def _buildPython2ListContraction(provider, node, 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.
# Note: The assign_provider is only to cover Python2 list contractions,
# assigning one of the loop variables to the outside scope.
function_body = ExpressionOutlineBody(
provider=provider, name="list_contraction", source_ref=source_ref
)
iter_tmp = function_body.allocateTempVariable(temp_scope=None, name=".0")
container_tmp = function_body.allocateTempVariable(
temp_scope=None, name="contraction_result"
)
statements, release_statements = _buildContractionBodyNode(
provider=provider,
node=node,
emit_class=StatementListOperationAppend,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=[],
container_tmp=container_tmp,
function_body=function_body,
assign_provider=True,
for_asyncgen=False,
source_ref=source_ref,
)
statements.append(
StatementReturn(
expression=ExpressionTempVariableRef(
variable=container_tmp, source_ref=source_ref
),
source_ref=source_ref,
)
)
statement = makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal(),
)
function_body.setChild(
"body", makeStatementsSequenceFromStatement(statement=statement)
)
return function_body
def _buildPython2ListContraction(provider, node, 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.
# Note: The assign_provider is only to cover Python2 list contractions,
# assigning one of the loop variables to the outside scope.
function_body = ExpressionOutlineBody(
provider=provider, name="list_contraction", source_ref=source_ref
)
iter_tmp = function_body.allocateTempVariable(temp_scope=None, name=".0")
container_tmp = function_body.allocateTempVariable(
temp_scope=None, name="contraction_result"
)
statements, release_statements = _buildContractionBodyNode(
provider=provider,
node=node,
emit_class=StatementListOperationAppend,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=[],
container_tmp=container_tmp,
function_body=function_body,
assign_provider=True,
for_asyncgen=False,
source_ref=source_ref,
)
statements.append(
StatementReturn(
expression=ExpressionTempVariableRef(
variable=container_tmp, source_ref=source_ref
),
source_ref=source_ref,
)
)
statement = makeTryFinallyStatement(
provider=function_body,
tried=statements,
final=release_statements,
source_ref=source_ref.atInternal(),
)
function_body.setBody(makeStatementsSequenceFromStatement(statement=statement))
return function_body
def buildNamedExprNode(provider, node, source_ref):
""" Assignment expressions, Python3.8 or higher only.
"""
outline_body = ExpressionOutlineBody(
provider=provider, name="assignment_expr", source_ref=source_ref
)
tmp_value = outline_body.allocateTempVariable(temp_scope=None, name="value")
value = buildNode(provider=provider, node=node.value, source_ref=source_ref)
locals_owner = provider
while locals_owner.isExpressionOutlineFunction():
locals_owner = locals_owner.getParentVariableProvider()
variable_name = node.target.id
if (
locals_owner.isExpressionGeneratorObjectBody()
and locals_owner.name == "<genexpr>"
):
locals_owner.addNonlocalsDeclaration(
(variable_name,), user_provided=False, source_ref=source_ref
)
statements = (
StatementAssignmentVariable(
variable=tmp_value, source=value, source_ref=source_ref
),
StatementAssignmentVariableName(
provider=locals_owner,
variable_name=variable_name,
source=ExpressionTempVariableRef(variable=tmp_value, source_ref=source_ref),
source_ref=source_ref,
),
StatementReturn(
expression=ExpressionTempVariableRef(
variable=tmp_value, source_ref=source_ref
),
source_ref=source_ref,
),
)
outline_body.setBody(
makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=provider,
tried=statements,
final=StatementReleaseVariable(
variable=tmp_value, source_ref=source_ref
),
source_ref=source_ref,
)
)
)
return outline_body
def convertFunctionCallToOutline(provider, function_ref, values):
# This has got to have pretty man details, pylint: disable=R0914
function_body = function_ref.getFunctionBody()
# TODO: Use the call location
source_ref = function_body.getSourceReference()
outline_body = ExpressionOutlineBody(provider=provider,
name="inline",
body=None,
source_ref=source_ref)
clone = function_body.getBody().makeClone()
temp_scope = outline_body.getOutlineTempScope()
translation = {}
for variable in function_body.getLocalVariables():
# TODO: Later we should be able to do that too.
assert not variable.isSharedTechnically()
new_variable = outline_body.allocateTempVariable(
temp_scope=temp_scope, name=variable.getName())
# TODO: Lets update all at once maybe, it would take less visits.
updateVariableUsage(clone,
old_variable=variable,
new_variable=new_variable)
translation[variable.getName()] = new_variable
statements = []
argument_names = function_body.getParameters().getAllNames()
assert len(argument_names) == len(values), (argument_names, values)
for argument_name, value in zip(argument_names, values):
statements.append(
StatementAssignmentVariable(
variable_ref=makeVariableTargetRefNode(
variable=translation[argument_name],
source_ref=source_ref),
source=value,
source_ref=source_ref,
))
body = makeStatementsSequence(statements=(statements, clone),
allow_none=False,
source_ref=source_ref)
outline_body.setBody(body)
return outline_body
def convertFunctionCallToOutline(provider, function_ref, values):
# This has got to have pretty man details, pylint: disable=too-many-locals
function_body = function_ref.getFunctionBody()
call_source_ref = function_ref.getSourceReference()
function_source_ref = function_body.getSourceReference()
outline_body = ExpressionOutlineBody(
provider=provider, name="inline", source_ref=function_source_ref
)
clone = function_body.getBody().makeClone()
temp_scope = outline_body.getOutlineTempScope()
translation = {}
for variable in function_body.getLocalVariables():
# TODO: Later we should be able to do that too.
assert variable.isSharedTechnically() is False
new_variable = outline_body.allocateTempVariable(
temp_scope=temp_scope, name=variable.getName()
)
# TODO: Lets update all at once maybe, it would take less visits.
updateVariableUsage(clone, old_variable=variable, new_variable=new_variable)
translation[variable.getName()] = new_variable
statements = []
if function_body.isExpressionClassBody():
argument_names = ()
else:
argument_names = function_body.getParameters().getParameterNames()
assert len(argument_names) == len(values), (argument_names, values)
for argument_name, value in zip(argument_names, values):
statements.append(
StatementAssignmentVariable(
variable=translation[argument_name],
source=value,
source_ref=call_source_ref,
)
)
body = makeStatementsSequence(
statements=(statements, clone), allow_none=False, source_ref=function_source_ref
)
outline_body.setBody(body)
return outline_body
def wrapEvalBuiltin(source, globals_arg, locals_arg, source_ref):
provider = node.getParentVariableProvider()
outline_body = ExpressionOutlineBody(
provider=node.getParentVariableProvider(),
name="eval_call",
source_ref=source_ref,
)
globals_ref, locals_ref, tried, final = wrapEvalGlobalsAndLocals(
provider=provider,
globals_node=globals_arg,
locals_node=locals_arg,
temp_scope=outline_body.getOutlineTempScope(),
source_ref=source_ref,
)
# The wrapping should not relocate to the "source_ref".
assert (globals_arg is None or globals_ref.getSourceReference()
== globals_arg.getSourceReference())
assert (locals_arg is None or locals_ref.getSourceReference()
== locals_arg.getSourceReference())
source_variable = outline_body.allocateTempVariable(temp_scope=None,
name="source")
final.setStatements(final.getStatements() + (StatementDelVariable(
variable=source_variable, tolerant=True, source_ref=source_ref), ))
strip_choice = makeConstantRefNode(constant=(" \t", ),
source_ref=source_ref)
if python_version >= 300:
strip_choice = ExpressionConditional(
condition=ExpressionComparisonIs(
left=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(
variable=source_variable, source_ref=source_ref),
source_ref=source_ref,
),
right=makeExpressionBuiltinRef(builtin_name="bytes",
source_ref=source_ref),
source_ref=source_ref,
),
expression_yes=makeConstantRefNode(constant=(b" \t", ),
source_ref=source_ref),
expression_no=strip_choice,
source_ref=source_ref,
)
# Source needs some special treatment for eval, if it's a string, it
# must be stripped.
string_fixup = StatementAssignmentVariable(
variable=source_variable,
source=makeExpressionCall(
called=ExpressionAttributeLookup(
source=ExpressionTempVariableRef(variable=source_variable,
source_ref=source_ref),
attribute_name="strip",
source_ref=source_ref,
),
args=strip_choice, # This is a tuple
kw=None,
source_ref=source_ref,
),
source_ref=source_ref,
)
acceptable_builtin_types = [
ExpressionBuiltinAnonymousRef(builtin_name="code",
source_ref=source_ref)
]
if python_version >= 270:
acceptable_builtin_types.append(
makeExpressionBuiltinRef(builtin_name="memoryview",
source_ref=source_ref))
statements = (
StatementAssignmentVariable(variable=source_variable,
source=source,
source_ref=source_ref),
makeStatementConditional(
condition=ExpressionOperationNOT(
operand=ExpressionBuiltinIsinstance(
instance=ExpressionTempVariableRef(
variable=source_variable, source_ref=source_ref),
classes=makeSequenceCreationOrConstant(
sequence_kind="tuple",
elements=acceptable_builtin_types,
source_ref=source_ref,
),
source_ref=source_ref,
),
source_ref=source_ref,
),
yes_branch=string_fixup,
no_branch=None,
source_ref=source_ref,
),
StatementReturn(
expression=ExpressionBuiltinEval(
source_code=ExpressionTempVariableRef(
variable=source_variable, source_ref=source_ref),
globals_arg=globals_ref,
locals_arg=locals_ref,
source_ref=source_ref,
),
source_ref=source_ref,
),
)
tried = makeStatementsSequence(statements=(tried, ) + statements,
allow_none=False,
source_ref=source_ref)
outline_body.setBody(
makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=outline_body,
tried=tried,
final=final,
source_ref=source_ref,
)))
return outline_body
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 StatementConditional(
condition=ExpressionOperationNOT(operand=ExpressionTempVariableRef(
variable=tmp_variable, source_ref=source_ref),
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=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.setBody(
makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(provider=outline_body,
tried=statements,
final=final,
source_ref=source_ref)))
return outline_body
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(
ExpressionConstantRef(
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 _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.
# Note: The assign_provider is only to cover Python2 list contractions,
# assigning one of the loop variables to the outside scope.
if assign_provider:
function_body = ExpressionOutlineBody(
provider = provider,
name = name,
body = None, # later
source_ref = source_ref
)
iter_tmp = function_body.allocateTempVariable(
temp_scope = None,
name = ".0"
)
else:
function_body = ExpressionFunctionBody(
provider = provider,
name = name,
doc = None,
parameters = ParameterSpec(
name = "contraction",
normal_args = (".0",),
list_star_arg = None,
dict_star_arg = None,
default_count = 0,
kw_only_args = ()
),
is_class = False,
source_ref = source_ref
)
iter_tmp = function_body.getVariableForAssignment(
variable_name = ".0"
)
assert iter_tmp.isParameterVariable()
if start_value is not None:
container_tmp = function_body.allocateTempVariable(
temp_scope = None,
name = "contraction_result"
)
else:
container_tmp = None
statements, release_statements = _buildContractionBodyNode(
function_body = function_body,
assign_provider = assign_provider,
provider = provider,
node = node,
emit_class = emit_class,
iter_tmp = iter_tmp,
temp_scope = None,
start_value = start_value,
container_tmp = container_tmp,
source_ref = source_ref,
)
if start_value is not None:
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 = StatementsFrame(
statements = mergeStatements(statements, False),
guard_mode = "pass_through"
if emit_class is not ExpressionYield else
"generator",
var_names = (),
arg_count = 0,
kw_only_count = 0,
has_starlist = False,
has_stardict = False,
code_name = "contraction",
source_ref = source_ref
)
)
)
if not assign_provider:
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
)
else:
return function_body
def convertFunctionCallToOutline(provider, function_ref, values):
# This has got to have pretty man details, pylint: disable=too-many-locals
function_body = function_ref.getFunctionBody()
call_source_ref = function_ref.getSourceReference()
function_source_ref = function_body.getSourceReference()
outline_body = ExpressionOutlineBody(provider=provider,
name="inline",
source_ref=function_source_ref)
clone = function_body.getBody().makeClone()
temp_scope = outline_body.getOutlineTempScope()
translation = {}
for variable in function_body.getLocalVariables():
# TODO: Later we should be able to do that too.
assert variable.isSharedTechnically() is False
new_variable = outline_body.allocateTempVariable(
temp_scope=temp_scope, name=variable.getName())
# TODO: Lets update all at once maybe, it would take less visits.
updateVariableUsage(clone,
old_variable=variable,
new_variable=new_variable)
translation[variable.getName()] = new_variable
statements = []
if function_body.isExpressionClassBody():
argument_names = ()
else:
argument_names = function_body.getParameters().getParameterNames()
assert len(argument_names) == len(values), (argument_names, values)
for argument_name, value in zip(argument_names, values):
statements.append(
StatementAssignmentVariable(
variable=translation[argument_name],
source=value,
source_ref=call_source_ref,
))
body = makeStatementsSequence(statements=(statements, clone),
allow_none=False,
source_ref=function_source_ref)
auto_releases = function_body.getFunctionVariablesWithAutoReleases()
if auto_releases:
releases = [
StatementReleaseVariable(variable=variable,
source_ref=function_source_ref)
for variable in auto_releases
]
body = makeTryFinallyStatement(
provider=outline_body,
tried=body,
final=releases,
source_ref=function_source_ref,
)
outline_body.setBody(body)
return outline_body
def wrapEvalBuiltin(source, globals_arg, locals_arg, source_ref):
provider = node.getParentVariableProvider()
outline_body = ExpressionOutlineBody(
provider=node.getParentVariableProvider(), name="eval_call", body=None, source_ref=source_ref # later
)
globals_ref, locals_ref, tried, final = wrapEvalGlobalsAndLocals(
provider=provider,
globals_node=globals_arg,
locals_node=locals_arg,
temp_scope=outline_body.getOutlineTempScope(),
source_ref=source_ref,
)
# The wrapping should not relocate to the "source_ref".
assert globals_arg is None or globals_ref.getSourceReference() == globals_arg.getSourceReference()
assert locals_arg is None or locals_ref.getSourceReference() == locals_arg.getSourceReference()
source_variable = outline_body.allocateTempVariable(temp_scope=None, name="source")
final.setStatements(
final.getStatements()
+ (
StatementDelVariable(
variable_ref=ExpressionTargetTempVariableRef(variable=source_variable, source_ref=source_ref),
tolerant=True,
source_ref=source_ref,
),
)
)
strip_choice = ExpressionConstantRef(constant=(" \t",), source_ref=source_ref)
if python_version >= 300:
strip_choice = ExpressionConditional(
condition=ExpressionComparisonIs(
left=ExpressionBuiltinType1(
value=ExpressionTempVariableRef(variable=source_variable, source_ref=source_ref),
source_ref=source_ref,
),
right=ExpressionBuiltinRef(builtin_name="bytes", source_ref=source_ref),
source_ref=source_ref,
),
expression_yes=ExpressionConstantRef(constant=(b" \t",), source_ref=source_ref),
expression_no=strip_choice,
source_ref=source_ref,
)
# Source needs some special treatment for eval, if it's a string, it
# must be stripped.
string_fixup = [
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(variable=source_variable, source_ref=source_ref),
source=ExpressionCallNoKeywords(
called=ExpressionAttributeLookup(
source=ExpressionTempVariableRef(variable=source_variable, source_ref=source_ref),
attribute_name="strip",
source_ref=source_ref,
),
args=strip_choice,
source_ref=source_ref,
),
source_ref=source_ref,
)
]
statements = (
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(variable=source_variable, source_ref=source_ref),
source=source,
source_ref=source_ref,
),
StatementConditional(
condition=ExpressionOperationNOT(
operand=ExpressionBuiltinIsinstance(
instance=ExpressionTempVariableRef(variable=source_variable, source_ref=source_ref),
classes=ExpressionBuiltinAnonymousRef(builtin_name="code", source_ref=source_ref),
source_ref=source_ref,
),
source_ref=source_ref,
),
yes_branch=StatementsSequence(statements=string_fixup, source_ref=source_ref),
no_branch=None,
source_ref=source_ref,
),
StatementReturn(
expression=ExpressionBuiltinEval(
source_code=ExpressionTempVariableRef(variable=source_variable, source_ref=source_ref),
globals_arg=globals_ref,
locals_arg=locals_ref,
source_ref=source_ref,
),
source_ref=source_ref,
),
)
tried = makeStatementsSequence(statements=(tried,) + statements, allow_none=False, source_ref=source_ref)
outline_body.setBody(
makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=outline_body, tried=tried, final=final, source_ref=source_ref
)
)
)
return outline_body
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.setBody(
makeStatementsSequenceFromStatement(
statement=makeTryFinallyStatement(
provider=outline_body,
tried=statements,
final=final,
source_ref=source_ref,
)
)
)
return outline_body
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.
# Note: The assign_provider is only to cover Python2 list contractions,
# assigning one of the loop variables to the outside scope.
if assign_provider:
function_body = ExpressionOutlineBody(
provider=provider,
name=name,
body=None, # later
source_ref=source_ref)
iter_tmp = function_body.allocateTempVariable(temp_scope=None,
name=".0")
else:
function_body = ExpressionFunctionBody(provider=provider,
name=name,
doc=None,
parameters=ParameterSpec(
name="contraction",
normal_args=(".0", ),
list_star_arg=None,
dict_star_arg=None,
default_count=0,
kw_only_args=()),
is_class=False,
source_ref=source_ref)
iter_tmp = function_body.getVariableForAssignment(variable_name=".0")
assert iter_tmp.isParameterVariable()
if start_value is not None:
container_tmp = function_body.allocateTempVariable(
temp_scope=None, name="contraction_result")
else:
container_tmp = None
statements, release_statements = _buildContractionBodyNode(
function_body=function_body,
assign_provider=assign_provider,
provider=provider,
node=node,
emit_class=emit_class,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=start_value,
container_tmp=container_tmp,
source_ref=source_ref,
)
if start_value is not None:
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=StatementsFrame(
statements=mergeStatements(statements, False),
guard_mode="pass_through"
if emit_class is not ExpressionYield else "generator",
var_names=(),
arg_count=0,
kw_only_count=0,
has_starlist=False,
has_stardict=False,
code_name="contraction",
source_ref=source_ref)))
if not assign_provider:
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)
else:
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_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(),
)
if python_version < 370:
is_async = any(getattr(qual, "is_async", 0) for qual in node.generators)
else:
is_async = detectFunctionBodyKind(nodes=[node])[0] in ("Asyncgen", "Coroutine")
if is_async:
code_body = ExpressionAsyncgenObjectBody(
provider=provider,
name="<genexpr>",
code_object=code_object,
flags=set(),
source_ref=source_ref,
)
maker_class = ExpressionMakeAsyncgenObject
else:
code_body = ExpressionGeneratorObjectBody(
provider=provider,
name="<genexpr>",
code_object=code_object,
flags=set(),
source_ref=source_ref,
)
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 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,
),
defaults=(),
kw_defaults=None,
annotations=None,
source_ref=source_ref,
),
values=helper_args,
source_ref=source_ref,
)
outline_body.setBody(
makeStatementsSequenceFromStatements(
StatementAssignmentVariable(variable=tmp_called,
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_freevars=(),
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 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
)
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 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