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//===----------------------------------------------------------------------===//
//
// 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;
}
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