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 // <array> 10 11 // template <size_t I, class T, size_t N> const T&& get(const array<T, N>&& a); 12 13 // UNSUPPORTED: c++98, c++03 14 15 #include <array> 16 #include <memory> 17 #include <type_traits> 18 #include <utility> 19 #include <cassert> 20 21 #include "test_macros.h" 22 23 // std::array is explicitly allowed to be initialized with A a = { init-list };. 24 // Disable the missing braces warning for this reason. 25 #include "disable_missing_braces_warning.h" 26 27 int main() 28 { 29 30 { 31 typedef std::unique_ptr<double> T; 32 typedef std::array<T, 1> C; 33 const C c = {std::unique_ptr<double>(new double(3.5))}; 34 static_assert(std::is_same<const T&&, decltype(std::get<0>(std::move(c)))>::value, ""); 35 static_assert(noexcept(std::get<0>(std::move(c))), ""); 36 const T&& t = std::get<0>(std::move(c)); 37 assert(*t == 3.5); 38 } 39 40 #if TEST_STD_VER > 11 41 { 42 typedef double T; 43 typedef std::array<T, 3> C; 44 constexpr const C c = {1, 2, 3.5}; 45 static_assert(std::get<0>(std::move(c)) == 1, ""); 46 static_assert(std::get<1>(std::move(c)) == 2, ""); 47 static_assert(std::get<2>(std::move(c)) == 3.5, ""); 48 } 49 #endif 50 } 51