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