- chrono[meta header]
- std::chrono[meta namespace]
- function[meta id-type]
- cpp20[meta cpp]
namespace std::chrono {
constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept; // (1) C++20
}
month_weekday
同士の等値比較を行う。
- (1) :
return x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed();
- month()[link month.md]
- weekday_indexed()[link weekday_indexed.md]
投げない
- この演算子により、
operator!=
が使用可能になる
#include <cassert>
#include <chrono>
using namespace std::chrono;
int main()
{
assert(March/Sunday[1] == March/Sunday[1]);
assert(March/Sunday[1] != March/Sunday[2]);
}
- March[link /reference/chrono/month_constants.md]
- Sunday[link /reference/chrono/weekday_constants.md]
- C++20
- Clang: 8.0 [mark verified]
- GCC: 11.1 [mark verified]
- Visual C++: 2019 Update 3 [mark noimpl]