std::chrono::year::year
year() = default; |
(1) | (since C++20) |
explicit constexpr year(int y) noexcept; |
(2) | (since C++20) |
Constructs a year object.
1) Default constructor leaves the year value uninitialized.
2) If
y is in the range [-32767, 32767], constructs a
year object holding the year value
y. Otherwise the value held is unspecified.
Example
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono;
constexpr int leap_years = [] {
int count{};
for (int i{year::min()}; i <= int{year::max()}; ++i)
if (year{i}.is_leap()) // uses constructor (2)
++count;
return count;
} ();
static_assert(15891 == leap_years);
std::cout << "There are " << leap_years << " leap years in the range ["
<< int(year::min()) << ", " << int(year::max()) << "].\n";
}
Output:
There are 15891 leap years in the range [-32767, 32767].
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