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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 explicit iterator(iterator_t<Base> current);
#include <cassert>
#include <ranges>
#include <tuple>
#include "../types.h"
// Test explicit
using BaseIter = std::tuple<int>*;
using ElementsIter = std::ranges::iterator_t<std::ranges::elements_view<std::ranges::subrange<BaseIter, BaseIter>, 0>>;
static_assert(std::is_constructible_v<ElementsIter, BaseIter>);
static_assert(!std::is_convertible_v<BaseIter, ElementsIter>);
struct TracedMoveIter : IterBase<TracedMoveIter>{
bool moved = false;
constexpr TracedMoveIter() = default;
constexpr TracedMoveIter(const TracedMoveIter&) = default;
constexpr TracedMoveIter(TracedMoveIter&&) : moved{true} {}
constexpr TracedMoveIter& operator=(TracedMoveIter&&) = default;
constexpr TracedMoveIter& operator=(const TracedMoveIter&) = default;
};
struct TracedMoveView : std::ranges::view_base {
TracedMoveIter begin() const;
TracedMoveIter end() const;
};
constexpr bool test() {
using Iter = std::ranges::iterator_t<std::ranges::elements_view<TracedMoveView, 0>>;
Iter iter{TracedMoveIter{}};
assert(iter.base().moved);
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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