Remove an occurance of the complicated parser creation.

jedi/evaluate/pep0484.py

@@ -22,8 +22,8 @@ x support for type hint comments for functions, `# type: (int, str) -> int`.
 import itertools
 
 import os
-from jedi.parser import Parser, ParseError, ParserWithRecovery, tree
-from jedi.parser.python import load_grammar
+from jedi.parser import ParseError, tree
+from jedi.parser.python import parse
 from jedi.common import unite
 from jedi.evaluate.cache import memoize_default
 from jedi.evaluate import compiled
@@ -62,9 +62,11 @@ def _fix_forward_reference(context, node):
     if isinstance(evaled_node, compiled.CompiledObject) and \
             isinstance(evaled_node.obj, str):
         try:
-            p = Parser(load_grammar(), _compatibility.unicode(evaled_node.obj),
-                       start_symbol='eval_input')
-            new_node = p.get_parsed_node()
+            new_node = parse(
+                _compatibility.unicode(evaled_node.obj),
+                start_symbol='eval_input',
+                error_recovery=False
+            )
         except ParseError:
             debug.warning('Annotation not parsed: %s' % evaled_node.obj)
             return node
@@ -116,8 +118,7 @@ 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())
-        p = ParserWithRecovery(load_grammar(), code)
-        _typing_module = p.module
+        _typing_module = parse(code)
     return _typing_module
 
 

jedi/parser/__init__.py

@@ -1,2 +1,7 @@
 from jedi.parser.parser import Parser, ParserWithRecovery, ParseError
 from jedi.parser.pgen2.pgen import generate_grammar
+
+
+def parse(grammar, code):
+    raise NotImplementedError
+    Parser(grammar, code)

jedi/parser/python/__init__.py

@@ -41,7 +41,11 @@ def load_grammar(version=None):
             return load_grammar()
 
 
-def parse(code, grammar=None, error_recovery=True):
+def parse(code, grammar=None, error_recovery=True, start_symbol='file_input'):
+    if start_symbol != 'file_input' and error_recovery:
+        raise Exception(
+            'The start_symbol is only allowed when error recovery is disabled.')
+
     added_newline = not code.endswith('\n')
     if added_newline:
         code += '\n'
@@ -50,11 +54,14 @@ def parse(code, grammar=None, error_recovery=True):
         grammar = load_grammar()
 
     tokens = source_tokens(code, use_exact_op_types=True)
+    kwargs = {}
     if error_recovery:
         parser = ParserWithRecovery
     else:
+        kwargs = dict(start_symbol=start_symbol)
         parser = Parser
-    p = parser(grammar, code, tokens=tokens)
+    p = parser(grammar, code, tokens=tokens, **kwargs)
     if added_newline:
         p.remove_last_newline()
+
     return p.get_root_node()