| //===----------------------------------------------------------------------===// |
| // |
| // 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, class Alloc> |
| // struct uses_allocator<tuple<Types...>, Alloc> : true_type { }; |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <tuple> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| struct A {}; |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::tuple<> T; |
| static_assert((std::is_base_of<std::true_type, |
| std::uses_allocator<T, A>>::value), ""); |
| } |
| { |
| typedef std::tuple<int> T; |
| static_assert((std::is_base_of<std::true_type, |
| std::uses_allocator<T, A>>::value), ""); |
| } |
| { |
| typedef std::tuple<char, int> T; |
| static_assert((std::is_base_of<std::true_type, |
| std::uses_allocator<T, A>>::value), ""); |
| } |
| { |
| typedef std::tuple<double&, char, int> T; |
| static_assert((std::is_base_of<std::true_type, |
| std::uses_allocator<T, A>>::value), ""); |
| } |
| |
| return 0; |
| } |