File: ctor.pass.cpp

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (71 lines) | stat: -rw-r--r-- 2,398 bytes parent folder | download | duplicates (8)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
//===----------------------------------------------------------------------===//
//
// 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;
}