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-has-no-incomplete-ranges 11 12 // constexpr V base() const& requires copy_constructible<V> { return base_; } 13 // constexpr V base() && { return std::move(base_); } 14 15 #include <ranges> 16 17 #include "test_macros.h" 18 #include "types.h" 19 test()20constexpr bool test() { 21 std::ranges::drop_view<MoveOnlyView> dropView1; 22 auto base1 = std::move(dropView1).base(); 23 assert(std::ranges::begin(base1) == globalBuff); 24 25 // Note: we should *not* drop two elements here. 26 std::ranges::drop_view<MoveOnlyView> dropView2(MoveOnlyView{4}, 2); 27 auto base2 = std::move(dropView2).base(); 28 assert(std::ranges::begin(base2) == globalBuff + 4); 29 30 std::ranges::drop_view<CopyableView> dropView3; 31 auto base3 = dropView3.base(); 32 assert(std::ranges::begin(base3) == globalBuff); 33 auto base4 = std::move(dropView3).base(); 34 assert(std::ranges::begin(base4) == globalBuff); 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