Add a latest grammar to the evaluator and use it to avoid importing from parso import parse.

jedi/evaluate/pep0484.py

@@ -20,10 +20,12 @@ x support for type hint comments for functions, `# type: (int, str) -> int`.
 """
 
 import itertools
-
 import os
+import re
+
 from parso import ParserSyntaxError
-from parso.python import parse, tree
+from parso.python import tree
+
 from jedi.common import unite
 from jedi.evaluate.cache import memoize_default
 from jedi.evaluate import compiled
@@ -31,7 +33,6 @@ from jedi.evaluate.context import LazyTreeContext
 from jedi import debug
 from jedi import _compatibility
 from jedi import parser_utils
-import re
 
 
 def _evaluate_for_annotation(context, annotation, index=None):
@@ -63,7 +64,7 @@ def _fix_forward_reference(context, node):
     if isinstance(evaled_node, compiled.CompiledObject) and \
             isinstance(evaled_node.obj, str):
         try:
-            new_node = parse(
+            new_node = context.evaluator.grammar.parse(
                 _compatibility.unicode(evaled_node.obj),
                 start_symbol='eval_input',
                 error_recovery=False
@@ -110,7 +111,7 @@ def infer_return_types(function_context):
 _typing_module = None
 
 
-def _get_typing_replacement_module():
+def _get_typing_replacement_module(grammar):
     """
     The idea is to return our jedi replacement for the PEP-0484 typing module
     as discussed at https://github.com/davidhalter/jedi/issues/663
@@ -121,7 +122,7 @@ def _get_typing_replacement_module():
             os.path.abspath(os.path.join(__file__, "../jedi_typing.py"))
         with open(typing_path) as f:
             code = _compatibility.unicode(f.read())
-        _typing_module = parse(code)
+        _typing_module = grammar.parse(code)
     return _typing_module
 
 
@@ -155,7 +156,7 @@ def py__getitem__(context, typ, node):
     from jedi.evaluate.representation import ModuleContext
     typing = ModuleContext(
         context.evaluator,
-        module_node=_get_typing_replacement_module(),
+        module_node=_get_typing_replacement_module(context.evaluator.latest_grammar),
         path=None
     )
     factories = typing.py__getattribute__("factory")