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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
// constexpr decltype(auto) operator*() const;
#include <cassert>
#include <ranges>
#include "test_macros.h"
#include "../types.h"
constexpr bool test() {
int buffer[4][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}};
{
std::ranges::join_view jv(buffer);
auto iter = jv.begin();
for (int i = 1; i < 17; ++i) {
assert(*iter++ == i);
}
}
{
std::ranges::join_view jv(buffer);
auto iter = std::next(jv.begin(), 15);
assert(*iter++ == 16);
assert(iter == jv.end());
}
{
ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])};
auto jv = std::ranges::join_view(ParentView(children));
auto iter = jv.begin();
for (int i = 1; i < 17; ++i) {
assert(*iter == i);
++iter;
}
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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