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std::chrono...::time_point(3) C++ Standard Libarystd::chrono...::time_point(3) NAME std::chrono::time_point::time_point - std::chrono::time_point::time_point Synopsis (since time_point(); C++11) (until C++14) constexpr time_point(); (since C++14) (since explicit time_point( const duration& d ); C++11) (un- til (1) C++14) constexpr explicit time_point( const duration& d ); (since C++14) (2) (since template< class Duration2 > C++11) time_point( const time_point<Clock,Duration2>& t ); (until (3) C++14) template< class Duration2 > (since constexpr time_point( const C++14) time_point<Clock,Duration2>& t ); 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 con- structor only participates in overload resolution if Duration2 is implicitly con- vertible to duration. Parameters d - a duration to copy from t - a time_point to convert from Example // Run this code #include <chrono> #include <iostream> using Clock = std::chrono::high_resolution_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).count() << " ms\n"; } int main() { const TimePoint default_value = TimePoint(); // (1) print_ms(default_value); // 0 ms const Clock::duration duration_4_seconds = std::chrono::sec- onds(4); const TimePoint time_point_4_seconds(duration_4_seconds); // (2) // 4 seconds from start of epoch print_ms(time_point_4_seconds); // 4000 ms const TimePoint time_point_now = Clock::now(); // (3) print_ms(time_point_now); // 43098276 ms } Possible output: 0 ms 4000 ms 43098276 ms See also constructor constructs new duration (public member function of std::chrono::dura- tion<Rep,Period>) duration_cast converts a duration to another, with a different tick interval (C++11) (function template) http://cppreference.com 2022.07.31 std::chrono...::time_point(3)
NAME | Synopsis | Parameters | Example | Possible output: | See also
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