std::chrono::time_point<Clock,Duration>::time_point
| (1) | ||
|
(since C++11) (constexpr since C++14) |
|
| (2) | ||
|
(since C++11) (constexpr since C++14) |
|
| (3) | ||
|
(since C++11) (constexpr since C++14) |
Constructs a new time_point from one of several optional data sources.
1) Default constructor, creates a
time_point representing the Clock's epoch (i.e., time_since_epoch() is zero).
2) Constructs a
time_point at Clock's epoch plus d.
3) Constructs a
time_point by converting t to duration. This constructor only participates in overload resolution if Duration2 is implicitly convertible to duration.
Parameters
| d | - | a duration to copy from |
| t | - | a time_point to convert from |
Example
#include <chrono>
#include <iostream>
using Clock = std::chrono::steady_clock;
using TimePoint = std::chrono::time_point<Clock>;
void print_ms(const TimePoint& point)
{
using Ms = std::chrono::milliseconds;
const Clock::duration since_epoch = point.time_since_epoch();
std::cout << std::chrono::duration_cast<Ms>(since_epoch) << '\n';
}
int main()
{
const TimePoint default_value = TimePoint(); // (1)
print_ms(default_value); // 0ms
const Clock::duration duration_4_seconds = std::chrono::seconds(4);
const TimePoint time_point_4_seconds(duration_4_seconds); // (2)
// 4 seconds from start of epoch
print_ms(time_point_4_seconds); // 4000ms
const TimePoint time_point_now = Clock::now(); // (3)
print_ms(time_point_now); // 212178842ms
}Possible output:
0ms
4000ms
212178842msSee also
| constructs new duration (public member function of std::chrono::duration<Rep,Period>) |
|
|
(C++11)
|
converts a duration to another, with a different tick interval (function template) |
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