| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // constexpr auto end(); |
| // constexpr auto end() const; |
| |
| #include <cassert> |
| #include <ranges> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| #include "types.h" |
| |
| |
| constexpr bool test() { |
| int buffer[4][4] = {{1111, 2222, 3333, 4444}, {555, 666, 777, 888}, {99, 1010, 1111, 1212}, {13, 14, 15, 16}}; |
| |
| // Non const common, forward range. |
| { |
| std::ranges::join_view jv(buffer); |
| assert(jv.end() == std::ranges::next(jv.begin(), 16)); |
| |
| static_assert(std::same_as<decltype(jv.end()), decltype(jv.begin())>); |
| } |
| |
| // Non const not common, input range. |
| { |
| ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 16)); |
| |
| static_assert(!std::same_as<decltype(jv.end()), decltype(jv.begin())>); |
| } |
| |
| // Const common, forward range. |
| { |
| const std::ranges::join_view jv(buffer); |
| assert(jv.end() == std::ranges::next(jv.begin(), 16)); |
| |
| static_assert(std::same_as<decltype(jv.end()), decltype(jv.begin())>); |
| } |
| |
| // Const not common, input range. |
| { |
| static_assert(std::is_reference_v<std::ranges::range_reference_t<const CopyableParent>>); |
| |
| CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]), CopyableChild(buffer[3])}; |
| const auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 16)); |
| |
| static_assert(!std::same_as<decltype(jv.end()), decltype(jv.begin())>); |
| } |
| |
| // Has some empty children. |
| { |
| CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 1), CopyableChild(buffer[3], 0)}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 5)); |
| } |
| // Parent is empty. |
| { |
| CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]), CopyableChild(buffer[3])}; |
| std::ranges::join_view jv(ParentView(children, 0)); |
| assert(jv.end() == jv.begin()); |
| } |
| // Parent size is one. |
| { |
| CopyableChild children[1] = {CopyableChild(buffer[0])}; |
| std::ranges::join_view jv(ParentView(children, 1)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 4)); |
| } |
| // Parent and child size is one. |
| { |
| CopyableChild children[1] = {CopyableChild(buffer[0], 1)}; |
| std::ranges::join_view jv(ParentView(children, 1)); |
| assert(jv.end() == std::ranges::next(jv.begin())); |
| } |
| // Parent size is one child is empty |
| { |
| CopyableChild children[1] = {CopyableChild(buffer[0], 0)}; |
| std::ranges::join_view jv(ParentView(children, 1)); |
| assert(jv.end() == jv.begin()); |
| } |
| // Has all empty children. |
| { |
| CopyableChild children[4] = {CopyableChild(buffer[0], 0), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 0), CopyableChild(buffer[3], 0)}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == jv.begin()); |
| } |
| // First child is empty, others are not. |
| { |
| CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 0), CopyableChild(buffer[3], 0)}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 4)); |
| } |
| // Last child is empty, others are not. |
| { |
| CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 4), CopyableChild(buffer[2], 4), CopyableChild(buffer[3], 0)}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| assert(jv.end() == std::ranges::next(jv.begin(), 12)); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |