40aaa272f1
Implemented [[ https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2711r1.html | P2711R1 ]] for existing views. (`join_with_view` is not yet implemented) Reviewed By: #libc, philnik Differential Revision: https://reviews.llvm.org/D144822
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// constexpr drop_view(V base, range_difference_t<V> count); // explicit since C++23
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#include <ranges>
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#include "test_convertible.h"
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#include "test_macros.h"
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#include "types.h"
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// SFINAE tests.
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#if TEST_STD_VER >= 23
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static_assert(!test_convertible<std::ranges::drop_view<View>, View, std::ranges::range_difference_t<View>>(),
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"This constructor must be explicit");
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#else
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static_assert(test_convertible<std::ranges::drop_view<View>, View, std::ranges::range_difference_t<View>>(),
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"This constructor must not be explicit");
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#endif // TEST_STD_VER >= 23
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constexpr bool test() {
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std::ranges::drop_view dropView1(MoveOnlyView(), 4);
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assert(dropView1.size() == 4);
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assert(dropView1.begin() == globalBuff + 4);
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std::ranges::drop_view dropView2(ForwardView(), 4);
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assert(base(dropView2.begin()) == globalBuff + 4);
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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