/usr/include/c++/v1/experimental/ratio is in libc++-dev 6.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | // -*- C++ -*-
//===------------------------------ ratio ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_EXPERIMENTAL_RATIO
#define _LIBCPP_EXPERIMENTAL_RATIO
/**
experimental/ratio synopsis
C++1y
#include <ratio>
namespace std {
namespace experimental {
inline namespace fundamentals_v1 {
// See C++14 20.11.5, ratio comparison
template <class R1, class R2> constexpr bool ratio_equal_v
= ratio_equal<R1, R2>::value;
template <class R1, class R2> constexpr bool ratio_not_equal_v
= ratio_not_equal<R1, R2>::value;
template <class R1, class R2> constexpr bool ratio_less_v
= ratio_less<R1, R2>::value;
template <class R1, class R2> constexpr bool ratio_less_equal_v
= ratio_less_equal<R1, R2>::value;
template <class R1, class R2> constexpr bool ratio_greater_v
= ratio_greater<R1, R2>::value;
template <class R1, class R2> constexpr bool ratio_greater_equal_v
= ratio_greater_equal<R1, R2>::value;
} // namespace fundamentals_v1
} // namespace experimental
} // namespace std
*/
#include <experimental/__config>
#if _LIBCPP_STD_VER > 11
#include <ratio>
_LIBCPP_BEGIN_NAMESPACE_LFTS
#ifndef _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_equal_v
= ratio_equal<_R1, _R2>::value;
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_not_equal_v
= ratio_not_equal<_R1, _R2>::value;
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_less_v
= ratio_less<_R1, _R2>::value;
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_less_equal_v
= ratio_less_equal<_R1, _R2>::value;
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_greater_v
= ratio_greater<_R1, _R2>::value;
template <class _R1, class _R2> _LIBCPP_CONSTEXPR bool ratio_greater_equal_v
= ratio_greater_equal<_R1, _R2>::value;
#endif /* _LIBCPP_HAS_NO_VARIABLE_TEMPLATES */
_LIBCPP_END_NAMESPACE_LFTS
#endif /* _LIBCPP_STD_VER > 11 */
#endif // _LIBCPP_EXPERIMENTAL_RATIO
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