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std::chrono::time_zone:: to_local

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C++
Date and time library
std::chrono::time_zone
Member functions
time_zone::to_local
Nonmember functions
template < class Duration >

auto to_local ( const std:: chrono :: sys_time < Duration > & tp ) const

- > std:: chrono :: local_time < std:: common_type_t < Duration, std:: chrono :: seconds >> ;
(depuis C++20)

Convertit le sys_time tp en local_time correspondant dans ce fuseau horaire .

Table des matières

Paramètres

tp - un point temporel à convertir

Valeur de retour

Le local_time associé à tp et ce fuseau horaire.

Notes

La précision du résultat est au moins de std::chrono::seconds , et sera plus fine si l'argument a une précision plus fine.

Exemple

Exécuter ce code 
#include <chrono>
#include <iostream>
int main()
{
    const auto some_zone_name{"Australia/Sydney"};
    const auto time_pt_utc{std::chrono::system_clock::now()};
    std::cout << "Current time UTC is:\t\t " << time_pt_utc << '\n';
    try
    {
        std::cout << "Current time local is:\t\t "
                  << std::chrono::current_zone()-> // may throw
                      to_local(time_pt_utc) << '\n'
                  << "Current time " << some_zone_name << " is:\t "
                  << std::chrono::locate_zone(some_zone_name)-> // may throw
                      to_local(time_pt_utc) << '\n';
    }
    catch(const std::runtime_error& ex)
    {
        std::cout << ex.what() << '\n';
    }
}

Sortie possible : 

Current time UTC is:              2025-02-10 13:38:13.233872158
Current time local is:            2025-02-10 16:38:13.233872158
Current time Australia/Sydney is: 2025-02-11 00:38:13.233872158