std::chrono::weekday::c_encoding, std::chrono::weekday::iso_encoding
cppreference.com
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constexpr unsigned c_encoding() const noexcept; |
(1) | ( C++20) |
constexpr unsigned iso_encoding() const noexcept; |
(2) | ( C++20) |
1) ,
*this.2) ,
*this, , ( 0) 7 ISO 8601.1) ,
*this.2)
c_encoding() == 0u ? 7u : c_encoding().#include <chrono>
#include <iostream>
int main()
{
std::cout << "i: C: ISO: :\n";
for (unsigned i{0}; i != 8; ++i) {
const std::chrono::weekday w{i};
std::cout << i << " "
<< w.c_encoding() << " "
<< w.iso_encoding() << " "
<< w << '\n';
}
}
:
i: C: ISO: :
0 0 7 Sun
1 1 1 Mon
2 2 2 Tue
3 3 3 Wed
4 4 4 Thu
5 5 5 Fri
6 6 6 Sat
7 0 7 Sun