libcxx/test/std/thread/thread.threads/thread.thread.class/thread.thread.id/thread_id.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 // <thread>
  12
  13 // template <class T>
  14 // struct hash
  15 // {
  16 //     size_t operator()(T val) const;
  17 // };
  18
  19 // Not very portable
  20
  21 #include <cassert>
  22 #include <functional>
  23 #include <thread>
  24
  25 #include "test_macros.h"
  26
  27 int main(int, char**)
  28 {
  29     std::thread::id id1;
  30     std::thread::id id2 = std::this_thread::get_id();
  31     typedef std::hash<std::thread::id> H;
  32 #if TEST_STD_VER <= 14
  33     static_assert((std::is_same<typename H::argument_type, std::thread::id>::value), "" );
  34     static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
  35 #endif
  36     ASSERT_NOEXCEPT(H()(id2));
  37     H h;
  38     assert(h(id1) != h(id2));
  39
  40   return 0;
  41 }