| // Copyright (C) 2018-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| // |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| // |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-do compile { target c++2a } } |
| |
| #include <type_traits> |
| |
| template<typename T, typename = typename std::type_identity<T>::type> |
| struct test; // undefined |
| |
| template<typename T> |
| struct test<T, T> : std::true_type { }; |
| |
| enum test_enum { }; |
| struct test_class { }; |
| struct incomplete_class; |
| |
| void test01() |
| { |
| static_assert(test<float>::value, ""); |
| static_assert(test<const unsigned int>::value, ""); |
| static_assert(test<const unsigned int>::value, ""); |
| static_assert(test<volatile unsigned int>::value, ""); |
| static_assert(test<const volatile unsigned int>::value, ""); |
| static_assert(test<const unsigned char>::value, ""); |
| static_assert(test<volatile wchar_t>::value, "" ); |
| |
| // Pointers |
| static_assert(test<void*>::value, ""); |
| static_assert(test<long*>::value, ""); |
| // References |
| static_assert(test<short&>::value, ""); |
| static_assert(test<char&&>::value, ""); |
| static_assert(test<int*&>::value, ""); |
| // Arrays |
| static_assert(test<int[]>::value, ""); |
| static_assert(test<int[2]>::value, ""); |
| static_assert(test<int[2][3]>::value, ""); |
| static_assert(test<int(*)[2]>::value, ""); |
| static_assert(test<int(&)[2]>::value, ""); |
| |
| static_assert(test<test_enum>::value, ""); |
| static_assert(test<test_class>::value, ""); |
| static_assert(test<incomplete_class>::value, ""); |
| |
| // Functions |
| static_assert(test<void(*)()>::value, ""); |
| static_assert(test<int(*)(int) noexcept>::value, ""); |
| static_assert(test<void(&)()>::value, ""); |
| static_assert(test<long(&)(long) noexcept>::value, ""); |
| static_assert(test<void()>::value, ""); |
| static_assert(test<int(int, int)>::value, ""); |
| static_assert(test<void() noexcept>::value, ""); |
| static_assert(test<int(int, int) noexcept>::value, ""); |
| |
| // Abominable function types |
| static_assert(test<void(int) const>::value, ""); |
| static_assert(test<void(int) const volatile>::value, ""); |
| |
| // Pointers to members |
| static_assert(test<int incomplete_class::*>::value, ""); |
| static_assert(test<void(incomplete_class::*)(int)>::value, ""); |
| static_assert(test<void(incomplete_class::*)(int) noexcept>::value, ""); |
| static_assert(test<void(incomplete_class::*)() const>::value, ""); |
| static_assert(test<void(incomplete_class::*)() &>::value, ""); |
| static_assert(test<void(incomplete_class::*)() &&>::value, ""); |
| static_assert(test<void(incomplete_class::*)() volatile &&>::value, ""); |
| |
| #ifndef __STRICT_ANSI__ |
| // GNU Extensions. |
| #ifdef __SIZEOF_INT128__ |
| static_assert(test<unsigned __int128>::value, ""); |
| static_assert(test<unsigned __int128>::value, ""); |
| #endif |
| #endif |
| } |