std::chrono::operator<=>

namespace std::chrono {
  constexpr strong_ordering operator<=>(const month& x, const month& y) noexcept; // (1) C++20
}

概要

month同士の三方比較を行う。

戻り値

(1) : static_cast<unsigned int>(x) <=> static_cast<unsigned int>(y);

例外

投げない

備考

この演算子により、operator<、operator<=、operator>、operator>=が使用可能になる

例

#include <cassert>
#include <chrono>

namespace chrono = std::chrono;

int main()
{
  assert((chrono::January <=> chrono::January) == 0);

  assert(chrono::January < chrono::February);
  assert(chrono::January <= chrono::February);

  assert(chrono::February > chrono::January);
  assert(chrono::February >= chrono::January);
}

 
#include <cassert>
#include <chrono>
​
namespace chrono = std::chrono;
​
int main()
{
  assert((chrono::January <=> chrono::January) == 0);
​
  assert(chrono::January < chrono::February);
  assert(chrono::January <= chrono::February);
​
  assert(chrono::February > chrono::January);
  assert(chrono::February >= chrono::January);
}
​

Class / Function / Type

Header file

Other / All

std::chrono::operator<=>

概要

戻り値

例外

備考

例

出力

バージョン

言語

処理系