34#ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
35#define _GLIBCXX_EXPERIMENTAL_CHRONO 1
38#pragma GCC system_header
43#if __cplusplus >= 201402L
48namespace std _GLIBCXX_VISIBILITY(default)
50_GLIBCXX_BEGIN_NAMESPACE_VERSION
55inline namespace fundamentals_v1
58template <
typename _Rep>
59 constexpr bool treat_as_floating_point_v =
60 treat_as_floating_point<_Rep>::value;
64_GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.
ISO C++ 2011 namespace for date and time utilities.