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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;
// constexpr explicit sentinel(sentinel_t<Base> end);
// constexpr sentinel(sentinel<!Const> s)
// requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
#include <ranges>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "../types.h"
constexpr bool test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
// Test the default ctor.
using TakeView = std::ranges::take_view<MoveOnlyView>;
using Sentinel = std::ranges::sentinel_t<TakeView>;
Sentinel s;
TakeView tv = TakeView(MoveOnlyView(buffer), 4);
assert(tv.begin() + 4 == s);
}
{
// Test the conversion from "sentinel" to "sentinel-to-const".
using TakeView = std::ranges::take_view<MoveOnlyView>;
using Sentinel = std::ranges::sentinel_t<TakeView>;
using ConstSentinel = std::ranges::sentinel_t<const TakeView>;
static_assert(std::is_convertible_v<Sentinel, ConstSentinel>);
TakeView tv = TakeView(MoveOnlyView(buffer), 4);
Sentinel s = tv.end();
ConstSentinel cs = s;
cs = s; // test assignment also
assert(tv.begin() + 4 == s);
assert(tv.begin() + 4 == cs);
assert(std::as_const(tv).begin() + 4 == s);
assert(std::as_const(tv).begin() + 4 == cs);
}
{
// Test the constructor from "base-sentinel" to "sentinel".
using TakeView = std::ranges::take_view<MoveOnlyView>;
using Sentinel = std::ranges::sentinel_t<TakeView>;
sentinel_wrapper<int*> sw1 = MoveOnlyView(buffer).end();
static_assert( std::is_constructible_v<Sentinel, sentinel_wrapper<int*>>);
static_assert(!std::is_convertible_v<sentinel_wrapper<int*>, Sentinel>);
auto s = Sentinel(sw1);
std::same_as<sentinel_wrapper<int*>> auto sw2 = s.base();
assert(base(sw2) == base(sw1));
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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