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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-has-no-incomplete-ranges
// constexpr iterator(Parent& parent, OuterIter outer);
#include <cassert>
#include <ranges>
#include "../types.h"
using NonDefaultCtrIter = cpp20_input_iterator<int*>;
static_assert(!std::default_initializable<NonDefaultCtrIter>);
using NonDefaultCtrIterView = BufferView<NonDefaultCtrIter, sentinel_wrapper<NonDefaultCtrIter>>;
static_assert(std::ranges::input_range<NonDefaultCtrIterView>);
constexpr bool test() {
int buffer[4][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}};
{
CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]),
CopyableChild(buffer[3])};
CopyableParent parent{children};
std::ranges::join_view jv(parent);
std::ranges::iterator_t<decltype(jv)> iter(jv, std::ranges::begin(parent));
assert(*iter == 1);
}
{
// LWG3569 Inner iterator not default_initializable
// With the current spec, the constructor under test invokes Inner iterator's default constructor
// even if it is not default constructible
// This test is checking that this constructor can be invoked with an inner range with non default
// constructible iterator
NonDefaultCtrIterView inners[] = {buffer[0], buffer[1]};
auto outer = std::views::all(inners);
std::ranges::join_view jv(outer);
std::ranges::iterator_t<decltype(jv)> iter(jv, std::ranges::begin(outer));
assert(*iter == 1);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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