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1aa8dd1745
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.
23 lines
603 B
C++
23 lines
603 B
C++
/*
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tests/test_class.cpp -- test py::class_ definitions and basic functionality
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Copyright (c) 2019 Roland Dreier <roland.dreier@gmail.com>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "pybind11_tests.h"
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TEST_SUBMODULE(union_, m) {
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union TestUnion {
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int value_int;
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unsigned value_uint;
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};
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py::class_<TestUnion>(m, "TestUnion")
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.def(py::init<>())
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.def_readonly("as_int", &TestUnion::value_int)
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.def_readwrite("as_uint", &TestUnion::value_uint);
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}
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