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 // UNSUPPORTED: c++03, c++11, c++14, c++17 10 // UNSUPPORTED: libcpp-no-concepts 11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges 12 13 // constexpr explicit single_view(const T& t); 14 // constexpr explicit single_view(T&& t); 15 16 #include <ranges> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 struct Empty {}; 22 struct BigType { char buffer[64] = {10}; }; 23 test()24constexpr bool test() { 25 { 26 BigType bt; 27 std::ranges::single_view<BigType> sv(bt); 28 assert(sv.data()->buffer[0] == 10); 29 assert(sv.size() == 1); 30 } 31 { 32 const BigType bt; 33 const std::ranges::single_view<BigType> sv(bt); 34 assert(sv.data()->buffer[0] == 10); 35 assert(sv.size() == 1); 36 } 37 38 { 39 BigType bt; 40 std::ranges::single_view<BigType> sv(std::move(bt)); 41 assert(sv.data()->buffer[0] == 10); 42 assert(sv.size() == 1); 43 } 44 { 45 const BigType bt; 46 const std::ranges::single_view<BigType> sv(std::move(bt)); 47 assert(sv.data()->buffer[0] == 10); 48 assert(sv.size() == 1); 49 } 50 51 return true; 52 } 53 main(int,char **)54int main(int, char**) { 55 test(); 56 static_assert(test()); 57 58 return 0; 59 } 60