libstdc++-v3/include/experimental/chrono

   1 // Variable Templates For chrono -*- C++ -*-
   2
   3 // Copyright (C) 2014-2021 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file experimental/chrono
  26  *  This is a TS C++ Library header.
  27  *  @ingroup libfund-ts
  28  */
  29
  30 //
  31 // N3932 Variable Templates For Type Traits (Revision 1)
  32 //
  33
  34 #ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
  35 #define _GLIBCXX_EXPERIMENTAL_CHRONO 1
  36
  37 #pragma GCC system_header
  38
  39 #if __cplusplus >= 201402L
  40
  41 #include <chrono>
  42 #include <experimental/bits/lfts_config.h>
  43
  44 namespace std _GLIBCXX_VISIBILITY(default)
  45 {
  46 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  47
  48 namespace chrono {
  49 namespace experimental
  50 {
  51 inline namespace fundamentals_v1
  52 {
  53 // See C++14 20.12.4, customization traits
  54 template <typename _Rep>
  55    constexpr bool treat_as_floating_point_v =
  56      treat_as_floating_point<_Rep>::value;
  57 } // namespace fundamentals_v1
  58 } // namespace experimental
  59 } // namespace chrono
  60 _GLIBCXX_END_NAMESPACE_VERSION
  61 } // namespace std
  62
  63 #endif // __cplusplus <= 201103L
  64
  65 #endif // _GLIBCXX_EXPERIMENTAL_CHRONO