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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
//
//===----------------------------------------------------------------------===//
// REQUIRES: std-at-least-c++23
// <ranges>
// constexpr sentinel(sentinel<!Const> s)
// requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
#include <ranges>
#include <type_traits>
#include <vector>
#include "../types.h"
#include "test_iterators.h"
constexpr bool test() {
{ // Regular conversion from `!Const` to `Const` sentinel
using Inner = BasicVectorView<int, ViewProperties{.common = false}, forward_iterator>;
std::vector<Inner> vec = {Inner{11, 12}, Inner{13, 14}};
std::ranges::join_with_view jwv(vec, 0);
using JWV = decltype(jwv);
static_assert(!std::ranges::common_range<JWV>);
using Sent = std::ranges::sentinel_t<JWV>;
using CSent = std::ranges::sentinel_t<const JWV>;
static_assert(!std::same_as<Sent, CSent>);
Sent se = jwv.end();
[[maybe_unused]] CSent cse = se;
}
{ // Test conversion from `Const` to `!Const` (should be invalid)
using Inner = BasicVectorView<int, ViewProperties{.common = false}, forward_iterator>;
using V = std::vector<Inner>;
using Pattern = std::ranges::single_view<int>;
using JWV = std::ranges::join_with_view<std::views::all_t<V>, Pattern>;
static_assert(!std::ranges::common_range<JWV>);
using Sent = std::ranges::sentinel_t<JWV>;
using CSent = std::ranges::sentinel_t<const JWV>;
static_assert(!std::convertible_to<CSent, Sent>);
static_assert(!std::constructible_from<Sent, CSent>);
}
{ // When `convertible_to<sentinel_t<V>, sentinel_t<Base>>` is not modeled
using V = ConstOppositeView<std::vector<long>>;
using Pattern = std::ranges::single_view<long>;
using JWV = std::ranges::join_with_view<V, Pattern>;
static_assert(!std::ranges::common_range<JWV>);
using Sent = std::ranges::sentinel_t<JWV>;
using CSent = std::ranges::sentinel_t<const JWV>;
static_assert(!std::convertible_to<CSent, Sent>);
static_assert(!std::constructible_from<Sent, CSent>);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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