34#ifndef _GLIBCXX_EXPERIMENTAL_CHRONO
35#define _GLIBCXX_EXPERIMENTAL_CHRONO 1
37#pragma GCC system_header
41#if __cplusplus >= 201402L
46namespace std _GLIBCXX_VISIBILITY(default)
48_GLIBCXX_BEGIN_NAMESPACE_VERSION
53inline namespace fundamentals_v1
56template <
typename _Rep>
57 constexpr bool treat_as_floating_point_v =
58 treat_as_floating_point<_Rep>::value;
62_GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.