libstdc++-v3/testsuite/std/time/clock/file/members.cc

   1 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++2a" }
  19 // { dg-do run { target c++2a } }
  20
  21 #include <chrono>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   auto sys_now = std::chrono::system_clock::now();
  28   auto file_now = std::chrono::file_clock::now();
  29   auto d1 = std::chrono::file_clock::to_sys(file_now) - sys_now;
  30   VERIFY( d1 < std::chrono::seconds(1) );
  31   auto d2 = file_now - std::chrono::file_clock::from_sys(sys_now);
  32   VERIFY( d2 == d1 );
  33 }
  34
  35 void
  36 test02()
  37 {
  38   using namespace std::chrono;
  39
  40   file_time<file_clock::duration> t = file_clock::now();
  41   file_time<seconds> s = floor<seconds>(t);
  42   VERIFY( t - s < 1s );
  43 }
  44
  45 int
  46 main()
  47 {
  48   test01();
  49   test02();
  50 }