std::chrono::time_point<Clock,Duration>::min

 

C++

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Language support Type support (basic types, RTTI) Library feature-test macros (C++20) Dynamic memory management Program utilities Coroutine support (C++20) Variadic functions is_constant_evaluated (C++20) is_within_lifetime (C++26) initializer_list (C++11) source_location (C++20) Three-way comparison three_way_comparablethree_way_comparable_with (C++20)(C++20) strong_ordering (C++20) weak_ordering (C++20) partial_ordering (C++20) common_comparison_category (C++20) compare_three_way_result (C++20) compare_three_way (C++20) strong_order (C++20) weak_order (C++20) partial_order (C++20) compare_strong_order_fallback (C++20) compare_weak_order_fallback (C++20) compare_partial_order_fallback (C++20)   is_eqis_ltis_lteq (C++20)(C++20)(C++20)   is_neqis_gtis_gteq (C++20)(C++20)(C++20)

General utilities Date and time Function objects Formatting library (C++20)   bitset hash (C++11) Relational operators (deprecated in C++20) rel_ops::operator!=rel_ops::operator>    rel_ops::operator<=rel_ops::operator>= Integer comparison functions cmp_equalcmp_lesscmp_less_than (C++20)(C++20)(C++20)   cmp_not_equalcmp_greatercmp_greater_than (C++20)(C++20)(C++20) in_range (C++20) Swap and type operations swap ranges::swap (C++20) exchange (C++14) declval (C++11) to_underlying (C++23) forward (C++11) forward_like (C++23) move (C++11) move_if_noexcept (C++11) as_const (C++17) Common vocabulary types pair tuple (C++11) optional (C++17) any (C++17) variant (C++17) tuple_size (C++11) tuple_element (C++11) apply (C++17) make_from_tuple (C++17) expected (C++23) Elementary string conversions to_chars (C++17) from_chars (C++17) chars_format (C++17) to_chars_result (C++17) from_chars_result (C++17)

 

Date and time utilities

Time point
time_point (C++11)	clock_time_conversion (C++20)	clock_cast (C++20)
Duration
duration (C++11)
Clocks
system_clock (C++11) steady_clock (C++11) is_clock (C++20)	utc_clock (C++20) tai_clock (C++20) high_resolution_clock (C++11)	gps_clock (C++20) file_clock (C++20) local_t (C++20)
Time of day
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day (C++20) month (C++20) year (C++20) weekday (C++20) operator/ (C++20) year_month_day (C++20)	year_month_day_last (C++20) year_month_weekday (C++20) year_month_weekday_last (C++20)   weekday_indexed (C++20) weekday_last (C++20) month_day (C++20)	month_day_last (C++20) month_weekday (C++20) month_weekday_last (C++20) year_month (C++20) last_speclast (C++20)(C++20)
Time zone
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chrono I/O
parse (C++20)
C-style date and time

 

std::chrono::time_point

Member functions

time_point::time_point

time_point::time_since_epoch

time_point::operator+=time_point::operator-=

time_point::operator++time_point::operator-- (C++20)(C++20)

time_point::min

time_point::max

Non-member functions

operator+operator-

operator==operator!=operator<operator<=operator>operator>=operator<=> (until C++20)(C++20)

time_point_cast

floor (C++17)

ceil (C++17)

round (C++17)

Helper classes

common_type

hash<std::chrono::time_point> (C++26)

 

static constexpr time_point min();		(until C++20)
static constexpr time_point min() noexcept;		(since C++20)

Returns a time_point with the smallest possible duration, i.e. time_point(duration::min()).

Parameters

(none)

Return value

The smallest possible time_point.

Example

Run this code

#include <chrono>
#include <iomanip>
#include <iostream>
#include <ratio>
#include <string>
 
constexpr auto steady_min = std::chrono::steady_clock::time_point::min();
 
void animate_frame_at_time_offset(double game_time)
{
    std::cout << std::string(static_cast<int>(game_time) % 10 + 1, '*') << '\n';
}
 
int main()
{
    auto last_frame = steady_min;
    std::chrono::duration<double, std::micro> game_time{0.0};
 
    for (int n = 0; n < 5; ++n)
    {
        const auto current_frame = std::chrono::steady_clock::now();
        // initialize timer if first frame ever:
        if (last_frame == steady_min)
            last_frame = current_frame;
        game_time += current_frame - last_frame;
        std::cout << "Drawing frame at " << std::setprecision(10)
                  << std::setw(8) << game_time.count() << " μs ";
        animate_frame_at_time_offset(game_time.count());
    }
}

Possible output:

Drawing frame at        0 μs *
Drawing frame at  134.499 μs *****
Drawing frame at  274.337 μs *****
Drawing frame at  416.571 μs *******
Drawing frame at  561.124 μs **