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b857e811b3
Similarly to https://reviews.llvm.org/rL350972, this revision changes std::tuple_element from class to struct. Fixes PR41331. Thanks to Jan Wilken Dörrie for the patch. Differential Revision: https://reviews.llvm.org/D60069 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@357411 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
980 B
C++
35 lines
980 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <tuple>
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// template <class... Types> class tuple;
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// template <size_t I, class... Types>
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// struct tuple_element<I, tuple<Types...> >
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// {
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// typedef Ti type;
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// };
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// UNSUPPORTED: c++98, c++03
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#include <tuple>
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#include <type_traits>
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int main(int, char**)
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{
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using T = std::tuple<int, long, void*>;
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using E1 = typename std::tuple_element<1, T &>::type; // expected-error{{undefined template}}
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using E2 = typename std::tuple_element<3, T>::type;
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using E3 = typename std::tuple_element<4, T const>::type;
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// expected-error@__tuple:* 2 {{static_assert failed}}
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return 0;
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}
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