std::chrono::weekday::operator[]
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std::chrono::weekday
Member functions
weekday::operator[]
Nonmember functions
Helper classes
(C++26)
constexpr std::chrono::weekday_indexed
operator[]( unsigned index ) const noexcept;
(1)
(since C++20)
operator[]( unsigned index ) const noexcept;
constexpr std::chrono::weekday_last
operator[]( std::chrono::last_spec ) const noexcept;
(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.
[edit] Return value
1) std::chrono::weekday_indexed (*this, index)
2) std::chrono::weekday_last (*this)
[edit] 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年10月08日 2019年10月29日