Start implemeting contexts with specialized TreeNameDefinitions to avoid gambling with the parser.

jedi/api/completion.py

@@ -29,6 +29,7 @@ def get_call_signature_param_names(call_signatures):
 def filter_names(evaluator, completion_names, stack, like_name):
     comp_dct = {}
     for name in set(completion_names):
+        print(name)
         if settings.case_insensitive_completion \
                 and str(name).lower().startswith(like_name.lower()) \
                 or str(name).startswith(like_name):
@@ -193,11 +194,11 @@ class Completion:
 
     def _trailer_completions(self, atom_expr):
         user_scope = get_user_scope(self._module, self._position)
-        scopes = self._evaluator.eval_element(atom_expr)
+        contexts = self._evaluator.eval_element(self._evaluator.create_context(atom_expr), atom_expr)
         completion_names = []
-        debug.dbg('trailer completion scopes: %s', scopes)
-        for s in scopes:
-            for filter in s.get_filters(search_global=False, origin_scope=user_scope):
+        debug.dbg('trailer completion contexts: %s', contexts)
+        for context in contexts:
+            for filter in context.get_filters(search_global=False, origin_scope=user_scope):
                 completion_names += filter.values()
         return completion_names
 

jedi/api/interpreter.py

@@ -5,7 +5,7 @@ import copy
 
 from jedi.cache import underscore_memoization
 from jedi.evaluate import helpers
-from jedi.evaluate.representation import ModuleWrapper
+from jedi.evaluate.representation import ModuleContext
 from jedi.evaluate.compiled import mixed
 
 
@@ -18,7 +18,7 @@ class MixedModule(object):
         self._namespaces = namespaces
 
         self._namespace_objects = [type('jedi_namespace', (), n) for n in namespaces]
-        self._wrapped_module = ModuleWrapper(evaluator, parser_module)
+        self._wrapped_module = ModuleContext(evaluator, parser_module)
         # Usually we are dealing with very small code sizes when it comes to
         # interpreter modules. In this case we just copy the whole syntax tree
         # to be able to modify it.

jedi/evaluate/__init__.py

@@ -109,20 +109,20 @@ class Evaluator(object):
         self.recursion_detector = recursion.RecursionDetector(self)
         self.execution_recursion_detector = recursion.ExecutionRecursionDetector(self)
 
-    def wrap(self, element):
+    def wrap(self, element, parent_context=None):
         if isinstance(element, (er.Wrapper, er.InstanceElement,
-            er.ModuleWrapper, er.FunctionExecution, er.Instance, compiled.CompiledObject)) or element is None:
+            er.ModuleContext, er.FunctionExecution, er.Instance, compiled.CompiledObject)) or element is None:
             # TODO this is so ugly, please refactor.
             return element
 
         if element.type == 'classdef':
-            return er.Class(self, element)
+            return er.ClassContext(self, element, parent_context)
         elif element.type == 'funcdef':
             return er.Function(self, element)
         elif element.type == 'lambda':
             return er.LambdaWrapper(self, element)
         elif element.type == 'file_input':
-            return er.ModuleWrapper(self, element)
+            return er.ModuleContext(self, element)
         else:
             return element
 
@@ -145,7 +145,7 @@ class Evaluator(object):
     #@memoize_default(default=[], evaluator_is_first_arg=True)
     #@recursion.recursion_decorator
     @debug.increase_indent
-    def eval_statement(self, stmt, seek_name=None):
+    def eval_statement(self, context, stmt, seek_name=None):
         """
         The starting point of the completion. A statement always owns a call
         list, which are the calls, that a statement does. In case multiple
@@ -156,7 +156,7 @@ class Evaluator(object):
         """
         debug.dbg('eval_statement %s (%s)', stmt, seek_name)
         rhs = stmt.get_rhs()
-        types = self.eval_element(rhs)
+        types = self.eval_element(context, rhs)
 
         if seek_name:
             types = finder.check_tuple_assignments(self, types, seek_name)
@@ -177,13 +177,13 @@ class Evaluator(object):
                 # only in for loops without clutter, because they are
                 # predictable. Also only do it, if the variable is not a tuple.
                 node = for_stmt.get_input_node()
-                for_iterables = self.eval_element(node)
+                for_iterables = self.eval_element(context, node)
                 ordered = list(iterable.py__iter__(self, for_iterables, node))
 
                 for index_types in ordered:
                     dct = {str(for_stmt.children[1]): index_types}
                     self.predefined_if_name_dict_dict[for_stmt] = dct
-                    t = self.eval_element(rhs)
+                    t = self.eval_element(context, rhs)
                     left = precedence.calculate(self, left, operator, t)
                 types = left
                 if ordered:
@@ -196,11 +196,11 @@ class Evaluator(object):
         debug.dbg('eval_statement result %s', types)
         return types
 
-    def eval_element(self, element):
+    def eval_element(self, context, element):
         if isinstance(element, iterable.AlreadyEvaluated):
             return set(element)
         elif isinstance(element, iterable.MergedNodes):
-            return iterable.unite(self.eval_element(e) for e in element)
+            return iterable.unite(self.eval_element(context, e) for e in element)
 
         if_stmt = element.get_parent_until((tree.IfStmt, tree.ForStmt, tree.IsScope))
         predefined_if_name_dict = self.predefined_if_name_dict_dict.get(if_stmt)
@@ -249,21 +249,21 @@ class Evaluator(object):
                 for name_dict in name_dicts:
                     self.predefined_if_name_dict_dict[if_stmt] = name_dict
                     try:
-                        result |= self._eval_element_not_cached(element)
+                        result |= self._eval_element_not_cached(context, element)
                     finally:
                         del self.predefined_if_name_dict_dict[if_stmt]
                 return result
             else:
-                return self._eval_element_if_evaluated(element)
-                return self._eval_element_cached(element)
+                return self._eval_element_if_evaluated(context, element)
+                return self._eval_element_cached(context, element)
         else:
             if predefined_if_name_dict:
-                return self._eval_element_not_cached(element)
+                return self._eval_element_not_cached(context, element)
             else:
-                return self._eval_element_if_evaluated(element)
-                return self._eval_element_cached(element)
+                return self._eval_element_if_evaluated(context, element)
+                return self._eval_element_cached(context, element)
 
-    def _eval_element_if_evaluated(self, element):
+    def _eval_element_if_evaluated(self, context, element):
         """
         TODO This function is temporary: Merge with eval_element.
         """
@@ -272,19 +272,19 @@ class Evaluator(object):
             parent = parent.parent
             predefined_if_name_dict = self.predefined_if_name_dict_dict.get(parent)
             if predefined_if_name_dict is not None:
-                return self._eval_element_not_cached(element)
-        return self._eval_element_cached(element)
+                return self._eval_element_not_cached(context, element)
+        return self._eval_element_cached(context, element)
 
     @memoize_default(default=set(), evaluator_is_first_arg=True)
-    def _eval_element_cached(self, element):
-        return self._eval_element_not_cached(element)
+    def _eval_element_cached(self, context, element):
+        return self._eval_element_not_cached(context, element)
 
     @debug.increase_indent
-    def _eval_element_not_cached(self, element):
+    def _eval_element_not_cached(self, context, element):
         debug.dbg('eval_element %s@%s', element, element.start_pos)
         types = set()
         if isinstance(element, (tree.Name, tree.Literal)) or tree.is_node(element, 'atom'):
-            types = self._eval_atom(element)
+            types = self._eval_atom(context, element)
         elif isinstance(element, tree.Keyword):
             # For False/True/None
             if element.value in ('False', 'True', 'None'):
@@ -295,12 +295,12 @@ class Evaluator(object):
         elif element.isinstance(er.LambdaWrapper):
             types = set([element])  # TODO this is no real evaluation.
         elif element.type == 'expr_stmt':
-            types = self.eval_statement(element)
+            types = self.eval_statement(context, element)
         elif element.type in ('power', 'atom_expr'):
-            types = self._eval_atom(element.children[0])
+            types = self._eval_atom(context, element.children[0])
             for trailer in element.children[1:]:
                 if trailer == '**':  # has a power operation.
-                    right = self.eval_element(element.children[2])
+                    right = self.eval_element(context, element.children[2])
                     types = set(precedence.calculate(self, types, trailer, right))
                     break
                 types = self.eval_trailer(types, trailer)
@@ -308,31 +308,31 @@ class Evaluator(object):
             # The implicit tuple in statements.
             types = set([iterable.ImplicitTuple(self, element)])
         elif element.type in ('not_test', 'factor'):
-            types = self.eval_element(element.children[-1])
+            types = self.eval_element(context, element.children[-1])
             for operator in element.children[:-1]:
                 types = set(precedence.factor_calculate(self, types, operator))
         elif element.type == 'test':
             # `x if foo else y` case.
-            types = (self.eval_element(element.children[0]) |
-                     self.eval_element(element.children[-1]))
+            types = (self.eval_element(context, element.children[0]) |
+                     self.eval_element(context, element.children[-1]))
         elif element.type == 'operator':
             # Must be an ellipsis, other operators are not evaluated.
             assert element.value == '...'
             types = set([compiled.create(self, Ellipsis)])
         elif element.type == 'dotted_name':
-            types = self._eval_atom(element.children[0])
+            types = self._eval_atom(context, element.children[0])
             for next_name in element.children[2::2]:
                 types = set(chain.from_iterable(self.find_types(typ, next_name)
                                                 for typ in types))
             types = types
         elif element.type == 'eval_input':
-            types = self._eval_element_not_cached(element.children[0])
+            types = self._eval_element_not_cached(context, element.children[0])
         else:
             types = precedence.calculate_children(self, element.children)
         debug.dbg('eval_element result %s', types)
         return types
 
-    def _eval_atom(self, atom):
+    def _eval_atom(self, context, atom):
         """
         Basically to process ``atom`` nodes. The parser sometimes doesn't
         generate the node (because it has just one child). In that case an atom
@@ -442,25 +442,25 @@ class Evaluator(object):
             debug.dbg('execute result: %s in %s', types, obj)
             return types
 
-    def goto_definitions(self, name):
+    def goto_definitions(self, context, name):
         def_ = name.get_definition()
         is_simple_name = name.parent.type not in ('power', 'trailer')
         if is_simple_name:
             if name.parent.type in ('file_input', 'classdef', 'funcdef'):
                 return [self.wrap(name.parent)]
             if def_.type == 'expr_stmt' and name in def_.get_defined_names():
-                return self.eval_statement(def_, name)
+                return self.eval_statement(context, def_, name)
             elif def_.type == 'for_stmt':
-                container_types = self.eval_element(def_.children[3])
+                container_types = self.eval_element(context, def_.children[3])
                 for_types = iterable.py__iter__types(self, container_types, def_.children[3])
                 return finder.check_tuple_assignments(self, for_types, name)
             elif def_.type in ('import_from', 'import_name'):
                 return imports.ImportWrapper(self, name).follow()
 
         call = helpers.call_of_leaf(name)
-        return self.eval_element(call)
+        return self.eval_element(context, call)
 
-    def goto(self, name):
+    def goto(self, context, name):
         def resolve_implicit_imports(names):
             for name in names:
                 if isinstance(name.parent, helpers.FakeImport):
@@ -480,13 +480,13 @@ class Evaluator(object):
                 trailer = trailer.parent
             if trailer.type != 'classdef':
                 if trailer.type == 'decorator':
-                    types = self.eval_element(trailer.children[1])
+                    types = self.eval_element(context, trailer.children[1])
                 else:
                     i = trailer.parent.children.index(trailer)
                     to_evaluate = trailer.parent.children[:i]
-                    types = self.eval_element(to_evaluate[0])
+                    types = self.eval_element(context, to_evaluate[0])
                     for trailer in to_evaluate[1:]:
-                        types = self.eval_trailer(types, trailer)
+                        types = self.eval_trailer(context, types, trailer)
                 param_names = []
                 for typ in types:
                     try:
@@ -511,7 +511,7 @@ class Evaluator(object):
             if index > 0:
                 new_dotted = helpers.deep_ast_copy(par)
                 new_dotted.children[index - 1:] = []
-                types = self.eval_element(new_dotted)
+                types = self.eval_element(context, new_dotted)
                 return resolve_implicit_imports(iterable.unite(
                     self.find_types(typ, name, is_goto=True) for typ in types
                 ))
@@ -519,7 +519,7 @@ class Evaluator(object):
         scope = name.get_parent_scope()
         if tree.is_node(par, 'trailer') and par.children[0] == '.':
             call = helpers.call_of_leaf(name, cut_own_trailer=True)
-            types = self.eval_element(call)
+            types = self.eval_element(context, call)
             return resolve_implicit_imports(iterable.unite(
                 self.find_types(typ, name, is_goto=True) for typ in types
             ))
@@ -530,3 +530,9 @@ class Evaluator(object):
                 stmt = name
             return self.find_types(scope, name, stmt.start_pos,
                                    search_global=True, is_goto=True)
+
+    def create_context(self, node):
+        scope = node.get_parent_scope()
+        if scope.get_parent_scope() is not None:
+            raise NotImplementedError
+        return self.wrap(scope)

jedi/evaluate/compiled/__init__.py

@@ -271,15 +271,10 @@ class CompiledName(FakeName):
     def is_definition(self):
         return True
 
-    @property
     @underscore_memoization
-    def parent(self):
+    def infer(self):
         module = self._compiled_obj.get_parent_until()
-        return _create_from_name(self._evaluator, module, self._compiled_obj, self.name)
-
-    @parent.setter
-    def parent(self, value):
-        pass  # Just ignore this, FakeName tries to overwrite the parent attribute.
+        return [_create_from_name(self._evaluator, module, self._compiled_obj, self.name)]
 
 
 class LazyNamesDict(object):

jedi/evaluate/filters.py

@@ -9,6 +9,44 @@ from jedi.evaluate import flow_analysis
 from jedi.common import to_list
 
 
+class AbstractNameDefinition(object):
+    start_pos = None
+
+    @property
+    @abstractmethod
+    def string_name(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def infer(self):
+        raise NotImplementedError
+
+
+class TreeNameDefinition(AbstractNameDefinition):
+    def __init__(self, parent_context, name):
+        self.parent_context = parent_context
+        self._name = name
+
+    def get_parent_flow_context(self):
+        return self.parent_context
+
+    @property
+    def string_name(self):
+        return self._name.value
+
+    @property
+    def start_pos(self):
+        return self._name.start_pos
+
+    def infer(self):
+        # Refactor this, should probably be here.
+        from jedi.evaluate.finder import _name_to_types
+        return _name_to_types(self.parent_context._evaluator, self.parent_context, self._name, None)
+
+    def __repr__(self):
+        return '%s: %s@%s' % (type(self).__name__, self.string_name, self.start_pos)
+
+
 class AbstractFilter(object):
     _until_position = None
 
@@ -30,10 +68,11 @@ class AbstractFilter(object):
 
 
 class AbstractUsedNamesFilter(AbstractFilter):
-    def __init__(self, parser_scope, origin_scope=None):
+    def __init__(self, context, parser_scope, origin_scope=None):
         super(AbstractUsedNamesFilter, self).__init__(origin_scope)
         self._parser_scope = parser_scope
         self._used_names = self._parser_scope.get_root_node().used_names
+        self._context = context
 
     def get(self, name):
         try:
@@ -41,16 +80,19 @@ class AbstractUsedNamesFilter(AbstractFilter):
         except KeyError:
             return []
 
-        return list(self._filter(names))
+        return self._convert_to_names(self._filter(names))
+
+    def _convert_to_names(self, names):
+        return [TreeNameDefinition(self._context, name) for name in names]
 
     def values(self):
-        return [name for name_list in self._used_names.values()
-                for name in self._filter(name_list)]
+        return self._convert_to_names(name for name_list in self._used_names.values()
+                                      for name in self._filter(name_list))
 
 
 class ParserTreeFilter(AbstractUsedNamesFilter):
-    def __init__(self, evaluator, parser_scope, until_position=None, origin_scope=None):
-        super(ParserTreeFilter, self).__init__(parser_scope, origin_scope)
+    def __init__(self, evaluator, context, parser_scope, until_position=None, origin_scope=None):
+        super(ParserTreeFilter, self).__init__(context, parser_scope, origin_scope)
         self._until_position = until_position
         self._evaluator = evaluator
 
@@ -65,8 +107,9 @@ class ParserTreeFilter(AbstractUsedNamesFilter):
         for name in sorted(names, key=lambda name: name.start_pos, reverse=True):
             stmt = name.get_definition()
             name_scope = self._evaluator.wrap(stmt.get_parent_scope())
-            check = flow_analysis.break_check(self._evaluator, name_scope,
-                                              stmt, self._origin_scope)
+            check = flow_analysis.UNSURE
+            #check = flow_analysis.break_check(self._evaluator, name_scope,
+            #                                  stmt, self._origin_scope)
             if check is not flow_analysis.UNREACHABLE:
                 yield name
 
@@ -75,7 +118,7 @@ class ParserTreeFilter(AbstractUsedNamesFilter):
 
 
 class FunctionExecutionFilter(ParserTreeFilter):
-    def __init__(self, evaluator, parser_scope, executed_function, param_by_name,
+    def __init__(self, evaluator, context, parser_scope, executed_function, param_by_name,
                  until_position=None, origin_scope=None):
         super(FunctionExecutionFilter, self).__init__(
             evaluator,
@@ -96,8 +139,8 @@ class FunctionExecutionFilter(ParserTreeFilter):
 
 
 class GlobalNameFilter(AbstractUsedNamesFilter):
-    def __init__(self, parser_scope, origin_scope=None):
-        super(GlobalNameFilter, self).__init__(parser_scope)
+    def __init__(self, context, parser_scope, origin_scope=None):
+        super(GlobalNameFilter, self).__init__(context, parser_scope)
 
     @to_list
     def _filter(self, names):
@@ -141,7 +184,7 @@ def get_global_filters(evaluator, context, until_position, origin_scope):
                 until_position = None
                 in_func = True
 
-        node = context.get_parent_scope()
+        node = context.parent_context
         context = evaluator.wrap(node)
 
     # Add builtins to the global scope.

jedi/evaluate/finder.py

@@ -179,7 +179,7 @@ class NameFinder(object):
                 last_names.append(name)
                 continue
 
-            if isinstance(stmt, er.ModuleWrapper):
+            if isinstance(stmt, er.ModuleContext):
                 # In case of REPL completion, we can infer modules names that
                 # don't really have a definition (because they are really just
                 # namespaces). In this case we can just add it.
@@ -258,17 +258,19 @@ class NameFinder(object):
         wrapper parents. We don't want to see AST classes out in the
         evaluation, so remove them already here!
         """
-        for n in names:
-            definition = n.parent
-            if isinstance(definition, (compiled.CompiledObject,
-                iterable.BuiltinMethod)):
-                # TODO this if should really be removed by changing the type of
-                #      those classes.
-                yield n
-            elif definition.type in ('funcdef', 'classdef', 'file_input'):
-                yield self._evaluator.wrap(definition).name
-            else:
-                yield n
+
+        return names
+        #for n in names:
+        #    definition = n.parent
+        #    if isinstance(definition, (compiled.CompiledObject,
+        #        iterable.BuiltinMethod)):
+        #        # TODO this if should really be removed by changing the type of
+        #        #      those classes.
+        #        yield n
+        #    elif definition.type in ('funcdef', 'classdef', 'file_input'):
+        #        yield self._evaluator.wrap(definition).name
+        #    else:
+        #        yield n
 
     def _check_getattr(self, inst):
         """Checks for both __getattr__ and __getattribute__ methods"""
@@ -308,8 +310,8 @@ class NameFinder(object):
                     return n
 
         for name in names:
-            new_types = _name_to_types(self._evaluator, name, self.scope)
-            if isinstance(self.scope, (er.Class, er.Instance)) and attribute_lookup:
+            new_types = name.infer()
+            if isinstance(self.scope, (er.ClassContext, er.Instance)) and attribute_lookup:
                 types |= set(self._resolve_descriptors(name, new_types))
             else:
                 types |= set(new_types)
@@ -347,7 +349,7 @@ def _get_global_stmt_scopes(evaluator, global_stmt, name):
 
 
 @memoize_default(set(), evaluator_is_first_arg=True)
-def _name_to_types(evaluator, name, scope):
+def _name_to_types(evaluator, context, name, scope):
     types = []
     typ = name.get_definition()
     if typ.isinstance(tree.ForStmt):
@@ -365,7 +367,7 @@ def _name_to_types(evaluator, name, scope):
     elif isinstance(typ, tree.Param):
         types = _eval_param(evaluator, typ, scope)
     elif typ.isinstance(tree.ExprStmt):
-        types = _remove_statements(evaluator, typ, name)
+        types = _remove_statements(evaluator, context, typ, name)
     elif typ.isinstance(tree.WithStmt):
         types = evaluator.eval_element(typ.node_from_name(name))
     elif isinstance(typ, tree.Import):
@@ -393,7 +395,7 @@ def _name_to_types(evaluator, name, scope):
     return types
 
 
-def _remove_statements(evaluator, stmt, name):
+def _remove_statements(evaluator, context, stmt, name):
     """
     This is the part where statements are being stripped.
 
@@ -415,7 +417,7 @@ def _remove_statements(evaluator, stmt, name):
         pep0484.find_type_from_comment_hint_assign(evaluator, stmt, name)
     if pep0484types:
         return pep0484types
-    types |= evaluator.eval_statement(stmt, seek_name=name)
+    types |= evaluator.eval_statement(context, stmt, seek_name=name)
 
     if check_instance is not None:
         # class renames

jedi/evaluate/flow_analysis.py

@@ -33,6 +33,7 @@ UNSURE = Status(None, 'unsure')
 
 
 def break_check(evaluator, base_scope, stmt, origin_scope=None):
+    raise NotImplementedError
     element_scope = evaluator.wrap(stmt.get_parent_scope(include_flows=True))
     # Direct parents get resolved, we filter scopes that are separate branches.
     # This makes sense for autocompletion and static analysis. For actual

jedi/evaluate/param.py

@@ -30,7 +30,7 @@ def try_iter_content(types, depth=0):
 
 
 class Arguments(tree.Base):
-    def __init__(self, evaluator, argument_node, trailer=None):
+    def __init__(self, evaluator, context, argument_node, trailer=None):
         """
         The argument_node is either a parser node or a list of evaluated
         objects. Those evaluated objects may be lists of evaluated objects
@@ -39,6 +39,7 @@ class Arguments(tree.Base):
         :param argument_node: May be an argument_node or a list of nodes.
         """
         self.argument_node = argument_node
+        self._context = context
         self._evaluator = evaluator
         self.trailer = trailer  # Can be None, e.g. in a class definition.
 
@@ -73,7 +74,7 @@ class Arguments(tree.Base):
                 element = self.argument_node[0]
                 from jedi.evaluate.iterable import AlreadyEvaluated
                 if isinstance(element, AlreadyEvaluated):
-                    element = list(self._evaluator.eval_element(element))[0]
+                    element = list(self._evaluator.eval_element(self._context, element))[0]
             except IndexError:
                 return None
             else:
@@ -93,14 +94,14 @@ class Arguments(tree.Base):
         named_args = []
         for stars, el in self._split():
             if stars == 1:
-                arrays = self._evaluator.eval_element(el)
+                arrays = self._evaluator.eval_element(self._context, el)
                 iterators = [_iterate_star_args(self._evaluator, a, el, func)
                              for a in arrays]
                 iterators = list(iterators)
                 for values in list(zip_longest(*iterators)):
                     yield None, [v for v in values if v is not None]
             elif stars == 2:
-                arrays = self._evaluator.eval_element(el)
+                arrays = self._evaluator.eval_element(self._context, el)
                 dicts = [_star_star_dict(self._evaluator, a, el, func)
                          for a in arrays]
                 for dct in dicts:
@@ -155,7 +156,7 @@ class Arguments(tree.Base):
                 debug.warning('TypeError: %s expected at least %s arguments, got %s',
                               name, len(arguments), i)
                 raise ValueError
-            values = set(chain.from_iterable(self._evaluator.eval_element(el)
+            values = set(chain.from_iterable(self._evaluator.eval_element(self._context, el)
                                              for el in va_values))
             if not values and not optional:
                 # For the stdlib we always want values. If we don't get them,
@@ -172,7 +173,7 @@ class Arguments(tree.Base):
     def eval_args(self):
         # TODO this method doesn't work with named args and a lot of other
         # things. Use unpack.
-        return [self._evaluator.eval_element(el) for stars, el in self._split()]
+        return [self._evaluator.eval_element(self._context, el) for stars, el in self._split()]
 
     def __repr__(self):
         return '<%s: %s>' % (type(self).__name__, self.argument_node)
@@ -191,7 +192,7 @@ class Arguments(tree.Base):
         """
         for key, element_values in self.unpack():
             for element in element_values:
-                types = self._evaluator.eval_element(element)
+                types = self._evaluator.eval_element(self._context, element)
                 try_iter_content(types)
 
 

jedi/evaluate/representation.py

@@ -59,6 +59,21 @@ from jedi.evaluate.filters import ParserTreeFilter, FunctionExecutionFilter, \
     GlobalNameFilter, DictFilter
 
 
+class Context(object):
+    def __init__(self, evaluator, parent_context=None):
+        self._evaluator = evaluator
+        self.parent_context = parent_context
+
+    def get_parent_flow_context(self):
+        return self.parent_context
+
+
+class FlowContext(Context):
+    def get_parent_flow_context(self):
+        if 1:
+            return self.parent_context
+
+
 class Executed(tree.Base):
     """
     An instance is also an executable - because __init__ is called
@@ -152,7 +167,7 @@ class Instance(use_metaclass(CachedMetaClass, Executed)):
         # This loop adds the names of the self object, copies them and removes
         # the self.
         for sub in self.base.subscopes:
-            if isinstance(sub, tree.Class):
+            if isinstance(sub, tree.ClassContext):
                 continue
             # Get the self name, if there's one.
             self_name = self._get_func_self_name(sub)
@@ -292,18 +307,18 @@ class CompiledInstanceClassFilter(compiled.CompiledObjectFilter):
 
 
 class InstanceClassFilter(ParserTreeFilter):
-    def __init__(self, evaluator, instance, parser_scope, origin_scope):
+    def __init__(self, evaluator, context, parser_scope, origin_scope):
         super(InstanceClassFilter, self).__init__(
             evaluator=evaluator,
+            context=context,
             parser_scope=parser_scope,
             origin_scope=origin_scope
         )
-        self._instance = instance
 
     def _equals_origin_scope(self):
         node = self._origin_scope
         while node is not None:
-            if node == self._parser_scope or node == self._instance:
+            if node == self._parser_scope or node == self._context:
                 return True
             node = node.get_parent_scope()
         return False
@@ -314,7 +329,7 @@ class InstanceClassFilter(ParserTreeFilter):
 
     def _filter(self, names):
         names = super(InstanceClassFilter, self)._filter(names)
-        return [get_instance_el(self._evaluator, self._instance, name, True)
+        return [get_instance_el(self._evaluator, self._context, name, True)
                 for name in names if self._access_possible(name)]
 
     def _check_flows(self, names):
@@ -337,12 +352,12 @@ class SelfNameFilter(InstanceClassFilter):
                     and len(trailer.children) == 2 \
                     and trailer.children[0] == '.':
                 if name.is_definition() and self._access_possible(name):
-                    init_execution = self._instance._get_init_execution()
+                    init_execution = self._context._get_init_execution()
                     # Hopefully we can somehow change this.
                     if init_execution is not None and \
                             init_execution.start_pos < name.start_pos < init_execution.end_pos:
                         name = init_execution.name_for_position(name.start_pos)
-                    yield get_instance_el(self._evaluator, self._instance, name)
+                    yield get_instance_el(self._evaluator, self._context, name)
 
 
 class LazyInstanceDict(object):
@@ -406,8 +421,8 @@ class InstanceElement(use_metaclass(CachedMetaClass, tree.Base)):
     @memoize_default()
     def parent(self):
         par = self.var.parent
-        if isinstance(par, Class) and par == self.instance.base \
-                or not isinstance(self.instance.base, (tree.Class, Class)) \
+        if isinstance(par, ClassContext) and par == self.instance.base \
+                or not isinstance(self.instance.base, (tree.Class, ClassContext)) \
                 or isinstance(par, tree.Class) \
                 and par == self.instance.base.base:
             par = self.instance
@@ -501,13 +516,13 @@ class Wrapper(tree.Base):
         return helpers.FakeName(unicode(name), self, name.start_pos)
 
 
-class Class(use_metaclass(CachedMetaClass, Wrapper)):
+class ClassContext(use_metaclass(CachedMetaClass, Context, Wrapper)):
     """
     This class is not only important to extend `tree.Class`, it is also a
     important for descriptors (if the descriptor methods are evaluated or not).
     """
-    def __init__(self, evaluator, base):
-        self._evaluator = evaluator
+    def __init__(self, evaluator, base, parent_context):
+        super(ClassContext, self).__init__(evaluator, parent_context=parent_context)
         self.base = base
 
     @memoize_default(default=())
@@ -547,7 +562,7 @@ class Class(use_metaclass(CachedMetaClass, Wrapper)):
     def py__bases__(self):
         arglist = self.base.get_super_arglist()
         if arglist:
-            args = param.Arguments(self._evaluator, arglist)
+            args = param.Arguments(self._evaluator, self, arglist)
             return list(chain.from_iterable(args.eval_args()))
         else:
             return [compiled.create(self._evaluator, object)]
@@ -577,14 +592,14 @@ class Class(use_metaclass(CachedMetaClass, Wrapper)):
 
     def get_filters(self, search_global, until_position=None, origin_scope=None, is_instance=False):
         if search_global:
-            yield ParserTreeFilter(self._evaluator, self.base, until_position, origin_scope=origin_scope)
+            yield ParserTreeFilter(self._evaluator, self, self.base, until_position, origin_scope=origin_scope)
         else:
             for scope in self.py__mro__():
                 if isinstance(scope, compiled.CompiledObject):
                     for filter in scope.get_filters(is_instance=is_instance):
                         yield filter
                 else:
-                    yield ParserTreeFilter(self._evaluator, scope.base, origin_scope=origin_scope)
+                    yield ParserTreeFilter(self._evaluator, self, scope.base, origin_scope=origin_scope)
 
     def is_class(self):
         return True
@@ -684,7 +699,7 @@ class Function(use_metaclass(CachedMetaClass, Wrapper)):
 
     def get_filters(self, search_global, until_position=None, origin_scope=None):
         if search_global:
-            yield ParserTreeFilter(self._evaluator, self.base, until_position, origin_scope=origin_scope)
+            yield ParserTreeFilter(self._evaluator, self, self.base, until_position, origin_scope=origin_scope)
         else:
             scope = self.py__class__()
             for filter in scope.get_filters(search_global=False, origin_scope=origin_scope):
@@ -862,7 +877,7 @@ class FunctionExecution(Executed):
                     del evaluator.predefined_if_name_dict_dict[for_stmt]
 
     def get_filters(self, search_global, until_position=None, origin_scope=None):
-        yield FunctionExecutionFilter(self._evaluator, self._original_function,
+        yield FunctionExecutionFilter(self._evaluator, self, self._original_function,
                                       self._copied_funcdef,
                                       self.param_by_name,
                                       until_position,
@@ -923,7 +938,9 @@ class GlobalName(helpers.FakeName):
                                          name.start_pos, is_definition=True)
 
 
-class ModuleWrapper(use_metaclass(CachedMetaClass, tree.Module, Wrapper)):
+class ModuleContext(use_metaclass(CachedMetaClass, tree.Module, Wrapper)):
+    parent_context = None
+
     def __init__(self, evaluator, module, parent_module=None):
         self._evaluator = evaluator
         self.base = self._module = module
@@ -942,11 +959,12 @@ class ModuleWrapper(use_metaclass(CachedMetaClass, tree.Module, Wrapper)):
     def get_filters(self, search_global, until_position=None, origin_scope=None):
         yield ParserTreeFilter(
             self._evaluator,
+            self,
             self._module,
             until_position,
             origin_scope=origin_scope
         )
-        yield GlobalNameFilter(self._module)
+        yield GlobalNameFilter(self, self._module)
         yield DictFilter(self._sub_modules_dict())
         yield DictFilter(self._module_attributes_dict())
         # TODO