1 // Variable Templates For chrono -*- C++ -*-
3 // Copyright (C) 2014-2025 Free Software Foundation, Inc.
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)
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.
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.
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/>.
25 /** @file experimental/chrono
26 * This is a TS C++ Library header.
31 // N3932 Variable Templates For Type Traits (Revision 1)
34 #ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
35 #define _GLIBCXX_EXPERIMENTAL_CHRONO 1
37 #ifdef _GLIBCXX_SYSHDR
38 #pragma GCC system_header
41 #include <bits/requires_hosted.h> // experimental is currently omitted
43 #if __cplusplus >= 201402L
45 #include <bits/chrono.h> // Only the C++14 parts of <chrono>
46 #include <experimental/bits/lfts_config.h>
48 namespace std _GLIBCXX_VISIBILITY(default)
50 _GLIBCXX_BEGIN_NAMESPACE_VERSION
53 namespace experimental
55 inline namespace fundamentals_v1
57 // See C++14 20.12.4, customization traits
58 template <typename _Rep>
59 constexpr bool treat_as_floating_point_v =
60 treat_as_floating_point<_Rep>::value;
61 } // namespace fundamentals_v1
62 } // namespace experimental
64 _GLIBCXX_END_NAMESPACE_VERSION
67 #endif // __cplusplus <= 201103L
69 #endif // _GLIBCXX_EXPERIMENTAL_CHRONO