| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <tuple> |
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| 10 | |
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| 11 | // template <class... Types> class tuple; |
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| 12 | |
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| 13 | // template <size_t I, class... Types> |
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| 14 | // const typename tuple_element<I, tuple<Types...> >::type&& |
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| 15 | // get(const tuple<Types...>&& t); |
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| 16 | |
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| 17 | // UNSUPPORTED: c++03 |
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| 18 | |
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| 19 | #include <tuple> |
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| 20 | |
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| 21 | template <class T> void cref(T const&) {} |
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| 22 | template <class T> void cref(T const&&) = delete; |
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| 23 | |
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| 24 | std::tuple<int> const tup4() { return std::make_tuple(args: 4); } |
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| 25 | |
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| 26 | void f() { |
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| 27 | // LWG2485: tuple should not open a hole in the type system, get() should |
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| 28 | // imitate [expr.ref]'s rules for accessing data members |
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| 29 | { |
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| 30 | cref(std::get<0>(t: tup4())); // expected-error {{call to deleted function 'cref'}} |
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| 31 | } |
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| 32 | } |
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| 33 | |
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