libcxx/test/std/thread/futures/futures.promise/uses_allocator.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: no-threads
  10
  11 // <future>
  12
  13 // class promise<R>
  14
  15 // template <class R, class Alloc>
  16 //   struct uses_allocator<promise<R>, Alloc>
  17 //      : true_type { };
  18
  19 #include <future>
  20 #include "test_macros.h"
  21 #include "test_allocator.h"
  22
  23 int main(int, char**)
  24 {
  25     static_assert((std::uses_allocator<std::promise<int>, test_allocator<int> >::value), "");
  26     static_assert((std::uses_allocator<std::promise<int&>, test_allocator<int> >::value), "");
  27     static_assert((std::uses_allocator<std::promise<void>, test_allocator<void> >::value), "");
  28
  29   return 0;
  30 }