| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // template <class... Types> |
| // struct tuple_size<tuple<Types...>> |
| // : public integral_constant<size_t, sizeof...(Types)> { }; |
| |
| // XFAIL: gcc-4.9 |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <tuple> |
| #include <array> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| template <class T, size_t Size = sizeof(std::tuple_size<T>)> |
| constexpr bool is_complete(int) { static_assert(Size > 0, ""); return true; } |
| template <class> constexpr bool is_complete(long) { return false; } |
| template <class T> constexpr bool is_complete() { return is_complete<T>(0); } |
| |
| struct Dummy1 {}; |
| struct Dummy2 {}; |
| |
| namespace std { |
| template <> struct tuple_size<Dummy1> : public integral_constant<size_t, 0> {}; |
| } |
| |
| template <class T> |
| void test_complete() { |
| static_assert(is_complete<T>(), ""); |
| static_assert(is_complete<const T>(), ""); |
| static_assert(is_complete<volatile T>(), ""); |
| static_assert(is_complete<const volatile T>(), ""); |
| } |
| |
| template <class T> |
| void test_incomplete() { |
| static_assert(!is_complete<T>(), ""); |
| static_assert(!is_complete<const T>(), ""); |
| static_assert(!is_complete<volatile T>(), ""); |
| static_assert(!is_complete<const volatile T>(), ""); |
| } |
| |
| |
| int main(int, char**) |
| { |
| test_complete<std::tuple<> >(); |
| test_complete<std::tuple<int&> >(); |
| test_complete<std::tuple<int&&, int&, void*>>(); |
| test_complete<std::pair<int, long> >(); |
| test_complete<std::array<int, 5> >(); |
| test_complete<Dummy1>(); |
| |
| test_incomplete<void>(); |
| test_incomplete<int>(); |
| test_incomplete<std::tuple<int>&>(); |
| test_incomplete<Dummy2>(); |
| |
| return 0; |
| } |