85 lines
1.7 KiB
C++
85 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// type_traits
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// is_assignable
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#include <type_traits>
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#include "test_macros.h"
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struct A
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{
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};
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struct B
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{
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void operator=(A);
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};
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template <class T, class U>
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void test_is_assignable()
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{
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static_assert(( std::is_assignable<T, U>::value), "");
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#if TEST_STD_VER > 14
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static_assert( std::is_assignable_v<T, U>, "");
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#endif
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}
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template <class T, class U>
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void test_is_not_assignable()
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{
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static_assert((!std::is_assignable<T, U>::value), "");
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#if TEST_STD_VER > 14
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static_assert( !std::is_assignable_v<T, U>, "");
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#endif
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}
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struct D;
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#if TEST_STD_VER >= 11
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struct C
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{
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template <class U>
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D operator,(U&&);
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};
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struct E
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{
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C operator=(int);
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};
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#endif
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template <typename T>
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struct X { T t; };
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int main(int, char**)
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{
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test_is_assignable<int&, int&> ();
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test_is_assignable<int&, int> ();
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test_is_assignable<int&, double> ();
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test_is_assignable<B, A> ();
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test_is_assignable<void*&, void*> ();
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#if TEST_STD_VER >= 11
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test_is_assignable<E, int> ();
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test_is_not_assignable<int, int&> ();
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test_is_not_assignable<int, int> ();
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#endif
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test_is_not_assignable<A, B> ();
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test_is_not_assignable<void, const void> ();
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test_is_not_assignable<const void, const void> ();
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test_is_not_assignable<int(), int> ();
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// pointer to incomplete template type
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test_is_assignable<X<D>*&, X<D>*> ();
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return 0;
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}
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