def create_get_type_of_member(owner_var,
member_name,
lineno,
col_offset,
test_unreferenced=True):
comment = create_src_comment(
"Obtaining the member '{0}' of a type".format(member_name), lineno)
localization = create_localization(lineno, col_offset)
# TODO: Remove?
# get_type_of_member_func = core_language_copy.create_Name('get_type_of_member')
# get_type_of_member_call = functions_copy.create_call(get_type_of_member_func, [localization, owner_var,
# core_language_copy.create_str(
# member_name)])
get_type_of_member_func = core_language_copy.create_attribute(
owner_var, 'get_type_of_member')
if not test_unreferenced:
get_type_of_member_call = functions_copy.create_call(
get_type_of_member_func, [
localization,
core_language_copy.create_str(member_name),
core_language_copy.create_Name('False')
])
else:
get_type_of_member_call = functions_copy.create_call(
get_type_of_member_func,
[localization,
core_language_copy.create_str(member_name)])
member_stmts, member_var = create_temp_Assign(get_type_of_member_call,
lineno, col_offset)
return flatten_lists(comment, member_stmts), member_var
def create_get_type_of(var_name, lineno, col_offset, test_unreferenced=True):
get_type_of_comment = create_src_comment(
"Getting the type of '{0}'".format(var_name), lineno)
get_type_of_method = core_language_copy.create_attribute(
default_module_type_store_var_name,
"get_type_of",
line=lineno,
column=col_offset)
localization = create_localization(lineno, col_offset)
if test_unreferenced:
get_type_of_call = functions_copy.create_call(
get_type_of_method,
[localization,
core_language_copy.create_str(var_name)])
else:
get_type_of_call = functions_copy.create_call(get_type_of_method, [
localization,
core_language_copy.create_str(var_name),
core_language_copy.create_Name('False')
])
assign_stmts, temp_assign = create_temp_Assign(get_type_of_call, lineno,
col_offset)
return flatten_lists(get_type_of_comment, assign_stmts), temp_assign
def create_unsupported_feature_call(localization, feature_name, feature_desc,
lineno, col_offset):
"""
Creates AST nodes to call to the unsupported_python_feature function
"""
unsupported_feature_func = core_language_copy.create_Name(
'unsupported_python_feature', line=lineno, column=col_offset)
unsupported_feature = core_language_copy.create_str(feature_name)
unsupported_description = core_language_copy.create_str(feature_desc)
return functions_copy.create_call_expression(
unsupported_feature_func,
[localization, unsupported_feature, unsupported_description])
def create_keyword_dict(keywords):
dict_node = ast.Dict(ctx=ast.Load(), keys=[], values=[])
if keywords is not None:
for elem in keywords:
dict_node.keys.append(core_language_copy.create_str(elem))
dict_node.values.append(keywords[elem])
return dict_node
def create_set_type_of(var_name, new_value, lineno, col_offset):
set_type_of_comment = create_src_comment("Type assignment", lineno)
set_type_of_method = core_language_copy.create_attribute(
default_module_type_store_var_name, "set_type_of")
localization = create_localization(lineno, col_offset)
set_type_of_call = functions_copy.create_call_expression(
set_type_of_method, [
localization,
core_language_copy.create_str(var_name, lineno, col_offset),
new_value
])
return flatten_lists(set_type_of_comment, set_type_of_call)
def create_stacktrace_push(func_name, declared_arguments):
"""
Creates an AST Node that model the call to the localitazion.set_stack_trace method
:param func_name: Name of the function that will do the push to the stack trace
:param declared_arguments: Arguments of the call
:return: An AST Expr node
"""
# Code to push a new stack trace to handle errors.
attribute = core_language_copy.create_attribute("localization", "set_stack_trace")
arguments_var = core_language_copy.create_Name("arguments")
stack_push_call = create_call(attribute, [core_language_copy.create_str(func_name), declared_arguments, arguments_var])
stack_push = ast.Expr()
stack_push.value = stack_push_call
return stack_push
def create_context_set(func_name, lineno, col_offset):
"""
Creates an AST Node that model the call to the type_store.set_context method
:param func_name: Name of the function that will do the push to the stack trace
:param lineno: Line
:param col_offset: Column
:return: An AST Expr node
"""
attribute = core_language_copy.create_attribute("type_store", "set_context")
context_set_call = create_call(attribute, [core_language_copy.create_str(func_name),
core_language_copy.create_num(lineno),
core_language_copy.create_num(col_offset)])
context_set = ast.Expr()
context_set.value = context_set_call
return context_set
def create_unary_operator(operator_name, left_op, lineno, col_offset):
"""
Creates AST Nodes to model an unary operator
:param operator_name: Name of the operator
:param left_op: operand (AST Node)
:param lineno: Line
:param col_offset: Column
:return: List of instructions
"""
operator_symbol = operator_name_to_symbol(operator_name)
op_name = core_language_copy.create_str(operator_symbol)
operation_comment = create_src_comment(
"Applying the '{0}' unary operator".format(operator_symbol), lineno)
operator_call, result_var = create_temp_Assign(
operators_copy.create_unary_operator(op_name, left_op, lineno,
col_offset), lineno, col_offset)
return flatten_lists(operation_comment, operator_call), result_var
def obtain_arg_list(args, ismethod=False, isstaticmethod=False):
"""
Creates an AST List node with the names of the arguments passed to a function
:param args: Arguments
:param ismethod: Whether to count the first argument (self) or not
:return: An AST List
"""
arg_list = ast.List()
arg_list.elts = []
if ismethod and not isstaticmethod:
arg_list_contents = args.args[1:]
else:
arg_list_contents = args.args
for arg in arg_list_contents:
arg_list.elts.append(core_language_copy.create_str(arg.id))
return arg_list
def create_set_type_of_member(owner_var, member_name, value, lineno,
col_offset):
comment = create_src_comment(
"Setting the type of the member '{0}' of a type".format(member_name),
lineno)
localization = create_localization(lineno, col_offset)
# TODO: Remove?
# set_type_of_member_func = core_language_copy.create_Name('set_type_of_member')
# set_type_of_member_call = functions_copy.create_call_expression(set_type_of_member_func, [localization, onwer_var,
# core_language_copy.create_str(
# member_name), value])
set_type_of_member_func = core_language_copy.create_attribute(
owner_var, 'set_type_of_member')
set_type_of_member_call = functions_copy.create_call_expression(
set_type_of_member_func,
[localization,
core_language_copy.create_str(member_name), value])
return flatten_lists(comment, set_type_of_member_call)
def create_arg_number_test(function_def_node, context=[]):
"""
Creates an AST Node that model the call to the process_argument_values method. This method is used to check
the parameters passed to a function/method in a type inference program
:param function_def_node: AST Node with the function definition
:param context: Context passed to the call
:return: List of AST nodes that perform the call to the mentioned function and make the necessary tests once it
is called
"""
args_test_resul = core_language_copy.create_Name('arguments', False)
# Call to arg test function
func = core_language_copy.create_Name('process_argument_values')
# Fixed parameters
localization_arg = core_language_copy.create_Name('localization')
type_store_arg = core_language_copy.create_Name('type_store')
# Declaration data arguments
# Func name
if is_method(context):
function_name_arg = core_language_copy.create_str(context[-1].name + "." + function_def_node.name)
type_of_self_arg = core_language_copy.create_Name('type_of_self')
else:
function_name_arg = core_language_copy.create_str(function_def_node.name)
type_of_self_arg = core_language_copy.create_Name('None')
# Declared param names list
param_names_list_arg = obtain_arg_list(function_def_node.args, is_method(context),
is_static_method(function_def_node))
# Declared var args parameter name
if function_def_node.args.vararg is None:
declared_varargs = None
else:
declared_varargs = function_def_node.args.vararg
varargs_param_name = core_language_copy.create_str(declared_varargs)
# Declared kwargs parameter name
if function_def_node.args.kwarg is None:
declared_kwargs = None
else:
declared_kwargs = function_def_node.args.kwarg
kwargs_param_name = core_language_copy.create_str(declared_kwargs)
# Call data arguments
# Declared defaults list name
call_defaults = core_language_copy.create_Name('defaults') # function_def_node.args.defaults
# Call varargs
call_varargs = core_language_copy.create_Name('varargs')
# Call kwargs
call_kwargs = core_language_copy.create_Name('kwargs')
# Parameter number check call
call = create_call(func,
[localization_arg, type_of_self_arg, type_store_arg, function_name_arg, param_names_list_arg,
varargs_param_name, kwargs_param_name, call_defaults, call_varargs, call_kwargs])
assign = core_language_copy.create_Assign(args_test_resul, call)
# After parameter number check call
argument_errors = core_language_copy.create_Name('arguments')
is_error_type = core_language_copy.create_Name('is_error_type')
if_test = create_call(is_error_type, argument_errors)
if is_constructor(function_def_node):
argument_errors = None # core_language.create_Name('None')
body = [create_context_unset(), create_return(argument_errors)]
if_ = conditional_statements_copy.create_if(if_test, body)
return [assign, if_]