1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14, c++17
10
11// <iterator>
12
13// move_sentinel
14
15// constexpr explicit move_sentinel(S s);
16
17#include <cassert>
18#include <iterator>
19#include <type_traits>
20
21constexpr bool test()
22{
23 // The underlying sentinel is an integer.
24 {
25 static_assert(!std::is_convertible_v<int, std::move_sentinel<int>>);
26 std::move_sentinel<int> m(42);
27 assert(m.base() == 42);
28 }
29
30 // The underlying sentinel is a pointer.
31 {
32 static_assert(!std::is_convertible_v<int*, std::move_sentinel<int*>>);
33 int i = 42;
34 std::move_sentinel<int*> m(&i);
35 assert(m.base() == &i);
36 }
37
38 // The underlying sentinel is a user-defined type with an explicit default constructor.
39 {
40 struct S {
41 explicit S() = default;
42 constexpr explicit S(int j) : i(j) {}
43 int i = 3;
44 };
45 static_assert(!std::is_convertible_v<S, std::move_sentinel<S>>);
46 std::move_sentinel<S> m(S(42));
47 assert(m.base().i == 42);
48 }
49 return true;
50}
51
52int main(int, char**)
53{
54 test();
55 static_assert(test());
56
57 return 0;
58}
59

source code of libcxx/test/std/iterators/predef.iterators/move.iterators/move.sentinel/ctor.sentinel.pass.cpp