
source_ref=source_ref,
),
source_ref=source_ref,
))
if node.keywords and node.keywords[-1].arg is None:
statements.append(
StatementDictOperationUpdate(
dict_arg=ExpressionVariableRef(variable=tmp_class_decl_dict,
source_ref=source_ref),
value=buildNode(provider, node.keywords[-1].value, source_ref),
source_ref=source_ref,
))
# Check if there are bases, and if there are, go with the type of the
# first base class as a metaclass unless it was specified in the class
# decl dict of course.
if node.bases:
unspecified_metaclass_expression = ExpressionBuiltinType1(
value=ExpressionSubscriptLookup(
expression=ExpressionTempVariableRef(variable=tmp_bases,
source_ref=source_ref),
subscript=makeConstantRefNode(constant=0,
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
),
source_ref=source_ref,
)
# Might become empty behind our back during conversion, therefore make the
# check at run time for 3.7 or higher.
if python_version >= 0x370:
unspecified_metaclass_expression = ExpressionConditional(
condition=ExpressionTempVariableRef(variable=tmp_bases,
source_ref=source_ref),
expression_yes=unspecified_metaclass_expression,
expression_no=makeExpressionBuiltinTypeRef(
builtin_name="type", source_ref=source_ref),
source_ref=source_ref,
)
else:
unspecified_metaclass_expression = makeExpressionBuiltinTypeRef(
builtin_name="type", source_ref=source_ref)
call_prepare = StatementAssignmentVariable(
variable=tmp_prepared,
source=makeExpressionCall(
called=ExpressionAttributeLookup(
expression=ExpressionTempVariableRef(variable=tmp_metaclass,
source_ref=source_ref),
attribute_name="__prepare__",
source_ref=source_ref,
),
args=makeExpressionMakeTuple(
elements=(
makeConstantRefNode(constant=node.name,
source_ref=source_ref,
user_provided=True),
makeBasesRef(),
),
source_ref=source_ref,
),
kw=ExpressionTempVariableRef(variable=tmp_class_decl_dict,
source_ref=source_ref),
source_ref=source_ref,
),
source_ref=source_ref,
)
if python_version >= 0x364:
call_prepare = makeStatementsSequenceFromStatements(
call_prepare,
makeStatementConditional(
condition=ExpressionAttributeCheck(
expression=ExpressionTempVariableRef(
variable=tmp_prepared, source_ref=source_ref),
attribute_name="__getitem__",
source_ref=source_ref,
),
yes_branch=None,
no_branch=makeRaiseExceptionExpressionFromTemplate(
exception_type="TypeError",
template="%s.__prepare__() must return a mapping, not %s",
template_args=(
ExpressionBuiltinGetattr(
expression=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref),
name=makeConstantRefNode(constant="__name__",
source_ref=source_ref),
default=makeConstantRefNode(constant="<metaclass>",
source_ref=source_ref),
source_ref=source_ref,
),
ExpressionAttributeLookup(
expression=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=tmp_prepared,
source_ref=source_ref),
source_ref=source_ref,
),
attribute_name="__name__",
source_ref=source_ref,
),
),
source_ref=source_ref,
).asStatement(),
source_ref=source_ref,
),
)
statements += (
StatementAssignmentVariable(
variable=tmp_metaclass,
source=ExpressionSelectMetaclass(
metaclass=ExpressionConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(
constant="metaclass",
source_ref=source_ref,
user_provided=True,
),
dict_arg=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=makeConstantRefNode(
constant="metaclass",
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref,
),
expression_no=unspecified_metaclass_expression,
source_ref=source_ref,
),
bases=makeBasesRef(),
source_ref=source_ref,
),
source_ref=source_ref_orig,
),
makeStatementConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(constant="metaclass",
source_ref=source_ref,
user_provided=True),
dict_arg=ExpressionTempVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref),
source_ref=source_ref,
),
no_branch=None,
yes_branch=StatementDictOperationRemove(
dict_arg=ExpressionTempVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref),
key=makeConstantRefNode(constant="metaclass",
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
),
source_ref=source_ref,
),
makeStatementConditional(
condition=ExpressionAttributeCheck(
expression=ExpressionTempVariableRef(variable=tmp_metaclass,
source_ref=source_ref),
attribute_name="__prepare__",
source_ref=source_ref,
),
yes_branch=call_prepare,
no_branch=StatementAssignmentVariable(
variable=tmp_prepared,
source=makeConstantRefNode(constant={},
source_ref=source_ref,
user_provided=True),
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
source=decorated_body,
source_ref=source_ref,
),
)
if python_version >= 0x340:
class_creation_function.qualname_setup = node.name, qualname_assign
final = [tmp_class_decl_dict, tmp_metaclass, tmp_prepared]
if node.bases:
final.insert(0, tmp_bases)
if python_version >= 0x370:
final.insert(0, tmp_bases_orig)
return makeTryFinallyStatement(
provider=provider,
tried=statements,
final=tuple(
StatementReleaseVariable(variable=variable, source_ref=source_ref)
for variable in final),
source_ref=source_ref,
)
def _buildClassNode2(provider, node, source_ref):
# This function is the Python2 special case with special re-formulation as
# according to developer manual, and it's very detailed, pylint: disable=R0914
class_statement_nodes, class_doc = extractDocFromBody(node)
function_body = ExpressionClassBody(provider=provider,
name=node.name,
doc=class_doc,
flags=set(),
source_ref=source_ref)
code_object = CodeObjectSpec(co_name=node.name,
co_kind="Class",
co_varnames=(),
co_argcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False)
body = buildFrameNode(provider=function_body,
nodes=class_statement_nodes,
code_object=code_object,
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=makeConstantRefNode(
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=makeConstantRefNode(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),
code_object=None,
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=ExpressionComparisonIn(
left=makeConstantRefNode(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=makeConstantRefNode(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=(makeConstantRefNode(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)
def buildClassNode3(provider, node, source_ref):
# Many variables, due to the huge re-formulation that is going on here,
# which just has the complexity and optimization checks:
# pylint: disable=I0021,too-many-branches,too-many-locals,too-many-statements
# This function is the Python3 special case with special re-formulation as
# according to developer manual.
class_statement_nodes, class_doc = extractDocFromBody(node)
# We need a scope for the temporary variables, and they might be closured.
temp_scope = provider.allocateTempScope(name="class_creation")
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, name=node.name, doc=class_doc, source_ref=source_ref
)
class_variable = class_creation_function.getVariableForAssignment("__class__")
class_variable_ref = ExpressionVariableRef(
variable=class_variable, source_ref=source_ref
)
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=node.name,
co_kind="Class",
co_varnames=(),
co_argcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False,
co_filename=parent_module.getRunTimeFilename(),
co_lineno=source_ref.getLineNumber(),
future_spec=parent_module.getFutureSpec(),
)
body = buildFrameNode(
provider=class_creation_function,
nodes=class_statement_nodes,
code_object=code_object,
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
locals_scope = class_creation_function.getFunctionLocalsScope()
statements = [
StatementSetLocals(
locals_scope=locals_scope,
new_locals=ExpressionTempVariableRef(
variable=tmp_prepared, source_ref=source_ref
),
source_ref=source_ref,
),
StatementAssignmentVariableName(
provider=class_creation_function,
variable_name="__module__",
source=makeConstantRefNode(
constant=provider.getParentModule().getFullName(),
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref,
),
]
if class_doc is not None:
statements.append(
StatementAssignmentVariableName(
provider=class_creation_function,
variable_name="__doc__",
source=makeConstantRefNode(
constant=class_doc, source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
)
)
# The "__qualname__" attribute is new in Python 3.3.
if python_version >= 300:
qualname = class_creation_function.getFunctionQualname()
if python_version < 340:
qualname_ref = makeConstantRefNode(
constant=qualname, source_ref=source_ref, user_provided=True
)
else:
qualname_ref = ExpressionFunctionQualnameRef(
function_body=class_creation_function, source_ref=source_ref
)
statements.append(
StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__qualname__",
value=qualname_ref,
source_ref=source_ref,
)
)
if python_version >= 340:
qualname_assign = statements[-1]
if python_version >= 360 and class_creation_function.needsAnnotationsDictionary():
statements.append(
StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__annotations__",
value=makeConstantRefNode(
constant={}, source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
)
)
statements.append(body)
if node.bases:
tmp_bases = provider.allocateTempVariable(temp_scope=temp_scope, name="bases")
if python_version >= 370:
tmp_bases_orig = provider.allocateTempVariable(
temp_scope=temp_scope, name="bases_orig"
)
def makeBasesRef():
return ExpressionTempVariableRef(variable=tmp_bases, source_ref=source_ref)
else:
def makeBasesRef():
return makeConstantRefNode(constant=(), source_ref=source_ref)
if python_version >= 370 and node.bases:
statements.append(
makeStatementConditional(
condition=makeComparisonExpression(
comparator="NotEq",
left=ExpressionTempVariableRef(
variable=tmp_bases, source_ref=source_ref
),
right=ExpressionTempVariableRef(
variable=tmp_bases_orig, source_ref=source_ref
),
source_ref=source_ref,
),
yes_branch=StatementLocalsDictOperationSet(
locals_scope=locals_scope,
variable_name="__orig_bases__",
value=ExpressionTempVariableRef(
variable=tmp_bases_orig, source_ref=source_ref
),
source_ref=source_ref,
),
no_branch=None,
source_ref=source_ref,
)
)
statements += [
StatementAssignmentVariable(
variable=class_variable,
source=makeExpressionCall(
called=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref
),
args=makeSequenceCreationOrConstant(
sequence_kind="tuple",
elements=(
makeConstantRefNode(
constant=node.name,
source_ref=source_ref,
user_provided=True,
),
makeBasesRef(),
ExpressionBuiltinLocalsRef(
locals_scope=locals_scope, 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 = makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=class_creation_function,
tried=mergeStatements(statements, True),
final=StatementReleaseLocals(
locals_scope=locals_scope, source_ref=source_ref
),
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 = class_creation_function
for decorator in buildNodeList(provider, reversed(node.decorator_list), source_ref):
decorated_body = makeExpressionCall(
called=decorator,
args=ExpressionMakeTuple(elements=(decorated_body,), source_ref=source_ref),
kw=None,
source_ref=decorator.getSourceReference(),
)
if node.keywords and node.keywords[-1].arg is None:
keywords = node.keywords[:-1]
else:
keywords = node.keywords
statements = []
if node.bases:
statements.append(
StatementAssignmentVariable(
variable=tmp_bases if python_version < 370 else tmp_bases_orig,
source=buildTupleCreationNode(
provider=provider, elements=node.bases, source_ref=source_ref
),
source_ref=source_ref,
)
)
if python_version >= 370:
bases_conversion = ExpressionFunctionCall(
function=ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(
function_body=getClassBasesMroConversionHelper(),
source_ref=source_ref,
),
defaults=(),
kw_defaults=None,
annotations=None,
source_ref=source_ref,
),
values=(
ExpressionTempVariableRef(
variable=tmp_bases_orig, source_ref=source_ref
),
),
source_ref=source_ref,
)
statements.append(
StatementAssignmentVariable(
variable=tmp_bases, source=bases_conversion, source_ref=source_ref
)
)
statements.append(
StatementAssignmentVariable(
variable=tmp_class_decl_dict,
source=makeDictCreationOrConstant2(
keys=[keyword.arg for keyword in keywords],
values=[
buildNode(provider, keyword.value, source_ref)
for keyword in keywords
],
source_ref=source_ref,
),
source_ref=source_ref,
)
)
if node.keywords and node.keywords[-1].arg is None:
statements.append(
StatementDictOperationUpdate(
dict_arg=ExpressionVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref
),
value=buildNode(provider, node.keywords[-1].value, source_ref),
source_ref=source_ref,
)
)
# Check if there are bases, and if there are, go with the type of the
# first base class as a metaclass unless it was specified in the class
# decl dict of course.
if node.bases:
unspecified_metaclass_expression = ExpressionBuiltinType1(
value=ExpressionSubscriptLookup(
subscribed=ExpressionTempVariableRef(
variable=tmp_bases, source_ref=source_ref
),
subscript=makeConstantRefNode(
constant=0, source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
),
source_ref=source_ref,
)
# Might become empty behind our back during conversion, therefore make the
# check at run time for 3.7 or higher.
if python_version >= 370:
unspecified_metaclass_expression = ExpressionConditional(
condition=ExpressionTempVariableRef(
variable=tmp_bases, source_ref=source_ref
),
expression_yes=unspecified_metaclass_expression,
expression_no=makeExpressionBuiltinRef(
builtin_name="type", source_ref=source_ref
),
source_ref=source_ref,
)
else:
unspecified_metaclass_expression = makeExpressionBuiltinRef(
builtin_name="type", source_ref=source_ref
)
call_prepare = StatementAssignmentVariable(
variable=tmp_prepared,
source=makeExpressionCall(
called=ExpressionAttributeLookup(
source=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref
),
attribute_name="__prepare__",
source_ref=source_ref,
),
args=ExpressionMakeTuple(
elements=(
makeConstantRefNode(
constant=node.name, source_ref=source_ref, user_provided=True
),
makeBasesRef(),
),
source_ref=source_ref,
),
kw=ExpressionTempVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref
),
source_ref=source_ref,
),
source_ref=source_ref,
)
if python_version >= 360:
call_prepare = makeStatementsSequenceFromStatements(
call_prepare,
makeStatementConditional(
condition=ExpressionAttributeCheck(
object_arg=ExpressionTempVariableRef(
variable=tmp_prepared, source_ref=source_ref
),
attribute_name="__getitem__",
source_ref=source_ref,
),
yes_branch=None,
no_branch=makeRaiseExceptionExpressionFromTemplate(
exception_type="TypeError",
template="%s.__prepare__() must return a mapping, not %s",
template_args=(
ExpressionBuiltinGetattr(
object_arg=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref
),
name=makeConstantRefNode(
constant="__name__", source_ref=source_ref
),
default=makeConstantRefNode(
constant="<metaclass>", source_ref=source_ref
),
source_ref=source_ref,
),
ExpressionAttributeLookup(
source=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=tmp_prepared, source_ref=source_ref
),
source_ref=source_ref,
),
attribute_name="__name__",
source_ref=source_ref,
),
),
source_ref=source_ref,
).asStatement(),
source_ref=source_ref,
),
)
statements += [
StatementAssignmentVariable(
variable=tmp_metaclass,
source=ExpressionSelectMetaclass(
metaclass=ExpressionConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(
constant="metaclass",
source_ref=source_ref,
user_provided=True,
),
dict_arg=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=makeConstantRefNode(
constant="metaclass",
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref,
),
expression_no=unspecified_metaclass_expression,
source_ref=source_ref,
),
bases=makeBasesRef(),
source_ref=source_ref,
),
source_ref=source_ref_orig,
),
makeStatementConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(
constant="metaclass", source_ref=source_ref, user_provided=True
),
dict_arg=ExpressionTempVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref
),
source_ref=source_ref,
),
no_branch=None,
yes_branch=StatementDictOperationRemove(
dict_arg=ExpressionTempVariableRef(
variable=tmp_class_decl_dict, source_ref=source_ref
),
key=makeConstantRefNode(
constant="metaclass", source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
),
source_ref=source_ref,
),
makeStatementConditional(
condition=ExpressionAttributeCheck(
object_arg=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref
),
attribute_name="__prepare__",
source_ref=source_ref,
),
yes_branch=call_prepare,
no_branch=StatementAssignmentVariable(
variable=tmp_prepared,
source=makeConstantRefNode(
constant={}, source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
source=decorated_body,
source_ref=source_ref,
),
]
if python_version >= 340:
class_creation_function.qualname_setup = node.name, qualname_assign
final = [tmp_class_decl_dict, tmp_metaclass, tmp_prepared]
if node.bases:
final.insert(0, tmp_bases)
if python_version >= 370:
final.insert(0, tmp_bases_orig)
return makeTryFinallyStatement(
provider=provider,
tried=statements,
final=tuple(
StatementReleaseVariable(variable=variable, source_ref=source_ref)
for variable in final
),
source_ref=source_ref,
)
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_statement_nodes, 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,
name = node.name,
doc = class_doc,
flags = set(),
source_ref = source_ref
)
if 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
)
code_object = CodeObjectSpec(
co_name = node.name,
co_kind = "Class",
co_varnames = (),
co_argcount = 0,
co_kwonlyargcount = 0,
co_has_starlist = False,
co_has_stardict = False
)
body = buildFrameNode(
provider = class_creation_function,
nodes = class_statement_nodes,
code_object = code_object,
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 = makeConstantRefNode(
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 = makeConstantRefNode(
constant = class_doc,
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
)
)
# The "__qualname__" attribute is new in Python 3.3.
if python_version >= 330:
qualname = class_creation_function.getFunctionQualname()
qualname_variable = class_creation_function.getVariableForAssignment(
"__qualname__"
)
if python_version < 340:
qualname_ref = makeConstantRefNode(
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 python_version >= 340:
qualname_assign = statements[-1]
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 = (
makeConstantRefNode(
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)
class_creation_function.registerProvidedVariable(tmp_bases)
class_creation_function.registerProvidedVariable(tmp_class_decl_dict)
class_creation_function.registerProvidedVariable(tmp_metaclass)
class_creation_function.registerProvidedVariable(tmp_prepared)
# 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
),
code_object = code_object,
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 = [
makeConstantRefNode(
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
],
source_ref = source_ref
),
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_metaclass,
source_ref = source_ref
),
source = ExpressionSelectMetaclass(
metaclass = ExpressionConditional(
condition = ExpressionComparisonIn(
left = makeConstantRefNode(
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 = makeConstantRefNode(
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 = makeConstantRefNode(
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 = ExpressionComparisonIn(
left = makeConstantRefNode(
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 = makeConstantRefNode(
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 = makeConstantRefNode(
constant = "__prepare__",
source_ref = source_ref,
user_provided = True
),
source_ref = source_ref
),
expression_no = makeConstantRefNode(
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 = (
makeConstantRefNode(
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 python_version >= 340:
class_assign = statements[-1]
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):
# This function is the Python2 special case with special re-formulation as
# according to developer manual, and it's very detailed, pylint: disable=R0914
class_statement_nodes, class_doc = extractDocFromBody(node)
function_body = ExpressionClassBody(
provider = provider,
name = node.name,
doc = class_doc,
flags = set(),
source_ref = source_ref
)
code_object = CodeObjectSpec(
co_name = node.name,
co_kind = "Class",
co_varnames = (),
co_argcount = 0,
co_kwonlyargcount = 0,
co_has_starlist = False,
co_has_stardict = False
)
body = buildFrameNode(
provider = function_body,
nodes = class_statement_nodes,
code_object = code_object,
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 = makeConstantRefNode(
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 = makeConstantRefNode(
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
),
code_object = None,
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 = ExpressionComparisonIn(
left = makeConstantRefNode(
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 = makeConstantRefNode(
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 = (
makeConstantRefNode(
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
)
def buildClassNode2(provider, node, source_ref):
# This function is the Python2 special case with special re-formulation as
# according to developer manual, and it's very detailed, pylint: disable=too-many-locals
class_statement_nodes, class_doc = extractDocFromBody(node)
function_body = ExpressionClassBody(
provider=provider, name=node.name, doc=class_doc, source_ref=source_ref
)
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=node.name,
co_kind="Class",
co_varnames=(),
co_argcount=0,
co_kwonlyargcount=0,
co_has_starlist=False,
co_has_stardict=False,
co_filename=parent_module.getRunTimeFilename(),
co_lineno=source_ref.getLineNumber(),
future_spec=parent_module.getFutureSpec(),
)
body = buildFrameNode(
provider=function_body,
nodes=class_statement_nodes,
code_object=code_object,
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()
locals_scope = function_body.getFunctionLocalsScope()
# 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 = [
StatementSetLocalsDictionary(locals_scope=locals_scope, source_ref=source_ref),
StatementAssignmentVariableName(
provider=function_body,
variable_name="__module__",
source=makeConstantRefNode(
constant=provider.getParentModule().getFullName(),
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref.atInternal(),
),
]
if class_doc is not None:
statements.append(
StatementAssignmentVariableName(
provider=function_body,
variable_name="__doc__",
source=makeConstantRefNode(
constant=class_doc, source_ref=source_ref, user_provided=True
),
source_ref=source_ref.atInternal(),
)
)
statements += [
body,
StatementReturn(
expression=ExpressionBuiltinLocalsRef(
locals_scope=locals_scope, source_ref=source_ref
),
source_ref=source_ref,
),
]
body = makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=function_body,
tried=mergeStatements(statements, True),
final=StatementReleaseLocals(
locals_scope=locals_scope, source_ref=source_ref
),
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")
select_metaclass = ExpressionOutlineBody(
provider=provider, name="select_metaclass", body=None, source_ref=source_ref
)
if node.bases:
tmp_base = select_metaclass.allocateTempVariable(temp_scope=None, name="base")
statements = (
StatementAssignmentVariable(
variable=tmp_base,
source=ExpressionSubscriptLookup(
subscribed=ExpressionTempVariableRef(
variable=tmp_bases, source_ref=source_ref
),
subscript=makeConstantRefNode(
constant=0, source_ref=source_ref, user_provided=True
),
source_ref=source_ref,
),
source_ref=source_ref,
),
makeTryFinallyStatement(
provider,
tried=StatementTry(
tried=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionAttributeLookup(
source=ExpressionTempVariableRef(
variable=tmp_base, source_ref=source_ref
),
attribute_name="__class__",
source_ref=source_ref,
),
source_ref=source_ref,
)
),
except_handler=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=tmp_base, source_ref=source_ref
),
source_ref=source_ref,
),
source_ref=source_ref,
)
),
break_handler=None,
continue_handler=None,
return_handler=None,
source_ref=source_ref,
),
final=StatementReleaseVariable(
variable=tmp_base, source_ref=source_ref
),
source_ref=source_ref,
public_exc=False,
),
)
else:
statements = (
StatementTry(
tried=makeStatementsSequenceFromStatement(
statement=StatementReturn(
# TODO: Should avoid checking __builtins__ for this.
expression=ExpressionVariableNameRef(
variable_name="__metaclass__",
provider=parent_module,
source_ref=source_ref,
),
source_ref=source_ref,
)
),
except_handler=makeStatementsSequenceFromStatement(
statement=StatementReturn(
expression=ExpressionBuiltinAnonymousRef(
builtin_name="classobj", source_ref=source_ref
),
source_ref=source_ref,
)
),
break_handler=None,
continue_handler=None,
return_handler=None,
source_ref=source_ref,
),
)
select_metaclass.setBody(
makeStatementsSequence(
statements=statements, allow_none=False, source_ref=source_ref
)
)
statements = [
StatementAssignmentVariable(
variable=tmp_bases,
source=makeSequenceCreationOrConstant(
sequence_kind="tuple",
elements=buildNodeList(
provider=provider, nodes=node.bases, source_ref=source_ref
),
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariable(
variable=tmp_class_dict, source=function_body, source_ref=source_ref
),
StatementAssignmentVariable(
variable=tmp_metaclass,
source=ExpressionConditional(
condition=ExpressionDictOperationIn(
key=makeConstantRefNode(
constant="__metaclass__",
source_ref=source_ref,
user_provided=True,
),
dict_arg=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=makeConstantRefNode(
constant="__metaclass__",
source_ref=source_ref,
user_provided=True,
),
source_ref=source_ref,
),
expression_no=select_metaclass,
source_ref=source_ref,
),
source_ref=source_ref,
),
StatementAssignmentVariable(
variable=tmp_class,
source=makeExpressionCall(
called=ExpressionTempVariableRef(
variable=tmp_metaclass, source_ref=source_ref
),
args=ExpressionMakeTuple(
elements=(
makeConstantRefNode(
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,
),
kw=None,
source_ref=source_ref,
),
source_ref=source_ref,
),
]
for decorator in buildNodeList(provider, reversed(node.decorator_list), source_ref):
statements.append(
StatementAssignmentVariable(
variable=tmp_class,
source=makeExpressionCall(
called=decorator,
args=ExpressionMakeTuple(
elements=(
ExpressionTempVariableRef(
variable=tmp_class, source_ref=source_ref
),
),
source_ref=source_ref,
),
kw=None,
source_ref=decorator.getSourceReference(),
),
source_ref=decorator.getSourceReference(),
)
)
statements.append(
StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
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
)
