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std::chrono::year::operator+, std::chrono::year::operator-

来自cppreference.com

< cpp‎ | chrono‎ | year

日期和时间工具

时间点

time_point

(C++11)

clock_time_conversion

(C++20)

clock_cast

(C++20)

时长

duration

(C++11)

时钟

system_clock (C++11)
steady_clock (C++11)
high_resolution_clock (C++11)

is_clock (C++20)
utc_clock (C++20)
tai_clock (C++20)

gps_clock (C++20)
file_clock (C++20)
local_t (C++20)

当天时刻

is_amis_pm

(C++20)(C++20)

make12make24

(C++20)(C++20)

hh_mm_ss (C++20)

日历

day (C++20)
month (C++20)
year (C++20)
weekday (C++20)
operator/ (C++20)
year_month_day (C++20)

year_month_day_last (C++20)
year_month_weekday (C++20)
year_month_weekday_last (C++20)
weekday_indexed (C++20)
weekday_last (C++20)
month_day (C++20)

month_day_last (C++20)
month_weekday (C++20)
month_weekday_last (C++20)
year_month (C++20)
last_speclast (C++20)(C++20)

时区

tzdb (C++20)
tzdb_list (C++20)
get_tzdbget_tzdb_listreload_tzdbremote_version (C++20)(C++20)(C++20)(C++20)
sys_info (C++20)

local_info (C++20)
nonexistent_local_time (C++20)
ambiguous_local_time (C++20)
locate_zone (C++20)
current_zone (C++20)
time_zone (C++20)
choose (C++20)

zoned_traits (C++20)
zoned_time (C++20)
time_zone_link (C++20)
leap_second (C++20)
leap_second_info (C++20)
get_leap_second_info (C++20)

parse

(C++20)

C 风格日期和时间

constexpr std::chrono::year operator+() noexcept;	(1)	(C++20 起)
constexpr std::chrono::year operator-() noexcept;	(2)	(C++20 起)

应用一元运算符到年份值。

1) 返回 *this 的副本。

2) 返回年份值为 *this 的年份值相反数的 year 。

返回值

1) *this

2) std::chrono::year(-int(*this))

示例

本节未完成
原因：暂无示例

来自“https://zh.cppreference.com/mwiki/index.php?title=cpp/chrono/year/operator_sign&oldid=75891”