cxx/test/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_assignable.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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_trivially_copy_assignable

#include <type_traits>

template <class T, bool Result>
void test_has_trivial_assign()
{
    static_assert(std::is_trivially_copy_assignable<T>::value == Result, "");
}

class Empty
{
};

class NotEmpty
{
    virtual ~NotEmpty();
};

union Union {};

struct bit_zero
{
    int :  0;
};

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

struct A
{
    A& operator=(const A&);
};

int main()
{
    test_has_trivial_assign<void, false>();
    test_has_trivial_assign<A, false>();
    test_has_trivial_assign<int&, true>();
    test_has_trivial_assign<NotEmpty, false>();
    test_has_trivial_assign<Abstract, false>();
    test_has_trivial_assign<const Empty, false>();

    test_has_trivial_assign<Union, true>();
    test_has_trivial_assign<Empty, true>();
    test_has_trivial_assign<int, true>();
    test_has_trivial_assign<double, true>();
    test_has_trivial_assign<int*, true>();
    test_has_trivial_assign<const int*, true>();
    test_has_trivial_assign<bit_zero, true>();
}