chrono
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// <chrono> -*- C++ -*-
// Copyright (C) 2008-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file include/chrono
* This is a Standard C++ Library header.
* @ingroup chrono
*/
#ifndef _GLIBCXX_CHRONO
#define _GLIBCXX_CHRONO 1
#pragma GCC system_header
#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
#include <ratio>
#include <type_traits>
#include <limits>
#include <ctime>
#include <bits/parse_numbers.h> // for literals support.
#if __cplusplus > 201703L
# include <concepts>
# include <compare>
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#if __cplusplus >= 201703L
namespace filesystem { struct __file_clock; };
#endif
/**
* @defgroup chrono Time
* @ingroup utilities
*
* Classes and functions for time.
*
* @since C++11
*/
/** @namespace std::chrono
* @brief ISO C++ 2011 namespace for date and time utilities
* @ingroup chrono
*/
namespace chrono
{
/// @addtogroup chrono
/// @{
/// `chrono::duration` represents a distance between two points in time
template<typename _Rep, typename _Period = ratio<1>>
struct duration;
/// `chrono::time_point` represents a point in time as measured by a clock
template<typename _Clock, typename _Dur = typename _Clock::duration>
struct time_point;
/// @}
}
/// @addtogroup chrono
/// @{
// 20.11.4.3 specialization of common_type (for duration, sfinae-friendly)
/// @cond undocumented
template<typename _CT, typename _Period1, typename _Period2, typename = void>
struct __duration_common_type
{ };
template<typename _CT, typename _Period1, typename _Period2>
struct __duration_common_type<_CT, _Period1, _Period2,
__void_t<typename _CT::type>>
{
private:
using __gcd_num = __static_gcd<_Period1::num, _Period2::num>;
using __gcd_den = __static_gcd<_Period1::den, _Period2::den>;
using __cr = typename _CT::type;
using __r = ratio<__gcd_num::value,
(_Period1::den / __gcd_den::value) * _Period2::den>;
public:
using type = chrono::duration<__cr, typename __r::type>;
};
/// @endcond
/// @{
/// @relates chrono::duration
/// Specialization of common_type for chrono::duration types.
template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
struct common_type<chrono::duration<_Rep1, _Period1>,
chrono::duration<_Rep2, _Period2>>
: __duration_common_type<common_type<_Rep1, _Rep2>,
typename _Period1::type,
typename _Period2::type>
{ };
/// Specialization of common_type for two identical chrono::duration types.
template<typename _Rep, typename _Period>
struct common_type<chrono::duration<_Rep, _Period>,
chrono::duration<_Rep, _Period>>
{
using type = chrono::duration<typename common_type<_Rep>::type,
typename _Period::type>;
};
/// Specialization of common_type for one chrono::duration type.
template<typename _Rep, typename _Period>
struct common_type<chrono::duration<_Rep, _Period>>
{
using type = chrono::duration<typename common_type<_Rep>::type,
typename _Period::type>;
};
/// @}
// 20.11.4.3 specialization of common_type (for time_point, sfinae-friendly)
/// @cond undocumented
template<typename _CT, typename _Clock, typename = void>
struct __timepoint_common_type
{ };
template<typename _CT, typename _Clock>
struct __timepoint_common_type<_CT, _Clock, __void_t<typename _CT::type>>
{
using type = chrono::time_point<_Clock, typename _CT::type>;
};
/// @endcond
/// @{
/// @relates chrono::time_point
/// Specialization of common_type for chrono::time_point types.
template<typename _Clock, typename _Duration1, typename _Duration2>
struct common_type<chrono::time_point<_Clock, _Duration1>,
chrono::time_point<_Clock, _Duration2>>
: __timepoint_common_type<common_type<_Duration1, _Duration2>, _Clock>
{ };
/// Specialization of common_type for two identical chrono::time_point types.
template<typename _Clock, typename _Duration>
struct common_type<chrono::time_point<_Clock, _Duration>,
chrono::time_point<_Clock, _Duration>>
{ using type = chrono::time_point<_Clock, _Duration>; };
/// Specialization of common_type for one chrono::time_point type.
template<typename _Clock, typename _Duration>
struct common_type<chrono::time_point<_Clock, _Duration>>
{ using type = chrono::time_point<_Clock, _Duration>; };
/// @}
/// @} group chrono
namespace chrono
{
/// @addtogroup chrono
/// @{
/// @cond undocumented
// Primary template for duration_cast impl.
template<typename _ToDur, typename _CF, typename _CR,
bool _NumIsOne = false, bool _DenIsOne = false>
struct __duration_cast_impl
{
template<typename _Rep, typename _Period>
static constexpr _ToDur
__cast(const duration<_Rep, _Period>& __d)
{
typedef typename _ToDur::rep __to_rep;
return _ToDur(static_cast<__to_rep>(static_cast<_CR>(__d.count())
* static_cast<_CR>(_CF::num)
/ static_cast<_CR>(_CF::den)));
}
};
template<typename _ToDur, typename _CF, typename _CR>
struct __duration_cast_impl<_ToDur, _CF, _CR, true, true>
{
template<typename _Rep, typename _Period>
static constexpr _ToDur
__cast(const duration<_Rep, _Period>& __d)
{
typedef typename _ToDur::rep __to_rep;
return _ToDur(static_cast<__to_rep>(__d.count()));
}
};
template<typename _ToDur, typename _CF, typename _CR>
struct __duration_cast_impl<_ToDur, _CF, _CR, true, false>
{
template<typename _Rep, typename _Period>
static constexpr _ToDur
__cast(const duration<_Rep, _Period>& __d)
{
typedef typename _ToDur::rep __to_rep;
return _ToDur(static_cast<__to_rep>(
static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den)));
}
};
template<typename _ToDur, typename _CF, typename _CR>
struct __duration_cast_impl<_ToDur, _CF, _CR, false, true>
{
template<typename _Rep, typename _Period>
static constexpr _ToDur
__cast(const duration<_Rep, _Period>& __d)
{
typedef typename _ToDur::rep __to_rep;
return _ToDur(static_cast<__to_rep>(
static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num)));
}
};
template<typename _Tp>
struct __is_duration
: std::false_type
{ };
template<typename _Rep, typename _Period>
struct __is_duration<duration<_Rep, _Period>>
: std::true_type
{ };
template<typename _Tp>
using __enable_if_is_duration
= typename enable_if<__is_duration<_Tp>::value, _Tp>::type;
template<typename _Tp>
using __disable_if_is_duration
= typename enable_if<!__is_duration<_Tp>::value, _Tp>::type;
/// @endcond
/// duration_cast
template<typename _ToDur, typename _Rep, typename _Period>
constexpr __enable_if_is_duration<_ToDur>
duration_cast(const duration<_Rep, _Period>& __d)
{
typedef typename _ToDur::period __to_period;
typedef typename _ToDur::rep __to_rep;
typedef ratio_divide<_Period, __to_period> __cf;
typedef typename common_type<__to_rep, _Rep, intmax_t>::type
__cr;
typedef __duration_cast_impl<_ToDur, __cf, __cr,
__cf::num == 1, __cf::den == 1> __dc;
return __dc::__cast(__d);
}
/// treat_as_floating_point
template<typename _Rep>
struct treat_as_floating_point
: is_floating_point<_Rep>
{ };
#if __cplusplus > 201402L
template <typename _Rep>
inline constexpr bool treat_as_floating_point_v =
treat_as_floating_point<_Rep>::value;
#endif // C++17
#if __cplusplus > 201703L
template<typename _Tp>
struct is_clock;
template<typename _Tp>
inline constexpr bool is_clock_v = is_clock<_Tp>::value;
#if __cpp_lib_concepts
template<typename _Tp>
struct is_clock : false_type
{ };
template<typename _Tp>
requires requires {
typename _Tp::rep;
typename _Tp::period;
typename _Tp::duration;
typename _Tp::time_point::clock;
typename _Tp::time_point::duration;
{ &_Tp::is_steady } -> same_as<const bool*>;
{ _Tp::now() } -> same_as<typename _Tp::time_point>;
requires same_as<typename _Tp::duration,
duration<typename _Tp::rep, typename _Tp::period>>;
requires same_as<typename _Tp::time_point::duration,
typename _Tp::duration>;
}
struct is_clock<_Tp> : true_type
{ };
#else
template<typename _Tp, typename = void>
struct __is_clock_impl : false_type
{ };
template<typename _Tp>
struct __is_clock_impl<_Tp,
void_t<typename _Tp::rep, typename _Tp::period,
typename _Tp::duration,
typename _Tp::time_point::duration,
decltype(_Tp::is_steady),
decltype(_Tp::now())>>
: __and_<is_same<typename _Tp::duration,
duration<typename _Tp::rep, typename _Tp::period>>,
is_same<typename _Tp::time_point::duration,
typename _Tp::duration>,
is_same<decltype(&_Tp::is_steady), const bool*>,
is_same<decltype(_Tp::now()), typename _Tp::time_point>>::type
{ };
template<typename _Tp>
struct is_clock : __is_clock_impl<_Tp>::type
{ };
#endif
#endif // C++20
#if __cplusplus >= 201703L
# define __cpp_lib_chrono 201611
template<typename _ToDur, typename _Rep, typename _Period>
constexpr __enable_if_is_duration<_ToDur>
floor(const duration<_Rep, _Period>& __d)
{
auto __to = chrono::duration_cast<_ToDur>(__d);
if (__to > __d)
return __to - _ToDur{1};
return __to;
}
template<typename _ToDur, typename _Rep, typename _Period>
constexpr __enable_if_is_duration<_ToDur>
ceil(const duration<_Rep, _Period>& __d)
{
auto __to = chrono::duration_cast<_ToDur>(__d);
if (__to < __d)
return __to + _ToDur{1};
return __to;
}
template <typename _ToDur, typename _Rep, typename _Period>
constexpr enable_if_t<
__and_<__is_duration<_ToDur>,
__not_<treat_as_floating_point<typename _ToDur::rep>>>::value,
_ToDur>
round(const duration<_Rep, _Period>& __d)
{
_ToDur __t0 = chrono::floor<_ToDur>(__d);
_ToDur __t1 = __t0 + _ToDur{1};
auto __diff0 = __d - __t0;
auto __diff1 = __t1 - __d;
if (__diff0 == __diff1)
{
if (__t0.count() & 1)
return __t1;
return __t0;
}
else if (__diff0 < __diff1)
return __t0;
return __t1;
}
template<typename _Rep, typename _Period>
constexpr
enable_if_t<numeric_limits<_Rep>::is_signed, duration<_Rep, _Period>>
abs(duration<_Rep, _Period> __d)
{
if (__d >= __d.zero())
return __d;
return -__d;
}
// Make chrono::ceil<D> also usable as chrono::__detail::ceil<D>.
namespace __detail { using chrono::ceil; }
#else // ! C++17
// We want to use ceil even when compiling for earlier standards versions.
// C++11 only allows a single statement in a constexpr function, so we
// need to move the comparison into a separate function, __ceil_impl.
namespace __detail
{
template<typename _Tp, typename _Up>
constexpr _Tp
__ceil_impl(const _Tp& __t, const _Up& __u)
{
return (__t < __u) ? (__t + _Tp{1}) : __t;
}
// C++11-friendly version of std::chrono::ceil<D> for internal use.
template<typename _ToDur, typename _Rep, typename _Period>
constexpr _ToDur
ceil(const duration<_Rep, _Period>& __d)
{
return __detail::__ceil_impl(chrono::duration_cast<_ToDur>(__d), __d);
}
}
#endif // C++17
/// duration_values
template<typename _Rep>
struct duration_values
{
static constexpr _Rep
zero() noexcept
{ return _Rep(0); }
static constexpr _Rep
max() noexcept
{ return numeric_limits<_Rep>::max(); }
static constexpr _Rep
min() noexcept
{ return numeric_limits<_Rep>::lowest(); }
};
/// @cond undocumented
template<typename _Tp>
struct __is_ratio
: std::false_type
{ };
template<intmax_t _Num, intmax_t _Den>
struct __is_ratio<ratio<_Num, _Den>>
: std::true_type
{ };
/// @endcond
template<typename _Rep, typename _Period>
struct duration
{
private:
template<typename _Rep2>
using __is_float = treat_as_floating_point<_Rep2>;
static constexpr intmax_t
_S_gcd(intmax_t __m, intmax_t __n) noexcept
{
// Duration only allows positive periods so we don't need to
// handle negative values here (unlike __static_gcd and std::gcd).
#if __cplusplus >= 201402L
do
{
intmax_t __rem = __m % __n;
__m = __n;
__n = __rem;
}
while (__n != 0);
return __m;
#else
// C++11 doesn't allow loops in constexpr functions, but this
// recursive version can be more expensive to evaluate.
return (__n == 0) ? __m : _S_gcd(__n, __m % __n);
#endif
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 2094. overflow shouldn't participate in overload resolution
// 3090. What is [2094] intended to mean?
// This only produces a valid type if no overflow occurs.
template<typename _R1, typename _R2,
intmax_t __gcd1 = _S_gcd(_R1::num, _R2::num),
intmax_t __gcd2 = _S_gcd(_R1::den, _R2::den)>
using __divide = ratio<(_R1::num / __gcd1) * (_R2::den / __gcd2),
(_R1::den / __gcd2) * (_R2::num / __gcd1)>;
// _Period2 is an exact multiple of _Period
template<typename _Period2>
using __is_harmonic
= __bool_constant<__divide<_Period2, _Period>::den == 1>;
public:
using rep = _Rep;
using period = typename _Period::type;
static_assert(!__is_duration<_Rep>::value, "rep cannot be a duration");
static_assert(__is_ratio<_Period>::value,
"period must be a specialization of ratio");
static_assert(_Period::num > 0, "period must be positive");
// 20.11.5.1 construction / copy / destroy
constexpr duration() = default;
duration(const duration&) = default;
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 3050. Conversion specification problem in chrono::duration
template<typename _Rep2, typename = _Require<
is_convertible<const _Rep2&, rep>,
__or_<__is_float<rep>, __not_<__is_float<_Rep2>>>>>
constexpr explicit duration(const _Rep2& __rep)
: __r(static_cast<rep>(__rep)) { }
template<typename _Rep2, typename _Period2, typename = _Require<
is_convertible<const _Rep2&, rep>,
__or_<__is_float<rep>,
__and_<__is_harmonic<_Period2>,
__not_<__is_float<_Rep2>>>>>>
constexpr duration(const duration<_Rep2, _Period2>& __d)
: __r(duration_cast<duration>(__d).count()) { }
~duration() = default;
duration& operator=(const duration&) = default;
// 20.11.5.2 observer
constexpr rep
count() const
{ return __r; }
// 20.11.5.3 arithmetic
constexpr duration<typename common_type<rep>::type, period>
operator+() const
{ return duration<typename common_type<rep>::type, period>(__r); }
constexpr duration<typename common_type<rep>::type, period>
operator-() const
{ return duration<typename common_type<rep>::type, period>(-__r); }
_GLIBCXX17_CONSTEXPR duration&
operator++()
{
++__r;
return *this;
}
_GLIBCXX17_CONSTEXPR duration
operator++(int)
{ return duration(__r++); }
_GLIBCXX17_CONSTEXPR duration&
operator--()
{
--__r;
return *this;
}
_GLIBCXX17_CONSTEXPR duration
operator--(int)
{ return duration(__r--); }
_GLIBCXX17_CONSTEXPR duration&
operator+=(const duration& __d)
{
__r += __d.count();
return *this;
}
_GLIBCXX17_CONSTEXPR duration&
operator-=(const duration& __d)
{
__r -= __d.count();
return *this;
}
_GLIBCXX17_CONSTEXPR duration&
operator*=(const rep& __rhs)
{
__r *= __rhs;
return *this;
}
_GLIBCXX17_CONSTEXPR duration&
operator/=(const rep& __rhs)
{
__r /= __rhs;
return *this;
}
// DR 934.
template<typename _Rep2 = rep>
_GLIBCXX17_CONSTEXPR
typename enable_if<!treat_as_floating_point<_Rep2>::value,
duration&>::type
operator%=(const rep& __rhs)
{
__r %= __rhs;
return *this;
}
template<typename _Rep2 = rep>
_GLIBCXX17_CONSTEXPR
typename enable_if<!treat_as_floating_point<_Rep2>::value,
duration&>::type
operator%=(const duration& __d)
{
__r %= __d.count();
return *this;
}
// 20.11.5.4 special values
static constexpr duration
zero() noexcept
{ return duration(duration_values<rep>::zero()); }
static constexpr duration
min() noexcept
{ return duration(duration_values<rep>::min()); }
static constexpr duration
max() noexcept
{ return duration(duration_values<rep>::max()); }
private:
rep __r;
};
/// @{
/// @relates std::chrono::duration
/// The sum of two durations.
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr typename common_type<duration<_Rep1, _Period1>,
duration<_Rep2, _Period2>>::type
operator+(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __cd;
return __cd(__cd(__lhs).count() + __cd(__rhs).count());
}
/// The difference between two durations.
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr typename common_type<duration<_Rep1, _Period1>,
duration<_Rep2, _Period2>>::type
operator-(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __cd;
return __cd(__cd(__lhs).count() - __cd(__rhs).count());
}
/// @}
/// @cond undocumented
// SFINAE helper to obtain common_type<_Rep1, _Rep2> only if _Rep2
// is implicitly convertible to it.
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 3050. Conversion specification problem in chrono::duration constructor
template<typename _Rep1, typename _Rep2,
typename _CRep = typename common_type<_Rep1, _Rep2>::type>
using __common_rep_t = typename
enable_if<is_convertible<const _Rep2&, _CRep>::value, _CRep>::type;
/// @endcond
/** @{
* Arithmetic operators for chrono::duration
* @relates std::chrono::duration
*/
template<typename _Rep1, typename _Period, typename _Rep2>
constexpr duration<__common_rep_t<_Rep1, _Rep2>, _Period>
operator*(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
{
typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
__cd;
return __cd(__cd(__d).count() * __s);
}
template<typename _Rep1, typename _Rep2, typename _Period>
constexpr duration<__common_rep_t<_Rep2, _Rep1>, _Period>
operator*(const _Rep1& __s, const duration<_Rep2, _Period>& __d)
{ return __d * __s; }
template<typename _Rep1, typename _Period, typename _Rep2>
constexpr
duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period>
operator/(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
{
typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
__cd;
return __cd(__cd(__d).count() / __s);
}
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr typename common_type<_Rep1, _Rep2>::type
operator/(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __cd;
return __cd(__lhs).count() / __cd(__rhs).count();
}
// DR 934.
template<typename _Rep1, typename _Period, typename _Rep2>
constexpr
duration<__common_rep_t<_Rep1, __disable_if_is_duration<_Rep2>>, _Period>
operator%(const duration<_Rep1, _Period>& __d, const _Rep2& __s)
{
typedef duration<typename common_type<_Rep1, _Rep2>::type, _Period>
__cd;
return __cd(__cd(__d).count() % __s);
}
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr typename common_type<duration<_Rep1, _Period1>,
duration<_Rep2, _Period2>>::type
operator%(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __cd;
return __cd(__cd(__lhs).count() % __cd(__rhs).count());
}
/// @}
// comparisons
/** @{
* Comparisons for chrono::duration
* @relates std::chrono::duration
*/
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator==(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __ct;
return __ct(__lhs).count() == __ct(__rhs).count();
}
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator<(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<__dur1,__dur2>::type __ct;
return __ct(__lhs).count() < __ct(__rhs).count();
}
#if __cpp_lib_three_way_comparison
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
requires three_way_comparable<common_type_t<_Rep1, _Rep2>>
constexpr auto
operator<=>(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
using __ct = common_type_t<duration<_Rep1, _Period1>,
duration<_Rep2, _Period2>>;
return __ct(__lhs).count() <=> __ct(__rhs).count();
}
#else
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator!=(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{ return !(__lhs == __rhs); }
#endif
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator<=(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{ return !(__rhs < __lhs); }
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator>(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{ return __rhs < __lhs; }
template<typename _Rep1, typename _Period1,
typename _Rep2, typename _Period2>
constexpr bool
operator>=(const duration<_Rep1, _Period1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{ return !(__lhs < __rhs); }
/// @}
/// @cond undocumented
#ifdef _GLIBCXX_USE_C99_STDINT_TR1
# define _GLIBCXX_CHRONO_INT64_T int64_t
#elif defined __INT64_TYPE__
# define _GLIBCXX_CHRONO_INT64_T __INT64_TYPE__
#else
static_assert(std::numeric_limits<unsigned long long>::digits >= 64,
"Representation type for nanoseconds must have at least 64 bits");
# define _GLIBCXX_CHRONO_INT64_T long long
#endif
/// @endcond
/// nanoseconds
using nanoseconds = duration<_GLIBCXX_CHRONO_INT64_T, nano>;
/// microseconds
using microseconds = duration<_GLIBCXX_CHRONO_INT64_T, micro>;
/// milliseconds
using milliseconds = duration<_GLIBCXX_CHRONO_INT64_T, milli>;
/// seconds
using seconds = duration<_GLIBCXX_CHRONO_INT64_T>;
/// minutes
using minutes = duration<_GLIBCXX_CHRONO_INT64_T, ratio< 60>>;
/// hours
using hours = duration<_GLIBCXX_CHRONO_INT64_T, ratio<3600>>;
#if __cplusplus > 201703L
/// days
using days = duration<_GLIBCXX_CHRONO_INT64_T, ratio<86400>>;
/// weeks
using weeks = duration<_GLIBCXX_CHRONO_INT64_T, ratio<604800>>;
/// years
using years = duration<_GLIBCXX_CHRONO_INT64_T, ratio<31556952>>;
/// months
using months = duration<_GLIBCXX_CHRONO_INT64_T, ratio<2629746>>;
#endif // C++20
#undef _GLIBCXX_CHRONO_INT64_T
template<typename _Clock, typename _Dur>
struct time_point
{
static_assert(__is_duration<_Dur>::value,
"duration must be a specialization of std::chrono::duration");
typedef _Clock clock;
typedef _Dur duration;
typedef typename duration::rep rep;
typedef typename duration::period period;
constexpr time_point() : __d(duration::zero())
{ }
constexpr explicit time_point(const duration& __dur)
: __d(__dur)
{ }
// conversions
template<typename _Dur2,
typename = _Require<is_convertible<_Dur2, _Dur>>>
constexpr time_point(const time_point<clock, _Dur2>& __t)
: __d(__t.time_since_epoch())
{ }
// observer
constexpr duration
time_since_epoch() const
{ return __d; }
#if __cplusplus > 201703L
constexpr time_point&
operator++()
{
++__d;
return *this;
}
constexpr time_point
operator++(int)
{ return time_point{__d++}; }
constexpr time_point&
operator--()
{
--__d;
return *this;
}
constexpr time_point
operator--(int)
{ return time_point{__d--}; }
#endif
// arithmetic
_GLIBCXX17_CONSTEXPR time_point&
operator+=(const duration& __dur)
{
__d += __dur;
return *this;
}
_GLIBCXX17_CONSTEXPR time_point&
operator-=(const duration& __dur)
{
__d -= __dur;
return *this;
}
// special values
static constexpr time_point
min() noexcept
{ return time_point(duration::min()); }
static constexpr time_point
max() noexcept
{ return time_point(duration::max()); }
private:
duration __d;
};
/// time_point_cast
template<typename _ToDur, typename _Clock, typename _Dur>
constexpr typename enable_if<__is_duration<_ToDur>::value,
time_point<_Clock, _ToDur>>::type
time_point_cast(const time_point<_Clock, _Dur>& __t)
{
typedef time_point<_Clock, _ToDur> __time_point;
return __time_point(duration_cast<_ToDur>(__t.time_since_epoch()));
}
#if __cplusplus > 201402L
template<typename _ToDur, typename _Clock, typename _Dur>
constexpr
enable_if_t<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>>
floor(const time_point<_Clock, _Dur>& __tp)
{
return time_point<_Clock, _ToDur>{
chrono::floor<_ToDur>(__tp.time_since_epoch())};
}
template<typename _ToDur, typename _Clock, typename _Dur>
constexpr
enable_if_t<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>>
ceil(const time_point<_Clock, _Dur>& __tp)
{
return time_point<_Clock, _ToDur>{
chrono::ceil<_ToDur>(__tp.time_since_epoch())};
}
template<typename _ToDur, typename _Clock, typename _Dur>
constexpr enable_if_t<
__and_<__is_duration<_ToDur>,
__not_<treat_as_floating_point<typename _ToDur::rep>>>::value,
time_point<_Clock, _ToDur>>
round(const time_point<_Clock, _Dur>& __tp)
{
return time_point<_Clock, _ToDur>{
chrono::round<_ToDur>(__tp.time_since_epoch())};
}
#endif // C++17
/// @{
/// @relates time_point
/// Adjust a time point forwards by the given duration.
template<typename _Clock, typename _Dur1,
typename _Rep2, typename _Period2>
constexpr time_point<_Clock,
typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
operator+(const time_point<_Clock, _Dur1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<_Dur1,__dur2>::type __ct;
typedef time_point<_Clock, __ct> __time_point;
return __time_point(__lhs.time_since_epoch() + __rhs);
}
/// Adjust a time point forwards by the given duration.
template<typename _Rep1, typename _Period1,
typename _Clock, typename _Dur2>
constexpr time_point<_Clock,
typename common_type<duration<_Rep1, _Period1>, _Dur2>::type>
operator+(const duration<_Rep1, _Period1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{
typedef duration<_Rep1, _Period1> __dur1;
typedef typename common_type<__dur1,_Dur2>::type __ct;
typedef time_point<_Clock, __ct> __time_point;
return __time_point(__rhs.time_since_epoch() + __lhs);
}
/// Adjust a time point backwards by the given duration.
template<typename _Clock, typename _Dur1,
typename _Rep2, typename _Period2>
constexpr time_point<_Clock,
typename common_type<_Dur1, duration<_Rep2, _Period2>>::type>
operator-(const time_point<_Clock, _Dur1>& __lhs,
const duration<_Rep2, _Period2>& __rhs)
{
typedef duration<_Rep2, _Period2> __dur2;
typedef typename common_type<_Dur1,__dur2>::type __ct;
typedef time_point<_Clock, __ct> __time_point;
return __time_point(__lhs.time_since_epoch() -__rhs);
}
/// The difference between two time points (as a duration)
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr typename common_type<_Dur1, _Dur2>::type
operator-(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return __lhs.time_since_epoch() - __rhs.time_since_epoch(); }
/// @}
/** @{
* Comparisons for time_point
* @relates chrono::time_point
*/
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator==(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return __lhs.time_since_epoch() == __rhs.time_since_epoch(); }
#if __cpp_lib_three_way_comparison
template<typename _Clock, typename _Dur1,
three_way_comparable_with<_Dur1> _Dur2>
constexpr auto
operator<=>(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return __lhs.time_since_epoch() <=> __rhs.time_since_epoch(); }
#else
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator!=(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return !(__lhs == __rhs); }
#endif
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator<(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return __lhs.time_since_epoch() < __rhs.time_since_epoch(); }
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator<=(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return !(__rhs < __lhs); }
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator>(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return __rhs < __lhs; }
template<typename _Clock, typename _Dur1, typename _Dur2>
constexpr bool
operator>=(const time_point<_Clock, _Dur1>& __lhs,
const time_point<_Clock, _Dur2>& __rhs)
{ return !(__lhs < __rhs); }
/// @}
// Clocks.
// Why nanosecond resolution as the default?
// Why have std::system_clock always count in the highest
// resolution (ie nanoseconds), even if on some OSes the low 3
// or 9 decimal digits will be always zero? This allows later
// implementations to change the system_clock::now()
// implementation any time to provide better resolution without
// changing function signature or units.
// To support the (forward) evolution of the library's defined
// clocks, wrap inside inline namespace so that the current
// defintions of system_clock, steady_clock, and
// high_resolution_clock types are uniquely mangled. This way, new
// code can use the latests clocks, while the library can contain
// compatibility definitions for previous versions. At some
// point, when these clocks settle down, the inlined namespaces
// can be removed. XXX GLIBCXX_ABI Deprecated
inline namespace _V2 {
/**
* @brief System clock.
*
* Time returned represents wall time from the system-wide clock.
* @ingroup chrono
*/
struct system_clock
{
typedef chrono::nanoseconds duration;
typedef duration::rep rep;
typedef duration::period period;
typedef chrono::time_point<system_clock, duration> time_point;
static_assert(system_clock::duration::min()
< system_clock::duration::zero(),
"a clock's minimum duration cannot be less than its epoch");
static constexpr bool is_steady = false;
static time_point
now() noexcept;
// Map to C API
static std::time_t
to_time_t(const time_point& __t) noexcept
{
return std::time_t(duration_cast<chrono::seconds>
(__t.time_since_epoch()).count());
}
static time_point
from_time_t(std::time_t __t) noexcept
{
typedef chrono::time_point<system_clock, seconds> __from;
return time_point_cast<system_clock::duration>
(__from(chrono::seconds(__t)));
}
};
/**
* @brief Monotonic clock
*
* Time returned has the property of only increasing at a uniform rate.
* @ingroup chrono
*/
struct steady_clock
{
typedef chrono::nanoseconds duration;
typedef duration::rep rep;
typedef duration::period period;
typedef chrono::time_point<steady_clock, duration> time_point;
static constexpr bool is_steady = true;
static time_point
now() noexcept;
};
/**
* @brief Highest-resolution clock
*
* This is the clock "with the shortest tick period." Alias to
* std::system_clock until higher-than-nanosecond definitions
* become feasible.
* @ingroup chrono
*/
using high_resolution_clock = system_clock;
} // end inline namespace _V2
#if __cplusplus > 201703L
template<typename _Duration>
using sys_time = time_point<system_clock, _Duration>;
using sys_seconds = sys_time<seconds>;
using sys_days = sys_time<days>;
using file_clock = ::std::filesystem::__file_clock;
template<typename _Duration>
using file_time = time_point<file_clock, _Duration>;
template<> struct is_clock<system_clock> : true_type { };
template<> struct is_clock<steady_clock> : true_type { };
template<> struct is_clock<file_clock> : true_type { };
template<> inline constexpr bool is_clock_v<system_clock> = true;
template<> inline constexpr bool is_clock_v<steady_clock> = true;
template<> inline constexpr bool is_clock_v<file_clock> = true;
struct local_t { };
template<typename _Duration>
using local_time = time_point<local_t, _Duration>;
using local_seconds = local_time<seconds>;
using local_days = local_time<days>;
class utc_clock;
class tai_clock;
class gps_clock;
template<typename _Duration>
using utc_time = time_point<utc_clock, _Duration>;
using utc_seconds = utc_time<seconds>;
template<typename _Duration>
using tai_time = time_point<tai_clock, _Duration>;
using tai_seconds = tai_time<seconds>;
template<typename _Duration>
using gps_time = time_point<gps_clock, _Duration>;
using gps_seconds = gps_time<seconds>;
template<> struct is_clock<utc_clock> : true_type { };
template<> struct is_clock<tai_clock> : true_type { };
template<> struct is_clock<gps_clock> : true_type { };
template<> inline constexpr bool is_clock_v<utc_clock> = true;
template<> inline constexpr bool is_clock_v<tai_clock> = true;
template<> inline constexpr bool is_clock_v<gps_clock> = true;
struct leap_second_info
{
bool is_leap_second;
seconds elapsed;
};
// CALENDRICAL TYPES
// CLASS DECLARATIONS
class day;
class month;
class year;
class weekday;
class weekday_indexed;
class weekday_last;
class month_day;
class month_day_last;
class month_weekday;
class month_weekday_last;
class year_month;
class year_month_day;
class year_month_day_last;
class year_month_weekday;
class year_month_weekday_last;
struct last_spec
{
explicit last_spec() = default;
friend constexpr month_day_last
operator/(int __m, last_spec) noexcept;
friend constexpr month_day_last
operator/(last_spec, int __m) noexcept;
};
inline constexpr last_spec last{};
namespace __detail
{
// Compute the remainder of the Euclidean division of __n divided by __d.
// Euclidean division truncates toward negative infinity and always
// produces a remainder in the range of [0,__d-1] (whereas standard
// division truncates toward zero and yields a nonpositive remainder
// for negative __n).
constexpr unsigned
__modulo(long long __n, unsigned __d)
{
if (__n >= 0)
return __n % __d;
else
return (__d + (__n % __d)) % __d;
}
inline constexpr unsigned __days_per_month[12]
= { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
}
// DAY
class day
{
private:
unsigned char _M_d;
public:
day() = default;
explicit constexpr
day(unsigned __d) noexcept
: _M_d(__d)
{ }
constexpr day&
operator++() noexcept
{
++_M_d;
return *this;
}
constexpr day
operator++(int) noexcept
{
auto __ret = *this;
++(*this);
return __ret;
}
constexpr day&
operator--() noexcept
{
--_M_d;
return *this;
}
constexpr day
operator--(int) noexcept
{
auto __ret = *this;
--(*this);
return __ret;
}
constexpr day&
operator+=(const days& __d) noexcept
{
*this = *this + __d;
return *this;
}
constexpr day&
operator-=(const days& __d) noexcept
{
*this = *this - __d;
return *this;
}
constexpr explicit
operator unsigned() const noexcept
{ return _M_d; }
constexpr bool
ok() const noexcept
{ return 1 <= _M_d && _M_d <= 31; }
friend constexpr bool
operator==(const day& __x, const day& __y) noexcept
{ return unsigned{__x} == unsigned{__y}; }
friend constexpr strong_ordering
operator<=>(const day& __x, const day& __y) noexcept
{ return unsigned{__x} <=> unsigned{__y}; }
friend constexpr day
operator+(const day& __x, const days& __y) noexcept
{ return day(unsigned{__x} + __y.count()); }
friend constexpr day
operator+(const days& __x, const day& __y) noexcept
{ return __y + __x; }
friend constexpr day
operator-(const day& __x, const days& __y) noexcept
{ return __x + -__y; }
friend constexpr days
operator-(const day& __x, const day& __y) noexcept
{ return days{int(unsigned{__x}) - int(unsigned{__y})}; }
friend constexpr month_day
operator/(const month& __m, const day& __d) noexcept;
friend constexpr month_day
operator/(int __m, const day& __d) noexcept;
friend constexpr month_day
operator/(const day& __d, const month& __m) noexcept;
friend constexpr month_day
operator/(const day& __d, int __m) noexcept;
friend constexpr year_month_day
operator/(const year_month& __ym, const day& __d) noexcept;
// TODO: Implement operator<<, to_stream, from_stream.
};
// MONTH
class month
{
private:
unsigned char _M_m;
public:
month() = default;
explicit constexpr
month(unsigned __m) noexcept
: _M_m(__m)
{ }
constexpr month&
operator++() noexcept
{
*this += months{1};
return *this;
}
constexpr month
operator++(int) noexcept
{
auto __ret = *this;
++(*this);
return __ret;
}
constexpr month&
operator--() noexcept
{
*this -= months{1};
return *this;
}
constexpr month
operator--(int) noexcept
{
auto __ret = *this;
--(*this);
return __ret;
}
constexpr month&
operator+=(const months& __m) noexcept
{
*this = *this + __m;
return *this;
}
constexpr month&
operator-=(const months& __m) noexcept
{
*this = *this - __m;
return *this;
}
explicit constexpr
operator unsigned() const noexcept
{ return _M_m; }
constexpr bool
ok() const noexcept
{ return 1 <= _M_m && _M_m <= 12; }
friend constexpr bool
operator==(const month& __x, const month& __y) noexcept
{ return unsigned{__x} == unsigned{__y}; }
friend constexpr strong_ordering
operator<=>(const month& __x, const month& __y) noexcept
{ return unsigned{__x} <=> unsigned{__y}; }
friend constexpr month
operator+(const month& __x, const months& __y) noexcept
{
auto __n = static_cast<long long>(unsigned{__x}) + (__y.count() - 1);
return month{__detail::__modulo(__n, 12) + 1};
}
friend constexpr month
operator+(const months& __x, const month& __y) noexcept
{ return __y + __x; }
friend constexpr month
operator-(const month& __x, const months& __y) noexcept
{ return __x + -__y; }
friend constexpr months
operator-(const month& __x, const month& __y) noexcept
{
const auto __dm = int(unsigned(__x)) - int(unsigned(__y));
return months{__dm < 0 ? 12 + __dm : __dm};
}
friend constexpr year_month
operator/(const year& __y, const month& __m) noexcept;
friend constexpr month_day
operator/(const month& __m, int __d) noexcept;
friend constexpr month_day_last
operator/(const month& __m, last_spec) noexcept;
friend constexpr month_day_last
operator/(last_spec, const month& __m) noexcept;
friend constexpr month_weekday
operator/(const month& __m, const weekday_indexed& __wdi) noexcept;
friend constexpr month_weekday
operator/(const weekday_indexed& __wdi, const month& __m) noexcept;
friend constexpr month_weekday_last
operator/(const month& __m, const weekday_last& __wdl) noexcept;
friend constexpr month_weekday_last
operator/(const weekday_last& __wdl, const month& __m) noexcept;
// TODO: Implement operator<<, to_stream, from_stream.
};
inline constexpr month January{1};
inline constexpr month February{2};
inline constexpr month March{3};
inline constexpr month April{4};
inline constexpr month May{5};
inline constexpr month June{6};
inline constexpr month July{7};
inline constexpr month August{8};
inline constexpr month September{9};
inline constexpr month October{10};
inline constexpr month November{11};
inline constexpr month December{12};
// YEAR
class year
{
private:
short _M_y;
public:
year() = default;
explicit constexpr
year(int __y) noexcept
: _M_y{static_cast<short>(__y)}
{ }
static constexpr year
min() noexcept
{ return year{-32767}; }
static constexpr year
max() noexcept
{ return year{32767}; }
constexpr year&
operator++() noexcept
{
++_M_y;
return *this;
}
constexpr year
operator++(int) noexcept
{
auto __ret = *this;
++(*this);
return __ret;
}
constexpr year&
operator--() noexcept
{
--_M_y;
return *this;
}
constexpr year
operator--(int) noexcept
{
auto __ret = *this;
--(*this);
return __ret;
}
constexpr year&
operator+=(const years& __y) noexcept
{
*this = *this + __y;
return *this;
}
constexpr year&
operator-=(const years& __y) noexcept
{
*this = *this - __y;
return *this;
}
constexpr year
operator+() const noexcept
{ return *this; }
constexpr year
operator-() const noexcept
{ return year{-_M_y}; }
constexpr bool
is_leap() const noexcept
{
// Testing divisibility by 100 first gives better performance, that is,
// return (_M_y % 100 != 0 || _M_y % 400 == 0) && _M_y % 4 == 0;
// It gets even faster if _M_y is in [-536870800, 536870999]
// (which is the case here) and _M_y % 100 is replaced by
// __is_multiple_of_100 below.
// References:
// [1] https://github.com/cassioneri/calendar
// [2] https://accu.org/journals/overload/28/155/overload155.pdf#page=16
constexpr uint32_t __multiplier = 42949673;
constexpr uint32_t __bound = 42949669;
constexpr uint32_t __max_dividend = 1073741799;
constexpr uint32_t __offset = __max_dividend / 2 / 100 * 100;
const bool __is_multiple_of_100
= __multiplier * (_M_y + __offset) < __bound;
return (!__is_multiple_of_100 || _M_y % 400 == 0) && _M_y % 4 == 0;
}
explicit constexpr
operator int() const noexcept
{ return _M_y; }
constexpr bool
ok() const noexcept
{ return min()._M_y <= _M_y && _M_y <= max()._M_y; }
friend constexpr bool
operator==(const year& __x, const year& __y) noexcept
{ return int{__x} == int{__y}; }
friend constexpr strong_ordering
operator<=>(const year& __x, const year& __y) noexcept
{ return int{__x} <=> int{__y}; }
friend constexpr year
operator+(const year& __x, const years& __y) noexcept
{ return year{int{__x} + static_cast<int>(__y.count())}; }
friend constexpr year
operator+(const years& __x, const year& __y) noexcept
{ return __y + __x; }
friend constexpr year
operator-(const year& __x, const years& __y) noexcept
{ return __x + -__y; }
friend constexpr years
operator-(const year& __x, const year& __y) noexcept
{ return years{int{__x} - int{__y}}; }
friend constexpr year_month
operator/(const year& __y, int __m) noexcept;
friend constexpr year_month_day
operator/(const year& __y, const month_day& __md) noexcept;
friend constexpr year_month_day
operator/(const month_day& __md, const year& __y) noexcept;
friend constexpr year_month_day_last
operator/(const year& __y, const month_day_last& __mdl) noexcept;
friend constexpr year_month_day_last
operator/(const month_day_last& __mdl, const year& __y) noexcept;
friend constexpr year_month_weekday
operator/(const year& __y, const month_weekday& __mwd) noexcept;
friend constexpr year_month_weekday
operator/(const month_weekday& __mwd, const year& __y) noexcept;
friend constexpr year_month_weekday_last
operator/(const year& __y, const month_weekday_last& __mwdl) noexcept;
friend constexpr year_month_weekday_last
operator/(const month_weekday_last& __mwdl, const year& __y) noexcept;
// TODO: Implement operator<<, to_stream, from_stream.
};
// WEEKDAY
class weekday
{
private:
unsigned char _M_wd;
static constexpr weekday
_S_from_days(const days& __d)
{
auto __n = __d.count();
return weekday(__n >= -4 ? (__n + 4) % 7 : (__n + 5) % 7 + 6);
}
public:
weekday() = default;
explicit constexpr
weekday(unsigned __wd) noexcept
: _M_wd(__wd == 7 ? 0 : __wd) // __wd % 7 ?
{ }
constexpr
weekday(const sys_days& __dp) noexcept
: weekday{_S_from_days(__dp.time_since_epoch())}
{ }
explicit constexpr
weekday(const local_days& __dp) noexcept
: weekday{sys_days{__dp.time_since_epoch()}}
{ }
constexpr weekday&
operator++() noexcept
{
*this += days{1};
return *this;
}
constexpr weekday
operator++(int) noexcept
{
auto __ret = *this;
++(*this);
return __ret;
}
constexpr weekday&
operator--() noexcept
{
*this -= days{1};
return *this;
}
constexpr weekday
operator--(int) noexcept
{
auto __ret = *this;
--(*this);
return __ret;
}
constexpr weekday&
operator+=(const days& __d) noexcept
{
*this = *this + __d;
return *this;
}
constexpr weekday&
operator-=(const days& __d) noexcept
{
*this = *this - __d;
return *this;
}
constexpr unsigned
c_encoding() const noexcept
{ return _M_wd; }
constexpr unsigned
iso_encoding() const noexcept
{ return _M_wd == 0u ? 7u : _M_wd; }
constexpr bool
ok() const noexcept
{ return _M_wd <= 6; }
constexpr weekday_indexed
operator[](unsigned __index) const noexcept;
constexpr weekday_last
operator[](last_spec) const noexcept;
friend constexpr bool
operator==(const weekday& __x, const weekday& __y) noexcept
{ return __x._M_wd == __y._M_wd; }
friend constexpr weekday
operator+(const weekday& __x, const days& __y) noexcept
{
auto __n = static_cast<long long>(__x._M_wd) + __y.count();
return weekday{__detail::__modulo(__n, 7)};
}
friend constexpr weekday
operator+(const days& __x, const weekday& __y) noexcept
{ return __y + __x; }
friend constexpr weekday
operator-(const weekday& __x, const days& __y) noexcept
{ return __x + -__y; }
friend constexpr days
operator-(const weekday& __x, const weekday& __y) noexcept
{
auto __n = static_cast<long long>(__x._M_wd) - __y._M_wd;
return days{__detail::__modulo(__n, 7)};
}
// TODO: operator<<, from_stream.
};
inline constexpr weekday Sunday{0};
inline constexpr weekday Monday{1};
inline constexpr weekday Tuesday{2};
inline constexpr weekday Wednesday{3};
inline constexpr weekday Thursday{4};
inline constexpr weekday Friday{5};
inline constexpr weekday Saturday{6};
// WEEKDAY_INDEXED
class weekday_indexed
{
private:
chrono::weekday _M_wd;
unsigned char _M_index;
public:
weekday_indexed() = default;
constexpr
weekday_indexed(const chrono::weekday& __wd, unsigned __index) noexcept
: _M_wd(__wd), _M_index(__index)
{ }
constexpr chrono::weekday
weekday() const noexcept
{ return _M_wd; }
constexpr unsigned
index() const noexcept
{ return _M_index; };
constexpr bool
ok() const noexcept
{ return _M_wd.ok() && 1 <= _M_index && _M_index <= 5; }
friend constexpr bool
operator==(const weekday_indexed& __x, const weekday_indexed& __y) noexcept
{ return __x.weekday() == __y.weekday() && __x.index() == __y.index(); }
friend constexpr month_weekday
operator/(const month& __m, const weekday_indexed& __wdi) noexcept;
friend constexpr month_weekday
operator/(int __m, const weekday_indexed& __wdi) noexcept;
friend constexpr month_weekday
operator/(const weekday_indexed& __wdi, const month& __m) noexcept;
friend constexpr month_weekday
operator/(const weekday_indexed& __wdi, int __m) noexcept;
friend constexpr year_month_weekday
operator/(const year_month& __ym, const weekday_indexed& __wdi) noexcept;
// TODO: Implement operator<<.
};
constexpr weekday_indexed
weekday::operator[](unsigned __index) const noexcept
{ return {*this, __index}; }
// WEEKDAY_LAST
class weekday_last
{
private:
chrono::weekday _M_wd;
public:
explicit constexpr
weekday_last(const chrono::weekday& __wd) noexcept
: _M_wd{__wd}
{ }
constexpr chrono::weekday
weekday() const noexcept
{ return _M_wd; }
constexpr bool
ok() const noexcept
{ return _M_wd.ok(); }
friend constexpr bool
operator==(const weekday_last& __x, const weekday_last& __y) noexcept
{ return __x.weekday() == __y.weekday(); }
friend constexpr month_weekday_last
operator/(int __m, const weekday_last& __wdl) noexcept;
friend constexpr month_weekday_last
operator/(const weekday_last& __wdl, int __m) noexcept;
friend constexpr year_month_weekday_last
operator/(const year_month& __ym, const weekday_last& __wdl) noexcept;
// TODO: Implement operator<<.
};
constexpr weekday_last
weekday::operator[](last_spec) const noexcept
{ return weekday_last{*this}; }
// MONTH_DAY
class month_day
{
private:
chrono::month _M_m;
chrono::day _M_d;
public:
month_day() = default;
constexpr
month_day(const chrono::month& __m, const chrono::day& __d) noexcept
: _M_m{__m}, _M_d{__d}
{ }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::day
day() const noexcept
{ return _M_d; }
constexpr bool
ok() const noexcept
{
return _M_m.ok()
&& 1u <= unsigned(_M_d)
&& unsigned(_M_d) <= __detail::__days_per_month[unsigned(_M_m) - 1];
}
friend constexpr bool
operator==(const month_day& __x, const month_day& __y) noexcept
{ return __x.month() == __y.month() && __x.day() == __y.day(); }
friend constexpr strong_ordering
operator<=>(const month_day& __x, const month_day& __y) noexcept
= default;
friend constexpr month_day
operator/(const chrono::month& __m, const chrono::day& __d) noexcept
{ return {__m, __d}; }
friend constexpr month_day
operator/(const chrono::month& __m, int __d) noexcept
{ return {__m, chrono::day(unsigned(__d))}; }
friend constexpr month_day
operator/(int __m, const chrono::day& __d) noexcept
{ return {chrono::month(unsigned(__m)), __d}; }
friend constexpr month_day
operator/(const chrono::day& __d, const chrono::month& __m) noexcept
{ return {__m, __d}; }
friend constexpr month_day
operator/(const chrono::day& __d, int __m) noexcept
{ return {chrono::month(unsigned(__m)), __d}; }
friend constexpr year_month_day
operator/(int __y, const month_day& __md) noexcept;
friend constexpr year_month_day
operator/(const month_day& __md, int __y) noexcept;
// TODO: Implement operator<<, from_stream.
};
// MONTH_DAY_LAST
class month_day_last
{
private:
chrono::month _M_m;
public:
explicit constexpr
month_day_last(const chrono::month& __m) noexcept
: _M_m{__m}
{ }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr bool
ok() const noexcept
{ return _M_m.ok(); }
friend constexpr bool
operator==(const month_day_last& __x, const month_day_last& __y) noexcept
{ return __x.month() == __y.month(); }
friend constexpr strong_ordering
operator<=>(const month_day_last& __x, const month_day_last& __y) noexcept
= default;
friend constexpr month_day_last
operator/(const chrono::month& __m, last_spec) noexcept
{ return month_day_last{__m}; }
friend constexpr month_day_last
operator/(int __m, last_spec) noexcept
{ return chrono::month(unsigned(__m)) / last; }
friend constexpr month_day_last
operator/(last_spec, const chrono::month& __m) noexcept
{ return __m / last; }
friend constexpr month_day_last
operator/(last_spec, int __m) noexcept
{ return __m / last; }
friend constexpr year_month_day_last
operator/(int __y, const month_day_last& __mdl) noexcept;
friend constexpr year_month_day_last
operator/(const month_day_last& __mdl, int __y) noexcept;
// TODO: Implement operator<<.
};
// MONTH_WEEKDAY
class month_weekday
{
private:
chrono::month _M_m;
chrono::weekday_indexed _M_wdi;
public:
constexpr
month_weekday(const chrono::month& __m,
const chrono::weekday_indexed& __wdi) noexcept
: _M_m{__m}, _M_wdi{__wdi}
{ }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::weekday_indexed
weekday_indexed() const noexcept
{ return _M_wdi; }
constexpr bool
ok() const noexcept
{ return _M_m.ok() && _M_wdi.ok(); }
friend constexpr bool
operator==(const month_weekday& __x, const month_weekday& __y) noexcept
{
return __x.month() == __y.month()
&& __x.weekday_indexed() == __y.weekday_indexed();
}
friend constexpr month_weekday
operator/(const chrono::month& __m,
const chrono::weekday_indexed& __wdi) noexcept
{ return {__m, __wdi}; }
friend constexpr month_weekday
operator/(int __m, const chrono::weekday_indexed& __wdi) noexcept
{ return chrono::month(unsigned(__m)) / __wdi; }
friend constexpr month_weekday
operator/(const chrono::weekday_indexed& __wdi,
const chrono::month& __m) noexcept
{ return __m / __wdi; }
friend constexpr month_weekday
operator/(const chrono::weekday_indexed& __wdi, int __m) noexcept
{ return __m / __wdi; }
friend constexpr year_month_weekday
operator/(int __y, const month_weekday& __mwd) noexcept;
friend constexpr year_month_weekday
operator/(const month_weekday& __mwd, int __y) noexcept;
// TODO: Implement operator<<.
};
// MONTH_WEEKDAY_LAST
class month_weekday_last
{
private:
chrono::month _M_m;
chrono::weekday_last _M_wdl;
public:
constexpr
month_weekday_last(const chrono::month& __m,
const chrono::weekday_last& __wdl) noexcept
:_M_m{__m}, _M_wdl{__wdl}
{ }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::weekday_last
weekday_last() const noexcept
{ return _M_wdl; }
constexpr bool
ok() const noexcept
{ return _M_m.ok() && _M_wdl.ok(); }
friend constexpr bool
operator==(const month_weekday_last& __x,
const month_weekday_last& __y) noexcept
{
return __x.month() == __y.month()
&& __x.weekday_last() == __y.weekday_last();
}
friend constexpr month_weekday_last
operator/(const chrono::month& __m,
const chrono::weekday_last& __wdl) noexcept
{ return {__m, __wdl}; }
friend constexpr month_weekday_last
operator/(int __m, const chrono::weekday_last& __wdl) noexcept
{ return chrono::month(unsigned(__m)) / __wdl; }
friend constexpr month_weekday_last
operator/(const chrono::weekday_last& __wdl,
const chrono::month& __m) noexcept
{ return __m / __wdl; }
friend constexpr month_weekday_last
operator/(const chrono::weekday_last& __wdl, int __m) noexcept
{ return chrono::month(unsigned(__m)) / __wdl; }
friend constexpr year_month_weekday_last
operator/(int __y, const month_weekday_last& __mwdl) noexcept;
friend constexpr year_month_weekday_last
operator/(const month_weekday_last& __mwdl, int __y) noexcept;
// TODO: Implement operator<<.
};
// YEAR_MONTH
namespace __detail
{
// [time.cal.ym], [time.cal.ymd], etc constrain the 'months'-based
// addition/subtraction operator overloads like so:
//
// Constraints: if the argument supplied by the caller for the months
// parameter is convertible to years, its implicit conversion sequence
// to years is worse than its implicit conversion sequence to months.
//
// We realize this constraint by templatizing the 'months'-based
// overloads (using a dummy defaulted template parameter), so that
// overload resolution doesn't select the 'months'-based overload unless
// the implicit conversion sequence to 'months' is better than that to
// 'years'.
using __months_years_conversion_disambiguator = void;
}
class year_month
{
private:
chrono::year _M_y;
chrono::month _M_m;
public:
year_month() = default;
constexpr
year_month(const chrono::year& __y, const chrono::month& __m) noexcept
: _M_y{__y}, _M_m{__m}
{ }
constexpr chrono::year
year() const noexcept
{ return _M_y; }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month&
operator+=(const months& __dm) noexcept
{
*this = *this + __dm;
return *this;
}
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month&
operator-=(const months& __dm) noexcept
{
*this = *this - __dm;
return *this;
}
constexpr year_month&
operator+=(const years& __dy) noexcept
{
*this = *this + __dy;
return *this;
}
constexpr year_month&
operator-=(const years& __dy) noexcept
{
*this = *this - __dy;
return *this;
}
constexpr bool
ok() const noexcept
{ return _M_y.ok() && _M_m.ok(); }
friend constexpr bool
operator==(const year_month& __x, const year_month& __y) noexcept
{ return __x.year() == __y.year() && __x.month() == __y.month(); }
friend constexpr strong_ordering
operator<=>(const year_month& __x, const year_month& __y) noexcept
= default;
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month
operator+(const year_month& __ym, const months& __dm) noexcept
{
// TODO: Optimize?
auto __m = __ym.month() + __dm;
auto __i = int(unsigned(__ym.month())) - 1 + __dm.count();
auto __y = (__i < 0
? __ym.year() + years{(__i - 11) / 12}
: __ym.year() + years{__i / 12});
return __y / __m;
}
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month
operator+(const months& __dm, const year_month& __ym) noexcept
{ return __ym + __dm; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month
operator-(const year_month& __ym, const months& __dm) noexcept
{ return __ym + -__dm; }
friend constexpr months
operator-(const year_month& __x, const year_month& __y) noexcept
{
return (__x.year() - __y.year()
+ months{static_cast<int>(unsigned{__x.month()})
- static_cast<int>(unsigned{__y.month()})});
}
friend constexpr year_month
operator+(const year_month& __ym, const years& __dy) noexcept
{ return (__ym.year() + __dy) / __ym.month(); }
friend constexpr year_month
operator+(const years& __dy, const year_month& __ym) noexcept
{ return __ym + __dy; }
friend constexpr year_month
operator-(const year_month& __ym, const years& __dy) noexcept
{ return __ym + -__dy; }
friend constexpr year_month
operator/(const chrono::year& __y, const chrono::month& __m) noexcept
{ return {__y, __m}; }
friend constexpr year_month
operator/(const chrono::year& __y, int __m) noexcept
{ return {__y, chrono::month(unsigned(__m))}; }
friend constexpr year_month_day
operator/(const year_month& __ym, int __d) noexcept;
friend constexpr year_month_day_last
operator/(const year_month& __ym, last_spec) noexcept;
// TODO: Implement operator<<, from_stream.
};
// YEAR_MONTH_DAY
class year_month_day
{
private:
chrono::year _M_y;
chrono::month _M_m;
chrono::day _M_d;
static constexpr year_month_day _S_from_days(const days& __dp) noexcept;
constexpr days _M_days_since_epoch() const noexcept;
public:
year_month_day() = default;
constexpr
year_month_day(const chrono::year& __y, const chrono::month& __m,
const chrono::day& __d) noexcept
: _M_y{__y}, _M_m{__m}, _M_d{__d}
{ }
constexpr
year_month_day(const year_month_day_last& __ymdl) noexcept;
constexpr
year_month_day(const sys_days& __dp) noexcept
: year_month_day(_S_from_days(__dp.time_since_epoch()))
{ }
explicit constexpr
year_month_day(const local_days& __dp) noexcept
: year_month_day(sys_days{__dp.time_since_epoch()})
{ }
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_day&
operator+=(const months& __m) noexcept
{
*this = *this + __m;
return *this;
}
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_day&
operator-=(const months& __m) noexcept
{
*this = *this - __m;
return *this;
}
constexpr year_month_day&
operator+=(const years& __y) noexcept
{
*this = *this + __y;
return *this;
}
constexpr year_month_day&
operator-=(const years& __y) noexcept
{
*this = *this - __y;
return *this;
}
constexpr chrono::year
year() const noexcept
{ return _M_y; }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::day
day() const noexcept
{ return _M_d; }
constexpr
operator sys_days() const noexcept
{ return sys_days{_M_days_since_epoch()}; }
explicit constexpr
operator local_days() const noexcept
{ return local_days{sys_days{*this}.time_since_epoch()}; }
constexpr bool ok() const noexcept;
friend constexpr bool
operator==(const year_month_day& __x, const year_month_day& __y) noexcept
{
return __x.year() == __y.year()
&& __x.month() == __y.month()
&& __x.day() == __y.day();
}
friend constexpr strong_ordering
operator<=>(const year_month_day& __x, const year_month_day& __y) noexcept
= default;
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day
operator+(const year_month_day& __ymd, const months& __dm) noexcept
{ return (__ymd.year() / __ymd.month() + __dm) / __ymd.day(); }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day
operator+(const months& __dm, const year_month_day& __ymd) noexcept
{ return __ymd + __dm; }
friend constexpr year_month_day
operator+(const year_month_day& __ymd, const years& __dy) noexcept
{ return (__ymd.year() + __dy) / __ymd.month() / __ymd.day(); }
friend constexpr year_month_day
operator+(const years& __dy, const year_month_day& __ymd) noexcept
{ return __ymd + __dy; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day
operator-(const year_month_day& __ymd, const months& __dm) noexcept
{ return __ymd + -__dm; }
friend constexpr year_month_day
operator-(const year_month_day& __ymd, const years& __dy) noexcept
{ return __ymd + -__dy; }
friend constexpr year_month_day
operator/(const year_month& __ym, const chrono::day& __d) noexcept
{ return {__ym.year(), __ym.month(), __d}; }
friend constexpr year_month_day
operator/(const year_month& __ym, int __d) noexcept
{ return __ym / chrono::day{unsigned(__d)}; }
friend constexpr year_month_day
operator/(const chrono::year& __y, const month_day& __md) noexcept
{ return __y / __md.month() / __md.day(); }
friend constexpr year_month_day
operator/(int __y, const month_day& __md) noexcept
{ return chrono::year{__y} / __md; }
friend constexpr year_month_day
operator/(const month_day& __md, const chrono::year& __y) noexcept
{ return __y / __md; }
friend constexpr year_month_day
operator/(const month_day& __md, int __y) noexcept
{ return chrono::year(__y) / __md; }
// TODO: Implement operator<<, from_stream.
};
// Construct from days since 1970/01/01.
// Proposition 6.3 of Neri and Schneider,
// "Euclidean Affine Functions and Applications to Calendar Algorithms".
// https://arxiv.org/abs/2102.06959
constexpr year_month_day
year_month_day::_S_from_days(const days& __dp) noexcept
{
constexpr auto __z2 = static_cast<uint32_t>(-1468000);
constexpr auto __r2_e3 = static_cast<uint32_t>(536895458);
const auto __r0 = static_cast<uint32_t>(__dp.count()) + __r2_e3;
const auto __n1 = 4 * __r0 + 3;
const auto __q1 = __n1 / 146097;
const auto __r1 = __n1 % 146097 / 4;
constexpr auto __p32 = static_cast<uint64_t>(1) << 32;
const auto __n2 = 4 * __r1 + 3;
const auto __u2 = static_cast<uint64_t>(2939745) * __n2;
const auto __q2 = static_cast<uint32_t>(__u2 / __p32);
const auto __r2 = static_cast<uint32_t>(__u2 % __p32) / 2939745 / 4;
constexpr auto __p16 = static_cast<uint32_t>(1) << 16;
const auto __n3 = 2141 * __r2 + 197913;
const auto __q3 = __n3 / __p16;
const auto __r3 = __n3 % __p16 / 2141;
const auto __y0 = 100 * __q1 + __q2;
const auto __m0 = __q3;
const auto __d0 = __r3;
const auto __j = __r2 >= 306;
const auto __y1 = __y0 + __j;
const auto __m1 = __j ? __m0 - 12 : __m0;
const auto __d1 = __d0 + 1;
return year_month_day{chrono::year{static_cast<int>(__y1 + __z2)},
chrono::month{__m1}, chrono::day{__d1}};
}
// Days since 1970/01/01.
// Proposition 6.2 of Neri and Schneider,
// "Euclidean Affine Functions and Applications to Calendar Algorithms".
// https://arxiv.org/abs/2102.06959
constexpr days
year_month_day::_M_days_since_epoch() const noexcept
{
auto constexpr __z2 = static_cast<uint32_t>(-1468000);
auto constexpr __r2_e3 = static_cast<uint32_t>(536895458);
const auto __y1 = static_cast<uint32_t>(static_cast<int>(_M_y)) - __z2;
const auto __m1 = static_cast<uint32_t>(static_cast<unsigned>(_M_m));
const auto __d1 = static_cast<uint32_t>(static_cast<unsigned>(_M_d));
const auto __j = static_cast<uint32_t>(__m1 < 3);
const auto __y0 = __y1 - __j;
const auto __m0 = __j ? __m1 + 12 : __m1;
const auto __d0 = __d1 - 1;
const auto __q1 = __y0 / 100;
const auto __yc = 1461 * __y0 / 4 - __q1 + __q1 / 4;
const auto __mc = (979 *__m0 - 2919) / 32;
const auto __dc = __d0;
return days{static_cast<int32_t>(__yc + __mc + __dc - __r2_e3)};
}
// YEAR_MONTH_DAY_LAST
class year_month_day_last
{
private:
chrono::year _M_y;
chrono::month_day_last _M_mdl;
public:
constexpr
year_month_day_last(const chrono::year& __y,
const chrono::month_day_last& __mdl) noexcept
: _M_y{__y}, _M_mdl{__mdl}
{ }
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_day_last&
operator+=(const months& __m) noexcept
{
*this = *this + __m;
return *this;
}
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_day_last&
operator-=(const months& __m) noexcept
{
*this = *this - __m;
return *this;
}
constexpr year_month_day_last&
operator+=(const years& __y) noexcept
{
*this = *this + __y;
return *this;
}
constexpr year_month_day_last&
operator-=(const years& __y) noexcept
{
*this = *this - __y;
return *this;
}
constexpr chrono::year
year() const noexcept
{ return _M_y; }
constexpr chrono::month
month() const noexcept
{ return _M_mdl.month(); }
constexpr chrono::month_day_last
month_day_last() const noexcept
{ return _M_mdl; }
// Return A day representing the last day of this year, month pair.
constexpr chrono::day
day() const noexcept
{
const auto __m = static_cast<unsigned>(month());
// Excluding February, the last day of month __m is either 30 or 31 or,
// in another words, it is 30 + b = 30 | b, where b is in {0, 1}.
// If __m in {1, 3, 4, 5, 6, 7}, then b is 1 if, and only if __m is odd.
// Hence, b = __m & 1 = (__m ^ 0) & 1.
// If __m in {8, 9, 10, 11, 12}, then b is 1 if, and only if __m is even.
// Hence, b = (__m ^ 1) & 1.
// Therefore, b = (__m ^ c) & 1, where c = 0, if __m < 8, or c = 1 if
// __m >= 8, that is, c = __m >> 3.
// The above mathematically justifies this implementation whose
// performance does not depend on look-up tables being on the L1 cache.
return chrono::day{__m != 2 ? ((__m ^ (__m >> 3)) & 1) | 30
: _M_y.is_leap() ? 29 : 28};
}
constexpr
operator sys_days() const noexcept
{ return sys_days{year() / month() / day()}; }
explicit constexpr
operator local_days() const noexcept
{ return local_days{sys_days{*this}.time_since_epoch()}; }
constexpr bool
ok() const noexcept
{ return _M_y.ok() && _M_mdl.ok(); }
friend constexpr bool
operator==(const year_month_day_last& __x,
const year_month_day_last& __y) noexcept
{
return __x.year() == __y.year()
&& __x.month_day_last() == __y.month_day_last();
}
friend constexpr strong_ordering
operator<=>(const year_month_day_last& __x,
const year_month_day_last& __y) noexcept
= default;
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day_last
operator+(const year_month_day_last& __ymdl,
const months& __dm) noexcept
{ return (__ymdl.year() / __ymdl.month() + __dm) / last; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day_last
operator+(const months& __dm,
const year_month_day_last& __ymdl) noexcept
{ return __ymdl + __dm; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_day_last
operator-(const year_month_day_last& __ymdl,
const months& __dm) noexcept
{ return __ymdl + -__dm; }
friend constexpr year_month_day_last
operator+(const year_month_day_last& __ymdl,
const years& __dy) noexcept
{ return {__ymdl.year() + __dy, __ymdl.month_day_last()}; }
friend constexpr year_month_day_last
operator+(const years& __dy,
const year_month_day_last& __ymdl) noexcept
{ return __ymdl + __dy; }
friend constexpr year_month_day_last
operator-(const year_month_day_last& __ymdl,
const years& __dy) noexcept
{ return __ymdl + -__dy; }
friend constexpr year_month_day_last
operator/(const year_month& __ym, last_spec) noexcept
{ return {__ym.year(), chrono::month_day_last{__ym.month()}}; }
friend constexpr year_month_day_last
operator/(const chrono::year& __y,
const chrono::month_day_last& __mdl) noexcept
{ return {__y, __mdl}; }
friend constexpr year_month_day_last
operator/(int __y, const chrono::month_day_last& __mdl) noexcept
{ return chrono::year(__y) / __mdl; }
friend constexpr year_month_day_last
operator/(const chrono::month_day_last& __mdl,
const chrono::year& __y) noexcept
{ return __y / __mdl; }
friend constexpr year_month_day_last
operator/(const chrono::month_day_last& __mdl, int __y) noexcept
{ return chrono::year(__y) / __mdl; }
// TODO: Implement operator<<.
};
// year_month_day ctor from year_month_day_last
constexpr
year_month_day::year_month_day(const year_month_day_last& __ymdl) noexcept
: _M_y{__ymdl.year()}, _M_m{__ymdl.month()}, _M_d{__ymdl.day()}
{ }
constexpr bool
year_month_day::ok() const noexcept
{
if (!_M_y.ok() || !_M_m.ok())
return false;
return chrono::day{1} <= _M_d && _M_d <= (_M_y / _M_m / last).day();
}
// YEAR_MONTH_WEEKDAY
class year_month_weekday
{
private:
chrono::year _M_y;
chrono::month _M_m;
chrono::weekday_indexed _M_wdi;
static constexpr year_month_weekday
_S_from_sys_days(const sys_days& __dp)
{
year_month_day __ymd{__dp};
chrono::weekday __wd{__dp};
auto __index = __wd[(unsigned{__ymd.day()} - 1) / 7 + 1];
return {__ymd.year(), __ymd.month(), __index};
}
public:
year_month_weekday() = default;
constexpr
year_month_weekday(const chrono::year& __y, const chrono::month& __m,
const chrono::weekday_indexed& __wdi) noexcept
: _M_y{__y}, _M_m{__m}, _M_wdi{__wdi}
{ }
constexpr
year_month_weekday(const sys_days& __dp) noexcept
: year_month_weekday{_S_from_sys_days(__dp)}
{ }
explicit constexpr
year_month_weekday(const local_days& __dp) noexcept
: year_month_weekday{sys_days{__dp.time_since_epoch()}}
{ }
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_weekday&
operator+=(const months& __m) noexcept
{
*this = *this + __m;
return *this;
}
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_weekday&
operator-=(const months& __m) noexcept
{
*this = *this - __m;
return *this;
}
constexpr year_month_weekday&
operator+=(const years& __y) noexcept
{
*this = *this + __y;
return *this;
}
constexpr year_month_weekday&
operator-=(const years& __y) noexcept
{
*this = *this - __y;
return *this;
}
constexpr chrono::year
year() const noexcept
{ return _M_y; }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::weekday
weekday() const noexcept
{ return _M_wdi.weekday(); }
constexpr unsigned
index() const noexcept
{ return _M_wdi.index(); }
constexpr chrono::weekday_indexed
weekday_indexed() const noexcept
{ return _M_wdi; }
constexpr
operator sys_days() const noexcept
{
auto __d = sys_days{year() / month() / 1};
return __d + (weekday() - chrono::weekday(__d)
+ days{(static_cast<int>(index())-1)*7});
}
explicit constexpr
operator local_days() const noexcept
{ return local_days{sys_days{*this}.time_since_epoch()}; }
constexpr bool
ok() const noexcept
{
if (!_M_y.ok() || !_M_m.ok() || !_M_wdi.ok())
return false;
if (_M_wdi.index() <= 4)
return true;
days __d = (_M_wdi.weekday()
- chrono::weekday{sys_days{_M_y / _M_m / 1}}
+ days((_M_wdi.index()-1)*7 + 1));
__glibcxx_assert(__d.count() >= 1);
return __d.count() <= unsigned{(_M_y / _M_m / last).day()};
}
friend constexpr bool
operator==(const year_month_weekday& __x,
const year_month_weekday& __y) noexcept
{
return __x.year() == __y.year()
&& __x.month() == __y.month()
&& __x.weekday_indexed() == __y.weekday_indexed();
}
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday
operator+(const year_month_weekday& __ymwd, const months& __dm) noexcept
{
return ((__ymwd.year() / __ymwd.month() + __dm)
/ __ymwd.weekday_indexed());
}
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday
operator+(const months& __dm, const year_month_weekday& __ymwd) noexcept
{ return __ymwd + __dm; }
friend constexpr year_month_weekday
operator+(const year_month_weekday& __ymwd, const years& __dy) noexcept
{ return {__ymwd.year() + __dy, __ymwd.month(), __ymwd.weekday_indexed()}; }
friend constexpr year_month_weekday
operator+(const years& __dy, const year_month_weekday& __ymwd) noexcept
{ return __ymwd + __dy; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday
operator-(const year_month_weekday& __ymwd, const months& __dm) noexcept
{ return __ymwd + -__dm; }
friend constexpr year_month_weekday
operator-(const year_month_weekday& __ymwd, const years& __dy) noexcept
{ return __ymwd + -__dy; }
friend constexpr year_month_weekday
operator/(const year_month& __ym,
const chrono::weekday_indexed& __wdi) noexcept
{ return {__ym.year(), __ym.month(), __wdi}; }
friend constexpr year_month_weekday
operator/(const chrono::year& __y, const month_weekday& __mwd) noexcept
{ return {__y, __mwd.month(), __mwd.weekday_indexed()}; }
friend constexpr year_month_weekday
operator/(int __y, const month_weekday& __mwd) noexcept
{ return chrono::year(__y) / __mwd; }
friend constexpr year_month_weekday
operator/(const month_weekday& __mwd, const chrono::year& __y) noexcept
{ return __y / __mwd; }
friend constexpr year_month_weekday
operator/(const month_weekday& __mwd, int __y) noexcept
{ return chrono::year(__y) / __mwd; }
// TODO: Implement operator<<.
};
// YEAR_MONTH_WEEKDAY_LAST
class year_month_weekday_last
{
private:
chrono::year _M_y;
chrono::month _M_m;
chrono::weekday_last _M_wdl;
public:
constexpr
year_month_weekday_last(const chrono::year& __y, const chrono::month& __m,
const chrono::weekday_last& __wdl) noexcept
: _M_y{__y}, _M_m{__m}, _M_wdl{__wdl}
{ }
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_weekday_last&
operator+=(const months& __m) noexcept
{
*this = *this + __m;
return *this;
}
template<typename = __detail::__months_years_conversion_disambiguator>
constexpr year_month_weekday_last&
operator-=(const months& __m) noexcept
{
*this = *this - __m;
return *this;
}
constexpr year_month_weekday_last&
operator+=(const years& __y) noexcept
{
*this = *this + __y;
return *this;
}
constexpr year_month_weekday_last&
operator-=(const years& __y) noexcept
{
*this = *this - __y;
return *this;
}
constexpr chrono::year
year() const noexcept
{ return _M_y; }
constexpr chrono::month
month() const noexcept
{ return _M_m; }
constexpr chrono::weekday
weekday() const noexcept
{ return _M_wdl.weekday(); }
constexpr chrono::weekday_last
weekday_last() const noexcept
{ return _M_wdl; }
constexpr
operator sys_days() const noexcept
{
const auto __d = sys_days{_M_y / _M_m / last};
return sys_days{(__d - (chrono::weekday{__d}
- _M_wdl.weekday())).time_since_epoch()};
}
explicit constexpr
operator local_days() const noexcept
{ return local_days{sys_days{*this}.time_since_epoch()}; }
constexpr bool
ok() const noexcept
{ return _M_y.ok() && _M_m.ok() && _M_wdl.ok(); }
friend constexpr bool
operator==(const year_month_weekday_last& __x,
const year_month_weekday_last& __y) noexcept
{
return __x.year() == __y.year()
&& __x.month() == __y.month()
&& __x.weekday_last() == __y.weekday_last();
}
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday_last
operator+(const year_month_weekday_last& __ymwdl,
const months& __dm) noexcept
{
return ((__ymwdl.year() / __ymwdl.month() + __dm)
/ __ymwdl.weekday_last());
}
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday_last
operator+(const months& __dm,
const year_month_weekday_last& __ymwdl) noexcept
{ return __ymwdl + __dm; }
friend constexpr year_month_weekday_last
operator+(const year_month_weekday_last& __ymwdl,
const years& __dy) noexcept
{ return {__ymwdl.year() + __dy, __ymwdl.month(), __ymwdl.weekday_last()}; }
friend constexpr year_month_weekday_last
operator+(const years& __dy,
const year_month_weekday_last& __ymwdl) noexcept
{ return __ymwdl + __dy; }
template<typename = __detail::__months_years_conversion_disambiguator>
friend constexpr year_month_weekday_last
operator-(const year_month_weekday_last& __ymwdl,
const months& __dm) noexcept
{ return __ymwdl + -__dm; }
friend constexpr year_month_weekday_last
operator-(const year_month_weekday_last& __ymwdl,
const years& __dy) noexcept
{ return __ymwdl + -__dy; }
friend constexpr year_month_weekday_last
operator/(const year_month& __ym,
const chrono::weekday_last& __wdl) noexcept
{ return {__ym.year(), __ym.month(), __wdl}; }
friend constexpr year_month_weekday_last
operator/(const chrono::year& __y,
const chrono::month_weekday_last& __mwdl) noexcept
{ return {__y, __mwdl.month(), __mwdl.weekday_last()}; }
friend constexpr year_month_weekday_last
operator/(int __y, const chrono::month_weekday_last& __mwdl) noexcept
{ return chrono::year(__y) / __mwdl; }
friend constexpr year_month_weekday_last
operator/(const chrono::month_weekday_last& __mwdl,
const chrono::year& __y) noexcept
{ return __y / __mwdl; }
friend constexpr year_month_weekday_last
operator/(const chrono::month_weekday_last& __mwdl, int __y) noexcept
{ return chrono::year(__y) / __mwdl; }
// TODO: Implement operator<<.
};
// HH_MM_SS
namespace __detail
{
consteval long long
__pow10(unsigned __n)
{
long long __r = 1;
while (__n-- > 0)
__r *= 10;
return __r;
}
}
template<typename _Duration>
class hh_mm_ss
{
private:
static constexpr int
_S_fractional_width()
{
int __multiplicity_2 = 0;
int __multiplicity_5 = 0;
auto __den = _Duration::period::den;
while ((__den % 2) == 0)
{
++__multiplicity_2;
__den /= 2;
}
while ((__den % 5) == 0)
{
++__multiplicity_5;
__den /= 5;
}
if (__den != 1)
return 6;
int __width = (__multiplicity_2 > __multiplicity_5
? __multiplicity_2 : __multiplicity_5);
if (__width > 18)
__width = 18;
return __width;
}
constexpr
hh_mm_ss(_Duration __d, bool __is_neg)
: _M_is_neg(__is_neg),
_M_h (duration_cast<chrono::hours>(__d)),
_M_m (duration_cast<chrono::minutes>(__d - hours())),
_M_s (duration_cast<chrono::seconds>(__d - hours() - minutes()))
{
auto __ss = __d - hours() - minutes() - seconds();
if constexpr (treat_as_floating_point_v<typename precision::rep>)
_M_ss = __ss;
else
_M_ss = duration_cast<precision>(__ss);
}
static constexpr _Duration
_S_abs(_Duration __d)
{
if constexpr (numeric_limits<typename _Duration::rep>::is_signed)
return chrono::abs(__d);
else
return __d;
}
public:
static constexpr unsigned fractional_width = {_S_fractional_width()};
using precision
= duration<common_type_t<typename _Duration::rep,
chrono::seconds::rep>,
ratio<1, __detail::__pow10(fractional_width)>>;
constexpr
hh_mm_ss() noexcept
: hh_mm_ss{_Duration::zero()}
{ }
constexpr explicit
hh_mm_ss(_Duration __d)
: hh_mm_ss(_S_abs(__d), __d < _Duration::zero())
{ }
constexpr bool
is_negative() const noexcept
{ return _M_is_neg; }
constexpr chrono::hours
hours() const noexcept
{ return _M_h; }
constexpr chrono::minutes
minutes() const noexcept
{ return _M_m; }
constexpr chrono::seconds
seconds() const noexcept
{ return _M_s; }
constexpr precision
subseconds() const noexcept
{ return _M_ss; }
constexpr explicit
operator precision() const noexcept
{ return to_duration(); }
constexpr precision
to_duration() const noexcept
{
if (_M_is_neg)
return -(_M_h + _M_m + _M_s + _M_ss);
else
return _M_h + _M_m + _M_s + _M_ss;
}
// TODO: Implement operator<<.
private:
bool _M_is_neg;
chrono::hours _M_h;
chrono::minutes _M_m;
chrono::seconds _M_s;
precision _M_ss;
};
#endif // C++20
/// @} group chrono
} // namespace chrono
#if __cplusplus > 201103L
#define __cpp_lib_chrono_udls 201304
inline namespace literals
{
/** ISO C++ 2014 namespace for suffixes for duration literals.
*
* These suffixes can be used to create `chrono::duration` values with
* tick periods of hours, minutes, seconds, milliseconds, microseconds
* or nanoseconds. For example, `std::chrono::seconds(5)` can be written
* as `5s` after making the suffix visible in the current scope.
* The suffixes can be made visible by a using-directive or
* using-declaration such as:
* - `using namespace std::chrono_literals;`
* - `using namespace std::literals;`
* - `using namespace std::chrono;`
* - `using namespace std;`
* - `using std::chrono_literals::operator""s;`
*
* The result of these suffixes on an integer literal is one of the
* standard typedefs such as `std::chrono::hours`.
* The result on a floating-point literal is a duration type with the
* specified tick period and an unspecified floating-point representation,
* for example `1.5e2ms` might be equivalent to
* `chrono::duration<long double, chrono::milli>(1.5e2)`.
*
* @ingroup chrono
*/
inline namespace chrono_literals
{
/// @addtogroup chrono
/// @{
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wliteral-suffix"
/// @cond undocumented
template<typename _Dur, char... _Digits>
constexpr _Dur __check_overflow()
{
using _Val = __parse_int::_Parse_int<_Digits...>;
constexpr typename _Dur::rep __repval = _Val::value;
static_assert(__repval >= 0 && __repval == _Val::value,
"literal value cannot be represented by duration type");
return _Dur(__repval);
}
/// @endcond
/// Literal suffix for durations representing non-integer hours
constexpr chrono::duration<long double, ratio<3600,1>>
operator""h(long double __hours)
{ return chrono::duration<long double, ratio<3600,1>>{__hours}; }
/// Literal suffix for durations of type `std::chrono::hours`
template <char... _Digits>
constexpr chrono::hours
operator""h()
{ return __check_overflow<chrono::hours, _Digits...>(); }
/// Literal suffix for durations representing non-integer minutes
constexpr chrono::duration<long double, ratio<60,1>>
operator""min(long double __mins)
{ return chrono::duration<long double, ratio<60,1>>{__mins}; }
/// Literal suffix for durations of type `std::chrono::minutes`
template <char... _Digits>
constexpr chrono::minutes
operator""min()
{ return __check_overflow<chrono::minutes, _Digits...>(); }
/// Literal suffix for durations representing non-integer seconds
constexpr chrono::duration<long double>
operator""s(long double __secs)
{ return chrono::duration<long double>{__secs}; }
/// Literal suffix for durations of type `std::chrono::seconds`
template <char... _Digits>
constexpr chrono::seconds
operator""s()
{ return __check_overflow<chrono::seconds, _Digits...>(); }
/// Literal suffix for durations representing non-integer milliseconds
constexpr chrono::duration<long double, milli>
operator""ms(long double __msecs)
{ return chrono::duration<long double, milli>{__msecs}; }
/// Literal suffix for durations of type `std::chrono::milliseconds`
template <char... _Digits>
constexpr chrono::milliseconds
operator""ms()
{ return __check_overflow<chrono::milliseconds, _Digits...>(); }
/// Literal suffix for durations representing non-integer microseconds
constexpr chrono::duration<long double, micro>
operator""us(long double __usecs)
{ return chrono::duration<long double, micro>{__usecs}; }
/// Literal suffix for durations of type `std::chrono::microseconds`
template <char... _Digits>
constexpr chrono::microseconds
operator""us()
{ return __check_overflow<chrono::microseconds, _Digits...>(); }
/// Literal suffix for durations representing non-integer nanoseconds
constexpr chrono::duration<long double, nano>
operator""ns(long double __nsecs)
{ return chrono::duration<long double, nano>{__nsecs}; }
/// Literal suffix for durations of type `std::chrono::nanoseconds`
template <char... _Digits>
constexpr chrono::nanoseconds
operator""ns()
{ return __check_overflow<chrono::nanoseconds, _Digits...>(); }
#if __cplusplus > 201703L
constexpr chrono::day
operator""d(unsigned long long __d) noexcept
{ return chrono::day{static_cast<unsigned>(__d)}; }
constexpr chrono::year
operator""y(unsigned long long __y) noexcept
{ return chrono::year{static_cast<int>(__y)}; }
#endif // C++20
#pragma GCC diagnostic pop
/// @}
} // inline namespace chrono_literals
} // inline namespace literals
namespace chrono
{
using namespace literals::chrono_literals;
} // namespace chrono
#if __cplusplus > 201703L
namespace chrono
{
/// @addtogroup chrono
/// @{
// 12/24 HOURS FUNCTIONS
constexpr bool
is_am(const hours& __h) noexcept
{ return 0h <= __h && __h <= 11h; }
constexpr bool
is_pm(const hours& __h) noexcept
{ return 12h <= __h && __h <= 23h; }
constexpr hours
make12(const hours& __h) noexcept
{
if (__h == 0h)
return 12h;
else if (__h > 12h)
return __h - 12h;
return __h;
}
constexpr hours
make24(const hours& __h, bool __is_pm) noexcept
{
if (!__is_pm)
{
if (__h == 12h)
return 0h;
else
return __h;
}
else
{
if (__h == 12h)
return __h;
else
return __h + 12h;
}
}
/// @} group chrono
} // namespace chrono
#endif
#if __cplusplus >= 201703L
namespace filesystem
{
struct __file_clock
{
using duration = chrono::nanoseconds;
using rep = duration::rep;
using period = duration::period;
using time_point = chrono::time_point<__file_clock>;
static constexpr bool is_steady = false;
static time_point
now() noexcept
{ return _S_from_sys(chrono::system_clock::now()); }
#if __cplusplus > 201703L
template<typename _Dur>
static
chrono::file_time<_Dur>
from_sys(const chrono::sys_time<_Dur>& __t) noexcept
{ return _S_from_sys(__t); }
// For internal use only
template<typename _Dur>
static
chrono::sys_time<_Dur>
to_sys(const chrono::file_time<_Dur>& __t) noexcept
{ return _S_to_sys(__t); }
#endif // C++20
private:
using __sys_clock = chrono::system_clock;
// This clock's (unspecified) epoch is 2174-01-01 00:00:00 UTC.
// A signed 64-bit duration with nanosecond resolution gives roughly
// +/- 292 years, which covers the 1901-2446 date range for ext4.
static constexpr chrono::seconds _S_epoch_diff{6437664000};
protected:
// For internal use only
template<typename _Dur>
static
chrono::time_point<__file_clock, _Dur>
_S_from_sys(const chrono::time_point<__sys_clock, _Dur>& __t) noexcept
{
using __file_time = chrono::time_point<__file_clock, _Dur>;
return __file_time{__t.time_since_epoch()} - _S_epoch_diff;
}
// For internal use only
template<typename _Dur>
static
chrono::time_point<__sys_clock, _Dur>
_S_to_sys(const chrono::time_point<__file_clock, _Dur>& __t) noexcept
{
using __sys_time = chrono::time_point<__sys_clock, _Dur>;
return __sys_time{__t.time_since_epoch()} + _S_epoch_diff;
}
};
} // namespace filesystem
#endif // C++17
#endif // C++14
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++11
#endif //_GLIBCXX_CHRONO