libstdc++
experimental/chrono
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1 // Variable Templates For chrono -*- C++ -*-
2 
3 // Copyright (C) 2014-2017 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  */
28 
29 //
30 // N3932 Variable Templates For Type Traits (Revision 1)
31 //
32 
33 #ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
34 #define _GLIBCXX_EXPERIMENTAL_CHRONO 1
35 
36 #pragma GCC system_header
37 
38 #if __cplusplus <= 201103L
39 # include <bits/c++14_warning.h>
40 #else
41 
42 #include <chrono>
44 
45 namespace std _GLIBCXX_VISIBILITY(default)
46 {
47 namespace chrono {
48 namespace experimental
49 {
50 inline namespace fundamentals_v1
51 {
52 _GLIBCXX_BEGIN_NAMESPACE_VERSION
53 // See C++14 ยง20.12.4, customization traits
54 template <typename _Rep>
55  constexpr bool treat_as_floating_point_v =
56  treat_as_floating_point<_Rep>::value;
57 _GLIBCXX_END_NAMESPACE_VERSION
58 } // namespace fundamentals_v1
59 } // namespace experimental
60 } // namespace chrono
61 } // namespace std
62 
63 #endif // __cplusplus <= 201103L
64 
65 #endif // _GLIBCXX_EXPERIMENTAL_CHRONO
ISO C++ entities toplevel namespace is std.