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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 // test get_unexpected
     11 
     12 #include <exception>
     13 #include <cassert>
     14 #include <cstdlib>
     15 
     16 void f1() {}
     17 void f2() {}
     18 
     19 void f3()
     20 {
     21     std::exit(0);
     22 }
     23 
     24 int main()
     25 {
     26 
     27     std::unexpected_handler old = std::get_unexpected();
     28     // verify there is a previous unexpected handler
     29     assert(old);
     30     std::set_unexpected(f1);
     31     assert(std::get_unexpected() == f1);
     32     // verify f1 was replace with f2
     33     std::set_unexpected(f2);
     34     assert(std::get_unexpected() == f2);
     35     // verify calling original unexpected handler calls terminate
     36     std::set_terminate(f3);
     37     (*old)();
     38     assert(0);
     39 }
     40