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

From cppreference.com
< cpp‎ | chrono‎ | weekday

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 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

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