| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // constexpr V base() const& requires copy_constructible<V> { return base_; } |
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| 12 | // constexpr V base() && { return std::move(base_); } |
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| 13 | |
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| 14 | #include <ranges> |
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| 15 | |
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| 16 | #include "test_macros.h" |
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| 17 | #include "types.h" |
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| 18 | |
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| 19 | constexpr bool test() { |
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| 20 | std::ranges::drop_view<MoveOnlyView> dropView1; |
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| 21 | auto base1 = std::move(dropView1).base(); |
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| 22 | assert(std::ranges::begin(base1) == globalBuff); |
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| 23 | |
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| 24 | // Note: we should *not* drop two elements here. |
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| 25 | std::ranges::drop_view<MoveOnlyView> dropView2(MoveOnlyView{4}, 2); |
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| 26 | auto base2 = std::move(dropView2).base(); |
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| 27 | assert(std::ranges::begin(base2) == globalBuff + 4); |
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| 28 | |
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| 29 | std::ranges::drop_view<CopyableView> dropView3; |
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| 30 | auto base3 = dropView3.base(); |
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| 31 | assert(std::ranges::begin(base3) == globalBuff); |
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| 32 | auto base4 = std::move(dropView3).base(); |
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| 33 | assert(std::ranges::begin(base4) == globalBuff); |
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| 34 | |
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| 35 | return true; |
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| 36 | } |
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| 37 | |
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| 38 | int main(int, char**) { |
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| 39 | test(); |
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| 40 | static_assert(test()); |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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