std::chrono::weekday::operator[]

 

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Calendar 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) chrono I/O parse (C++20)

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std::chrono::weekday

Member functions

weekday::weekday

weekday::operator++weekday::operator--

weekday::operator+=weekday::operator-=

weekday::c_encodingweekday::iso_encoding

weekday::ok

weekday::operator[]

Nonmember functions

operator==

operator+operator-

operator<<

from_stream

Helper classes

formatter<std::chrono::weekday>

formatter<std::chrono::hash> (C++26)

 

constexpr std::chrono::weekday_indexed operator[]( unsigned index ) const noexcept;	(1)	(since C++20)
constexpr std::chrono::weekday_last operator[]( std::chrono::last_spec ) const noexcept;	(2)	(since C++20)

1) Constructs a std::chrono::weekday_indexed from *this and index. The result represents the index-th weekday in some yet-to-be-specified month. If index is not in the range [0, 7] or if !ok() the values (an underlying weekday and an index) held in the result are unspecified.

2) Constructs a std::chrono::weekday_last from *this. The result represents the last weekday in some yet-to-be-specified month.

Return value

1) std::chrono::weekday_indexed(*this, index)

2) std::chrono::weekday_last(*this)

Example

Run this code

#include <chrono>
#include <iostream>
using namespace std::chrono;
 
int main()
{
    constexpr auto second_tuesday_in_October_2019 =
        year_month_day{Tuesday[2] / October / 2019y};

    constexpr auto last_tuesday_in_October_2019 =
        year_month_day{Tuesday[last] / October / 2019y};

    std::cout << second_tuesday_in_October_2019 << '\n'
              << last_tuesday_in_October_2019 << '\n'; 
}

Possible output:

2019-10-08
2019-10-29