NAME¶

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

Synopsis¶

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

1) Constructs a 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 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