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std::chrono::system_clock::from_time_t(3) | C++ Standard Libary | std::chrono::system_clock::from_time_t(3) |
NAME¶
std::chrono::system_clock::from_time_t - std::chrono::system_clock::from_time_t
Synopsis¶
static std::chrono::system_clock::time_point from_time_t(
std::time_t (since C++11)
t ) noexcept;
Converts t to a time point type, using the coarser precision of the two
types.
If time_point has lower precision, it is implementation defined whether the
value is
rounded or truncated.
Parameters¶
t - std::time_t value to convert
Return value¶
A value of type std::chrono::system_clock::time_point representing t.
Example¶
// Run this code
#include <chrono>
#include <ctime>
#include <iostream>
#include <thread>
int main()
{
using namespace std::chrono_literals;
const std::time_t t = std::time(nullptr); // usually has "1 second"
precision
const auto from = std::chrono::system_clock::from_time_t(t);
std::this_thread::sleep_for(500ms);
const auto diff = std::chrono::system_clock::now() - from;
std::cout << diff << " ("
<< std::chrono::round<std::chrono::milliseconds>(diff)
<< ")\n";
}
Possible output:¶
987654321ns (987ms)
See also¶
to_time_t converts a system clock time point to std::time_t
[static] (public static member function)
2024.06.10 | http://cppreference.com |