63 lines
1.8 KiB
C++
63 lines
1.8 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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// UNSUPPORTED: libcpp-no-concepts
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// constexpr V base() const& requires copy_constructible<V>;
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// constexpr V base() &&;
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#include <cassert>
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#include <ranges>
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#include "test_macros.h"
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#include "types.h"
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constexpr bool hasLValueQualifiedBase(auto&& view) {
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return requires { view.base(); };
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}
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constexpr bool test() {
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int buffer[4][4] = {{1111, 2222, 3333, 4444}, {555, 666, 777, 888}, {99, 1010, 1111, 1212}, {13, 14, 15, 16}};
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{
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ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])};
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auto jv = std::ranges::join_view(ParentView{children});
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assert(std::move(jv).base().ptr_ == children);
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static_assert(!hasLValueQualifiedBase(jv));
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ASSERT_SAME_TYPE(decltype(std::move(jv).base()), ParentView<ChildView>);
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}
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{
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std::ranges::join_view jv(buffer);
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assert(jv.base().base() == buffer + 0);
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static_assert(hasLValueQualifiedBase(jv));
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ASSERT_SAME_TYPE(decltype(jv.base()), std::ranges::ref_view<int [4][4]>);
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}
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{
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const std::ranges::join_view jv(buffer);
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assert(jv.base().base() == buffer + 0);
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static_assert(hasLValueQualifiedBase(jv));
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ASSERT_SAME_TYPE(decltype(jv.base()), std::ranges::ref_view<int [4][4]>);
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}
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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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