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// <memory>
10
11// unique_ptr
12
13// test constexpr explicit operator bool() const noexcept; // constexpr since C++23
14
15#include <memory>
16#include <cassert>
17
18#include "test_macros.h"
19#include "unique_ptr_test_helper.h"
20
21template <class UPtr>
22TEST_CONSTEXPR_CXX23 void doTest(UPtr& p, bool ExpectTrue) {
23 if (p)
24 assert(ExpectTrue);
25 else
26 assert(!ExpectTrue);
27
28 if (!p)
29 assert(!ExpectTrue);
30 else
31 assert(ExpectTrue);
32}
33
34template <bool IsArray>
35TEST_CONSTEXPR_CXX23 void test_basic() {
36 typedef typename std::conditional<IsArray, int[], int>::type VT;
37 typedef std::unique_ptr<VT> U;
38 {
39 static_assert((std::is_constructible<bool, U>::value), "");
40 static_assert((std::is_constructible<bool, U const&>::value), "");
41 }
42#if TEST_STD_VER >= 11
43 {
44 static_assert(!std::is_convertible<U, bool>::value, "");
45 static_assert(!std::is_convertible<U const&, bool>::value, "");
46 }
47#endif
48 {
49 U p(newValue<VT>(1));
50 U const& cp = p;
51 doTest(p, true);
52 doTest(cp, true);
53 }
54 {
55 U p;
56 const U& cp = p;
57 doTest(p, false);
58 doTest(cp, false);
59 }
60}
61
62TEST_CONSTEXPR_CXX23 bool test() {
63 test_basic</*IsArray*/ false>();
64 test_basic<true>();
65
66 return true;
67}
68
69int main(int, char**) {
70 test();
71#if TEST_STD_VER >= 23
72 static_assert(test());
73#endif
74
75 return 0;
76}

source code of libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.observers/explicit_bool.pass.cpp