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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: !c++experimental
// iterator() requires default_initializable<OuterIter> = default;
#include <ranges>
#include <cassert>
#include <type_traits>
#include "test_iterators.h"
#include "../types.h"
template <class It>
struct view : std::ranges::view_base {
It begin() const;
sentinel_wrapper<It> end() const;
};
template <class It>
constexpr void test_default_constructible() {
using JoinView = std::ranges::join_view<view<It>>;
using JoinIterator = std::ranges::iterator_t<JoinView>;
static_assert(std::is_default_constructible_v<JoinIterator>);
JoinIterator it; (void)it;
}
template <class It>
constexpr void test_non_default_constructible() {
using JoinView = std::ranges::join_view<view<It>>;
using JoinIterator = std::ranges::iterator_t<JoinView>;
static_assert(!std::is_default_constructible_v<JoinIterator>);
}
constexpr bool test() {
test_non_default_constructible<cpp17_input_iterator<ChildView*>>();
// NOTE: cpp20_input_iterator can't be used with join_view because it is not copyable.
test_default_constructible<forward_iterator<ChildView*>>();
test_default_constructible<bidirectional_iterator<ChildView*>>();
test_default_constructible<random_access_iterator<ChildView*>>();
test_default_constructible<contiguous_iterator<ChildView*>>();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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