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> 13 // constexpr V base() && 14 15 #include <ranges> 16 17 #include "test_macros.h" 18 #include "types.h" 19 20 constexpr bool test() { 21 { 22 std::ranges::transform_view<MoveOnlyView, PlusOne> transformView; 23 MoveOnlyView base = std::move(transformView).base(); 24 ASSERT_SAME_TYPE(MoveOnlyView, decltype(std::move(transformView).base())); 25 assert(std::ranges::begin(base) == globalBuff); 26 } 27 28 { 29 std::ranges::transform_view<CopyableView, PlusOne> transformView; 30 CopyableView base1 = transformView.base(); 31 ASSERT_SAME_TYPE(CopyableView, decltype(transformView.base())); 32 assert(std::ranges::begin(base1) == globalBuff); 33 34 CopyableView base2 = std::move(transformView).base(); 35 ASSERT_SAME_TYPE(CopyableView, decltype(std::move(transformView).base())); 36 assert(std::ranges::begin(base2) == globalBuff); 37 } 38 39 { 40 const std::ranges::transform_view<CopyableView, PlusOne> transformView; 41 const CopyableView base1 = transformView.base(); 42 ASSERT_SAME_TYPE(CopyableView, decltype(transformView.base())); 43 assert(std::ranges::begin(base1) == globalBuff); 44 45 const CopyableView base2 = std::move(transformView).base(); 46 ASSERT_SAME_TYPE(CopyableView, decltype(std::move(transformView).base())); 47 assert(std::ranges::begin(base2) == globalBuff); 48 } 49 50 return true; 51 } 52 53 int main(int, char**) { 54 test(); 55 static_assert(test()); 56 57 return 0; 58 } 59