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date.h
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#ifndef DATE_H
#define DATE_H
// The MIT License (MIT)
//
// Copyright (c) 2015, 2016 Howard Hinnant
// Copyright (c) 2016 Adrian Colomitchi
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// Our apologies. When the previous paragraph was written, lowercase had not yet
// been invented (that would involve another several millennia of evolution).
// We did not mean to shout.
#include <algorithm>
#include <cctype>
#include <chrono>
#if !(__cplusplus >= 201402)
# include <cmath>
#endif
#include <cstdint>
#include <cstdlib>
#include <ctime>
#include <ios>
#include <istream>
#include <iterator>
#include <limits>
#include <locale>
#include <ostream>
#include <ratio>
#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>
#include <type_traits>
namespace date
{
//---------------+
// Configuration |
//---------------+
// MSVC's constexpr support is still a WIP, even in VS2015.
// Fall back to a lesser mode to support it.
// TODO: Remove this or retest later once MSVC's constexpr improves.
#if defined(_MSC_VER) && _MSC_VER <= 1900 && ! defined(__clang__)
// MS cl compiler pre VS2017
# define CONSTDATA const
# define CONSTCD11
# define CONSTCD14
# define NOEXCEPT _NOEXCEPT
#elif __cplusplus >= 201402
// C++14
# define CONSTDATA constexpr const
# define CONSTCD11 constexpr
# define CONSTCD14 constexpr
# define NOEXCEPT noexcept
#else
// C++11
# define CONSTDATA constexpr const
# define CONSTCD11 constexpr
# define CONSTCD14
# define NOEXCEPT noexcept
#endif
//-----------+
// Interface |
//-----------+
// durations
using days = std::chrono::duration
<int64_t, std::ratio_multiply<std::ratio<24>, std::chrono::hours::period>>;
using weeks = std::chrono::duration
<int, std::ratio_multiply<std::ratio<7>, days::period>>;
using years = std::chrono::duration
<int, std::ratio_multiply<std::ratio<146097, 400>, days::period>>;
using months = std::chrono::duration
<int, std::ratio_divide<years::period, std::ratio<12>>>;
// time_point
template <class Duration>
using sys_time = std::chrono::time_point<std::chrono::system_clock, Duration>;
using sys_days = sys_time<days>;
using sys_seconds = sys_time<std::chrono::seconds>;
struct local_t {};
template <class Duration>
using local_time = std::chrono::time_point<local_t, Duration>;
using local_seconds = local_time<std::chrono::seconds>;
using local_days = local_time<days>;
// types
struct last_spec
{
explicit last_spec() = default;
};
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;
// date composition operators
CONSTCD11 year_month operator/(const year& y, const month& m) NOEXCEPT;
CONSTCD11 year_month operator/(const year& y, int m) NOEXCEPT;
CONSTCD11 month_day operator/(const day& d, const month& m) NOEXCEPT;
CONSTCD11 month_day operator/(const day& d, int m) NOEXCEPT;
CONSTCD11 month_day operator/(const month& m, const day& d) NOEXCEPT;
CONSTCD11 month_day operator/(const month& m, int d) NOEXCEPT;
CONSTCD11 month_day operator/(int m, const day& d) NOEXCEPT;
CONSTCD11 month_day_last operator/(const month& m, last_spec) NOEXCEPT;
CONSTCD11 month_day_last operator/(int m, last_spec) NOEXCEPT;
CONSTCD11 month_day_last operator/(last_spec, const month& m) NOEXCEPT;
CONSTCD11 month_day_last operator/(last_spec, int m) NOEXCEPT;
CONSTCD11 month_weekday operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT;
CONSTCD11 month_weekday operator/(int m, const weekday_indexed& wdi) NOEXCEPT;
CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT;
CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, int m) NOEXCEPT;
CONSTCD11 month_weekday_last operator/(const month& m, const weekday_last& wdl) NOEXCEPT;
CONSTCD11 month_weekday_last operator/(int m, const weekday_last& wdl) NOEXCEPT;
CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, const month& m) NOEXCEPT;
CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, int m) NOEXCEPT;
CONSTCD11 year_month_day operator/(const year_month& ym, const day& d) NOEXCEPT;
CONSTCD11 year_month_day operator/(const year_month& ym, int d) NOEXCEPT;
CONSTCD11 year_month_day operator/(const year& y, const month_day& md) NOEXCEPT;
CONSTCD11 year_month_day operator/(int y, const month_day& md) NOEXCEPT;
CONSTCD11 year_month_day operator/(const month_day& md, const year& y) NOEXCEPT;
CONSTCD11 year_month_day operator/(const month_day& md, int y) NOEXCEPT;
CONSTCD11
year_month_day_last operator/(const year_month& ym, last_spec) NOEXCEPT;
CONSTCD11
year_month_day_last operator/(const year& y, const month_day_last& mdl) NOEXCEPT;
CONSTCD11
year_month_day_last operator/(int y, const month_day_last& mdl) NOEXCEPT;
CONSTCD11
year_month_day_last operator/(const month_day_last& mdl, const year& y) NOEXCEPT;
CONSTCD11
year_month_day_last operator/(const month_day_last& mdl, int y) NOEXCEPT;
CONSTCD11
year_month_weekday
operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT;
CONSTCD11
year_month_weekday
operator/(const year& y, const month_weekday& mwd) NOEXCEPT;
CONSTCD11
year_month_weekday
operator/(int y, const month_weekday& mwd) NOEXCEPT;
CONSTCD11
year_month_weekday
operator/(const month_weekday& mwd, const year& y) NOEXCEPT;
CONSTCD11
year_month_weekday
operator/(const month_weekday& mwd, int y) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator/(int y, const month_weekday_last& mwdl) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator/(const month_weekday_last& mwdl, int y) NOEXCEPT;
// Detailed interface
// day
class day
{
unsigned char d_;
public:
day() = default;
explicit CONSTCD11 day(unsigned d) NOEXCEPT;
CONSTCD14 day& operator++() NOEXCEPT;
CONSTCD14 day operator++(int) NOEXCEPT;
CONSTCD14 day& operator--() NOEXCEPT;
CONSTCD14 day operator--(int) NOEXCEPT;
CONSTCD14 day& operator+=(const days& d) NOEXCEPT;
CONSTCD14 day& operator-=(const days& d) NOEXCEPT;
CONSTCD11 explicit operator unsigned() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const day& x, const day& y) NOEXCEPT;
CONSTCD11 bool operator!=(const day& x, const day& y) NOEXCEPT;
CONSTCD11 bool operator< (const day& x, const day& y) NOEXCEPT;
CONSTCD11 bool operator> (const day& x, const day& y) NOEXCEPT;
CONSTCD11 bool operator<=(const day& x, const day& y) NOEXCEPT;
CONSTCD11 bool operator>=(const day& x, const day& y) NOEXCEPT;
CONSTCD11 day operator+(const day& x, const days& y) NOEXCEPT;
CONSTCD11 day operator+(const days& x, const day& y) NOEXCEPT;
CONSTCD11 day operator-(const day& x, const days& y) NOEXCEPT;
CONSTCD11 days operator-(const day& x, const day& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const day& d);
// month
class month
{
unsigned char m_;
public:
month() = default;
explicit CONSTCD11 month(unsigned m) NOEXCEPT;
CONSTCD14 month& operator++() NOEXCEPT;
CONSTCD14 month operator++(int) NOEXCEPT;
CONSTCD14 month& operator--() NOEXCEPT;
CONSTCD14 month operator--(int) NOEXCEPT;
CONSTCD14 month& operator+=(const months& m) NOEXCEPT;
CONSTCD14 month& operator-=(const months& m) NOEXCEPT;
CONSTCD11 explicit operator unsigned() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const month& x, const month& y) NOEXCEPT;
CONSTCD11 bool operator!=(const month& x, const month& y) NOEXCEPT;
CONSTCD11 bool operator< (const month& x, const month& y) NOEXCEPT;
CONSTCD11 bool operator> (const month& x, const month& y) NOEXCEPT;
CONSTCD11 bool operator<=(const month& x, const month& y) NOEXCEPT;
CONSTCD11 bool operator>=(const month& x, const month& y) NOEXCEPT;
CONSTCD14 month operator+(const month& x, const months& y) NOEXCEPT;
CONSTCD14 month operator+(const months& x, const month& y) NOEXCEPT;
CONSTCD14 month operator-(const month& x, const months& y) NOEXCEPT;
CONSTCD14 months operator-(const month& x, const month& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const month& m);
// year
class year
{
int64_t y_;
public:
year() = default;
explicit CONSTCD11 year(int64_t y) NOEXCEPT;
CONSTCD14 year& operator++() NOEXCEPT;
CONSTCD14 year operator++(int) NOEXCEPT;
CONSTCD14 year& operator--() NOEXCEPT;
CONSTCD14 year operator--(int) NOEXCEPT;
CONSTCD14 year& operator+=(const years& y) NOEXCEPT;
CONSTCD14 year& operator-=(const years& y) NOEXCEPT;
CONSTCD11 year operator-() const NOEXCEPT;
CONSTCD11 year operator+() const NOEXCEPT;
CONSTCD11 bool is_leap() const NOEXCEPT;
CONSTCD11 explicit operator int64_t() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
static CONSTCD11 year min() NOEXCEPT;
static CONSTCD11 year max() NOEXCEPT;
};
CONSTCD11 bool operator==(const year& x, const year& y) NOEXCEPT;
CONSTCD11 bool operator!=(const year& x, const year& y) NOEXCEPT;
CONSTCD11 bool operator< (const year& x, const year& y) NOEXCEPT;
CONSTCD11 bool operator> (const year& x, const year& y) NOEXCEPT;
CONSTCD11 bool operator<=(const year& x, const year& y) NOEXCEPT;
CONSTCD11 bool operator>=(const year& x, const year& y) NOEXCEPT;
CONSTCD11 year operator+(const year& x, const years& y) NOEXCEPT;
CONSTCD11 year operator+(const years& x, const year& y) NOEXCEPT;
CONSTCD11 year operator-(const year& x, const years& y) NOEXCEPT;
CONSTCD11 years operator-(const year& x, const year& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year& y);
// weekday
class weekday
{
unsigned char wd_;
public:
weekday() = default;
explicit CONSTCD11 weekday(unsigned wd) NOEXCEPT;
explicit weekday(int) = delete;
CONSTCD11 weekday(const sys_days& dp) NOEXCEPT;
CONSTCD11 explicit weekday(const local_days& dp) NOEXCEPT;
CONSTCD14 weekday& operator++() NOEXCEPT;
CONSTCD14 weekday operator++(int) NOEXCEPT;
CONSTCD14 weekday& operator--() NOEXCEPT;
CONSTCD14 weekday operator--(int) NOEXCEPT;
CONSTCD14 weekday& operator+=(const days& d) NOEXCEPT;
CONSTCD14 weekday& operator-=(const days& d) NOEXCEPT;
CONSTCD11 explicit operator unsigned() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
CONSTCD11 weekday_indexed operator[](unsigned index) const NOEXCEPT;
CONSTCD11 weekday_last operator[](last_spec) const NOEXCEPT;
private:
static CONSTCD11 unsigned char weekday_from_days(int z) NOEXCEPT;
};
CONSTCD11 bool operator==(const weekday& x, const weekday& y) NOEXCEPT;
CONSTCD11 bool operator!=(const weekday& x, const weekday& y) NOEXCEPT;
CONSTCD14 weekday operator+(const weekday& x, const days& y) NOEXCEPT;
CONSTCD14 weekday operator+(const days& x, const weekday& y) NOEXCEPT;
CONSTCD14 weekday operator-(const weekday& x, const days& y) NOEXCEPT;
CONSTCD14 days operator-(const weekday& x, const weekday& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd);
// weekday_indexed
class weekday_indexed
{
unsigned char wd_ : 4;
unsigned char index_ : 4;
public:
CONSTCD11 weekday_indexed(const date::weekday& wd, unsigned index) NOEXCEPT;
CONSTCD11 date::weekday weekday() const NOEXCEPT;
CONSTCD11 unsigned index() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
CONSTCD11 bool operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi);
// weekday_last
class weekday_last
{
date::weekday wd_;
public:
explicit CONSTCD11 weekday_last(const date::weekday& wd) NOEXCEPT;
CONSTCD11 date::weekday weekday() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT;
CONSTCD11 bool operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl);
// year_month
class year_month
{
date::year y_;
date::month m_;
public:
year_month() = default;
CONSTCD11 year_month(const date::year& y, const date::month& m) NOEXCEPT;
CONSTCD11 date::year year() const NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD14 year_month& operator+=(const months& dm) NOEXCEPT;
CONSTCD14 year_month& operator-=(const months& dm) NOEXCEPT;
CONSTCD14 year_month& operator+=(const years& dy) NOEXCEPT;
CONSTCD14 year_month& operator-=(const years& dy) NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 bool operator!=(const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 bool operator< (const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 bool operator> (const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 bool operator<=(const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 bool operator>=(const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD14 year_month operator+(const year_month& ym, const months& dm) NOEXCEPT;
CONSTCD14 year_month operator+(const months& dm, const year_month& ym) NOEXCEPT;
CONSTCD14 year_month operator-(const year_month& ym, const months& dm) NOEXCEPT;
CONSTCD11 months operator-(const year_month& x, const year_month& y) NOEXCEPT;
CONSTCD11 year_month operator+(const year_month& ym, const years& dy) NOEXCEPT;
CONSTCD11 year_month operator+(const years& dy, const year_month& ym) NOEXCEPT;
CONSTCD11 year_month operator-(const year_month& ym, const years& dy) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym);
// month_day
class month_day
{
date::month m_;
date::day d_;
public:
month_day() = default;
CONSTCD11 month_day(const date::month& m, const date::day& d) NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::day day() const NOEXCEPT;
CONSTCD14 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const month_day& x, const month_day& y) NOEXCEPT;
CONSTCD11 bool operator!=(const month_day& x, const month_day& y) NOEXCEPT;
CONSTCD11 bool operator< (const month_day& x, const month_day& y) NOEXCEPT;
CONSTCD11 bool operator> (const month_day& x, const month_day& y) NOEXCEPT;
CONSTCD11 bool operator<=(const month_day& x, const month_day& y) NOEXCEPT;
CONSTCD11 bool operator>=(const month_day& x, const month_day& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md);
// month_day_last
class month_day_last
{
date::month m_;
public:
CONSTCD11 explicit month_day_last(const date::month& m) NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT;
CONSTCD11 bool operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
CONSTCD11 bool operator< (const month_day_last& x, const month_day_last& y) NOEXCEPT;
CONSTCD11 bool operator> (const month_day_last& x, const month_day_last& y) NOEXCEPT;
CONSTCD11 bool operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
CONSTCD11 bool operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl);
// month_weekday
class month_weekday
{
date::month m_;
date::weekday_indexed wdi_;
public:
CONSTCD11 month_weekday(const date::month& m,
const date::weekday_indexed& wdi) NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::weekday_indexed weekday_indexed() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11 bool operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT;
CONSTCD11 bool operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd);
// month_weekday_last
class month_weekday_last
{
date::month m_;
date::weekday_last wdl_;
public:
CONSTCD11 month_weekday_last(const date::month& m,
const date::weekday_last& wd) NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::weekday_last weekday_last() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11
bool operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
CONSTCD11
bool operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl);
// class year_month_day
class year_month_day
{
date::year y_;
date::month m_;
date::day d_;
public:
year_month_day() = default;
CONSTCD11 year_month_day(const date::year& y, const date::month& m,
const date::day& d) NOEXCEPT;
CONSTCD14 year_month_day(const year_month_day_last& ymdl) NOEXCEPT;
CONSTCD14 year_month_day(sys_days dp) NOEXCEPT;
CONSTCD14 explicit year_month_day(local_days dp) NOEXCEPT;
CONSTCD14 year_month_day& operator+=(const months& m) NOEXCEPT;
CONSTCD14 year_month_day& operator-=(const months& m) NOEXCEPT;
CONSTCD14 year_month_day& operator+=(const years& y) NOEXCEPT;
CONSTCD14 year_month_day& operator-=(const years& y) NOEXCEPT;
CONSTCD11 date::year year() const NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::day day() const NOEXCEPT;
CONSTCD14 operator sys_days() const NOEXCEPT;
CONSTCD14 explicit operator local_days() const NOEXCEPT;
CONSTCD14 bool ok() const NOEXCEPT;
private:
static CONSTCD14 year_month_day from_days(days dp) NOEXCEPT;
CONSTCD14 days to_days() const NOEXCEPT;
};
CONSTCD11 bool operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD11 bool operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD11 bool operator< (const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD11 bool operator> (const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD11 bool operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD11 bool operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
CONSTCD14 year_month_day operator+(const year_month_day& ymd, const months& dm) NOEXCEPT;
CONSTCD14 year_month_day operator+(const months& dm, const year_month_day& ymd) NOEXCEPT;
CONSTCD14 year_month_day operator-(const year_month_day& ymd, const months& dm) NOEXCEPT;
CONSTCD11 year_month_day operator+(const year_month_day& ymd, const years& dy) NOEXCEPT;
CONSTCD11 year_month_day operator+(const years& dy, const year_month_day& ymd) NOEXCEPT;
CONSTCD11 year_month_day operator-(const year_month_day& ymd, const years& dy) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd);
// year_month_day_last
class year_month_day_last
{
date::year y_;
date::month_day_last mdl_;
public:
CONSTCD11 year_month_day_last(const date::year& y,
const date::month_day_last& mdl) NOEXCEPT;
CONSTCD14 year_month_day_last& operator+=(const months& m) NOEXCEPT;
CONSTCD14 year_month_day_last& operator-=(const months& m) NOEXCEPT;
CONSTCD14 year_month_day_last& operator+=(const years& y) NOEXCEPT;
CONSTCD14 year_month_day_last& operator-=(const years& y) NOEXCEPT;
CONSTCD11 date::year year() const NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::month_day_last month_day_last() const NOEXCEPT;
CONSTCD14 date::day day() const NOEXCEPT;
CONSTCD14 operator sys_days() const NOEXCEPT;
CONSTCD14 explicit operator local_days() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
};
CONSTCD11
bool operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD11
bool operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD11
bool operator< (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD11
bool operator> (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD11
bool operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD11
bool operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
CONSTCD14
year_month_day_last
operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
CONSTCD14
year_month_day_last
operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT;
CONSTCD11
year_month_day_last
operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
CONSTCD11
year_month_day_last
operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT;
CONSTCD14
year_month_day_last
operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
CONSTCD11
year_month_day_last
operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl);
// year_month_weekday
class year_month_weekday
{
date::year y_;
date::month m_;
date::weekday_indexed wdi_;
public:
CONSTCD11 year_month_weekday(const date::year& y, const date::month& m,
const date::weekday_indexed& wdi) NOEXCEPT;
CONSTCD14 year_month_weekday(const sys_days& dp) NOEXCEPT;
CONSTCD14 explicit year_month_weekday(const local_days& dp) NOEXCEPT;
CONSTCD14 year_month_weekday& operator+=(const months& m) NOEXCEPT;
CONSTCD14 year_month_weekday& operator-=(const months& m) NOEXCEPT;
CONSTCD14 year_month_weekday& operator+=(const years& y) NOEXCEPT;
CONSTCD14 year_month_weekday& operator-=(const years& y) NOEXCEPT;
CONSTCD11 date::year year() const NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::weekday weekday() const NOEXCEPT;
CONSTCD11 unsigned index() const NOEXCEPT;
CONSTCD11 date::weekday_indexed weekday_indexed() const NOEXCEPT;
CONSTCD14 operator sys_days() const NOEXCEPT;
CONSTCD14 explicit operator local_days() const NOEXCEPT;
CONSTCD14 bool ok() const NOEXCEPT;
private:
static CONSTCD14 year_month_weekday from_days(days dp) NOEXCEPT;
CONSTCD14 days to_days() const NOEXCEPT;
};
CONSTCD11
bool operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
CONSTCD11
bool operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
CONSTCD14
year_month_weekday
operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
CONSTCD14
year_month_weekday
operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT;
CONSTCD11
year_month_weekday
operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
CONSTCD11
year_month_weekday
operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT;
CONSTCD14
year_month_weekday
operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
CONSTCD11
year_month_weekday
operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi);
// year_month_weekday_last
class year_month_weekday_last
{
date::year y_;
date::month m_;
date::weekday_last wdl_;
public:
CONSTCD11 year_month_weekday_last(const date::year& y, const date::month& m,
const date::weekday_last& wdl) NOEXCEPT;
CONSTCD14 year_month_weekday_last& operator+=(const months& m) NOEXCEPT;
CONSTCD14 year_month_weekday_last& operator-=(const months& m) NOEXCEPT;
CONSTCD14 year_month_weekday_last& operator+=(const years& y) NOEXCEPT;
CONSTCD14 year_month_weekday_last& operator-=(const years& y) NOEXCEPT;
CONSTCD11 date::year year() const NOEXCEPT;
CONSTCD11 date::month month() const NOEXCEPT;
CONSTCD11 date::weekday weekday() const NOEXCEPT;
CONSTCD11 date::weekday_last weekday_last() const NOEXCEPT;
CONSTCD14 operator sys_days() const NOEXCEPT;
CONSTCD14 explicit operator local_days() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
private:
CONSTCD14 days to_days() const NOEXCEPT;
};
CONSTCD11
bool
operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
CONSTCD11
bool
operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
CONSTCD14
year_month_weekday_last
operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
CONSTCD14
year_month_weekday_last
operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT;
CONSTCD14
year_month_weekday_last
operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
CONSTCD11
year_month_weekday_last
operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
template<class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl);
#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
inline namespace literals
{
CONSTCD11 date::day operator ""_d(unsigned long long d) NOEXCEPT;
CONSTCD11 date::year operator ""_y(unsigned long long y) NOEXCEPT;
// CONSTDATA date::month jan{1};
// CONSTDATA date::month feb{2};
// CONSTDATA date::month mar{3};
// CONSTDATA date::month apr{4};
// CONSTDATA date::month may{5};
// CONSTDATA date::month jun{6};
// CONSTDATA date::month jul{7};
// CONSTDATA date::month aug{8};
// CONSTDATA date::month sep{9};
// CONSTDATA date::month oct{10};
// CONSTDATA date::month nov{11};
// CONSTDATA date::month dec{12};
//
// CONSTDATA date::weekday sun{0u};
// CONSTDATA date::weekday mon{1u};
// CONSTDATA date::weekday tue{2u};
// CONSTDATA date::weekday wed{3u};
// CONSTDATA date::weekday thu{4u};
// CONSTDATA date::weekday fri{5u};
// CONSTDATA date::weekday sat{6u};
} // inline namespace literals
#endif // !defined(_MSC_VER) || (_MSC_VER >= 1900)
//----------------+
// Implementation |
//----------------+
// utilities
namespace detail {
template<class CharT, class Traits = std::char_traits<CharT>>
class save_stream
{
std::basic_ostream<CharT, Traits>& os_;
CharT fill_;
std::ios::fmtflags flags_;
std::locale loc_;
public:
~save_stream()
{
os_.fill(fill_);
os_.flags(flags_);
os_.imbue(loc_);
}
save_stream(const save_stream&) = delete;
save_stream& operator=(const save_stream&) = delete;
explicit save_stream(std::basic_ostream<CharT, Traits>& os)
: os_(os)
, fill_(os.fill())
, flags_(os.flags())
, loc_(os.getloc())
{}
};
#ifdef __GNUC__
// GCC complains about __int128 with -pedantic or -pedantic-errors
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
template <class T>
struct choose_trunc_type
{
static const int digits = std::numeric_limits<T>::digits;
using type = typename std::conditional
<
digits < 32,
std::int32_t,
typename std::conditional
<
digits < 64,
std::int64_t,
#ifdef __SIZEOF_INT128__
__int128
#else
std::int64_t
#endif
>::type
>::type;
};
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
template <class T>
CONSTCD11
inline
typename std::enable_if
<
!std::chrono::treat_as_floating_point<T>::value,
T
>::type
trunc(T t) NOEXCEPT
{
return t;
}
template <class T>
CONSTCD14
inline
typename std::enable_if
<
std::chrono::treat_as_floating_point<T>::value,
T
>::type
trunc(T t) NOEXCEPT
{
using namespace std;
using I = typename choose_trunc_type<T>::type;
CONSTDATA auto digits = numeric_limits<T>::digits;
static_assert(digits < numeric_limits<I>::digits, "");
CONSTDATA auto max = I{1} << (digits-1);
CONSTDATA auto min = -max;
const auto negative = t < T{0};
if (min <= t && t <= max && t != 0 && t == t)
{
t = static_cast<T>(static_cast<I>(t));
if (t == 0 && negative)
t = -t;
}
return t;
}
} // detail
// trunc towards zero
template <class To, class Rep, class Period>
CONSTCD11
inline
To
trunc(const std::chrono::duration<Rep, Period>& d)
{
return To{detail::trunc(std::chrono::duration_cast<To>(d).count())};
}
#ifndef HAS_CHRONO_ROUNDING
# if defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 190023918
# define HAS_CHRONO_ROUNDING 1
# elif defined(__cpp_lib_chrono) && __cplusplus > 201402 && __cpp_lib_chrono >= 201510
# define HAS_CHRONO_ROUNDING 1
# elif defined(_LIBCPP_VERSION) && __cplusplus > 201402 && _LIBCPP_VERSION >= 3800
# define HAS_CHRONO_ROUNDING 1
# else
# define HAS_CHRONO_ROUNDING 0
# endif
#endif // HAS_CHRONO_ROUNDING
#if HAS_CHRONO_ROUNDING == 0
// round down
template <class To, class Rep, class Period>
CONSTCD14
inline
To
floor(const std::chrono::duration<Rep, Period>& d)
{
auto t = trunc<To>(d);