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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
// sentinel() = default;
#include <cassert>
#include <ranges>
#include <tuple>
struct PODSentinel {
int i; // deliberately uninitialised
friend constexpr bool operator==(std::tuple<int>*, const PODSentinel&) { return true; }
};
struct Range : std::ranges::view_base {
std::tuple<int>* begin() const;
PODSentinel end();
};
constexpr bool test() {
using EleView = std::ranges::elements_view<Range, 0>;
using Sentinel = std::ranges::sentinel_t<EleView>;
static_assert(!std::is_same_v<Sentinel, std::ranges::iterator_t<EleView>>);
{
Sentinel s;
assert(s.base().i == 0);
}
{
Sentinel s = {};
assert(s.base().i == 0);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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