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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 // typedef unspecified exception_ptr;
     13 
     14 // exception_ptr shall satisfy the requirements of NullablePointer.
     15 
     16 #include <exception>
     17 #include <cassert>
     18 
     19 int main()
     20 {
     21     std::exception_ptr p;
     22     assert(p == nullptr);
     23     std::exception_ptr p2 = p;
     24     assert(nullptr == p);
     25     assert(!p);
     26     assert(p2 == p);
     27     p2 = p;
     28     assert(p2 == p);
     29     assert(p2 == nullptr);
     30     std::exception_ptr p3 = nullptr;
     31     assert(p3 == nullptr);
     32     p3 = nullptr;
     33     assert(p3 == nullptr);
     34 }
     35