Literal ellipsis as first class citizen

baron/grammator.py

@@ -642,6 +642,15 @@ def generate_parse(print_function):
             "value": string_chain
         }
+    @pg.production("atom : DOT DOT DOT")
+    def ellipsis(pack):
+        (first_, middle_, last_) = pack
+        return {
+            "type": "name",
+            "formatting": first_.hidden_tokens_after,
+            "value": "...",
+        }
+
     @pg.production("strings : string strings")
     def strings_string_strings(pack):
         (string_, strings_) = pack

tests/test_grammator.py

@@ -380,6 +380,17 @@ def test_file_input_simple_stmt_one_item_semicolon_space():
     ])
+def test_ellipsis():
+    "..."
+    parse_simple([('DOT', '.'), ('DOT', '.'),('DOT', '.')], [
+        {
+            "type": "name",
+            "formatting": [],
+            "value": "...",
+        }
+    ])
+
+
 def test_funcdef_stmt_indent():
     """
     def a () :