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 // shared_ptr
12 
13 // explicit operator bool() const;
14 
15 #include <memory>
16 #include <cassert>
17 #include <type_traits>
18 
19 #include "test_macros.h"
20 
21 struct A {
22   int a;
~AA23   virtual ~A() {}
24 };
25 struct B : A {};
26 
main(int,char **)27 int main(int, char**)
28 {
29     static_assert(std::is_constructible<bool, std::shared_ptr<A> >::value, "");
30     static_assert(!std::is_convertible<std::shared_ptr<A>, bool>::value, "");
31 
32     {
33       const std::shared_ptr<int> p(new int(32));
34       assert(p);
35     }
36     {
37       const std::shared_ptr<int> p;
38       assert(!p);
39     }
40 #if !defined(TEST_HAS_NO_RTTI)
41     {
42       std::shared_ptr<A> basePtr = std::make_shared<B>();
43       std::shared_ptr<B> sp = std::dynamic_pointer_cast<B>(basePtr);
44       assert(sp);
45     }
46 #endif
47 
48     return 0;
49 }
50