| 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 | // Test that iota_view conforms to range and view concepts. |
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| 12 | |
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| 13 | #include <ranges> |
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| 14 | |
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| 15 | #include "types.h" |
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| 16 | |
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| 17 | struct Decrementable { |
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| 18 | using difference_type = int; |
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| 19 | |
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| 20 | auto operator<=>(const Decrementable&) const = default; |
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| 21 | |
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| 22 | Decrementable& operator++(); |
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| 23 | Decrementable operator++(int); |
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| 24 | Decrementable& operator--(); |
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| 25 | Decrementable operator--(int); |
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| 26 | }; |
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| 27 | |
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| 28 | struct Incrementable { |
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| 29 | using difference_type = int; |
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| 30 | |
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| 31 | auto operator<=>(const Incrementable&) const = default; |
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| 32 | |
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| 33 | Incrementable& operator++(); |
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| 34 | Incrementable operator++(int); |
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| 35 | }; |
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| 36 | |
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| 37 | static_assert(std::ranges::random_access_range<std::ranges::iota_view<int>>); |
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| 38 | static_assert(std::ranges::random_access_range<const std::ranges::iota_view<int>>); |
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| 39 | static_assert(std::ranges::bidirectional_range<std::ranges::iota_view<Decrementable>>); |
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| 40 | static_assert(std::ranges::forward_range<std::ranges::iota_view<Incrementable>>); |
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| 41 | static_assert(std::ranges::input_range<std::ranges::iota_view<NotIncrementable>>); |
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| 42 | static_assert(std::ranges::view<std::ranges::iota_view<int>>); |
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| 43 | |
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