namespace std {
namespace chrono {
template <class Clock, class Duration1, class Rep2, class Period2>
time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
operator+(const time_point<Clock, Duration1>& lhs,
const duration<Rep2, Period2>& rhs); // (1) C++11
template <class Clock, class Duration1, class Rep2, class Period2>
constexpr time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
operator+(const time_point<Clock, Duration1>& lhs,
const duration<Rep2, Period2>& rhs); // (1) C++14
template <class Rep1, class Period1, class Clock, class Duration2>
time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>
operator+(const duration<Rep1, Period1>& lhs,
const time_point<Clock, Duration2>& rhs); // (2) C++11
template <class Rep1, class Period1, class Clock, class Duration2>
constexpr time_point<Clock, typename common_type<duration<Rep1, Period1>, Duration2>::type>
operator+(const duration<Rep1, Period1>& lhs,
const time_point<Clock, Duration2>& rhs); // (2) C++14
}}
概要
time_pointに時間間隔の加算を行う。
戻り値
- (1)
using ct = time_point<Clock, common_type<decltype(lhs), decltype(rhs)>>;
return ct(lhs) += rhs;
- (2)
return rhs + lhs;
例
#include <iostream>
#include <chrono>
namespace chrono = std::chrono;
int main()
{
using time_point = chrono::system_clock::time_point;
time_point tp1 = time_point{} + chrono::seconds{3}; // エポックに3秒を加算
auto sec1 = chrono::duration_cast<chrono::seconds>(tp1.time_since_epoch());
std::cout << sec1.count() << std::endl;
time_point tp2 = chrono::seconds{3} + time_point{};
auto sec2 = chrono::duration_cast<chrono::seconds>(tp2.time_since_epoch());
std::cout << sec2.count() << std::endl;
}
18
#include <iostream>#include <chrono>namespace chrono = std::chrono;int main(){ using time_point = chrono::system_clock::time_point; time_point tp1 = time_point{} + chrono::seconds{3}; // エポックに3秒を加算 auto sec1 = chrono::duration_cast<chrono::seconds>(tp1.time_since_epoch()); std::cout << sec1.count() << std::endl; time_point tp2 = chrono::seconds{3} + time_point{}; auto sec2 = chrono::duration_cast<chrono::seconds>(tp2.time_since_epoch()); std::cout << sec2.count() << std::endl;}出力
3
3
バージョン
言語
- C++11
処理系
- Clang: 3.2 ✅
- GCC: 4.6.1 ✅
- Visual C++: 2012 ✅, 2013 ✅, 2015 ✅