mtcore::calendars::systems::Egyptian Struct Reference

Represents the ancient Egyptian calendaring system. More...

#include <egyptian.hpp>

Collaboration diagram for mtcore::calendars::systems::Egyptian:

Public Types
enum class	Month {   Thoth = 1 , Phaophi , Athyr , Choiak ,   Tybi , Mechir , Phamenoth , Pharmuthi ,   Pachon , Payni , Epiphi , Mesori ,   epagomenae }

Public Member Functions
constexpr auto	operator<=> (const Egyptian &o) const noexcept
constexpr Fixed	to_fixed () const noexcept

Static Public Member Functions
static constexpr Egyptian	from_fixed (const Fixed &rdDate) noexcept

Public Attributes
AstronomicalYear	year = 0
	Year of the date.
Month	month = Month::Thoth
	MONTH of the year (1-13)
u8	day = 1
	Day of the month: 1-30 (epagomenae 1-5)

Static Public Attributes
static constexpr auto	EPOCH = EGYPTIAN_EPOCH
static constexpr std::string_view	name = "Egyptian"

Detailed Description

Represents the ancient Egyptian calendaring system.

The Egyptian calendars has 13 months, with the first 12 months being 30 days and the last month (the epagomenae) being 5 days. Note that the epagomenae (month 13) does not have a name.

Definition at line 33 of file egyptian.hpp.

Member Enumeration Documentation

Month

enum class mtcore::calendars::systems::Egyptian::Month

strong

Enumerator
Thoth
Phaophi
Athyr
Choiak
Tybi
Mechir
Phamenoth
Pharmuthi
Pachon
Payni
Epiphi
Mesori
epagomenae

Definition at line 36 of file egyptian.hpp.

                     {
      Thoth = 1,
      Phaophi,
      Athyr,
      Choiak,
      Tybi,
      Mechir,
      Phamenoth,
      Pharmuthi,
      Pachon,
      Payni,
      Epiphi,
      Mesori,
 
      epagomenae
    };

Member Function Documentation

from_fixed()

static constexpr Egyptian mtcore::calendars::systems::Egyptian::from_fixed ( const Fixed & rdDate )

inlinestaticnodiscardconstexprnoexcept

Definition at line 79 of file egyptian.hpp.

                                                                                     {
      const auto days          = rdDate.day - EPOCH;
      const auto egyptianYear  = math::floor<double, int64_t>(static_cast<double>(days) / 365.0) + 1;
      const auto egyptianMonth = math::floor<double, int64_t>(math::mod(static_cast<double>(days), 365) / 30.0) + 1;
      const auto egyptianDay   = days - 365 * (egyptianYear - 1) - 30 * (egyptianMonth - 1) + 1;
      return Egyptian{static_cast<decltype(year)>(egyptianYear), static_cast<decltype(month)>(egyptianMonth),
                      static_cast<decltype(day)>(egyptianDay)};
    }

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operator<=>()

auto mtcore::calendars::systems::Egyptian::operator<=> ( const Egyptian & o ) const

inlinenodiscardconstexprnoexcept

Definition at line 66 of file egyptian.hpp.

                                                                               {
      if (const auto c = year <=> o.year; c != std::strong_ordering::equivalent) {
        return c;
      }
      if (const auto c = month <=> o.month; c != std::strong_ordering::equivalent) {
        return c;
      }
      if (const auto c = day <=> o.day; c != std::strong_ordering::equivalent) {
        return c;
      }
      return std::strong_ordering::equivalent;
    }

to_fixed()

Fixed mtcore::calendars::systems::Egyptian::to_fixed ( ) const

inlinenodiscardconstexprnoexcept

Definition at line 88 of file egyptian.hpp.

                                                            {
      return Fixed{EPOCH + ((365 * (static_cast<i32>(year) - 1) + 30 * (static_cast<i32>(month) - 1) +
                             static_cast<i32>(day - 1)))};
    }

Member Data Documentation

day

u8 mtcore::calendars::systems::Egyptian::day = 1

Day of the month: 1-30 (epagomenae 1-5)

Definition at line 64 of file egyptian.hpp.

EPOCH

auto mtcore::calendars::systems::Egyptian::EPOCH = EGYPTIAN_EPOCH

staticconstexpr

Definition at line 34 of file egyptian.hpp.

month

Month mtcore::calendars::systems::Egyptian::month = Month::Thoth

MONTH of the year (1-13)

Definition at line 60 of file egyptian.hpp.

name

std::string_view mtcore::calendars::systems::Egyptian::name = "Egyptian"

staticconstexpr

Definition at line 35 of file egyptian.hpp.

year

AstronomicalYear mtcore::calendars::systems::Egyptian::year = 0

Year of the date.

Definition at line 56 of file egyptian.hpp.

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The documentation for this struct was generated from the following file:

• egyptian.hpp