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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: clang-4, clang-5, apple-clang, gcc-5, gcc-6
// type_traits
// has_unique_object_representations
#include <type_traits>
#include "test_macros.h"
template <class T>
void test_has_unique_object_representations()
{
static_assert( std::has_unique_object_representations<T>::value, "");
static_assert( std::has_unique_object_representations<const T>::value, "");
static_assert( std::has_unique_object_representations<volatile T>::value, "");
static_assert( std::has_unique_object_representations<const volatile T>::value, "");
static_assert( std::has_unique_object_representations_v<T>, "");
static_assert( std::has_unique_object_representations_v<const T>, "");
static_assert( std::has_unique_object_representations_v<volatile T>, "");
static_assert( std::has_unique_object_representations_v<const volatile T>, "");
}
template <class T>
void test_has_not_has_unique_object_representations()
{
static_assert(!std::has_unique_object_representations<T>::value, "");
static_assert(!std::has_unique_object_representations<const T>::value, "");
static_assert(!std::has_unique_object_representations<volatile T>::value, "");
static_assert(!std::has_unique_object_representations<const volatile T>::value, "");
static_assert(!std::has_unique_object_representations_v<T>, "");
static_assert(!std::has_unique_object_representations_v<const T>, "");
static_assert(!std::has_unique_object_representations_v<volatile T>, "");
static_assert(!std::has_unique_object_representations_v<const volatile T>, "");
}
class Empty
{
};
class NotEmpty
{
virtual ~NotEmpty();
};
union EmptyUnion {};
struct NonEmptyUnion {int x; unsigned y;};
struct bit_zero
{
int : 0;
};
class Abstract
{
virtual ~Abstract() = 0;
};
struct A
{
~A();
unsigned foo;
};
struct B
{
char bar;
int foo;
};
int main(int, char**)
{
test_has_not_has_unique_object_representations<void>();
test_has_not_has_unique_object_representations<Empty>();
test_has_not_has_unique_object_representations<EmptyUnion>();
test_has_not_has_unique_object_representations<NotEmpty>();
test_has_not_has_unique_object_representations<bit_zero>();
test_has_not_has_unique_object_representations<Abstract>();
test_has_not_has_unique_object_representations<B>();
// I would expect all three of these to have unique representations.
// I would also expect that there are systems where they do not.
// test_has_not_has_unique_object_representations<int&>();
// test_has_not_has_unique_object_representations<int *>();
// test_has_not_has_unique_object_representations<double>();
test_has_unique_object_representations<unsigned>();
test_has_unique_object_representations<NonEmptyUnion>();
test_has_unique_object_representations<char[3]>();
test_has_unique_object_representations<char[]>();
return 0;
}
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