39 lines
1.0 KiB
C++
39 lines
1.0 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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// UNSUPPORTED: c++03, c++11
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// <experimental/type_traits>
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#include <experimental/type_traits>
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#include <string>
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#include "test_macros.h"
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namespace ex = std::experimental;
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template <typename T>
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using copy_assign_t = decltype(std::declval<T&>() = std::declval<T const &>());
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struct not_assignable {
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not_assignable & operator=(const not_assignable&) = delete;
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};
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template <typename T, bool b>
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void test() {
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static_assert( b == ex::is_detected <copy_assign_t, T>::value, "" );
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static_assert( b == ex::is_detected_v<copy_assign_t, T>, "" );
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}
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int main(int, char**) {
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test<int, true>();
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test<std::string, true>();
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test<not_assignable, false>();
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return 0;
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}
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