def makeTryExceptNoRaise(provider, temp_scope, tried, handling, no_raise,
source_ref):
# This helper executes the core re-formulation of "no_raise" blocks, which
# are the "else" blocks of "try"/"except" statements. In order to limit the
# execution, we use an indicator variable instead, which will signal that
# the tried block executed up to the end. And then we make the else block be
# a conditional statement checking that.
if tried is None:
return no_raise
tmp_handler_indicator_variable = provider.allocateTempVariable(
temp_scope=temp_scope, name="unhandled_indicator")
statements = mergeStatements((StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_handler_indicator_variable,
source_ref=source_ref.atInternal()),
source=ExpressionConstantRef(constant=False, source_ref=source_ref),
source_ref=no_raise.getSourceReference().atInternal()), handling),
allow_none=True)
handling = StatementsSequence(statements=statements, source_ref=source_ref)
tried = (StatementTry(tried=tried,
except_handler=handling,
break_handler=None,
continue_handler=None,
return_handler=None,
source_ref=source_ref),
StatementConditional(condition=ExpressionComparisonIs(
left=ExpressionTempVariableRef(
variable=tmp_handler_indicator_variable,
source_ref=source_ref),
right=ExpressionConstantRef(constant=True,
source_ref=source_ref),
source_ref=source_ref),
yes_branch=no_raise,
no_branch=None,
source_ref=source_ref))
final = StatementReleaseVariable(variable=tmp_handler_indicator_variable,
source_ref=source_ref.atInternal())
return makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_handler_indicator_variable,
source_ref=source_ref.atInternal()),
source=ExpressionConstantRef(constant=True, source_ref=source_ref),
source_ref=source_ref.atInternal()),
makeTryFinallyStatement(provider=provider,
tried=tried,
final=final,
source_ref=source_ref))
def makeValueComparisonReturn(left, right, comparator):
yield StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_variable, source_ref=source_ref),
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)
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(
function_body=function_body,
assign_provider=True,
provider=provider,
node=node,
emit_class=StatementListOperationAppend,
iter_tmp=iter_tmp,
temp_scope=None,
start_value=makeConstantRefNode(constant=[], source_ref=source_ref),
container_tmp=container_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()), )
function_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementsFrame(
statements=mergeStatements(statements, False),
guard_mode="pass_through",
code_object=None,
source_ref=source_ref)))
return function_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_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 _buildForLoopNode(provider, node, sync, source_ref):
# The for loop is re-formulated according to developer manual. An iterator
# is created, and looped until it gives StopIteration. The else block is
# taken if a for loop exits normally, i.e. because of iterator
# exhaustion. We do this by introducing an indicator variable.
# We handle async and sync both here, leading to cases, pylint: disable=too-many-locals
source = buildNode(provider, node.iter, source_ref)
# Temporary variables, we need one for the iterator, and one for the current
# value.
temp_scope = provider.allocateTempScope("for_loop")
tmp_iter_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "for_iterator"
)
tmp_value_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "iter_value"
)
else_block = buildStatementsNode(
provider = provider,
nodes = node.orelse if node.orelse else None,
source_ref = source_ref
)
if else_block is not None:
tmp_break_indicator = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "break_indicator"
)
statements = [
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_break_indicator,
source_ref = source_ref
),
source = makeConstantRefNode(
constant = True,
source_ref = source_ref
),
source_ref = source_ref
)
]
else:
statements = []
statements.append(
StatementLoopBreak(
source_ref = source_ref
)
)
handler_body = makeStatementsSequence(
statements = statements,
allow_none = False,
source_ref = source_ref
)
if sync:
next_node = ExpressionBuiltinNext1(
value = ExpressionTempVariableRef(
variable = tmp_iter_variable,
source_ref = source_ref
),
source_ref = source_ref
)
else:
next_node = ExpressionAsyncNext(
value = ExpressionTempVariableRef(
variable = tmp_iter_variable,
source_ref = source_ref
),
source_ref = source_ref
)
statements = (
makeTryExceptSingleHandlerNode(
tried = StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_value_variable,
source_ref = source_ref
),
source = next_node,
source_ref = source_ref
),
exception_name = "StopIteration" if sync else "StopAsyncIteration",
handler_body = handler_body,
source_ref = source_ref
),
buildAssignmentStatements(
provider = provider,
node = node.target,
source = ExpressionTempVariableRef(
variable = tmp_value_variable,
source_ref = source_ref
),
source_ref = source_ref
)
)
pushBuildContext("loop_body")
statements += (
buildStatementsNode(
provider = provider,
nodes = node.body,
source_ref = source_ref
),
)
popBuildContext()
loop_body = makeStatementsSequence(
statements = statements,
allow_none = True,
source_ref = source_ref
)
cleanup_statements = [
StatementReleaseVariable(
variable = tmp_value_variable,
source_ref = source_ref
),
StatementReleaseVariable(
variable = tmp_iter_variable,
source_ref = source_ref
)
]
if else_block is not None:
statements = [
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_break_indicator,
source_ref = source_ref
),
source = makeConstantRefNode(
constant = False,
source_ref = source_ref
),
source_ref = source_ref
)
]
else:
statements = []
if sync:
iter_source = ExpressionBuiltinIter1(
value = source,
source_ref = source.getSourceReference()
)
else:
iter_source = ExpressionAsyncIter(
value = source,
source_ref = source.getSourceReference()
)
statements += [
# First create the iterator and store it.
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = tmp_iter_variable,
source_ref = source_ref
),
source = iter_source,
source_ref = source_ref
),
makeTryFinallyStatement(
provider = provider,
tried = StatementLoop(
body = loop_body,
source_ref = source_ref
),
final = StatementsSequence(
statements = cleanup_statements,
source_ref = source_ref
),
source_ref = source_ref
)
]
if else_block is not None:
statements += [
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = tmp_break_indicator,
source_ref = source_ref
),
right = makeConstantRefNode(
constant = True,
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = else_block,
no_branch = None,
source_ref = source_ref
)
]
statements = (
makeTryFinallyStatement(
provider = provider,
tried = statements,
final = StatementReleaseVariable(
variable = tmp_break_indicator,
source_ref = source_ref
),
source_ref = source_ref
),
)
return makeStatementsSequenceFromStatements(
*statements
)
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 _buildWithNode(provider, context_expr, assign_target, body, body_lineno,
source_ref):
# Many details, pylint: disable=R0914
with_source = buildNode(provider, context_expr, source_ref)
if Options.isFullCompat():
source_ref = with_source.getCompatibleSourceReference()
temp_scope = provider.allocateTempScope("with")
tmp_source_variable = provider.allocateTempVariable(temp_scope=temp_scope,
name="source")
tmp_exit_variable = provider.allocateTempVariable(temp_scope=temp_scope,
name="exit")
tmp_enter_variable = provider.allocateTempVariable(temp_scope=temp_scope,
name="enter")
tmp_indicator_variable = provider.allocateTempVariable(
temp_scope=temp_scope, name="indicator")
statements = (buildAssignmentStatements(provider=provider,
node=assign_target,
allow_none=True,
source=ExpressionTempVariableRef(
variable=tmp_enter_variable,
source_ref=source_ref),
source_ref=source_ref), body)
with_body = makeStatementsSequence(statements=statements,
allow_none=True,
source_ref=source_ref)
if Options.isFullCompat():
if body:
deepest = body
while deepest.getVisitableNodes():
deepest = deepest.getVisitableNodes()[-1]
body_lineno = deepest.getCompatibleSourceReference().getLineNumber(
)
with_exit_source_ref = source_ref.atLineNumber(body_lineno)
else:
with_exit_source_ref = source_ref
# The "__enter__" and "__exit__" were normal attribute lookups under
# CPython2.6, but that changed with CPython2.7.
if Utils.python_version < 270:
attribute_lookup_class = ExpressionAttributeLookup
else:
attribute_lookup_class = ExpressionAttributeLookupSpecial
statements = [
# First assign the with context to a temporary variable.
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_source_variable, source_ref=source_ref),
source=with_source,
source_ref=source_ref),
# Next, assign "__enter__" and "__exit__" attributes to temporary
# variables.
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_exit_variable, source_ref=source_ref),
source=attribute_lookup_class(source=ExpressionTempVariableRef(
variable=tmp_source_variable, source_ref=source_ref),
attribute_name="__exit__",
source_ref=source_ref),
source_ref=source_ref),
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_enter_variable, source_ref=source_ref),
source=ExpressionCallEmpty(called=attribute_lookup_class(
source=ExpressionTempVariableRef(variable=tmp_source_variable,
source_ref=source_ref),
attribute_name="__enter__",
source_ref=source_ref),
source_ref=source_ref),
source_ref=source_ref),
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_indicator_variable, source_ref=source_ref),
source=ExpressionConstantRef(constant=True, source_ref=source_ref),
source_ref=source_ref),
]
statements += [
makeTryFinallyStatement(
provider=provider,
tried=makeTryExceptSingleHandlerNodeWithPublish(
provider=provider,
tried=with_body,
exception_name="BaseException",
handler_body=StatementsSequence(
statements=(
# Prevents final block from calling __exit__ as
# well.
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_indicator_variable,
source_ref=source_ref),
source=ExpressionConstantRef(
constant=False, source_ref=source_ref),
source_ref=source_ref),
makeConditionalStatement(
condition=ExpressionCallNoKeywords(
called=ExpressionTempVariableRef(
variable=tmp_exit_variable,
source_ref=with_exit_source_ref),
args=ExpressionMakeTuple(
elements=(
ExpressionCaughtExceptionTypeRef(
source_ref=with_exit_source_ref),
ExpressionCaughtExceptionValueRef(
source_ref=with_exit_source_ref),
ExpressionCaughtExceptionTracebackRef(
source_ref=source_ref),
),
source_ref=source_ref),
source_ref=with_exit_source_ref),
no_branch=makeReraiseExceptionStatement(
source_ref=with_exit_source_ref),
yes_branch=None,
source_ref=with_exit_source_ref),
),
source_ref=source_ref),
public_exc=Utils.python_version >= 270,
source_ref=source_ref),
final=StatementConditional(
condition=ExpressionComparisonIs(
left=ExpressionTempVariableRef(
variable=tmp_indicator_variable,
source_ref=source_ref),
right=ExpressionConstantRef(constant=True,
source_ref=source_ref),
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=StatementExpressionOnly(
expression=ExpressionCallNoKeywords(
called=ExpressionTempVariableRef(
variable=tmp_exit_variable,
source_ref=source_ref),
args=ExpressionConstantRef(constant=(None, None,
None),
source_ref=source_ref),
source_ref=with_exit_source_ref),
source_ref=source_ref)),
no_branch=None,
source_ref=source_ref),
source_ref=source_ref)
]
return makeTryFinallyStatement(
provider=provider,
tried=statements,
final=(
StatementReleaseVariable(variable=tmp_source_variable,
source_ref=with_exit_source_ref),
StatementReleaseVariable(variable=tmp_enter_variable,
source_ref=with_exit_source_ref),
StatementReleaseVariable(variable=tmp_exit_variable,
source_ref=with_exit_source_ref),
StatementReleaseVariable(variable=tmp_indicator_variable,
source_ref=with_exit_source_ref),
),
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.
# TODO: No function ought to be necessary.
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()
code_object = CodeObjectSpec(
co_name=name,
co_kind="Generator" if emit_class is ExpressionYield else "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,
)
if emit_class is ExpressionYield:
code_body = ExpressionGeneratorObjectBody(provider=function_body,
name="<genexpr>",
flags=set(),
source_ref=source_ref)
iter_tmp = code_body.getVariableForReference(variable_name=".0")
assert iter_tmp.isLocalVariable()
function_body.setBody(
makeStatementsSequenceFromStatement(statement=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)))
else:
code_body = function_body
if start_value is not None:
container_tmp = code_body.allocateTempVariable(
temp_scope=None, name="contraction_result")
else:
container_tmp = None
statements, release_statements = _buildContractionBodyNode(
function_body=code_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,
)
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()), )
if emit_class is ExpressionYield:
guard_mode = "generator"
else:
guard_mode = "full"
code_body.setBody(
makeStatementsSequenceFromStatement(statement=StatementsFrame(
statements=mergeStatements(statements, False),
guard_mode=guard_mode,
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 buildComplexComparisonNode(provider, left, rights, comparators,
source_ref):
# This is a bit complex, due to the many details, pylint: disable=R0914
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_ref=ExpressionTargetTempVariableRef(
variable=variables[count], source_ref=source_ref),
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_ref=ExpressionTargetTempVariableRef(
variable=tmp_variable, source_ref=source_ref),
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 buildWhileLoopNode(provider, node, source_ref):
# The while loop is re-formulated according to developer manual. The
# condition becomes an early condition to break the loop. The else block is
# taken if a while loop exits normally, i.e. because of condition not being
# true. We do this by introducing an indicator variable.
else_block = buildStatementsNode(
provider=provider,
nodes=node.orelse if node.orelse else None,
source_ref=source_ref)
if else_block is not None:
temp_scope = provider.allocateTempScope("while_loop")
tmp_break_indicator = provider.allocateTempVariable(
temp_scope=temp_scope, name="break_indicator")
statements = (StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_break_indicator, source_ref=source_ref),
source=ExpressionConstantRef(constant=True, source_ref=source_ref),
source_ref=source_ref), StatementLoopBreak(source_ref=source_ref))
else:
statements = (StatementLoopBreak(source_ref=source_ref), )
pushBuildContext("loop_body")
loop_statements = buildStatementsNode(provider=provider,
nodes=node.body,
source_ref=source_ref)
popBuildContext()
# The loop body contains a conditional statement at the start that breaks
# the loop if it fails.
loop_body = makeStatementsSequence(statements=(StatementConditional(
condition=ExpressionOperationNOT(
operand=buildNode(provider, node.test, source_ref),
source_ref=source_ref,
),
yes_branch=StatementsSequence(statements=statements,
source_ref=source_ref),
no_branch=None,
source_ref=source_ref), loop_statements),
allow_none=True,
source_ref=source_ref)
loop_statement = StatementLoop(body=loop_body, source_ref=source_ref)
if else_block is None:
return loop_statement
else:
statements = (StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_break_indicator, source_ref=source_ref),
source=ExpressionConstantRef(constant=False,
source_ref=source_ref),
source_ref=source_ref), loop_statement,
StatementConditional(condition=ExpressionComparisonIs(
left=ExpressionTempVariableRef(
variable=tmp_break_indicator,
source_ref=source_ref),
right=ExpressionConstantRef(constant=True,
source_ref=source_ref),
source_ref=source_ref),
yes_branch=else_block,
no_branch=None,
source_ref=source_ref))
statements = (makeTryFinallyStatement(provider=provider,
tried=statements,
final=StatementReleaseVariable(
variable=tmp_break_indicator,
source_ref=source_ref),
source_ref=source_ref), )
return StatementsSequence(statements=mergeStatements(
statements, False),
source_ref=source_ref)
def wrapSuperBuiltin(type_arg, object_arg, source_ref):
if type_arg is None and python_version >= 300:
provider = node.getParentVariableProvider()
if python_version < 340 or True: # TODO: Temporarily reverted:
type_arg = ExpressionVariableRef(variable_name="__class__",
source_ref=source_ref)
# Ought to be already closure taken.
type_arg.setVariable(
provider.getVariableForClosure(variable_name="__class__"))
# If we already have this as a local variable, then use that
# instead.
if type_arg.getVariable().getOwner() is provider:
type_arg = None
else:
addVariableUsage(type_arg.getVariable(), provider)
else:
parent_provider = provider.getParentVariableProvider()
class_var = parent_provider.getTempVariable(temp_scope=None,
name="__class__")
type_arg = ExpressionTempVariableRef(variable=class_var,
source_ref=source_ref)
addVariableUsage(type_arg.getVariable(), provider)
if type_arg is None:
return makeRaiseExceptionReplacementExpression(
expression=node,
exception_type="SystemError"
if python_version < 331 else "RuntimeError",
exception_value="super(): __class__ cell not found",
)
if object_arg is None:
if provider.getParameters().getArgumentCount() > 0:
par1_name = provider.getParameters().getArgumentNames()[0]
# TODO: Nested first argument would kill us here, need a
# test for that.
object_arg = ExpressionVariableRef(variable_name=par1_name,
source_ref=source_ref)
object_arg.setVariable(
provider.getVariableForReference(
variable_name=par1_name))
if not object_arg.getVariable().isParameterVariable():
return makeRaiseExceptionReplacementExpression(
expression=node,
exception_type="SystemError"
if python_version < 330 else "RuntimeError",
exception_value="super(): __class__ cell not found",
)
else:
return makeRaiseExceptionReplacementExpression(
expression=node,
exception_type="RuntimeError",
exception_value="super(): no arguments")
return ExpressionBuiltinSuper(super_type=type_arg,
super_object=object_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 wrapEvalGlobalsAndLocals(provider, globals_node, locals_node,
temp_scope, source_ref):
""" Wrap the locals and globals arguments for "eval".
This is called from the outside, and when the node tree
already exists.
"""
globals_keeper_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "globals"
)
locals_keeper_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "locals"
)
if locals_node is None:
locals_node = ExpressionConstantNoneRef(
source_ref = source_ref
)
if globals_node is None:
globals_node = ExpressionConstantNoneRef(
source_ref = source_ref
)
post_statements = []
if provider.isExpressionClassBody():
post_statements.append(
StatementLocalsDictSync(
locals_arg = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref,
),
source_ref = source_ref.atInternal()
)
)
post_statements += [
StatementReleaseVariable(
variable = globals_keeper_variable,
source_ref = source_ref
),
StatementReleaseVariable(
variable = locals_keeper_variable,
source_ref = source_ref
)
]
# The locals default is dependent on exec_mode, globals or locals.
locals_default = ExpressionConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
expression_no = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
expression_yes = _getLocalsClassNode(provider)(
source_ref = source_ref
),
source_ref = source_ref
)
pre_statements = [
# First assign globals and locals temporary the values given.
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
source = globals_node,
source_ref = source_ref,
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source = locals_node,
source_ref = source_ref,
),
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatement(
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source = locals_default,
source_ref = source_ref,
)
),
no_branch = None,
source_ref = source_ref
),
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatement(
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
source = ExpressionBuiltinGlobals(
source_ref = source_ref
),
source_ref = source_ref,
)
),
no_branch = None,
source_ref = source_ref
)
]
return (
ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
if globals_node is None else
globals_node.getSourceReference()
),
ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
if locals_node is None else
locals_node.getSourceReference()
),
makeStatementsSequence(pre_statements, False, source_ref),
makeStatementsSequence(post_statements, False, source_ref)
)
def buildExecNode(provider, node, source_ref):
# "exec" statements, should only occur with Python2.
# This is using many variables, due to the many details this is
# dealing with. The locals and globals need to be dealt with in
# temporary variables, and we need handling of indicators, so
# that is just the complexity, pylint: disable=R0914
exec_globals = node.globals
exec_locals = node.locals
body = node.body
orig_globals = exec_globals
# Handle exec(a,b,c) to be same as exec a, b, c
if exec_locals is None and exec_globals is None and \
getKind(body) == "Tuple":
parts = body.elts
body = parts[0]
if len(parts) > 1:
exec_globals = parts[1]
if len(parts) > 2:
exec_locals = parts[2]
else:
return StatementRaiseException(
exception_type = ExpressionBuiltinExceptionRef(
exception_name = "TypeError",
source_ref = source_ref
),
exception_value = makeConstantRefNode(
constant = """\
exec: arg 1 must be a string, file, or code object""",
source_ref = source_ref
),
exception_trace = None,
exception_cause = None,
source_ref = source_ref
)
if not provider.isCompiledPythonModule():
provider.markAsExecContaining()
if orig_globals is None:
provider.markAsUnqualifiedExecContaining(source_ref)
temp_scope = provider.allocateTempScope("exec")
locals_value = buildNode(provider, exec_locals, source_ref, True)
if locals_value is None:
locals_value = ExpressionConstantNoneRef(
source_ref = source_ref
)
globals_value = buildNode(provider, exec_globals, source_ref, True)
if globals_value is None:
globals_value = ExpressionConstantNoneRef(
source_ref = source_ref
)
source_code = buildNode(provider, body, source_ref)
source_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "exec_source"
)
globals_keeper_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "globals"
)
locals_keeper_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "locals"
)
plain_indicator_variable = provider.allocateTempVariable(
temp_scope = temp_scope,
name = "plain"
)
tried = (
# First evaluate the source code expressions.
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = source_variable,
source_ref = source_ref
),
source = source_code,
source_ref = source_ref
),
# Assign globals and locals temporary the values given, then fix it
# up, taking note in the "plain" temporary variable, if it was an
# "exec" statement with None arguments, in which case the copy back
# will be necessary.
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
source = globals_value,
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source = locals_value,
source_ref = source_ref
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = plain_indicator_variable,
source_ref = source_ref
),
source = makeConstantRefNode(
constant = False,
source_ref = source_ref
),
source_ref = source_ref
),
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
source = ExpressionBuiltinGlobals(
source_ref = source_ref
),
source_ref = source_ref,
),
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatements(
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source = _getLocalsClassNode(provider)(
source_ref = source_ref
),
source_ref = source_ref,
),
StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = plain_indicator_variable,
source_ref = source_ref
),
source = makeConstantRefNode(
constant = True,
source_ref = source_ref
),
source_ref = source_ref,
)
),
no_branch = None,
source_ref = source_ref
),
),
no_branch = makeStatementsSequenceFromStatements(
StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
right = ExpressionConstantNoneRef(
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatement(
statement = StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
source_ref = source_ref,
)
),
no_branch = None,
source_ref = source_ref
)
),
source_ref = source_ref
),
# Source needs some special treatment for not done for "eval", if it's a
# file object, then must be read.
StatementConditional(
condition = ExpressionBuiltinIsinstance(
instance = ExpressionTempVariableRef(
variable = source_variable,
source_ref = source_ref
),
classes = ExpressionBuiltinAnonymousRef(
builtin_name = "file",
source_ref = source_ref,
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatement(
statement = StatementAssignmentVariable(
variable_ref = ExpressionTargetTempVariableRef(
variable = source_variable,
source_ref = source_ref
),
source = ExpressionCallEmpty(
called = ExpressionAttributeLookup(
source = ExpressionTempVariableRef(
variable = source_variable,
source_ref = source_ref
),
attribute_name = "read",
source_ref = source_ref
),
source_ref = source_ref
),
source_ref = source_ref
)
),
no_branch = None,
source_ref = source_ref
),
makeTryFinallyStatement(
provider = provider,
tried = StatementExec(
source_code = ExpressionTempVariableRef(
variable = source_variable,
source_ref = source_ref
),
globals_arg = ExpressionTempVariableRef(
variable = globals_keeper_variable,
source_ref = source_ref
),
locals_arg = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref
),
source_ref = source_ref
),
final = StatementConditional(
condition = ExpressionComparisonIs(
left = ExpressionTempVariableRef(
variable = plain_indicator_variable,
source_ref = source_ref
),
right = makeConstantRefNode(
constant = True,
source_ref = source_ref
),
source_ref = source_ref
),
yes_branch = makeStatementsSequenceFromStatement(
statement = StatementLocalsDictSync(
locals_arg = ExpressionTempVariableRef(
variable = locals_keeper_variable,
source_ref = source_ref,
),
source_ref = source_ref.atInternal()
)
),
no_branch = None,
source_ref = source_ref
),
source_ref = source_ref
)
)
final = (
StatementReleaseVariable(
variable = source_variable,
source_ref = source_ref
),
StatementReleaseVariable(
variable = globals_keeper_variable,
source_ref = source_ref
),
StatementReleaseVariable(
variable = locals_keeper_variable,
source_ref = source_ref
),
StatementReleaseVariable(
variable = plain_indicator_variable,
source_ref = source_ref
),
)
return makeTryFinallyStatement(
provider = provider,
tried = tried,
final = final,
source_ref = source_ref
)
def buildLambdaNode(provider, node, source_ref):
assert getKind(node) == "Lambda"
parameters = buildParameterSpec(provider, "<lambda>", node, source_ref)
function_body = ExpressionFunctionBody(
provider=provider,
name="<lambda>",
doc=None,
parameters=parameters,
is_class=False,
source_ref=source_ref,
)
defaults = buildNodeList(provider, node.args.defaults, source_ref)
kw_defaults = buildParameterKwDefaults(provider=provider,
node=node,
function_body=function_body,
source_ref=source_ref)
body = buildNode(
provider=function_body,
node=node.body,
source_ref=source_ref,
)
if function_body.isGenerator():
if Utils.python_version < 270:
tmp_return_value = function_body.allocateTempVariable(
temp_scope=None, name="yield_return")
statements = (StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
source=body,
source_ref=source_ref),
StatementConditional(
condition=ExpressionComparisonIsNOT(
left=ExpressionTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
right=ExpressionConstantRef(
constant=None, source_ref=source_ref),
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=StatementExpressionOnly(
expression=ExpressionYield(
expression=ExpressionTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
source_ref=source_ref),
source_ref=source_ref)),
no_branch=None,
source_ref=source_ref))
body = makeTryFinallyStatement(provider=provider,
tried=statements,
final=StatementReleaseVariable(
variable=tmp_return_value,
source_ref=source_ref),
source_ref=source_ref)
else:
body = StatementExpressionOnly(expression=body,
source_ref=source_ref)
else:
body = StatementReturn(expression=body, source_ref=source_ref)
body = StatementsFrame(
statements=mergeStatements((body, )),
guard_mode="generator" if function_body.isGenerator() else "full",
var_names=parameters.getCoArgNames(),
arg_count=parameters.getArgumentCount(),
kw_only_count=parameters.getKwOnlyParameterCount(),
has_starlist=parameters.getStarListArgumentName() is not None,
has_stardict=parameters.getStarDictArgumentName() is not None,
code_name="<lambda>",
source_ref=body.getSourceReference())
body = makeStatementsSequenceFromStatement(statement=body, )
function_body.setBody(body)
annotations = buildParameterAnnotations(provider, node, source_ref)
return ExpressionFunctionCreation(function_ref=ExpressionFunctionRef(
function_body=function_body, source_ref=source_ref),
defaults=defaults,
kw_defaults=kw_defaults,
annotations=annotations,
source_ref=source_ref)
def buildPrintNode(provider, node, source_ref):
# "print" statements, should only occur with Python2.
if node.dest is not None:
temp_scope = provider.allocateTempScope("print")
tmp_target_variable = provider.allocateTempVariable(
temp_scope=temp_scope, name="target")
target_default_statement = StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_target_variable, source_ref=source_ref),
source=ExpressionImportModuleHard(module_name="sys",
import_name="stdout",
source_ref=source_ref),
source_ref=source_ref)
statements = [
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_target_variable, source_ref=source_ref),
source=buildNode(provider=provider,
node=node.dest,
source_ref=source_ref),
source_ref=source_ref),
StatementConditional(
condition=ExpressionComparisonIs(
left=ExpressionTempVariableRef(
variable=tmp_target_variable, source_ref=source_ref),
right=ExpressionConstantRef(constant=None,
source_ref=source_ref),
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=target_default_statement),
no_branch=None,
source_ref=source_ref)
]
values = buildNodeList(provider=provider,
nodes=node.values,
source_ref=source_ref)
if node.dest is not None:
print_statements = [
StatementPrintValue(dest=ExpressionTempVariableRef(
variable=tmp_target_variable, source_ref=source_ref),
value=value,
source_ref=source_ref) for value in values
]
if node.nl:
print_statements.append(
StatementPrintNewline(dest=ExpressionTempVariableRef(
variable=tmp_target_variable, source_ref=source_ref),
source_ref=source_ref))
statements.append(
makeTryFinallyStatement(provider=provider,
tried=print_statements,
final=StatementReleaseVariable(
variable=tmp_target_variable,
source_ref=source_ref),
source_ref=source_ref))
else:
statements = [
StatementPrintValue(dest=None, value=value, source_ref=source_ref)
for value in values
]
if node.nl:
statements.append(
StatementPrintNewline(dest=None, source_ref=source_ref))
return makeStatementsSequenceFromStatements(*statements)
def buildLambdaNode(provider, node, source_ref):
# Many details to deal with, pylint: disable=R0914
assert getKind(node) == "Lambda"
function_kind, flags, _written_variables, _non_local_declarations, _global_declarations = \
detectFunctionBodyKind(
nodes = (node.body,)
)
outer_body, function_body, code_object = buildFunctionWithParsing(
provider=provider,
function_kind=function_kind,
name="<lambda>",
function_doc=None,
flags=flags,
node=node,
source_ref=source_ref)
if function_kind == "Function":
code_body = function_body
else:
code_body = ExpressionGeneratorObjectBody(provider=function_body,
name="<lambda>",
flags=set(),
source_ref=source_ref)
if function_kind == "Generator":
function_body.setBody(
makeStatementsSequenceFromStatement(statement=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)))
defaults = buildNodeList(provider, node.args.defaults, source_ref)
kw_defaults = buildParameterKwDefaults(provider=provider,
node=node,
function_body=function_body,
source_ref=source_ref)
body = buildNode(
provider=code_body,
node=node.body,
source_ref=source_ref,
)
if function_kind == "Generator":
if python_version < 270:
tmp_return_value = code_body.allocateTempVariable(
temp_scope=None, name="yield_return")
statements = (StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
source=body,
source_ref=source_ref),
StatementConditional(
condition=ExpressionComparisonIsNOT(
left=ExpressionTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
right=ExpressionConstantRef(
constant=None, source_ref=source_ref),
source_ref=source_ref),
yes_branch=makeStatementsSequenceFromStatement(
statement=StatementExpressionOnly(
expression=ExpressionYield(
expression=ExpressionTempVariableRef(
variable=tmp_return_value,
source_ref=source_ref,
),
source_ref=source_ref),
source_ref=source_ref)),
no_branch=None,
source_ref=source_ref))
body = makeTryFinallyStatement(provider=provider,
tried=statements,
final=StatementReleaseVariable(
variable=tmp_return_value,
source_ref=source_ref),
source_ref=source_ref)
else:
body = StatementExpressionOnly(expression=body,
source_ref=source_ref)
else:
body = StatementReturn(expression=body, source_ref=source_ref)
body = StatementsFrame(
statements=mergeStatements((body, )),
code_object=code_object,
guard_mode="generator" if function_kind == "Generator" else "full",
source_ref=body.getSourceReference())
body = makeStatementsSequenceFromStatement(statement=body, )
code_body.setBody(body)
annotations = buildParameterAnnotations(provider, node, source_ref)
return ExpressionFunctionCreation(function_ref=ExpressionFunctionRef(
function_body=outer_body, source_ref=source_ref),
code_object=code_object,
defaults=defaults,
kw_defaults=kw_defaults,
annotations=annotations,
source_ref=source_ref)
def _buildContractionBodyNode(provider, node, emit_class, start_value,
container_tmp, iter_tmp, temp_scope,
assign_provider, function_body, source_ref):
# This uses lots of variables and branches. There is no good way
# around that, and we deal with many cases, due to having generator
# expressions sharing this code, pylint: disable=too-many-branches,too-many-locals
# Note: The assign_provider is only to cover Python2 list contractions,
# assigning one of the loop variables to the outside scope.
tmp_variables = []
if assign_provider:
tmp_variables.append(iter_tmp)
if container_tmp is not None:
tmp_variables.append(container_tmp)
# First assign the iterator if we are an outline.
if assign_provider:
statements = [
StatementAssignmentVariable(
variable_ref=makeVariableTargetRefNode(variable=iter_tmp,
source_ref=source_ref),
source=ExpressionBuiltinIter1(value=buildNode(
provider=provider,
node=node.generators[0].iter,
source_ref=source_ref),
source_ref=source_ref),
source_ref=source_ref.atInternal())
]
else:
statements = []
if start_value is not None:
statements.append(
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=container_tmp, source_ref=source_ref),
source=start_value,
source_ref=source_ref.atInternal()))
if hasattr(node, "elt"):
if start_value is not None:
current_body = emit_class(ExpressionTempVariableRef(
variable=container_tmp, 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
current_body = emit_class(buildNode(provider=function_body,
node=node.elt,
source_ref=source_ref),
source_ref=source_ref)
else:
assert emit_class is StatementDictOperationSet
current_body = StatementDictOperationSet(
dict_arg=ExpressionTempVariableRef(variable=container_tmp,
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)
if current_body.isExpression():
current_body = StatementExpressionOnly(expression=current_body,
source_ref=source_ref)
for count, qual in enumerate(reversed(node.generators)):
tmp_value_variable = function_body.allocateTempVariable(
temp_scope=temp_scope, name="iter_value_%d" % count)
tmp_variables.append(tmp_value_variable)
# The first iterated value is to be calculated outside of the function
# and will be given as a parameter "_iterated", the others are built
# inside the function.
if qual is node.generators[0]:
iterator_ref = makeVariableRefNode(variable=iter_tmp,
source_ref=source_ref)
tmp_iter_variable = None
nested_statements = []
else:
# First create the iterator and store it, next should be loop body
value_iterator = ExpressionBuiltinIter1(value=buildNode(
provider=function_body, node=qual.iter, source_ref=source_ref),
source_ref=source_ref)
tmp_iter_variable = function_body.allocateTempVariable(
temp_scope=temp_scope, name="contraction_iter_%d" % count)
tmp_variables.append(tmp_iter_variable)
nested_statements = [
StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_iter_variable, source_ref=source_ref),
source=value_iterator,
source_ref=source_ref)
]
iterator_ref = ExpressionTempVariableRef(
variable=tmp_iter_variable, source_ref=source_ref)
loop_statements = [
makeTryExceptSingleHandlerNode(
tried=StatementAssignmentVariable(
variable_ref=ExpressionTargetTempVariableRef(
variable=tmp_value_variable, source_ref=source_ref),
source=ExpressionBuiltinNext1(value=iterator_ref,
source_ref=source_ref),
source_ref=source_ref),
exception_name="StopIteration",
handler_body=StatementLoopBreak(
source_ref=source_ref.atInternal()),
source_ref=source_ref),
buildAssignmentStatements(
provider=provider if assign_provider else function_body,
temp_provider=function_body,
node=qual.target,
source=ExpressionTempVariableRef(variable=tmp_value_variable,
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=buildAndNode(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=mergeStatements(loop_statements),
source_ref=source_ref),
source_ref=source_ref))
if tmp_iter_variable is not None:
nested_statements.append(
StatementReleaseVariable(variable=tmp_iter_variable,
source_ref=source_ref))
current_body = StatementsSequence(statements=mergeStatements(
nested_statements, False),
source_ref=source_ref)
statements.append(current_body)
statements = mergeStatements(statements)
release_statements = [
StatementReleaseVariable(variable=tmp_variable, source_ref=source_ref)
for tmp_variable in tmp_variables
]
return statements, release_statements