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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 // UNSUPPORTED: libcpp-has-no-threads
     11 
     12 // <future>
     13 
     14 // class promise<R>
     15 
     16 // promise(promise&& rhs);
     17 
     18 #include <future>
     19 #include <cassert>
     20 
     21 #include "../test_allocator.h"
     22 
     23 int main()
     24 {
     25 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     26     assert(test_alloc_base::count == 0);
     27     {
     28         std::promise<int> p0(std::allocator_arg, test_allocator<int>());
     29         std::promise<int> p(std::move(p0));
     30         assert(test_alloc_base::count == 1);
     31         std::future<int> f = p.get_future();
     32         assert(test_alloc_base::count == 1);
     33         assert(f.valid());
     34         try
     35         {
     36             f = p0.get_future();
     37             assert(false);
     38         }
     39         catch (const std::future_error& e)
     40         {
     41             assert(e.code() == make_error_code(std::future_errc::no_state));
     42         }
     43         assert(test_alloc_base::count == 1);
     44     }
     45     assert(test_alloc_base::count == 0);
     46     {
     47         std::promise<int&> p0(std::allocator_arg, test_allocator<int>());
     48         std::promise<int&> p(std::move(p0));
     49         assert(test_alloc_base::count == 1);
     50         std::future<int&> f = p.get_future();
     51         assert(test_alloc_base::count == 1);
     52         assert(f.valid());
     53         try
     54         {
     55             f = p0.get_future();
     56             assert(false);
     57         }
     58         catch (const std::future_error& e)
     59         {
     60             assert(e.code() == make_error_code(std::future_errc::no_state));
     61         }
     62         assert(test_alloc_base::count == 1);
     63     }
     64     assert(test_alloc_base::count == 0);
     65     {
     66         std::promise<void> p0(std::allocator_arg, test_allocator<void>());
     67         std::promise<void> p(std::move(p0));
     68         assert(test_alloc_base::count == 1);
     69         std::future<void> f = p.get_future();
     70         assert(test_alloc_base::count == 1);
     71         assert(f.valid());
     72         try
     73         {
     74             f = p0.get_future();
     75             assert(false);
     76         }
     77         catch (const std::future_error& e)
     78         {
     79             assert(e.code() == make_error_code(std::future_errc::no_state));
     80         }
     81         assert(test_alloc_base::count == 1);
     82     }
     83     assert(test_alloc_base::count == 0);
     84 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     85 }
     86