| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 10 | |
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| 11 | // template <class _Tp, template <class...> class _Template> |
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| 12 | // inline constexpr bool __is_specialization_v = true if and only if _Tp is a specialization of _Template |
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| 13 | // |
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| 14 | // Note instantiation for certain type combinations are ill-formed. These are |
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| 15 | // tested in is_specialization.verify.cpp. |
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| 16 | |
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| 17 | #include <type_traits> |
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| 18 | |
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| 19 | #include <array> |
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| 20 | #include <concepts> |
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| 21 | #include <string_view> |
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| 22 | #include <tuple> |
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| 23 | #include <utility> |
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| 24 | |
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| 25 | #include "test_macros.h" |
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| 26 | |
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| 27 | // Simple types |
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| 28 | static_assert(std::__is_specialization_v<std::pair<int, int>, std::pair>); |
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| 29 | static_assert(!std::__is_specialization_v<std::pair<int, int>, std::tuple>); |
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| 30 | static_assert(!std::__is_specialization_v<std::pair<int, int>, std::basic_string_view>); |
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| 31 | |
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| 32 | static_assert(std::__is_specialization_v<std::tuple<int>, std::tuple>); |
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| 33 | static_assert(std::__is_specialization_v<std::tuple<int, float>, std::tuple>); |
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| 34 | static_assert(std::__is_specialization_v<std::tuple<int, float, void*>, std::tuple>); |
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| 35 | |
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| 36 | static_assert(std::__is_specialization_v<std::string_view, std::basic_string_view>); |
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| 37 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 38 | static_assert(std::__is_specialization_v<std::wstring_view, std::basic_string_view>); |
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| 39 | #endif |
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| 40 | |
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| 41 | // Nested types |
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| 42 | static_assert(std::__is_specialization_v<std::pair<std::tuple<int>, int>, std::pair>); |
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| 43 | static_assert(!std::__is_specialization_v<std::pair<std::tuple<int>, int>, std::tuple>); |
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| 44 | |
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| 45 | // cvref _Tp is not a specialization. |
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| 46 | static_assert(!std::__is_specialization_v<const std::pair<int, int>, std::pair>); |
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| 47 | static_assert(!std::__is_specialization_v<volatile std::pair<int, int>, std::pair>); |
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| 48 | static_assert(!std::__is_specialization_v<const volatile std::pair<int, int>, std::pair>); |
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| 49 | |
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| 50 | static_assert(!std::__is_specialization_v<std::pair<int, int>&, std::pair>); |
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| 51 | static_assert(!std::__is_specialization_v<const std::pair<int, int>&, std::pair>); |
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| 52 | static_assert(!std::__is_specialization_v<volatile std::pair<int, int>&, std::pair>); |
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| 53 | static_assert(!std::__is_specialization_v<const volatile std::pair<int, int>&, std::pair>); |
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| 54 | |
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| 55 | static_assert(!std::__is_specialization_v<std::pair<int, int>&&, std::pair>); |
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| 56 | static_assert(!std::__is_specialization_v<const std::pair<int, int>&&, std::pair>); |
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| 57 | static_assert(!std::__is_specialization_v<volatile std::pair<int, int>&&, std::pair>); |
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| 58 | static_assert(!std::__is_specialization_v<const volatile std::pair<int, int>&&, std::pair>); |
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| 59 | |
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