Allow renaming relative import rule

%import .local.foo -> bar

lark/load_grammar.py

@@ -139,7 +139,7 @@ RULES = {
     'declare': ['_DECLARE _declare_args _NL'],
     'import': ['_IMPORT _import_path _NL',
                '_IMPORT _import_path _LPAR name_list _RPAR _NL',
-               '_IMPORT _import_path _TO TERMINAL _NL'],
+               '_IMPORT _import_path _TO name _NL'],
 
     '_import_path': ['import_lib', 'import_rel'],
     'import_lib': ['_import_args'],

tests/test_parser.py

@@ -1056,6 +1056,31 @@ def _make_parser_test(LEXER, PARSER):
                 'y'])
 
 
+        def test_relative_rule_import_subrule_no_conflict(self):
+            l = _Lark_open(
+                'test_relative_rule_import_subrule_no_conflict.lark',
+                rel_to=__file__)
+            x = l.parse('xaby')
+            self.assertEqual(x.children, [Tree('expr', [
+                'x',
+                Tree('startab', [
+                    Tree('grammars__ab__expr', ['a', 'b']),
+                ]),
+                'y'])])
+            self.assertRaises((ParseError, UnexpectedInput),
+                              l.parse, 'xaxabyby')
+
+
+        def test_relative_rule_import_rename(self):
+            l = _Lark_open('test_relative_rule_import_rename.lark',
+                           rel_to=__file__)
+            x = l.parse('xaabby')
+            self.assertEqual(x.children, [
+                'x',
+                Tree('ab', ['a', Tree('ab', ['a', 'b']), 'b']),
+                'y'])
+
+
         def test_multi_import(self):
             grammar = """
             start: NUMBER WORD

tests/test_relative_rule_import_rename.lark

@@ -0,0 +1,7 @@
+start: X ab Y
+
+X: "x"
+Y: "y"
+
+%import .grammars.ab.expr -> ab
+

tests/test_relative_rule_import_subrule_no_conflict.lark

@@ -0,0 +1,9 @@
+start: expr
+
+expr: X startab Y
+
+X: "x"
+Y: "y"
+
+%import .grammars.ab.startab
+