def _wrapFunctionWithSpecialNestedArgs(name, outer_body, parameters,
special_args, source_ref):
inner_name = name.strip("<>") + "$inner"
iter_vars = []
values = []
statements = []
def unpackFrom(source, arg_names):
accesses = []
sub_special_index = 0
iter_var = outer_body.allocateTempVariable(
None, "arg_iter_%d" % len(iter_vars))
iter_vars.append(iter_var)
statements.append(
StatementAssignmentVariable(
variable=iter_var,
source=ExpressionBuiltinIter1(value=source,
source_ref=source_ref),
source_ref=source_ref,
))
for element_index, arg_name in enumerate(arg_names):
if getKind(arg_name) == "Name":
arg_var = outer_body.createProvidedVariable(arg_name.id)
outer_body.getLocalsScope().registerProvidedVariable(arg_var)
statements.append(
StatementAssignmentVariable(
variable=arg_var,
source=ExpressionSpecialUnpack(
value=ExpressionTempVariableRef(
variable=iter_var, source_ref=source_ref),
count=element_index + 1,
expected=len(arg_names),
starred=False,
source_ref=source_ref,
),
source_ref=source_ref,
))
accesses.append(
ExpressionVariableRef(variable=arg_var,
source_ref=source_ref))
elif getKind(arg_name) == "Tuple":
accesses.extend(
unpackFrom(
source=ExpressionSpecialUnpack(
value=ExpressionTempVariableRef(
variable=iter_var, source_ref=source_ref),
count=element_index + 1,
expected=len(arg_names),
starred=False,
source_ref=source_ref,
),
arg_names=arg_name.elts,
))
sub_special_index += 1
else:
assert False, arg_name
statements.append(
StatementSpecialUnpackCheck(
iterator=ExpressionTempVariableRef(variable=iter_var,
source_ref=source_ref),
count=len(arg_names),
source_ref=source_ref,
))
return accesses
for arg_name in parameters.getParameterNames():
if arg_name.startswith("."):
source = ExpressionVariableNameRef(provider=outer_body,
variable_name=arg_name,
source_ref=source_ref)
values.extend(unpackFrom(source, special_args[arg_name]))
else:
values.append(
ExpressionVariableNameRef(provider=outer_body,
variable_name=arg_name,
source_ref=source_ref))
code_body = ExpressionOutlineFunction(provider=outer_body,
name=inner_name,
source_ref=source_ref)
statements.append(
StatementReturn(expression=code_body, source_ref=source_ref))
outer_body.setBody(
makeStatementsSequenceFromStatement(statement=makeTryFinallyStatement(
provider=outer_body,
tried=statements,
final=[
StatementReleaseVariable(variable=variable,
source_ref=source_ref)
for variable in sorted(
outer_body.getTempVariables(),
key=lambda variable: variable.getName(),
)
],
source_ref=source_ref,
public_exc=False,
)))
return code_body
def buildFunctionNode(provider, node, source_ref):
# Functions have way too many details, pylint: disable=too-many-locals
assert getKind(node) == "FunctionDef"
function_statement_nodes, function_doc = extractDocFromBody(node)
function_kind, flags = detectFunctionBodyKind(
nodes=function_statement_nodes)
function_body, code_body, code_object = buildFunctionWithParsing(
provider=provider,
function_kind=function_kind,
name=node.name,
function_doc=function_doc,
flags=flags,
node=node,
source_ref=source_ref,
)
if function_kind in ("Generator", "Coroutine"):
if function_kind == "Coroutine":
code_body = ExpressionCoroutineObjectBody(
provider=function_body,
name=node.name,
code_object=code_object,
flags=flags,
auto_release=None,
source_ref=source_ref,
)
maker_class = ExpressionMakeCoroutineObject
else:
code_body = ExpressionGeneratorObjectBody(
provider=function_body,
name=node.name,
code_object=code_object,
flags=flags,
auto_release=None,
source_ref=source_ref,
)
maker_class = ExpressionMakeGeneratorObject
code_body.qualname_provider = provider
for variable in function_body.getProvidedVariables():
code_body.getVariableForReference(variable.getName())
function_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementReturn(
expression=maker_class(
ExpressionFunctionRef(function_body=code_body,
source_ref=source_ref),
source_ref=source_ref,
),
source_ref=source_ref,
)))
decorators = buildNodeList(provider=provider,
nodes=reversed(node.decorator_list),
source_ref=source_ref)
defaults = buildNodeList(provider=provider,
nodes=node.args.defaults,
source_ref=source_ref)
kw_defaults = buildParameterKwDefaults(provider=provider,
node=node,
function_body=function_body,
source_ref=source_ref)
function_statements_body = buildFrameNode(
provider=code_body,
nodes=function_statement_nodes,
code_object=code_object,
source_ref=source_ref,
)
if function_kind == "Function":
# TODO: Generators might have to raise GeneratorExit instead.
function_statements_body = _insertFinalReturnStatement(
function_statements_body=function_statements_body,
return_statement=StatementReturnNone(source_ref=source_ref),
)
if "has_exec" in flags:
function_statements_body = _insertInitialSetLocalsDictStatement(
function_body=code_body,
function_statements_body=function_statements_body)
if function_statements_body.isStatementsFrame():
function_statements_body = makeStatementsSequenceFromStatement(
statement=function_statements_body)
code_body.setBody(function_statements_body)
annotations = buildParameterAnnotations(provider, node, source_ref)
function_creation = ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(function_body=function_body,
source_ref=source_ref),
defaults=defaults,
kw_defaults=kw_defaults,
annotations=annotations,
source_ref=source_ref,
)
# Add the "staticmethod" decorator to __new__ methods if not provided.
# CPython made these optional, but secretly applies them when it does
# "class __new__". We add them earlier, so our optimization will see it.
if (python_version < 300 and node.name == "__new__"
and provider.isExpressionClassBody()):
_injectDecorator(decorators, "staticmethod",
("staticmethod", "classmethod"), source_ref)
# Add the "classmethod" decorator to __init_subclass__ methods if not provided.
if (python_version >= 360 and node.name == "__init_subclass__"
and provider.isExpressionClassBody()):
_injectDecorator(decorators, "classmethod", ("classmethod", ),
source_ref)
if (python_version >= 370 and node.name == "__class_getitem__"
and provider.isExpressionClassBody()):
_injectDecorator(decorators, "classmethod", ("classmethod", ),
source_ref)
decorated_function = function_creation
for decorator in decorators:
decorated_function = makeCallNode(decorator, decorated_function,
decorator.getSourceReference())
result = StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
source=decorated_function,
source_ref=source_ref,
)
if python_version >= 340:
function_body.qualname_setup = result.getVariableName()
return result
def buildAsyncFunctionNode(provider, node, source_ref):
# We are creating a function here that creates coroutine objects, with
# many details each, pylint: disable=too-many-locals
assert getKind(node) == "AsyncFunctionDef"
function_statement_nodes, function_doc = extractDocFromBody(node)
function_kind, flags = detectFunctionBodyKind(
nodes=function_statement_nodes, start_value="Coroutine")
creator_function_body, _, code_object = buildFunctionWithParsing(
provider=provider,
function_kind=function_kind,
name=node.name,
function_doc=function_doc,
flags=(),
node=node,
source_ref=source_ref,
)
if function_kind == "Coroutine":
function_body = ExpressionCoroutineObjectBody(
provider=creator_function_body,
name=node.name,
code_object=code_object,
flags=flags,
auto_release=None,
source_ref=source_ref,
)
else:
function_body = ExpressionAsyncgenObjectBody(
provider=creator_function_body,
name=node.name,
code_object=code_object,
flags=flags,
auto_release=None,
source_ref=source_ref,
)
function_body.qualname_provider = provider
for variable in creator_function_body.getProvidedVariables():
function_body.getVariableForReference(variable.getName())
decorators = buildNodeList(provider=provider,
nodes=reversed(node.decorator_list),
source_ref=source_ref)
defaults = buildNodeList(provider=provider,
nodes=node.args.defaults,
source_ref=source_ref)
function_statements_body = buildFrameNode(
provider=function_body,
nodes=function_statement_nodes,
code_object=code_object,
source_ref=source_ref,
)
function_statements_body = _insertFinalReturnStatement(
function_statements_body=function_statements_body,
return_statement=StatementGeneratorReturnNone(source_ref=source_ref),
)
if function_statements_body.isStatementsFrame():
function_statements_body = makeStatementsSequenceFromStatement(
statement=function_statements_body)
function_body.setBody(function_statements_body)
annotations = buildParameterAnnotations(provider, node, source_ref)
kw_defaults = buildParameterKwDefaults(
provider=provider,
node=node,
function_body=creator_function_body,
source_ref=source_ref,
)
if function_kind == "Coroutine":
creation_node = ExpressionMakeCoroutineObject(
coroutine_ref=ExpressionFunctionRef(function_body=function_body,
source_ref=source_ref),
source_ref=source_ref,
)
else:
creation_node = ExpressionMakeAsyncgenObject(
asyncgen_ref=ExpressionFunctionRef(function_body=function_body,
source_ref=source_ref),
source_ref=source_ref,
)
creator_function_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementReturn(
expression=creation_node, source_ref=source_ref)))
function_creation = ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(function_body=creator_function_body,
source_ref=source_ref),
defaults=defaults,
kw_defaults=kw_defaults,
annotations=annotations,
source_ref=source_ref,
)
decorated_function = function_creation
for decorator in decorators:
decorated_function = makeCallNode(decorator, decorated_function,
decorator.getSourceReference())
result = StatementAssignmentVariableName(
provider=provider,
variable_name=mangleName(node.name, provider),
source=decorated_function,
source_ref=source_ref,
)
function_body.qualname_setup = result.getVariableName()
# Share the non-local declarations. TODO: This may also apply to generators
# and async generators.
creator_function_body.non_local_declarations = function_body.non_local_declarations
return result
def _buildContractionNode(provider, node, name, emit_class, start_value,
source_ref):
# The contraction nodes are reformulated to function bodies, with loops as
# described in the developer manual. They use a lot of temporary names,
# nested blocks, etc. and so a lot of variable names.
# TODO: No function ought to be necessary, only a variable scope is.
function_body = ExpressionFunctionBody(provider=provider,
name=name,
doc=None,
parameters=ParameterSpec(
ps_name=name,
ps_normal_args=(".0", ),
ps_list_star_arg=None,
ps_dict_star_arg=None,
ps_default_count=0,
ps_kw_only_args=()),
flags=set(),
source_ref=source_ref)
iter_tmp = function_body.getVariableForAssignment(variable_name=".0")
assert iter_tmp.isParameterVariable()
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=name,
co_kind="Function",
co_varnames=function_body.getParameters().getParameterNames(),
co_argcount=len(function_body.getParameters().getParameterNames()),
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())
container_tmp = function_body.allocateTempVariable(
temp_scope=None, name="contraction_result")
statements, release_statements = _buildContractionBodyNode(
function_body=function_body,
provider=provider,
node=node,
emit_class=emit_class,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=start_value,
container_tmp=container_tmp,
assign_provider=False,
source_ref=source_ref,
)
assert start_value
statements.append(
StatementReturn(expression=ExpressionTempVariableRef(
variable=container_tmp, source_ref=source_ref),
source_ref=source_ref))
statements = (makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal()), )
function_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementsFrameFunction(
statements=mergeStatements(statements, False),
code_object=code_object,
source_ref=source_ref)))
return ExpressionFunctionCall(function=ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(function_body=function_body,
source_ref=source_ref),
code_object=code_object,
defaults=(),
kw_defaults=None,
annotations=None,
source_ref=source_ref),
values=(ExpressionBuiltinIter1(
value=buildNode(
provider=provider,
node=node.generators[0].iter,
source_ref=source_ref),
source_ref=source_ref), ),
source_ref=source_ref)
def getSetUnpackingHelper():
helper_name = "_unpack_set"
result = makeInternalHelperFunctionBody(
name=helper_name,
parameters=ParameterSpec(
ps_name=helper_name,
ps_normal_args=(),
ps_list_star_arg="args",
ps_dict_star_arg=None,
ps_default_count=0,
ps_kw_only_args=(),
ps_pos_only_args=(),
),
)
temp_scope = None
tmp_result_variable = result.allocateTempVariable(temp_scope, "set")
tmp_iter_variable = result.allocateTempVariable(temp_scope, "iter")
tmp_item_variable = result.allocateTempVariable(temp_scope, "keys")
loop_body = makeStatementsSequenceFromStatements(
makeTryExceptSingleHandlerNode(
tried=StatementAssignmentVariable(
variable=tmp_item_variable,
source=ExpressionBuiltinNext1(
value=ExpressionTempVariableRef(
variable=tmp_iter_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
exception_name="StopIteration",
handler_body=StatementLoopBreak(source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
StatementExpressionOnly(
expression=ExpressionSetOperationUpdate(
set_arg=ExpressionTempVariableRef(
variable=tmp_result_variable,
source_ref=internal_source_ref),
value=ExpressionTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
)
args_variable = result.getVariableForAssignment(variable_name="args")
final = (
StatementReleaseVariable(variable=tmp_result_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_iter_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_item_variable,
source_ref=internal_source_ref),
)
tried = makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable=tmp_iter_variable,
source=ExpressionBuiltinIter1(
value=ExpressionVariableRef(variable=args_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
StatementAssignmentVariable(
variable=tmp_result_variable,
source=makeConstantRefNode(constant=set(),
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
StatementLoop(body=loop_body, source_ref=internal_source_ref),
StatementReturn(
expression=ExpressionTempVariableRef(
variable=tmp_result_variable, source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
)
result.setBody(
makeStatementsSequenceFromStatement(
makeTryFinallyStatement(
provider=result,
tried=tried,
final=final,
source_ref=internal_source_ref,
)))
return result
def buildCallNode(provider, node, source_ref):
called = buildNode(provider, node.func, source_ref)
if python_version >= 350:
list_star_arg = None
dict_star_arg = None
positional_args = []
# For Python3.5 compatibility, the error handling with star argument last
# is the old one, only with a starred argument before that, things use the
# new unpacking code.
for node_arg in node.args[:-1]:
if getKind(node_arg) == "Starred":
assert python_version >= 350
list_star_arg = buildListUnpacking(provider, node.args, source_ref)
positional_args = []
break
else:
if node.args and getKind(node.args[-1]) == "Starred":
assert python_version >= 350
list_star_arg = buildNode(provider, node.args[-1].value,
source_ref)
positional_args = buildNodeList(provider, node.args[:-1],
source_ref)
else:
positional_args = buildNodeList(provider, node.args, source_ref)
# Only the values of keyword pairs have a real source ref, and those only
# really matter, so that makes sense.
keys = []
values = []
for keyword in node.keywords[:-1]:
if keyword.arg is None:
assert python_version >= 350
outline_body = ExpressionOutlineBody(provider=provider,
name="dict_unpacking_call",
source_ref=source_ref)
tmp_called = outline_body.allocateTempVariable(temp_scope=None,
name="called")
helper_args = [
ExpressionTempVariableRef(variable=tmp_called,
source_ref=source_ref),
ExpressionMakeTuple(elements=buildDictionaryUnpackingArgs(
provider=provider,
keys=(keyword.arg for keyword in node.keywords),
values=(keyword.value for keyword in node.keywords),
source_ref=source_ref),
source_ref=source_ref)
]
dict_star_arg = ExpressionFunctionCall(
function=ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(
function_body=getFunctionCallHelperDictionaryUnpacking(
),
source_ref=source_ref),
code_object=None,
defaults=(),
kw_defaults=None,
annotations=None,
source_ref=source_ref),
values=helper_args,
source_ref=source_ref,
)
outline_body.setBody(
makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_called, source_ref=source_ref),
source=called,
source_ref=source_ref),
StatementReturn(expression=_makeCallNode(
called=ExpressionTempVariableRef(
variable=tmp_called, source_ref=source_ref),
positional_args=positional_args,
keys=keys,
values=values,
list_star_arg=list_star_arg,
dict_star_arg=dict_star_arg,
source_ref=source_ref,
),
source_ref=source_ref)))
return outline_body
# For Python3.5 compatibility, the error handling with star argument last
# is the old one, only with a starred argument before that, things use the
# new unpacking code.
if node.keywords and node.keywords[-1].arg is None:
assert python_version >= 350
dict_star_arg = buildNode(provider, node.keywords[-1].value,
source_ref)
keywords = node.keywords[:-1]
else:
keywords = node.keywords
for keyword in keywords:
keys.append(
makeConstantRefNode(constant=keyword.arg,
source_ref=source_ref,
user_provided=True))
values.append(buildNode(provider, keyword.value, source_ref))
if python_version < 350:
list_star_arg = buildNode(provider, node.starargs, source_ref, True)
dict_star_arg = buildNode(provider, node.kwargs, source_ref, True)
return _makeCallNode(
called=called,
positional_args=positional_args,
keys=keys,
values=values,
list_star_arg=list_star_arg,
dict_star_arg=dict_star_arg,
source_ref=source_ref,
)
def buildGeneratorExpressionNode(provider, node, source_ref):
# Generator expressions are dealt with by general code.
assert getKind(node) == "GeneratorExp"
function_body = ExpressionOutlineBody(provider=provider,
name="genexpr",
source_ref=source_ref)
iter_tmp = function_body.allocateTempVariable(temp_scope=None, name=".0")
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name="<genexpr>",
co_kind="Generator",
co_varnames=(".0", ),
co_argcount=1,
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())
code_body = ExpressionGeneratorObjectBody(provider=provider,
name="<genexpr>",
flags=set(),
source_ref=source_ref)
function_body.setBody(
makeStatementsSequenceFromStatements(
StatementAssignmentVariable(variable=iter_tmp,
source=ExpressionBuiltinIter1(
value=buildNode(
provider=provider,
node=node.generators[0].iter,
source_ref=source_ref),
source_ref=source_ref),
source_ref=source_ref),
makeTryFinallyStatement(
provider=function_body,
tried=StatementReturn(expression=ExpressionMakeGeneratorObject(
generator_ref=ExpressionFunctionRef(
function_body=code_body, source_ref=source_ref),
code_object=code_object,
source_ref=source_ref),
source_ref=source_ref),
final=StatementReleaseVariable(variable=iter_tmp,
source_ref=source_ref),
source_ref=source_ref)))
statements, release_statements = _buildContractionBodyNode(
function_body=code_body,
provider=provider,
node=node,
emit_class=ExpressionYield,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=None,
container_tmp=None,
assign_provider=False,
source_ref=source_ref,
)
statements = (makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal()), )
code_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementsFrameGenerator(
statements=mergeStatements(statements, False),
code_object=code_object,
source_ref=source_ref)))
return function_body
def getClassBasesMroConversionHelper():
helper_name = "_mro_entries_conversion"
result = makeInternalHelperFunctionBody(
name=helper_name,
parameters=ParameterSpec(
ps_name=helper_name,
ps_normal_args=("bases", ),
ps_pos_only_args=(),
ps_list_star_arg=None,
ps_dict_star_arg=None,
ps_default_count=0,
ps_kw_only_args=(),
),
inline_const_args=False, # TODO: Allow this.
)
temp_scope = None
tmp_result_variable = result.allocateTempVariable(temp_scope, "list")
tmp_iter_variable = result.allocateTempVariable(temp_scope, "iter")
tmp_item_variable = result.allocateTempVariable(temp_scope, "base")
args_variable = result.getVariableForAssignment(variable_name="bases")
non_type_case = makeStatementConditional(
condition=ExpressionAttributeCheck(
expression=ExpressionTempVariableRef(
variable=tmp_item_variable, source_ref=internal_source_ref),
attribute_name="__mro_entries__",
source_ref=internal_source_ref,
),
yes_branch=StatementExpressionOnly(
expression=ExpressionListOperationExtend(
list_arg=ExpressionTempVariableRef(
variable=tmp_result_variable,
source_ref=internal_source_ref),
value=makeExpressionCall(
called=ExpressionAttributeLookup(
expression=ExpressionTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
attribute_name="__mro_entries__",
source_ref=internal_source_ref,
),
args=makeExpressionMakeTuple(
elements=(ExpressionVariableRef(
variable=args_variable,
source_ref=internal_source_ref), ),
source_ref=internal_source_ref,
),
kw=None,
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
no_branch=StatementListOperationAppend(
list_arg=ExpressionTempVariableRef(variable=tmp_result_variable,
source_ref=internal_source_ref),
value=ExpressionTempVariableRef(variable=tmp_item_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
)
type_case = StatementListOperationAppend(
list_arg=ExpressionTempVariableRef(variable=tmp_result_variable,
source_ref=internal_source_ref),
value=ExpressionTempVariableRef(variable=tmp_item_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
)
loop_body = makeStatementsSequenceFromStatements(
makeTryExceptSingleHandlerNode(
tried=StatementAssignmentVariable(
variable=tmp_item_variable,
source=ExpressionBuiltinNext1(
value=ExpressionTempVariableRef(
variable=tmp_iter_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
exception_name="StopIteration",
handler_body=StatementLoopBreak(source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
makeStatementConditional(
condition=ExpressionBuiltinIsinstance(
instance=ExpressionTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
classes=makeConstantRefNode(constant=type,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
yes_branch=type_case,
no_branch=non_type_case,
source_ref=internal_source_ref,
),
)
final = (
StatementReleaseVariable(variable=args_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_result_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_iter_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_item_variable,
source_ref=internal_source_ref),
)
tried = makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable=tmp_iter_variable,
source=ExpressionBuiltinIter1(
value=ExpressionVariableRef(variable=args_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
StatementAssignmentVariable(
variable=tmp_result_variable,
source=makeConstantRefNode(constant=[],
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
StatementLoop(loop_body=loop_body, source_ref=internal_source_ref),
StatementReturn(
expression=ExpressionBuiltinTuple(
value=ExpressionTempVariableRef(
variable=tmp_result_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref,
),
source_ref=internal_source_ref,
),
)
result.setChild(
"body",
makeStatementsSequenceFromStatement(
makeTryFinallyStatement(
provider=result,
tried=tried,
final=final,
source_ref=internal_source_ref,
)),
)
return result
def buildFunctionNode(provider, node, source_ref):
assert getKind(node) == "FunctionDef"
function_statements, function_doc = extractDocFromBody(node)
function_body = ExpressionFunctionBody(provider=provider,
name=node.name,
doc=function_doc,
parameters=buildParameterSpec(
node.name, node, source_ref),
source_ref=source_ref)
# Hack:
function_body.parent = provider
decorators = buildNodeList(provider, reversed(node.decorator_list),
source_ref)
defaults = buildNodeList(provider, node.args.defaults, source_ref)
kw_defaults = buildParameterKwDefaults(provider, node, function_body,
source_ref)
function_statements_body = buildStatementsNode(provider=function_body,
nodes=function_statements,
frame=True,
source_ref=source_ref)
if function_body.isExpressionFunctionBody() and function_body.isGenerator(
):
# TODO: raise generator exit?
pass
elif function_statements_body is None:
function_statements_body = makeStatementsSequenceFromStatement(
statement=StatementReturn(expression=ExpressionConstantRef(
constant=None, source_ref=source_ref.atInternal()),
source_ref=source_ref.atInternal()))
elif not function_statements_body.isStatementAborting():
function_statements_body.setStatements(
function_statements_body.getStatements() +
(StatementReturn(expression=ExpressionConstantRef(
constant=None, source_ref=source_ref),
source_ref=source_ref.atInternal()), ))
function_body.setBody(function_statements_body)
annotations = buildParameterAnnotations(provider, node, source_ref)
decorated_body = ExpressionFunctionCreation(
function_ref=ExpressionFunctionRef(function_body,
source_ref=source_ref),
defaults=defaults,
kw_defaults=kw_defaults,
annotations=annotations,
source_ref=source_ref)
# Add the staticmethod decorator to __new__ methods if not provided.
# CPython made these optional, but applies them to every class __new__. We add them
# early, so our optimization will see it.
if node.name == "__new__" and not decorators and \
provider.isExpressionFunctionBody() and provider.isClassDictCreation():
decorators = (ExpressionBuiltinRef(builtin_name="staticmethod",
source_ref=source_ref), )
for decorator in decorators:
decorated_body = ExpressionCallNoKeywords(
called=decorator,
args=ExpressionMakeTuple(elements=(decorated_body, ),
source_ref=source_ref),
source_ref=decorator.getSourceReference())
return StatementAssignmentVariable(
variable_ref=ExpressionTargetVariableRef(variable_name=node.name,
source_ref=source_ref),
source=decorated_body,
source_ref=source_ref)
def _buildContractionNode(provider, node, name, emit_class, start_value,
assign_provider, source_ref):
# The contraction nodes are reformulated to function bodies, with loops as described
# in the developer manual. They use a lot of temporary names, nested blocks, etc. and
# so a lot of variable names. There is no good way around that, and we deal with many
# cases, due to having generator expressions sharing this code,
# pylint: disable=R0912,R0914
# Note: The assign_provider is only to cover Python2 list contractions, assigning one
# of the loop variables to the outside scope.
assert provider.isParentVariableProvider(), provider
function_body = ExpressionFunctionBody(
provider=provider,
name=name,
doc=None,
parameters=make_contraction_parameters,
source_ref=source_ref)
temp_block = StatementTempBlock(source_ref=source_ref)
if start_value is not None:
container_tmp = temp_block.getTempVariable("result")
statements = [
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=container_tmp.makeReference(temp_block),
source_ref=source_ref),
source=start_value,
source_ref=source_ref.atInternal())
]
else:
statements = []
if hasattr(node, "elt"):
if start_value is not None:
current_body = emit_class(ExpressionTempVariableRef(
variable=container_tmp.makeReference(temp_block),
source_ref=source_ref),
buildNode(provider=function_body,
node=node.elt,
source_ref=source_ref),
source_ref=source_ref)
else:
assert emit_class is ExpressionYield
function_body.markAsGenerator()
current_body = emit_class(buildNode(provider=function_body,
node=node.elt,
source_ref=source_ref),
source_ref=source_ref)
else:
assert emit_class is ExpressionDictOperationSet
current_body = emit_class(ExpressionTempVariableRef(
variable=container_tmp.makeReference(temp_block),
source_ref=source_ref),
key=buildNode(
provider=function_body,
node=node.key,
source_ref=source_ref,
),
value=buildNode(
provider=function_body,
node=node.value,
source_ref=source_ref,
),
source_ref=source_ref)
current_body = StatementExpressionOnly(expression=current_body,
source_ref=source_ref)
for qual in reversed(node.generators):
nested_temp_block = StatementTempBlock(source_ref=source_ref)
tmp_iter_variable = nested_temp_block.getTempVariable(
"contraction_iter")
tmp_value_variable = nested_temp_block.getTempVariable("iter_value")
# The first iterated value is to be calculated outside of the function and
# will be given as a parameter "_iterated".
if qual is node.generators[0]:
value_iterator = ExpressionVariableRef(variable_name="__iterator",
source_ref=source_ref)
else:
value_iterator = ExpressionBuiltinIter1(value=buildNode(
provider=function_body, node=qual.iter, source_ref=source_ref),
source_ref=source_ref)
# First create the iterator and store it, next should be loop body
nested_statements = [
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_iter_variable.makeReference(
nested_temp_block),
source_ref=source_ref),
source=value_iterator,
source_ref=source_ref)
]
loop_statements = [
makeTryExceptSingleHandlerNode(
tried=makeStatementsSequenceFromStatement(
statement=StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_value_variable.makeReference(
nested_temp_block),
source_ref=source_ref),
source=ExpressionBuiltinNext1(
value=ExpressionTempVariableRef(
variable=tmp_iter_variable.makeReference(
nested_temp_block),
source_ref=source_ref),
source_ref=source_ref),
source_ref=source_ref)),
exception_name="StopIteration",
handler_body=makeStatementsSequenceFromStatement(
statement=StatementBreakLoop(
source_ref=source_ref.atInternal())),
source_ref=source_ref),
buildAssignmentStatements(
provider=provider if assign_provider else function_body,
node=qual.target,
source=ExpressionTempVariableRef(
variable=tmp_value_variable.makeReference(
nested_temp_block),
source_ref=source_ref),
source_ref=source_ref)
]
conditions = buildNodeList(provider=function_body,
nodes=qual.ifs,
source_ref=source_ref)
if len(conditions) == 1:
loop_statements.append(
StatementConditional(
condition=conditions[0],
yes_branch=makeStatementsSequenceFromStatement(
statement=current_body),
no_branch=None,
source_ref=source_ref))
elif len(conditions) > 1:
loop_statements.append(
StatementConditional(
condition=buildAndNode(provider=function_body,
values=conditions,
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=current_body),
no_branch=None,
source_ref=source_ref))
else:
loop_statements.append(current_body)
nested_statements.append(
StatementLoop(body=StatementsSequence(statements=loop_statements,
source_ref=source_ref),
source_ref=source_ref))
nested_temp_block.setBody(
StatementsSequence(statements=nested_statements,
source_ref=source_ref))
current_body = nested_temp_block
statements.append(current_body)
if start_value is not None:
statements.append(
StatementReturn(expression=ExpressionTempVariableRef(
variable=container_tmp.makeReference(temp_block),
source_ref=source_ref),
source_ref=source_ref))
temp_block.setBody(
StatementsSequence(statements=statements, source_ref=source_ref))
function_body.setBody(
StatementsFrame(statements=[temp_block],
guard_mode="pass_through"
if emit_class is not ExpressionYield else "generator",
arg_names=(),
kw_only_count=0,
code_name="contraction",
source_ref=source_ref))
return 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=(ExpressionBuiltinIter1(
value=buildNode(
provider=provider,
node=node.generators[0].iter,
source_ref=source_ref),
source_ref=source_ref), ),
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 _buildContractionNode(provider, node, name, emit_class, start_value, source_ref):
# The contraction nodes are reformulated to function bodies, with loops as
# described in the developer manual. They use a lot of temporary names,
# nested blocks, etc. and so a lot of variable names.
function_body = ExpressionOutlineFunction(
provider=provider, name=intern(name[1:-1]), source_ref=source_ref
)
iter_tmp = function_body.allocateTempVariable(temp_scope=None, name=".0")
container_tmp = function_body.allocateTempVariable(
temp_scope=None, name="contraction"
)
statements, release_statements = _buildContractionBodyNode(
provider=provider,
node=node,
emit_class=emit_class,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=start_value,
container_tmp=container_tmp,
function_body=function_body,
assign_provider=False,
for_asyncgen=False,
source_ref=source_ref,
)
assign_iter_statement = StatementAssignmentVariable(
source=_makeIteratorCreation(
provider=provider,
qual=node.generators[0],
for_asyncgen=False,
source_ref=source_ref,
),
variable=iter_tmp,
source_ref=source_ref,
)
statements.append(
StatementReturn(
expression=ExpressionTempVariableRef(
variable=container_tmp, source_ref=source_ref
),
source_ref=source_ref,
)
)
statements = (
makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal(),
),
)
if python_version < 300:
body = makeStatementsSequenceFromStatements(assign_iter_statement, statements)
else:
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name=name,
co_kind="Function",
co_varnames=(),
co_argcount=1,
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 = makeStatementsSequenceFromStatements(
assign_iter_statement,
StatementsFrameFunction(
statements=mergeStatements(statements, False),
code_object=code_object,
source_ref=source_ref,
),
)
function_body.setBody(body)
return function_body
def buildGeneratorExpressionNode(provider, node, source_ref):
# Generator expressions are dealt with by general code.
assert getKind(node) == "GeneratorExp"
function_body = ExpressionOutlineBody(
provider=provider, name="genexpr", source_ref=source_ref
)
iter_tmp = function_body.allocateTempVariable(temp_scope=None, name=".0")
parent_module = provider.getParentModule()
code_object = CodeObjectSpec(
co_name="<genexpr>",
co_kind="Generator",
co_varnames=(".0",),
co_argcount=1,
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(),
)
is_async = any(getattr(qual, "is_async", 0) for qual in node.generators)
# Some of the newly allowed stuff in 3.7 fails to set the async flag.
if not is_async and python_version >= 370:
is_async = detectFunctionBodyKind(nodes=node.generators)[0] in (
"Asyncgen",
"Coroutine",
)
if is_async:
code_body = ExpressionAsyncgenObjectBody(
provider=provider,
name="<genexpr>",
code_object=code_object,
flags=None,
auto_release=None,
source_ref=source_ref,
)
maker_class = ExpressionMakeAsyncgenObject
else:
code_body = ExpressionGeneratorObjectBody(
provider=provider,
name="<genexpr>",
code_object=code_object,
flags=None,
auto_release=None,
source_ref=source_ref.atColumnNumber(node.col_offset + 1),
)
maker_class = ExpressionMakeGeneratorObject
function_body.setBody(
makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable=iter_tmp,
source=_makeIteratorCreation(
provider=provider,
qual=node.generators[0],
for_asyncgen=is_async,
source_ref=source_ref,
),
source_ref=source_ref,
),
makeTryFinallyStatement(
provider=function_body,
tried=StatementReturn(
expression=maker_class(
ExpressionFunctionRef(
function_body=code_body, source_ref=source_ref
),
source_ref=source_ref,
),
source_ref=source_ref,
),
final=StatementReleaseVariable(
variable=iter_tmp, source_ref=source_ref
),
source_ref=source_ref,
),
)
)
statements, release_statements = _buildContractionBodyNode(
provider=provider,
node=node,
emit_class=ExpressionYield,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=None,
container_tmp=None,
function_body=code_body,
assign_provider=False,
for_asyncgen=is_async,
source_ref=source_ref,
)
if is_async:
statements.append(StatementGeneratorReturnNone(source_ref=source_ref))
statements = (
makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal(),
),
)
code_body.setBody(
makeStatementsSequenceFromStatement(
statement=StatementsFrameGenerator(
statements=mergeStatements(statements, False),
code_object=code_object,
source_ref=source_ref,
)
)
)
return function_body
def getDictUnpackingHelper():
helper_name = "_unpack_dict"
result = ExpressionFunctionBody(provider=getInternalModule(),
name=helper_name,
doc=None,
parameters=ParameterSpec(
name=helper_name,
normal_args=(),
list_star_arg="args",
dict_star_arg=None,
default_count=0,
kw_only_args=()),
source_ref=internal_source_ref,
is_class=False)
temp_scope = None
tmp_result_variable = result.allocateTempVariable(temp_scope, "dict")
tmp_iter_variable = result.allocateTempVariable(temp_scope, "iter")
tmp_item_variable = result.allocateTempVariable(temp_scope, "keys")
loop_body = makeStatementsSequenceFromStatements(
makeTryExceptSingleHandlerNode(
tried=StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
source=ExpressionBuiltinNext1(value=ExpressionTempVariableRef(
variable=tmp_iter_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref),
source_ref=internal_source_ref),
exception_name="StopIteration",
handler_body=StatementBreakLoop(source_ref=internal_source_ref),
source_ref=internal_source_ref),
makeTryExceptSingleHandlerNode(
tried=StatementExpressionOnly(
expression=ExpressionDictOperationUpdate(
dict_arg=ExpressionTempVariableRef(
variable=tmp_result_variable,
source_ref=internal_source_ref),
value=ExpressionTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref),
source_ref=internal_source_ref),
exception_name="AttributeError",
handler_body=StatementRaiseException(
exception_type=ExpressionBuiltinMakeException(
exception_name="TypeError",
args=(ExpressionOperationBinary(
operator="Mod",
left=ExpressionConstantRef(
constant="""\
'%s' object is not a mapping""",
source_ref=internal_source_ref,
user_provided=True),
right=ExpressionMakeTuple(
elements=(ExpressionAttributeLookup(
source=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=tmp_item_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref),
attribute_name="__name__",
source_ref=internal_source_ref), ),
source_ref=internal_source_ref),
source_ref=internal_source_ref), ),
source_ref=internal_source_ref),
exception_value=None,
exception_trace=None,
exception_cause=None,
source_ref=internal_source_ref),
source_ref=internal_source_ref))
args_variable = result.getVariableForAssignment(variable_name="args")
final = (
StatementReleaseVariable(variable=tmp_result_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_iter_variable,
source_ref=internal_source_ref),
StatementReleaseVariable(variable=tmp_item_variable,
source_ref=internal_source_ref),
)
tried = makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_iter_variable, source_ref=internal_source_ref),
source=ExpressionBuiltinIter1(value=ExpressionVariableRef(
variable_name="args",
variable=args_variable,
source_ref=internal_source_ref),
source_ref=internal_source_ref),
source_ref=internal_source_ref),
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_result_variable, source_ref=internal_source_ref),
source=ExpressionConstantRef(constant={},
source_ref=internal_source_ref),
source_ref=internal_source_ref),
StatementLoop(body=loop_body, source_ref=internal_source_ref),
StatementReturn(expression=ExpressionTempVariableRef(
variable=tmp_result_variable, source_ref=internal_source_ref),
source_ref=internal_source_ref))
result.setBody(
makeStatementsSequenceFromStatement(
makeTryFinallyStatement(provider=result,
tried=tried,
final=final,
source_ref=internal_source_ref)))
return result
def buildComplexComparisonNode(provider, left, rights, comparators,
source_ref):
# This is a bit complex, due to the many details, pylint: disable=too-many-locals
outline_body = ExpressionOutlineBody(provider=provider,
name="comparison_chain",
source_ref=source_ref)
variables = [
outline_body.allocateTempVariable(temp_scope=None,
name="operand_%d" % count)
for count in range(2,
len(rights) + 2)
]
tmp_variable = outline_body.allocateTempVariable(temp_scope=None,
name="comparison_result")
def makeTempAssignment(count, value):
return StatementAssignmentVariable(variable=variables[count],
source=value,
source_ref=source_ref)
def makeReleaseStatement(count):
return StatementReleaseVariable(variable=variables[count],
source_ref=source_ref)
def makeValueComparisonReturn(left, right, comparator):
yield StatementAssignmentVariable(
variable=tmp_variable,
source=_makeComparisonNode(left=left,
right=right,
comparator=comparator,
source_ref=source_ref),
source_ref=source_ref,
)
yield makeStatementConditional(
condition=ExpressionOperationNot(
operand=ExpressionTempVariableRef(variable=tmp_variable,
source_ref=source_ref),
source_ref=source_ref,
),
yes_branch=StatementReturn(
expression=ExpressionTempVariableRef(variable=tmp_variable,
source_ref=source_ref),
source_ref=source_ref,
),
no_branch=None,
source_ref=source_ref,
)
statements = []
final = []
for count, value in enumerate(rights):
if value is not rights[-1]:
statements.append(makeTempAssignment(count, value))
final.append(makeReleaseStatement(count))
right = ExpressionTempVariableRef(variable=variables[count],
source_ref=source_ref)
else:
right = value
if count != 0:
left = ExpressionTempVariableRef(variable=variables[count - 1],
source_ref=source_ref)
comparator = comparators[count]
if value is not rights[-1]:
statements.extend(
makeValueComparisonReturn(left, right, comparator))
else:
statements.append(
StatementReturn(
expression=_makeComparisonNode(
left=left,
right=right,
comparator=comparator,
source_ref=source_ref,
),
source_ref=source_ref,
))
final.append(
StatementReleaseVariable(variable=tmp_variable,
source_ref=source_ref))
outline_body.setChild(
"body",
makeStatementsSequenceFromStatement(statement=makeTryFinallyStatement(
provider=outline_body,
tried=statements,
final=final,
source_ref=source_ref,
)),
)
return outline_body
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.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=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(
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
)