🐛 Handle python 3.12+ TypeAliasType in Option parsing

Author: Paillat-dev

discord/commands/options.py

@@ -28,7 +28,15 @@
 import logging
 import types
 from enum import Enum
-from typing import TYPE_CHECKING, Literal, Optional, Type, Union, get_args
+from typing import (
+    TYPE_CHECKING,
+    Literal,
+    Optional,
+    Type,
+    TypeAliasType,
+    Union,
+    get_args,
+)
 
 from ..abc import GuildChannel, Mentionable
 from ..channel import (
@@ -197,6 +205,7 @@ def __init__(
         if self.name is not None:
             self.name = str(self.name)
         self._parameter_name = self.name  # default
+        input_type = self._parse_type_alias(input_type)
         input_type = self._strip_none_type(input_type)
         self._raw_type: InputType | tuple = input_type
 
@@ -367,6 +376,12 @@ def __init__(
         if input_type is None:
             raise TypeError("input_type cannot be NoneType.")
 
+    @staticmethod
+    def _parse_type_alias(input_type: InputType) -> InputType:
+        if isinstance(input_type, TypeAliasType):
+            return input_type.__value__
+        return input_type
+
     @staticmethod
     def _strip_none_type(input_type):
         if isinstance(input_type, SlashCommandOptionType):