//===----------------------------------------------------------------------===//
//
// 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++98, c++03, c++11, c++14, c++17

// type_traits

// is_unbounded_array<T>
// T is an array type of unknown bound ([dcl.array])

#include <type_traits>

template <class T, bool B>
void test_array_imp()
{
    static_assert( B == std::is_unbounded_array<T>::value, "" );
    static_assert( B == std::is_unbounded_array_v<T>, "" );
}

template <class T, bool B>
void test_array()
{
    test_array_imp<T, B>();
    test_array_imp<const T, B>();
    test_array_imp<volatile T, B>();
    test_array_imp<const volatile T, B>();
}

typedef char array[3];
typedef char incomplete_array[];

class incomplete_type;

class Empty {};
union Union {};

class Abstract
{
    virtual ~Abstract() = 0;
};

enum Enum {zero, one};
typedef void (*FunctionPtr)();

int main(int, char**)
{
//  Non-array types
    test_array<void,           false>();
    test_array<std::nullptr_t, false>();
    test_array<int,            false>();
    test_array<double,         false>();
    test_array<void *,         false>();
    test_array<int &,          false>();
    test_array<int &&,         false>();
    test_array<Empty,          false>();
    test_array<Union,          false>();
    test_array<Abstract,       false>();
    test_array<Enum,           false>();
    test_array<FunctionPtr,    false>();
    
//  Array types
    test_array<array,             false>();
    test_array<incomplete_array,  true>();
    test_array<incomplete_type[], true>();

  return 0;
}