Fixes to decorators and *arg functions.

jedi/evaluate/__init__.py

@@ -410,9 +410,6 @@ class Evaluator(object):
         if self.is_analysis:
             arguments.eval_all()
 
-        if isinstance(obj, er.FunctionContext):
-            obj = obj.get_decorated_func()
-
         debug.dbg('execute: %s %s', obj, arguments)
         try:
             # Some stdlib functions like super(), namedtuple(), etc. have been

jedi/evaluate/context.py

@@ -23,8 +23,8 @@ class Context(object):
         """
         Execute a function with already executed arguments.
         """
-        from jedi.evaluate.param import ValueArguments
-        return self.execute(ValueArguments(value_list))
+        from jedi.evaluate.param import ValuesArguments
+        return self.execute(ValuesArguments(value_list))
 
     def eval_node(self, node):
         return self._evaluator.eval_element(self, node)

jedi/evaluate/finder.py

@@ -351,50 +351,81 @@ def _get_global_stmt_scopes(evaluator, global_stmt, name):
 @memoize_default(set(), evaluator_is_first_arg=True)
 def _name_to_types(evaluator, context, name, scope):
     types = []
-    typ = name.get_definition()
-    if typ.isinstance(tree.ForStmt):
-        types = pep0484.find_type_from_comment_hint_for(evaluator, typ, name)
+    node = name.get_definition()
+    if node.isinstance(tree.ForStmt):
+        types = pep0484.find_type_from_comment_hint_for(evaluator, node, name)
         if types:
             return types
-    if typ.isinstance(tree.WithStmt):
-        types = pep0484.find_type_from_comment_hint_with(evaluator, typ, name)
+    if node.isinstance(tree.WithStmt):
+        types = pep0484.find_type_from_comment_hint_with(evaluator, node, name)
         if types:
             return types
-    if typ.type in ('for_stmt', 'comp_for'):
-        container_types = context.eval_node(typ.children[3])
-        for_types = iterable.py__iter__types(evaluator, container_types, typ.children[3])
+    if node.type in ('for_stmt', 'comp_for'):
+        container_types = context.eval_node(node.children[3])
+        for_types = iterable.py__iter__types(evaluator, container_types, node.children[3])
         types = check_tuple_assignments(evaluator, for_types, name)
-    elif isinstance(typ, tree.Param):
-        types = _eval_param(evaluator, context, typ, scope)
-    elif typ.isinstance(tree.ExprStmt):
-        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):
+    elif isinstance(node, tree.Param):
+        return set()  # TODO remove
+        types = _eval_param(evaluator, context, node, scope)
+    elif node.isinstance(tree.ExprStmt):
+        types = _remove_statements(evaluator, context, node, name)
+    elif node.isinstance(tree.WithStmt):
+        types = evaluator.eval_element(node.node_from_name(name))
+    elif isinstance(node, tree.Import):
         types = imports.ImportWrapper(evaluator, name).follow()
-    elif typ.isinstance(tree.Function, tree.Class):
-        types = [evaluator.wrap(typ, parent_context=context)]
-    elif typ.type == 'global_stmt':
-        for s in _get_global_stmt_scopes(evaluator, typ, name):
+    elif node.type in ('funcdef', 'classdef'):
+        types = _apply_decorators(evaluator, context, node)
+    elif node.type == 'global_stmt':
+        for s in _get_global_stmt_scopes(evaluator, node, name):
             finder = NameFinder(evaluator, s, str(name))
             names_dicts = finder.get_filters(search_global=True)
             # For global_stmt lookups, we only need the first possible scope,
             # which means the function itself.
             names_dicts = [next(names_dicts)]
             types += finder.find(names_dicts, attribute_lookup=False)
-    elif isinstance(typ, tree.TryStmt):
+    elif isinstance(node, tree.TryStmt):
         # TODO an exception can also be a tuple. Check for those.
         # TODO check for types that are not classes and add it to
         # the static analysis report.
         exceptions = evaluator.eval_element(name.get_previous_sibling().get_previous_sibling())
         types = set(chain.from_iterable(evaluator.execute(t) for t in exceptions))
     else:
-        if typ.isinstance(er.Function):
-            typ = typ.get_decorated_func()
-        types = set([typ])
+        raise DeprecationWarning
+        types = set([node])
     return types
 
 
+def _apply_decorators(evaluator, context, node):
+    """
+    Returns the function, that should to be executed in the end.
+    This is also the places where the decorators are processed.
+    """
+    decoratee_context = evaluator.wrap(node, parent_context=context)
+    initial = values = set([decoratee_context])
+    for dec in reversed(node.get_decorators()):
+        debug.dbg('decorator: %s %s', dec, values)
+        dec_values = context.eval_node(dec.children[1])
+        trailer = dec.children[2:-1]
+        if trailer:
+            # Create a trailer and evaluate it.
+            trailer = tree.Node('trailer', trailer)
+            trailer.parent = dec
+            dec_values = context.eval_trailer(dec_values, trailer)
+
+        if not len(dec_values):
+            debug.warning('decorator not found: %s on %s', dec, node)
+            return initial
+
+        values = unite(dec_value.execute(param.ValuesArguments([values]))
+                       for dec_value in dec_values)
+        if not len(values):
+            debug.warning('not possible to resolve wrappers found %s', node)
+            return initial
+
+        debug.dbg('decorator end %s', values)
+    return values
+
+
 def _remove_statements(evaluator, context, stmt, name):
     """
     This is the part where statements are being stripped.

jedi/evaluate/instance.py

@@ -188,8 +188,7 @@ class InstanceClassFilter(ParserTreeFilter):
 
     def _filter(self, names):
         names = super(InstanceClassFilter, self)._filter(names)
-        return [get_instance_el(self._evaluator, self._context, name, True)
-                for name in names if self._access_possible(name)]
+        return [name for name in names if self._access_possible(name)]
 
     def _check_flows(self, names):
         return names
@@ -207,7 +206,7 @@ class SelfNameFilter(InstanceClassFilter):
     def _filter_self_names(self, names):
         for name in names:
             trailer = name.parent
-            if tree.is_node(trailer, 'trailer') \
+            if trailer.type == 'trailer' \
                     and len(trailer.children) == 2 \
                     and trailer.children[0] == '.':
                 if name.is_definition() and self._access_possible(name):
@@ -216,4 +215,4 @@ class SelfNameFilter(InstanceClassFilter):
                     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._context, name)
+                    yield name

jedi/evaluate/iterable.py

@@ -386,6 +386,7 @@ class ArrayLiteralContext(AbstractSequence, ArrayMixin):
         function returns the value for a certain index.
         """
         if self.type == 'dict':
+            raise NotImplementedError
             # Get keys.
             types = set()
             for k, _ in self._items():
@@ -442,9 +443,11 @@ class ArrayLiteralContext(AbstractSequence, ArrayMixin):
 
 class _FakeArray(ArrayLiteralContext):
     def __init__(self, evaluator, container, type):
-        self.type = type
+        # TODO is this class really needed?
+        self._array_type = type
         self._evaluator = evaluator
         self.atom = container
+        self.parent_context = evaluator.BUILTINS
 
 
 class ImplicitTuple(_FakeArray):
@@ -458,28 +461,25 @@ class ImplicitTuple(_FakeArray):
 
 
 class FakeSequence(_FakeArray):
-    def __init__(self, evaluator, type, context_sets):
+    def __init__(self, evaluator, array_type, lazy_context_list):
         """
         type should be one of "tuple", "list"
         """
-        super(FakeSequence, self).__init__(evaluator, context_sets, type)
-        self._context_sets = context_sets
-
-    def _resolve(self, context_set):
-        for x in context_set:
-            try:
-                infer = x.infer
-            except AttributeError:
-                yield x
-            else:
-                for value in infer():
-                    yield value
+        super(FakeSequence, self).__init__(evaluator, None, array_type)
+        self._lazy_context_list = lazy_context_list
 
     def _items(self):
-        return self._context_sets
+        raise DeprecationWarning
+        return self._context_list
 
     def py__getitem__(self, index):
-        return set(self._resolve(self._context_sets[index]))
+        return self._lazy_context_list[index].infer()
+
+    def py__iter__(self):
+        return self._lazy_context_list
+
+    def __repr__(self):
+        return "<%s of %s>" % (type(self).__name__, self._lazy_context_list)
 
 
 def create_evaluated_sequence_set(evaluator, *types_order, **kwargs):
@@ -520,9 +520,10 @@ class FakeDict(_FakeArray):
         yield set(compiled.create(self._evaluator, key) for key in self._dct)
 
     def py__getitem__(self, index):
-        return unite(self._evaluator.eval_element(v) for v in self._dct[index])
+        return self._dct[index].infer()
 
     def _items(self):
+        raise DeprecationWarning
         for key, values in self._dct.items():
             # TODO this is not proper. The values could be multiple values?!
             yield key, values[0]

jedi/evaluate/param.py

@@ -130,11 +130,13 @@ class TreeArguments(AbstractArguments):
         named_args = []
         for stars, el in self._split():
             if stars == 1:
-                arrays = self._evaluator.eval_element(self._context, el)
+                arrays = self._context.eval_node(el)
                 iterators = [_iterate_star_args(self._evaluator, a, el, func)
                              for a in arrays]
                 iterators = list(iterators)
                 for values in list(zip_longest(*iterators)):
+                    # TODO zip_longest yields None, that means this would raise
+                    # an exception?
                     yield None, context.get_merged_lazy_context(values)
             elif stars == 2:
                 arrays = self._evaluator.eval_element(self._context, el)
@@ -142,6 +144,7 @@ class TreeArguments(AbstractArguments):
                          for a in arrays]
                 for dct in dicts:
                     for key, values in dct.items():
+                        raise NotImplementedError
                         yield key, values
             else:
                 if tree.is_node(el, 'argument'):
@@ -177,19 +180,19 @@ class TreeArguments(AbstractArguments):
         return _get_calling_var_args(self._evaluator, self)
 
 
-class ValueArguments(AbstractArguments):
-    def __init__(self, value_list):
-        self._value_list = value_list
+class ValuesArguments(AbstractArguments):
+    def __init__(self, values_list):
+        self._values_list = values_list
 
     def unpack(self, func=None):
-        for value in self._value_list:
-            yield None, context.LazyKnownContext(value)
+        for values in self._values_list:
+            yield None, context.LazyKnownContexts(values)
 
     def get_calling_var_args(self):
         return None
 
     def __repr__(self):
-        return '<%s: %s>' % (type(self).__name__, self._value_list)
+        return '<%s: %s>' % (type(self).__name__, self._values_list)
 
 
 class ExecutedParam(object):
@@ -242,11 +245,10 @@ def get_params(evaluator, parent_context, func, var_args):
     for param in func.params:
         param_dict[str(param.name)] = param
     unpacked_va = list(var_args.unpack(func))
-    from jedi.evaluate.representation import InstanceElement
-    if isinstance(func, InstanceElement):
-        raise DeprecationWarning
-        # Include self at this place.
-        unpacked_va.insert(0, (None, [func.instance]))
+    from jedi.evaluate.instance import TreeInstance
+    if isinstance(parent_context, TreeInstance):
+        # Include the self parameter here.
+        unpacked_va.insert(0, (None, context.LazyKnownContext(parent_context)))
     var_arg_iterator = common.PushBackIterator(iter(unpacked_va))
 
     non_matching_keys = defaultdict(lambda: [])
@@ -291,16 +293,16 @@ def get_params(evaluator, parent_context, func, var_args):
 
         if param.stars == 1:
             # *args param
-            values_list = []
+            lazy_context_list = []
             if argument is not None:
-                values_list.append([argument])
+                lazy_context_list.append(argument)
                 for key, argument in var_arg_iterator:
                     # Iterate until a key argument is found.
                     if key:
                         var_arg_iterator.push_back((key, argument))
                         break
-                    values_list.append([argument])
-            seq = iterable.FakeSequence(evaluator, 'tuple', values_list)
+                    lazy_context_list.append(argument)
+            seq = iterable.FakeSequence(evaluator, 'tuple', lazy_context_list)
             result_arg = context.LazyKnownContext(seq)
         elif param.stars == 2:
             # **kwargs param

jedi/evaluate/representation.py

@@ -522,68 +522,10 @@ class FunctionContext(use_metaclass(CachedMetaClass, context.TreeContext, Wrappe
     """
     Needed because of decorators. Decorators are evaluated here.
     """
-    def __init__(self, evaluator, parent_context, func, is_decorated=False):
+    def __init__(self, evaluator, parent_context, func):
         """ This should not be called directly """
         super(FunctionContext, self).__init__(evaluator, parent_context)
         self.base = self.base_func = func
-        self.is_decorated = is_decorated
-        # A property that is set by the decorator resolution.
-        self.decorates = None
-
-    @memoize_default()
-    def get_decorated_func(self):
-        """
-        Returns the function, that should to be executed in the end.
-        This is also the places where the decorators are processed.
-        """
-        f = self.base_func
-        decorators = self.base_func.get_decorators()
-
-        if not decorators or self.is_decorated:
-            return self
-
-        # Only enter it, if has not already been processed.
-        if not self.is_decorated:
-            for dec in reversed(decorators):
-                debug.dbg('decorator: %s %s', dec, f)
-                dec_results = self._evaluator.eval_element(dec.children[1])
-                trailer = dec.children[2:-1]
-                if trailer:
-                    # Create a trailer and evaluate it.
-                    trailer = tree.Node('trailer', trailer)
-                    trailer.parent = dec
-                    dec_results = self._evaluator.eval_trailer(dec_results, trailer)
-
-                if not len(dec_results):
-                    debug.warning('decorator not found: %s on %s', dec, self.base_func)
-                    return self
-                decorator = dec_results.pop()
-                if dec_results:
-                    debug.warning('multiple decorators found %s %s',
-                                  self.base_func, dec_results)
-
-                # Create param array.
-                if isinstance(f, FunctionContext):
-                    old_func = f  # TODO this is just hacky. change.
-                elif f.type == 'funcdef':
-                    old_func = FunctionContext(self._evaluator, f, is_decorated=True)
-                else:
-                    old_func = f
-
-                wrappers = self._evaluator.execute_evaluated(decorator, old_func)
-                if not len(wrappers):
-                    debug.warning('no wrappers found %s', self.base_func)
-                    return self
-                if len(wrappers) > 1:
-                    # TODO resolve issue with multiple wrappers -> multiple types
-                    debug.warning('multiple wrappers found %s %s',
-                                  self.base_func, wrappers)
-                f = list(wrappers)[0]
-                if isinstance(f, (Instance, FunctionContext)):
-                    f.decorates = self
-
-                debug.dbg('decorator end %s', f)
-        return f
 
     def names_dicts(self, search_global):
         if search_global:
@@ -624,10 +566,7 @@ class FunctionContext(use_metaclass(CachedMetaClass, context.TreeContext, Wrappe
         return compiled.get_special_object(self._evaluator, name)
 
     def __repr__(self):
-        dec = ''
-        if self.decorates is not None:
-            dec = " decorates " + repr(self.decorates)
-        return "<e%s of %s%s>" % (type(self).__name__, self.base_func, dec)
+        return "<e%s of %s>" % (type(self).__name__, self.base_func)
 
 
 class LambdaWrapper(FunctionContext):