text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  //
  // UNSUPPORTED: libcpp-has-no-threads
  // UNSUPPORTED: c++98, c++03
  
  // <future>
  
  // class packaged_task<R(ArgTypes...)>
  
  // future<R> get_future();
  
  #include <future.hxx>
  #include <cassert.hxx>
  
  #include "test_macros.h"
  
  class A
  {
      long data_;
  
  public:
      explicit A(long i) : data_(i) {}
  
      long operator()(long i, long j) const {return data_ + i + j;}
  };
  
  int main(int, char**)
  {
      {
          std::packaged_task<double(int, char)> p(A(5));
          std::future<double> f = p.get_future();
          p(3, 'a');
          assert(f.get() == 105.0);
      }
  #ifndef TEST_HAS_NO_EXCEPTIONS
      {
          std::packaged_task<double(int, char)> p(A(5));
          std::future<double> f = p.get_future();
          try
          {
              f = p.get_future();
              assert(false);
          }
          catch (const std::future_error& e)
          {
              assert(e.code() ==  make_error_code(std::future_errc::future_already_retrieved));
          }
      }
      {
          std::packaged_task<double(int, char)> p;
          try
          {
              std::future<double> f = p.get_future();
              assert(false);
          }
          catch (const std::future_error& e)
          {
              assert(e.code() ==  make_error_code(std::future_errc::no_state));
          }
      }
  #endif
  
    return 0;
  }
  