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✏️ Mengedit: test_anon.py

import unittest
import test.support
from ctypes import *

class AnonTest(unittest.TestCase):

def test_anon(self):
        class ANON(Union):
            _fields_ = [("a", c_int),
                        ("b", c_int)]

class Y(Structure):
            _fields_ = [("x", c_int),
                        ("_", ANON),
                        ("y", c_int)]
            _anonymous_ = ["_"]

self.assertEqual(Y.a.offset, sizeof(c_int))
        self.assertEqual(Y.b.offset, sizeof(c_int))

self.assertEqual(ANON.a.offset, 0)
        self.assertEqual(ANON.b.offset, 0)

def test_anon_nonseq(self):
        # TypeError: _anonymous_ must be a sequence
        self.assertRaises(TypeError,
                              lambda: type(Structure)("Name",
                                                      (Structure,),
                                                      {"_fields_": [], "_anonymous_": 42}))

def test_anon_nonmember(self):
        # AttributeError: type object 'Name' has no attribute 'x'
        self.assertRaises(AttributeError,
                              lambda: type(Structure)("Name",
                                                      (Structure,),
                                                      {"_fields_": [],
                                                       "_anonymous_": ["x"]}))

@test.support.cpython_only
    def test_issue31490(self):
        # There shouldn't be an assertion failure in case the class has an
        # attribute whose name is specified in _anonymous_ but not in _fields_.

# AttributeError: 'x' is specified in _anonymous_ but not in _fields_
        with self.assertRaises(AttributeError):
            class Name(Structure):
                _fields_ = []
                _anonymous_ = ["x"]
                x = 42

def test_nested(self):
        class ANON_S(Structure):
            _fields_ = [("a", c_int)]

class ANON_U(Union):
            _fields_ = [("_", ANON_S),
                        ("b", c_int)]
            _anonymous_ = ["_"]

class Y(Structure):
            _fields_ = [("x", c_int),
                        ("_", ANON_U),
                        ("y", c_int)]
            _anonymous_ = ["_"]

self.assertEqual(Y.x.offset, 0)
        self.assertEqual(Y.a.offset, sizeof(c_int))
        self.assertEqual(Y.b.offset, sizeof(c_int))
        self.assertEqual(Y._.offset, sizeof(c_int))
        self.assertEqual(Y.y.offset, sizeof(c_int) * 2)

if __name__ == "__main__":
    unittest.main()

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💻 __init__.py	399 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 __main__.py	68 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_anon.py	2.5 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_array_in_pointer.py	1.7 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_arrays.py	7.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_as_parameter.py	6.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_bitfields.py	10 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_buffers.py	2.5 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_bytes.py	1.9 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_byteswap.py	11.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_callbacks.py	10.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_cast.py	3.6 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_cfuncs.py	7.5 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_checkretval.py	968 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_delattr.py	533 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_errno.py	2.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_find.py	4.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_frombuffer.py	5.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_funcptr.py	3.9 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_functions.py	12.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_incomplete.py	1023 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_init.py	1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_internals.py	2.6 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_keeprefs.py	4 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_libc.py	1005 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_loading.py	6.9 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_macholib.py	2.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_memfunctions.py	3.2 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_numbers.py	9.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_objects.py	1.6 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_parameters.py	9.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_pep3118.py	8.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_pickling.py	2.2 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_pointers.py	7.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_prototypes.py	6.7 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_python_api.py	2.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_random_things.py	2.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_refcounts.py	2.5 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_repr.py	842 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_returnfuncptrs.py	2.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_simplesubclasses.py	1.3 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_sizes.py	804 B	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_slicing.py	5.9 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_stringptr.py	2.5 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_strings.py	7.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_struct_fields.py	2.4 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_structures.py	26.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_unaligned_structures.py	1.1 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_unicode.py	1.7 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_values.py	3.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_varsize_struct.py	1.8 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_win32.py	4.9 KB	2025-04-27 18:12	0755	✏️ Edit ⬇
💻 test_wintypes.py	1.4 KB	2025-04-27 18:12	0755	✏️ Edit ⬇

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