| //===----------------------------------------------------------------------===// |
| // |
| // 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 <size_t I, class... Types> |
| // typename tuple_element<I, tuple<Types...> >::type const& |
| // get(const tuple<Types...>& t); |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <tuple> |
| #include <string> |
| #include <cassert> |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::tuple<double&, std::string, int> T; |
| double d = 1.5; |
| const T t(d, "high", 5); |
| assert(std::get<0>(t) == 1.5); |
| assert(std::get<1>(t) == "high"); |
| assert(std::get<2>(t) == 5); |
| std::get<0>(t) = 2.5; |
| assert(std::get<0>(t) == 2.5); |
| assert(std::get<1>(t) == "high"); |
| assert(std::get<2>(t) == 5); |
| assert(d == 2.5); |
| |
| std::get<1>(t) = "four"; |
| } |
| |
| return 0; |
| } |