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  1. // Variable Templates For chrono -*- C++ -*-
  2. // Copyright (C) 2014-2020 Free Software Foundation, Inc.
  3. //
  4. // This file is part of the GNU ISO C++ Library. This library is free
  5. // software; you can redistribute it and/or modify it under the
  6. // terms of the GNU General Public License as published by the
  7. // Free Software Foundation; either version 3, or (at your option)
  8. // any later version.
  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. // Under Section 7 of GPL version 3, you are granted additional
  14. // permissions described in the GCC Runtime Library Exception, version
  15. // 3.1, as published by the Free Software Foundation.
  16. // You should have received a copy of the GNU General Public License and
  17. // a copy of the GCC Runtime Library Exception along with this program;
  18. // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
  19. // <http://www.gnu.org/licenses/>.
  20. /** @file experimental/chrono
  21. * This is a TS C++ Library header.
  22. * @ingroup libfund-ts
  23. */
  24. //
  25. // N3932 Variable Templates For Type Traits (Revision 1)
  26. //
  27. #ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
  28. #define _GLIBCXX_EXPERIMENTAL_CHRONO 1
  29. #pragma GCC system_header
  30. #if __cplusplus >= 201402L
  31. #include <chrono>
  32. #include <experimental/bits/lfts_config.h>
  33. namespace std _GLIBCXX_VISIBILITY(default)
  34. {
  35. _GLIBCXX_BEGIN_NAMESPACE_VERSION
  36. namespace chrono {
  37. namespace experimental
  38. {
  39. inline namespace fundamentals_v1
  40. {
  41. // See C++14 20.12.4, customization traits
  42. template <typename _Rep>
  43. constexpr bool treat_as_floating_point_v =
  44. treat_as_floating_point<_Rep>::value;
  45. } // namespace fundamentals_v1
  46. } // namespace experimental
  47. } // namespace chrono
  48. _GLIBCXX_END_NAMESPACE_VERSION
  49. } // namespace std
  50. #endif // __cplusplus <= 201103L
  51. #endif // _GLIBCXX_EXPERIMENTAL_CHRONO