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: gcc-11 12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges 13 14 // Tests that <value_> is a <copyable-box>. 15 16 #include <ranges> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 struct NotAssignable { 22 NotAssignable() = default; 23 NotAssignable(const NotAssignable&) = default; 24 NotAssignable(NotAssignable&&) = default; 25 26 NotAssignable& operator=(const NotAssignable&) = delete; 27 NotAssignable& operator=(NotAssignable&&) = delete; 28 }; 29 test()30constexpr bool test() { 31 const std::ranges::single_view<NotAssignable> a; 32 std::ranges::single_view<NotAssignable> b; 33 b = a; 34 b = std::move(a); 35 36 return true; 37 } 38 main(int,char **)39int main(int, char**) { 40 test(); 41 static_assert(test()); 42 43 return 0; 44 } 45