from abc import abstractproperty

from jedi._compatibility import is_py3

from jedi.common import unite

from jedi import debug

from jedi.evaluate import compiled

from jedi.evaluate import filters

from jedi.evaluate.context import Context, LazyKnownContext, LazyKnownContexts

from jedi.evaluate.cache import memoize_default

from jedi.cache import memoize_method

from jedi.evaluate import representation as er

from jedi.evaluate.dynamic import search_params

from jedi.evaluate import iterable

class AbstractInstanceContext(Context):

"""

This class is used to evaluate instances.

"""

api_type = 'instance'

def __init__(self, evaluator, parent_context, class_context, var_args):

super(AbstractInstanceContext, self).__init__(evaluator, parent_context)

# Generated instances are classes that are just generated by self

# (No var_args) used.

self.class_context = class_context

self.var_args = var_args

def is_class(self):

return False

@property

def py__call__(self):

names = self.get_function_slot_names('__call__')

if not names:

# Means the Instance is not callable.

raise AttributeError

def execute(arguments):

return unite(name.execute(arguments) for name in names)

return execute

def py__class__(self):

return self.class_context

def py__bool__(self):

# Signalize that we don't know about the bool type.

return None

def get_function_slot_names(self, name):

# Python classes don't look at the dictionary of the instance when

# looking up `__call__`. This is something that has to do with Python's

# internal slot system (note: not __slots__, but C slots).

for filter in self.get_filters(include_self_names=False):

names = filter.get(name)

if names:

return names

return []

def execute_function_slots(self, names, *evaluated_args):

return unite(

name.execute_evaluated(*evaluated_args)

for name in names

)

def py__get__(self, obj):

# Arguments in __get__ descriptors are obj, class.

# `method` is the new parent of the array, don't know if that's good.

names = self.get_function_slot_names('__get__')

if names:

if isinstance(obj, AbstractInstanceContext):

return self.execute_function_slots(names, obj, obj.class_context)

else:

none_obj = compiled.create(self.evaluator, None)

return self.execute_function_slots(names, none_obj, obj)

else:

return set([self])

def get_filters(self, search_global=None, until_position=None,

origin_scope=None, include_self_names=True):

if include_self_names:

for cls in self.class_context.py__mro__():

if isinstance(cls, compiled.CompiledObject):

if cls.tree_node is not None:

# In this case we're talking about a fake object, it

# doesn't make sense for normal compiled objects to

# search for self variables.

yield SelfNameFilter(self.evaluator, self, cls, origin_scope)

else:

yield SelfNameFilter(self.evaluator, self, cls, origin_scope)

for cls in self.class_context.py__mro__():

if isinstance(cls, compiled.CompiledObject):

yield CompiledInstanceClassFilter(self.evaluator, self, cls)

else:

yield InstanceClassFilter(self.evaluator, self, cls, origin_scope)

def py__getitem__(self, index):

try:

names = self.get_function_slot_names('__getitem__')

except KeyError:

debug.warning('No __getitem__, cannot access the array.')

return set()

else:

index_obj = compiled.create(self.evaluator, index)

return self.execute_function_slots(names, index_obj)

def py__iter__(self):

iter_slot_names = self.get_function_slot_names('__iter__')

if not iter_slot_names:

debug.warning('No __iter__ on %s.' % self)

return

for generator in self.execute_function_slots(iter_slot_names):

if isinstance(generator, AbstractInstanceContext):

# `__next__` logic.

name = '__next__' if is_py3 else 'next'

iter_slot_names = generator.get_function_slot_names(name)

if iter_slot_names:

yield LazyKnownContexts(

generator.execute_function_slots(iter_slot_names)

)

else:

debug.warning('Instance has no __next__ function in %s.', generator)

else:

for lazy_context in generator.py__iter__():

yield lazy_context

@abstractproperty

def name(self):

pass

def _create_init_execution(self, class_context, func_node):

bound_method = BoundMethod(

self.evaluator, self, class_context, self.parent_context, func_node

)

return InstanceFunctionExecution(

self,

class_context.parent_context,

bound_method,

self.var_args

)

def create_init_executions(self):

for name in self.get_function_slot_names('__init__'):

if isinstance(name, LazyInstanceName):

yield self._create_init_execution(name.class_context, name.tree_name.parent)

@memoize_default()

def create_instance_context(self, class_context, node):

if node.parent.type in ('funcdef', 'classdef'):

node = node.parent

scope = node.get_parent_scope()

if scope == class_context.tree_node:

return class_context

else:

parent_context = self.create_instance_context(class_context, scope)

if scope.type == 'funcdef':

if scope.name.value == '__init__' and parent_context == class_context:

return self._create_init_execution(class_context, scope)

else:

bound_method = BoundMethod(

self.evaluator, self, class_context,

self.parent_context, scope

)

return bound_method.get_function_execution()

else:

raise NotImplementedError

return class_context

def __repr__(self):

return "<%s of %s(%s)>" % (self.__class__.__name__, self.class_context,

self.var_args)

class CompiledInstance(AbstractInstanceContext):

def __init__(self, *args, **kwargs):

super(CompiledInstance, self).__init__(*args, **kwargs)

# I don't think that dynamic append lookups should happen here. That

# sounds more like something that should go to py__iter__.

if self.class_context.name.string_name in ['list', 'set'] \

and self.parent_context.get_root_context() == self.evaluator.BUILTINS:

# compare the module path with the builtin name.

self.var_args = iterable.get_dynamic_array_instance(self)

@property

def name(self):

return compiled.CompiledContextName(self, self.class_context.name.string_name)

def create_instance_context(self, class_context, node):

if node.get_parent_scope().type == 'classdef':

return class_context

else:

return super(CompiledInstance, self).create_instance_context(class_context, node)

class TreeInstance(AbstractInstanceContext):

@property

def name(self):

return filters.ContextName(self, self.class_context.name.tree_name)

class AnonymousInstance(TreeInstance):

def __init__(self, evaluator, parent_context, class_context):

super(AnonymousInstance, self).__init__(

evaluator,

parent_context,

class_context,

var_args=None

)

class CompiledInstanceName(compiled.CompiledName):

def __init__(self, evaluator, instance, parent_context, name):

super(CompiledInstanceName, self).__init__(evaluator, parent_context, name)

self._instance = instance

def infer(self):

for result_context in super(CompiledInstanceName, self).infer():

if isinstance(result_context, er.FunctionContext):

parent_context = result_context.parent_context

while parent_context.is_class():

parent_context = parent_context.parent_context

yield BoundMethod(

result_context.evaluator, self._instance, self.parent_context,

parent_context, result_context.tree_node

)

else:

if result_context.api_type == 'function':

yield CompiledBoundMethod(result_context)

else:

yield result_context

class CompiledInstanceClassFilter(compiled.CompiledObjectFilter):

name_class = CompiledInstanceName

def __init__(self, evaluator, instance, compiled_object):

super(CompiledInstanceClassFilter, self).__init__(

evaluator,

compiled_object,

is_instance=True,

)

self._instance = instance

def _create_name(self, name):

return self.name_class(

self._evaluator, self._instance, self._compiled_object, name)

class BoundMethod(er.FunctionContext):

def __init__(self, evaluator, instance, class_context, *args, **kwargs):

super(BoundMethod, self).__init__(evaluator, *args, **kwargs)

self._instance = instance

self._class_context = class_context

def get_function_execution(self, arguments=None):

if arguments is None:

return AnonymousInstanceFunctionExecution(

self._instance, self.parent_context, self)

else:

return InstanceFunctionExecution(

self._instance, self.parent_context, self, arguments)

class CompiledBoundMethod(compiled.CompiledObject):

def __init__(self, func):

super(CompiledBoundMethod, self).__init__(

func.evaluator, func.obj, func.parent_context, func.tree_node)

def get_param_names(self):

return list(super(CompiledBoundMethod, self).get_param_names())[1:]

class InstanceNameDefinition(filters.TreeNameDefinition):

def infer(self):

contexts = super(InstanceNameDefinition, self).infer()

for context in contexts:

yield context

class LazyInstanceName(filters.TreeNameDefinition):

"""

This name calculates the parent_context lazily.

"""

def __init__(self, instance, class_context, tree_name):

self._instance = instance

self.class_context = class_context

self.tree_name = tree_name

@property

def parent_context(self):

return self._instance.create_instance_context(self.class_context, self.tree_name)

class LazyInstanceClassName(LazyInstanceName):

def infer(self):

for result_context in super(LazyInstanceClassName, self).infer():

if isinstance(result_context, er.FunctionContext):

# Classes are never used to resolve anything within the

# functions. Only other functions and modules will resolve

# those things.

parent_context = result_context.parent_context

while parent_context.is_class():

parent_context = parent_context.parent_context

yield BoundMethod(

result_context.evaluator, self._instance, self.class_context,

parent_context, result_context.tree_node

)

else:

for c in er.apply_py__get__(result_context, self._instance):

yield c

class InstanceClassFilter(filters.ParserTreeFilter):

name_class = LazyInstanceClassName

def __init__(self, evaluator, context, class_context, origin_scope):

super(InstanceClassFilter, self).__init__(

evaluator=evaluator,

context=context,

node_context=class_context,

origin_scope=origin_scope

)

self._class_context = class_context

def _equals_origin_scope(self):

node = self._origin_scope

while node is not None:

if node == self._parser_scope or node == self.context:

return True

node = node.get_parent_scope()

return False

def _access_possible(self, name):

return not name.value.startswith('__') or name.value.endswith('__') \

or self._equals_origin_scope()

def _filter(self, names):

names = super(InstanceClassFilter, self)._filter(names)

return [name for name in names if self._access_possible(name)]

def _convert_names(self, names):

return [self.name_class(self.context, self._class_context, name) for name in names]

class SelfNameFilter(InstanceClassFilter):

name_class = LazyInstanceName

def _filter(self, names):

names = self._filter_self_names(names)

if isinstance(self._parser_scope, compiled.CompiledObject) and False:

# This would be for builtin skeletons, which are not yet supported.

return list(names)

else:

start, end = self._parser_scope.start_pos, self._parser_scope.end_pos

return [n for n in names if start < n.start_pos < end]

def _filter_self_names(self, names):

for name in names:

trailer = name.parent

if trailer.type == 'trailer' \

and len(trailer.children) == 2 \

and trailer.children[0] == '.':

if name.is_definition() and self._access_possible(name):

yield name

def _check_flows(self, names):

return names

class ParamArguments(object):

"""

TODO This seems like a strange class, clean up?

"""

class LazyParamContext(object):

def __init__(self, fucking_param):

self._param = fucking_param

def infer(self):

return self._param.infer()

def __init__(self, class_context, funcdef):

self._class_context = class_context

self._funcdef = funcdef

def unpack(self, func=None):

params = search_params(

self._class_context.evaluator,

self._class_context,

self._funcdef

)

is_first = True

for p in params:

# TODO Yeah, here at last, the class seems to be really wrong.

if is_first:

is_first = False

continue

yield None, self.LazyParamContext(p)

class InstanceVarArgs(object):

def __init__(self, instance, funcdef, var_args):

self._instance = instance

self._funcdef = funcdef

self._var_args = var_args

@memoize_method

def _get_var_args(self):

if self._var_args is None:

# TODO this parent_context might be wrong. test?!

return ParamArguments(self._instance.class_context, self._funcdef)

return self._var_args

def unpack(self, func=None):

yield None, LazyKnownContext(self._instance)

for values in self._get_var_args().unpack(func):

yield values

def get_calling_nodes(self):

return self._get_var_args().get_calling_nodes()

def __getattr__(self, name):

return getattr(self._var_args, name)

class InstanceFunctionExecution(er.FunctionExecutionContext):

def __init__(self, instance, parent_context, function_context, var_args):

self.instance = instance

var_args = InstanceVarArgs(instance, function_context.tree_node, var_args)

super(InstanceFunctionExecution, self).__init__(

instance.evaluator, parent_context, function_context, var_args)

class AnonymousInstanceFunctionExecution(InstanceFunctionExecution):

function_execution_filter = filters.AnonymousInstanceFunctionExecutionFilter

def __init__(self, instance, parent_context, function_context):

super(AnonymousInstanceFunctionExecution, self).__init__(

instance, parent_context, function_context, None)