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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// type_traits
// union
#include <type_traits>
#include "test_macros.h"
template <class T>
void test_union_imp()
{
static_assert(!std::is_void<T>::value, "");
#if TEST_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");
static_assert(!std::is_pointer<T>::value, "");
static_assert(!std::is_lvalue_reference<T>::value, "");
static_assert(!std::is_rvalue_reference<T>::value, "");
static_assert(!std::is_member_object_pointer<T>::value, "");
static_assert(!std::is_member_function_pointer<T>::value, "");
static_assert(!std::is_enum<T>::value, "");
static_assert( std::is_union<T>::value, "");
static_assert(!std::is_class<T>::value, "");
static_assert(!std::is_function<T>::value, "");
}
template <class T>
void test_union()
{
test_union_imp<T>();
test_union_imp<const T>();
test_union_imp<volatile T>();
test_union_imp<const volatile T>();
}
union Union
{
int _;
double __;
};
struct incomplete_type;
int main(int, char**)
{
test_union<Union>();
// LWG#2582
static_assert(!std::is_union<incomplete_type>::value, "");
return 0;
}
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