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std::chrono::time_point

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C++
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
Data e ora utilità
 
std::chrono::time_point
Membri funzioni
Original:
Member functions
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time_point::time_point
time_point::time_since_epoch
time_point::operator+
time_point::operator-
time_point::min
time_point::max
Non membri funzioni
Original:
Non-member functions
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common_type
operator+
operator-
operator==
operator!=
operator<
operator<=
operator>
operator>=
time_point_cast
 
Elemento definito nell'header <chrono>
template<

    class Clock,
    class Duration = typename Clock::duration

> class time_point;
 (dal C++11)
Modello std::chrono::time_point classe rappresenta un punto nel tempo. È implementato come se si memorizza un valore di tipo Duration indica l'intervallo di tempo dall'inizio di epoca della Clock di.
Original:
Class template std::chrono::time_point represents a point in time. It is implemented as if it stores a value of type Duration indicating the time interval from the start of the Clock's epoch.
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Indice

[modifica] Membri tipi

Membro tipo
Original:
Member type
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 Definition
clock
Clock, l'orologio sul quale si misura tale punto temporale
Original:
Clock, the clock on which this time point is measured
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duration
Duration, un tipo std::chrono::duration utilizzato per misurare il tempo trascorso epoca
Original:
Duration, a std::chrono::duration type used to measure the time since epoch
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rep
Rep, un tipo aritmetico che rappresenta il numero di segni di graduazione della durata
Original:
Rep, an arithmetic type representing the number of ticks of the duration
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period
Period, un tipo che rappresenta il periodo std::ratio tick della durata
Original:
Period, a std::ratio type representing the tick period of the duration
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[modifica] Membri funzioni
costruisce un nuovo punto di tempo
Original:
constructs a new time point
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(metodo pubblico) [modifica]
restituisce il punto di tempo come durata dall'inizio del suo orologio
Original:
returns the time point as duration since the start of its clock
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(metodo pubblico) [modifica]
modifica il punto di tempo dalla data durata
Original:
modifies the time point by the given duration
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(metodo pubblico) [modifica]
[statico]
restituisce il punto di tempo corrispondente alla durata minima
Original:
returns the time point corresponding to the smallest duration
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(metodo pubblico statico) [modifica]
[statico]
 returns the time point corresponding to the largest duration
(metodo pubblico statico) [modifica]

[modifica] Non membri funzioni
specializzata il tratto std::common_type
Original:
specializes the std::common_type trait
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(classe modello di specializzazione) [modifica]
modifica il punto di tempo dalla data durata
Original:
modifies the time point by the given duration
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(funzione di modello) [modifica]
confronta due punti temporali
Original:
compares two time points
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(funzione di modello) [modifica]
converts a time point to another time point on the same clock, with a different duration
(funzione di modello) [modifica]

[modifica] Esempio

Questo esempio visualizza l'ora attuale meno 24 ore:
Original:
This example prints the current time minus 24 hours:
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#include <iostream>
#include <iomanip>
#include <ctime>
#include <chrono>
 
int main()
{
    std::chrono::time_point<std::chrono::system_clock> now;
    now = std::chrono::system_clock::now();
    std::time_t now_c = std::chrono::system_clock::to_time_t(
                            now - std::chrono::hours(24));
    std::cout << "One day ago, the time was "
              << std::put_time(std::localtime(&now_c), "%F %T") << '\n';
}

Possible output: 

One day ago, the time was 2011-10-25 12:00:08

[modifica] Vedi anche

(C++11)
un intervallo di tempo
Original:
a time interval
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(classe template)
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/chrono/time_point&oldid=25085"