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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// type_traits
// is_default_constructible
#include <type_traits>
#include "test_macros.h"
template <class T>
void test_is_default_constructible()
{
static_assert( std::is_default_constructible<T>::value, "");
static_assert( std::is_default_constructible<const T>::value, "");
static_assert( std::is_default_constructible<volatile T>::value, "");
static_assert( std::is_default_constructible<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert( std::is_default_constructible_v<T>, "");
static_assert( std::is_default_constructible_v<const T>, "");
static_assert( std::is_default_constructible_v<volatile T>, "");
static_assert( std::is_default_constructible_v<const volatile T>, "");
#endif
}
template <class T>
void test_is_not_default_constructible()
{
static_assert(!std::is_default_constructible<T>::value, "");
static_assert(!std::is_default_constructible<const T>::value, "");
static_assert(!std::is_default_constructible<volatile T>::value, "");
static_assert(!std::is_default_constructible<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert(!std::is_default_constructible_v<T>, "");
static_assert(!std::is_default_constructible_v<const T>, "");
static_assert(!std::is_default_constructible_v<volatile T>, "");
static_assert(!std::is_default_constructible_v<const volatile T>, "");
#endif
}
class Empty
{
};
class NoDefaultConstructor
{
NoDefaultConstructor(int) {}
};
class NotEmpty
{
public:
virtual ~NotEmpty();
};
union Union {};
struct bit_zero
{
int : 0;
};
class Abstract
{
public:
virtual ~Abstract() = 0;
};
struct A
{
A();
};
class B
{
B();
};
int main()
{
test_is_default_constructible<A>();
test_is_default_constructible<Union>();
test_is_default_constructible<Empty>();
test_is_default_constructible<int>();
test_is_default_constructible<double>();
test_is_default_constructible<int*>();
test_is_default_constructible<const int*>();
test_is_default_constructible<char[3]>();
test_is_default_constructible<char[5][3]>();
test_is_default_constructible<NotEmpty>();
test_is_default_constructible<bit_zero>();
test_is_not_default_constructible<void>();
test_is_not_default_constructible<int&>();
test_is_not_default_constructible<char[]>();
test_is_not_default_constructible<char[][3]>();
test_is_not_default_constructible<Abstract>();
test_is_not_default_constructible<NoDefaultConstructor>();
#if TEST_STD_VER >= 11
test_is_not_default_constructible<B>();
test_is_not_default_constructible<int&&>();
// TODO: Remove this workaround once Clang <= 3.7 are no longer used regularly.
// In those compiler versions the __is_constructible builtin gives the wrong
// results for abominable function types.
#if (defined(TEST_APPLE_CLANG_VER) && TEST_APPLE_CLANG_VER < 703) \
|| (defined(TEST_CLANG_VER) && TEST_CLANG_VER < 308)
#define WORKAROUND_CLANG_BUG
#endif
#if !defined(WORKAROUND_CLANG_BUG)
test_is_not_default_constructible<void()>();
test_is_not_default_constructible<void() const> ();
test_is_not_default_constructible<void() volatile> ();
test_is_not_default_constructible<void() &> ();
test_is_not_default_constructible<void() &&> ();
#endif
#endif
}
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