std::chrono::time_point<Clock,Duration>::time_point
From cppreference.com
< cpp | chrono | time point
(1) | ||
time_point(); |
(since C++11) (constexpr since C++14) |
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(2) | ||
explicit time_point( const duration& d ); |
(since C++11) (constexpr since C++14) |
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(3) | ||
template< class Duration2 > time_point( const time_point<Clock, Duration2>& t ); |
(since C++11) (constexpr since C++14) |
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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
.[edit] Parameters
d | - | a duration to copy from
|
t | - | a time_point to convert from
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[edit] Example
Run this code
#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 212178842ms
[edit] See 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) |