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      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(const nested_exception&) throw() = default;
     15 
     16 #include <exception>
     17 #include <cassert>
     18 
     19 #include "test_macros.h"
     20 
     21 class A
     22 {
     23     int data_;
     24 public:
     25     explicit A(int data) : data_(data) {}
     26 
     27     friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;}
     28 };
     29 
     30 int main()
     31 {
     32     {
     33         std::nested_exception e0;
     34         std::nested_exception e = e0;
     35         assert(e.nested_ptr() == nullptr);
     36     }
     37 #ifndef TEST_HAS_NO_EXCEPTIONS
     38     {
     39         try
     40         {
     41             throw A(2);
     42             assert(false);
     43         }
     44         catch (const A&)
     45         {
     46             std::nested_exception e0;
     47             std::nested_exception e = e0;
     48             assert(e.nested_ptr() != nullptr);
     49             try
     50             {
     51                 rethrow_exception(e.nested_ptr());
     52                 assert(false);
     53             }
     54             catch (const A& a)
     55             {
     56                 assert(a == A(2));
     57             }
     58         }
     59     }
     60 #endif
     61 }
     62