std::chrono...::to_time_t(3)

hey bestie, welcome to the std::chrono...::to_time_t(3) page from the C++ Standard Libary manual. it's giving “tiny chrono utility that makes your time_t dreams come true” ✨

💖 NAME 💖

std::chrono::system_clock::to_time_t - std::chrono::system_clock::to_time_t

okay so that’s the name, listed twice, and honestly? iconic. periodt.

✨ Synopsis ✨

static std::time_t to_time_t( const time_point& t ) noexcept;  (since C++11)

so yeah: it converts t to a std::time_t type. if std::time_t has lower precision, it is implementation-defined whether the value is rounded or truncated. no cap, that’s the whole technical tea ☕

🌸 Parameters 🌸

• t — the system clock time point to convert, bestie.

💅 Return value 💅

A std::time_t value representing t. that’s it, that’s the vibe 🫶

🎀 Example 🎀

Get the current time as a std::time_t two ways. the manual says // Run this code, so here’s the code:

#include <chrono>
#include <ctime>
#include <iostream>
#include <thread>
using namespace std::chrono_literals;

int main()
{
    // The old way
    std::time_t oldt = std::time({});

    std::this_thread::sleep_for(2700ms);

    // The new way
    auto const now = std::chrono::system_clock::now();
    std::time_t newt = std::chrono::system_clock::to_time_t(now);

    std::cout << "newt - oldt == " << newt - oldt << " s\n";
}

Possible output

newt - oldt == 3 s

🦋 See also 🦋

• from_time_t — converts std::time_t to a system clock time point [static] (public static member function).

okay that’s the whole page, bestie. source/version/date energy: http://cppreference.com, 2024.06.10 — catch u later 💜