1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <exception>
11 
12 // class nested_exception;
13 
14 // nested_exception& operator=(const nested_exception&) throw() = default;
15 
16 #include <exception>
17 #include <cassert>
18 
19 class A
20 {
21     int data_;
22 public:
23     explicit A(int data) : data_(data) {}
24 
25     friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;}
26 };
27 
28 int main()
29 {
30     {
31         std::nested_exception e0;
32         std::nested_exception e;
33         e = e0;
34         assert(e.nested_ptr() == nullptr);
35     }
36     {
37         try
38         {
39             throw A(2);
40             assert(false);
41         }
42         catch (const A&)
43         {
44             std::nested_exception e0;
45             std::nested_exception e;
46             e = e0;
47             assert(e.nested_ptr() != nullptr);
48             try
49             {
50                 rethrow_exception(e.nested_ptr());
51                 assert(false);
52             }
53             catch (const A& a)
54             {
55                 assert(a == A(2));
56             }
57         }
58     }
59 }
60