A tiny refactor

Author: ilevkivskyi

mypy/cache.py

@@ -391,15 +391,13 @@ def write_str_opt_list(data: WriteBuffer, value: list[str | None]) -> None:
         write_str_opt(data, item)
 
 
-JsonValue: _TypeAlias = None | int | str | bool | list["JsonValue"] | dict[str, "JsonValue"]
+Value: _TypeAlias = None | int | str | bool
+JsonValue: _TypeAlias = Value | list["JsonValue"] | dict[str, "JsonValue"]
+
+# Currently tuples are used by mypyc plugin. They will be normalized to
+# JSON lists after a roundtrip.
 JsonValueEx: _TypeAlias = (
-    None
-    | int
-    | str
-    | bool
-    | list["JsonValueEx"]
-    | dict[str, "JsonValueEx"]
-    | tuple["JsonValueEx", ...]
+    Value | list["JsonValueEx"] | dict[str, "JsonValueEx"] | tuple["JsonValueEx", ...]
 )
 
 
@@ -424,8 +422,6 @@ def read_json_value(data: ReadBuffer) -> JsonValue:
     assert False, f"Invalid JSON tag: {tag}"
 
 
-# Currently tuples are used by mypyc plugin. They will be normalized to
-# JSON lists after a roundtrip.
 def write_json_value(data: WriteBuffer, value: JsonValueEx) -> None:
     if value is None:
         write_tag(data, LITERAL_NONE)