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() throw();
15 
16 #include <exception>
17 #include <cassert>
18 
19 class A
20 {
21     int data_;
22 public:
A(int data)23     explicit A(int data) : data_(data) {}
24 
operator ==(const A & x,const A & y)25     friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;}
26 };
27 
main()28 int main()
29 {
30     {
31         std::nested_exception e;
32         assert(e.nested_ptr() == nullptr);
33     }
34     {
35         try
36         {
37             throw A(2);
38             assert(false);
39         }
40         catch (const A&)
41         {
42             std::nested_exception e;
43             assert(e.nested_ptr() != nullptr);
44             try
45             {
46                 rethrow_exception(e.nested_ptr());
47                 assert(false);
48             }
49             catch (const A& a)
50             {
51                 assert(a == A(2));
52             }
53         }
54     }
55 }
56