`enum.Enum` should not be callable

[A5rocks]

Bug Report

enum.Enum shouldn't be callable

To Reproduce

import enum

enum.Enum()

Expected Behavior

Error about calling enum.Enum. Here's runtime output:

Traceback (most recent call last):
  File "/Users/a5rocks/Documents/mypy/repro.py", line 3, in <module>
    enum.Enum()
    ~~~~~~~~~^^
TypeError: EnumType.__call__() missing 1 required positional argument: 'value'

Actual Behavior

No errors.

Your Environment

• Mypy version used: 1.19.0+dev.35e843cc38cedc1bdf87d9937c06d51189ad0e45
• Mypy command-line flags: --cache-dir /dev/null
• Mypy configuration options from mypy.ini (and other config files): N/A
• Python version used: 3.13.7

[A5rocks]

IMO, looking at behavior, I think we should just disallow any calling of the constructor (whereas typeshed would have us simply require a param). There's no valid value at runtime I believe.

[TeamSpen210]

You can call it with a bunch of names/values to create a new enum class, not sure if Mypy allows that. So I guess it should either error about an invalid enum creation, or treat it sorta like an abstract class? Should also apply to things like Flag or IntEnum, or anything else subclassed with no members.

[A5rocks]

Yeah I found out that mypy actually supports that form! But it only checks for it in assignments, so I just made it check for non-assignments too...