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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 sentinel(sentinel_t<Base> end);
#include <cassert>
#include <ranges>
#include <tuple>
#include <utility>
struct Sent {
int i;
friend constexpr bool operator==(std::tuple<int>*, const Sent&) { return true; }
};
struct Range : std::ranges::view_base {
std::tuple<int>* begin() const;
Sent end();
};
// Test explicit
static_assert(std::is_constructible_v<std::ranges::sentinel_t<std::ranges::elements_view<Range, 0>>, Sent>);
static_assert(!std::is_convertible_v<Sent, std::ranges::sentinel_t<std::ranges::elements_view<Range, 0>>>);
constexpr bool test() {
// base is init correctly
{
using R = std::ranges::elements_view<Range, 0>;
using Sentinel = std::ranges::sentinel_t<R>;
Sentinel s1(Sent{5});
assert(s1.base().i == 5);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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