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)
using local_time = time_point<local_t, _Duration>;
using local_seconds = local_time<seconds>;
using local_days = local_time<days>;
-#endif // C++20
- // @}
- } // namespace chrono
+ class utc_clock;
+ class tai_clock;
+ class gps_clock;
-#if __cplusplus > 201103L
+ template<typename _Duration>
+ using utc_time = time_point<utc_clock, _Duration>;
+ using utc_seconds = utc_time<seconds>;
-#define __cpp_lib_chrono_udls 201304
+ template<typename _Duration>
+ using tai_time = time_point<tai_clock, _Duration>;
+ using tai_seconds = tai_time<seconds>;
- 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
- {
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wliteral-suffix"
- /// @cond undocumented
- template<typename _Dur, char... _Digits>
- constexpr _Dur __check_overflow()
+ 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)
{
- 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);
+ if (__n >= 0)
+ return __n % __d;
+ else
+ return (__d + (__n % __d)) % __d;
}
- /// @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}; }
+ inline constexpr unsigned __days_per_month[12]
+ = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
- /// Literal suffix for durations of type `std::chrono::hours`
- template <char... _Digits>
- constexpr chrono::hours
- operator""h()
- { return __check_overflow<chrono::hours, _Digits...>(); }
+ inline constexpr unsigned __last_day[12]
+ = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+ }
- /// 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}; }
+ // DAY
- /// Literal suffix for durations of type `std::chrono::minutes`
- template <char... _Digits>
- constexpr chrono::minutes
- operator""min()
- { return __check_overflow<chrono::minutes, _Digits...>(); }
+ class day
+ {
+ private:
+ unsigned char _M_d;
- /// Literal suffix for durations representing non-integer seconds
- constexpr chrono::duration<long double>
- operator""s(long double __secs)
- { return chrono::duration<long double>{__secs}; }
+ public:
+ day() = default;
- /// Literal suffix for durations of type `std::chrono::seconds`
- template <char... _Digits>
- constexpr chrono::seconds
- operator""s()
- { return __check_overflow<chrono::seconds, _Digits...>(); }
+ explicit constexpr
+ day(unsigned __d) noexcept
+ : _M_d(__d)
+ { }
- /// 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}; }
+ constexpr day&
+ operator++() noexcept
+ {
+ ++_M_d;
+ return *this;
+ }
- /// Literal suffix for durations of type `std::chrono::milliseconds`
- template <char... _Digits>
- constexpr chrono::milliseconds
- operator""ms()
- { return __check_overflow<chrono::milliseconds, _Digits...>(); }
+ constexpr day
+ operator++(int) noexcept
+ {
+ auto __ret = *this;
+ ++(*this);
+ return __ret;
+ }
- /// 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}; }
+ constexpr day&
+ operator--() noexcept
+ {
+ --_M_d;
+ return *this;
+ }
- /// Literal suffix for durations of type `std::chrono::microseconds`
- template <char... _Digits>
- constexpr chrono::microseconds
- operator""us()
- { return __check_overflow<chrono::microseconds, _Digits...>(); }
+ constexpr day
+ operator--(int) noexcept
+ {
+ auto __ret = *this;
+ --(*this);
+ return __ret;
+ }
- /// 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}; }
+ constexpr day&
+ operator+=(const days& __d) noexcept
+ {
+ *this = *this + __d;
+ return *this;
+ }
- /// Literal suffix for durations of type `std::chrono::nanoseconds`
- template <char... _Digits>
- constexpr chrono::nanoseconds
- operator""ns()
- { return __check_overflow<chrono::nanoseconds, _Digits...>(); }
+ constexpr day&
+ operator-=(const days& __d) noexcept
+ {
+ *this = *this - __d;
+ return *this;
+ }
-#pragma GCC diagnostic pop
- } // inline namespace chrono_literals
- } // inline namespace literals
+ constexpr explicit
+ operator unsigned() const noexcept
+ { return _M_d; }
- namespace chrono
- {
- using namespace literals::chrono_literals;
- } // namespace chrono
+ 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
+ { return _M_y % 4 == 0 && (_M_y % 100 != 0 || _M_y % 400 == 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} + __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
+
+ 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; }
+
+ constexpr year_month&
+ operator+=(const months& __dm) noexcept
+ {
+ *this = *this + __dm;
+ return *this;
+ }
+
+ 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;
+
+ friend constexpr year_month
+ operator+(const year_month& __ym, const months& __dm) noexcept
+ {
+ // TODO: Optimize?
+ auto __m = __ym.month() + __dm;
+ auto __i = unsigned{__ym.month()} - 1 + __dm.count();
+ auto __y = (__i < 0
+ ? __ym.year() + years{(__i - 11) / 12}
+ : __ym.year() + years{__i / 12});
+ return __y / __m;
+ }
+
+ friend constexpr year_month
+ operator+(const months& __dm, const year_month& __ym) noexcept
+ { return __ym + __dm; }
+
+ 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()})
+ { }
+
+ constexpr year_month_day&
+ operator+=(const months& __m) noexcept
+ {
+ *this = *this + __m;
+ return *this;
+ }
+
+ 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;
+
+ friend constexpr year_month_day
+ operator+(const year_month_day& __ymd, const months& __dm) noexcept
+ { return (__ymd.year() / __ymd.month() + __dm) / __ymd.day(); }
+
+ 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; }
+
+ 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. Magic.
+ constexpr year_month_day
+ year_month_day::_S_from_days(const days& __dp) noexcept
+ {
+ const auto __z = __dp.count() + 719468;
+ const auto __era = (__z >= 0 ? __z : __z - 146096) / 146097;
+ const auto __doe = static_cast<unsigned>(__z - __era * 146097);
+ const auto __yoe
+ = (__doe - __doe / 1460 + __doe / 36524 - __doe / 146096) / 365;
+ const auto __y = static_cast<days::rep>(__yoe) + __era * 400;
+ const auto __doy = __doe - (365 * __yoe + __yoe / 4 - __yoe / 100);
+ const auto __mp = (5 * __doy + 2) / 153;
+ const auto __d = __doy - (153 * __mp + 2) / 5 + 1;
+ const auto __m = __mp < 10 ? __mp + 3 : __mp - 9;
+ return year_month_day{chrono::year(__y + (__m <= 2)),
+ chrono::month(__m), chrono::day(__d)};
+ }
+
+ // Days since 1970/01/01. Magic.
+ constexpr days
+ year_month_day::_M_days_since_epoch() const noexcept
+ {
+ const auto __y = static_cast<int>(_M_y) - (_M_m <= February);
+ const auto __m = static_cast<unsigned>(_M_m);
+ const auto __d = static_cast<unsigned>(_M_d);
+ const auto __era = (__y >= 0 ? __y : __y - 399) / 400;
+ // Year of "era" [0, 399].
+ const auto __yoe = static_cast<unsigned>(__y - __era * 400);
+ // Day of year [0, 365].
+ const auto __doy = (153 * (__m > 2 ? __m - 3 : __m + 9) + 2) / 5 + __d - 1;
+ // Day of "era" [0, 146096].
+ const auto __doe = __yoe * 365 + __yoe / 4 - __yoe / 100 + __doy;
+ const auto __days = __era * 146097 + static_cast<int>(__doe) - 719468;
+ return days{__days};
+ }
+
+ // 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}
+ { }
+
+ constexpr year_month_day_last&
+ operator+=(const months& __m) noexcept
+ {
+ *this = *this + __m;
+ return *this;
+ }
+
+ 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
+ {
+ if (!_M_mdl.ok() || (month() == February && _M_y.is_leap()))
+ return chrono::day{29};
+ return chrono::day{__detail::__last_day[unsigned(month()) - 1]};
+ }
+
+ 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;
+
+ friend constexpr year_month_day_last
+ operator+(const year_month_day_last& __ymdl,
+ const months& __dm) noexcept
+ { return (__ymdl.year() / __ymdl.month() + __dm) / last; }
+
+ friend constexpr year_month_day_last
+ operator+(const months& __dm,
+ const year_month_day_last& __ymdl) noexcept
+ { return __ymdl + __dm; }
+
+ 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()}}
+ { }
+
+ constexpr year_month_weekday&
+ operator+=(const months& __m) noexcept
+ {
+ *this = *this + __m;
+ return *this;
+ }
+
+ 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{(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 >= 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() == __y.weekday();
+ }
+
+ friend constexpr year_month_weekday
+ operator+(const year_month_weekday& __ymwd, const months& __dm) noexcept
+ { return (__ymwd.year() / __ymwd.month() + __dm) / __ymwd.weekday_indexed(); }
+
+ 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; }
+
+ 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}
+ { }
+
+ constexpr year_month_weekday_last&
+ operator+=(const months& __m) noexcept
+ {
+ *this = *this + __m;
+ return *this;
+ }
+
+ 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();
+ }
+
+ 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(); }
+
+ 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; }
+
+ 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;
+ }
+
+ 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) noexcept
+ : _M_is_neg (__d < _Duration::zero()),
+ _M_h (duration_cast<chrono::hours>(abs(__d))),
+ _M_m (duration_cast<chrono::minutes>(abs(__d) - hours())),
+ _M_s (duration_cast<chrono::seconds>(abs(__d) - hours() - minutes()))
+ {
+ if constexpr (treat_as_floating_point_v<typename precision::rep>)
+ _M_ss = abs(__d) - hours() - minutes() - seconds();
+ else
+ _M_ss = duration_cast<precision>(abs(__d) - hours()
+ - minutes() - seconds());
+ }
+
+ 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
+
+ // @}
+ } // 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
+ {
+#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
+ {
+ // 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;
+ }
+ }
+ }
+#endif
#if __cplusplus >= 201703L
namespace filesystem
projects / gcc.git / commitdiff