# 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 [1, 5] or if !ok() the values held in the result is 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()
    {
      // second tuesday in October 2019
      std::cout << year_month_day{ Tuesday[2] / October / 2019y } << '\n'
      // last tuesday in October 2019
                << year_month_day{ Tuesday[last] / October / 2019y } << '\n';
    }

Output:

    2019-10-08
    2019-10-29

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