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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_assignable
#include <type_traits>
#include "test_macros.h"
struct A
{
};
struct B
{
void operator=(A);
};
template <class T, class U>
void test_is_assignable()
{
static_assert(( std::is_assignable<T, U>::value), "");
#if TEST_STD_VER > 14
static_assert( std::is_assignable_v<T, U>, "");
#endif
}
template <class T, class U>
void test_is_not_assignable()
{
static_assert((!std::is_assignable<T, U>::value), "");
#if TEST_STD_VER > 14
static_assert( !std::is_assignable_v<T, U>, "");
#endif
}
struct D;
#if TEST_STD_VER >= 11
struct C
{
template <class U>
D operator,(U&&);
};
struct E
{
C operator=(int);
};
#endif
template <typename T>
struct X { T t; };
struct Incomplete;
int main()
{
test_is_assignable<int&, int&> ();
test_is_assignable<int&, int> ();
test_is_assignable<int&, double> ();
test_is_assignable<B, A> ();
test_is_assignable<void*&, void*> ();
#if TEST_STD_VER >= 11
test_is_assignable<E, int> ();
test_is_not_assignable<int, int&> ();
test_is_not_assignable<int, int> ();
#endif
test_is_not_assignable<A, B> ();
test_is_not_assignable<void, const void> ();
test_is_not_assignable<const void, const void> ();
test_is_not_assignable<int(), int> ();
// pointer to incomplete template type
test_is_assignable<X<D>*&, X<D>*> ();
}
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