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 // const typename tuple_element<I, tuple<Types...> >::type&&
15 // get(const tuple<Types...>&& t);
16
17 // UNSUPPORTED: c++03
18
19 #include <tuple>
20
cref(T const &)21 template <class T> void cref(T const&) {}
22 template <class T> void cref(T const&&) = delete;
23
tup4()24 std::tuple<int> const tup4() { return std::make_tuple(4); }
25
f()26 void f() {
27 // LWG2485: tuple should not open a hole in the type system, get() should
28 // imitate [expr.ref]'s rules for accessing data members
29 {
30 cref(std::get<0>(tup4())); // expected-error {{call to deleted function 'cref'}}
31 }
32 }
33