pybind11/tests/test_union.py

# -*- coding: utf-8 -*-
from pybind11_tests import union_ as m


def test_union():
    instance = m.TestUnion()

    instance.as_uint = 10
    assert instance.as_int == 10
ci: GHA basic format & pre-commit (#2309) 2020-07-20 17:35:21 +00:00			`# -- coding: utf-8 --`
Fix assertion failure for unions (#1685) (#1709) In def_readonly and def_readwrite, there is an assertion that the member comes from the class or a base class: static_assert(std::is_base_of<C, type>::value, "..."); However, if C and type are the same type, is_base_of will still only be true if they are the same _non-union_ type. This means we can't define accessors for the members of a union type because of this assertion. Update the assertion to test std::is_same<C, type>::value \|\| std::is_base_of<C, type>::value which will allow union types, or members of base classes. Also add a basic unit test for accessing unions. 2019-06-11 20:25:12 +00:00			`from pybind11_tests import union_ as m`


			`def test_union():`
			`instance = m.TestUnion()`

			`instance.as_uint = 10`
			`assert instance.as_int == 10`
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