libcxx/test/std/time/time.clock/time.clock.system/consistency.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 // Due to C++17 inline variables ASAN flags this test as containing an ODR
  10 // violation because Clock::is_steady is defined in both the dylib and this TU.
  11 // UNSUPPORTED: asan
  12
  13 // <chrono>
  14
  15 // system_clock
  16
  17 // check clock invariants
  18
  19 #include <chrono>
  20 #include <type_traits>
  21
  22 #include "test_macros.h"
  23
  24 template <class T>
  25 void test(const T &) {}
  26
  27 int main(int, char**)
  28 {
  29     typedef std::chrono::system_clock C;
  30     static_assert((std::is_same<C::rep, C::duration::rep>::value), "");
  31     static_assert((std::is_same<C::period, C::duration::period>::value), "");
  32     static_assert((std::is_same<C::duration, C::time_point::duration>::value), "");
  33     static_assert((std::is_same<C::time_point::clock, C>::value), "");
  34     static_assert((C::is_steady || !C::is_steady), "");
  35     test(std::chrono::system_clock::is_steady);
  36
  37   return 0;
  38 }