1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <tuple> 10 11 // template <class... Types> class tuple; 12 13 // template <size_t I, class... Types> 14 // struct tuple_element<I, tuple<Types...> > 15 // { 16 // typedef Ti type; 17 // }; 18 19 // UNSUPPORTED: c++03 20 21 #include <tuple> 22 23 using T = std::tuple<int, long, void*>; 24 using E1 = typename std::tuple_element<1, T &>::type; // expected-error{{undefined template}} 25 using E2 = typename std::tuple_element<3, T>::type; 26 using E3 = typename std::tuple_element<4, T const>::type; // expected-error@*:* 2 {{static assertion failed}} 27