std::chrono::duration::operator+(unary), std::chrono::duration::operator-(unary)

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, in avanti e spostare Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Data e ora utilità

time_point (C++11)

duration (C++11)

system_clock (C++11)

steady_clock (C++11)

high_resolution_clock (C++11)

C-stile di data e ora

 

std::chrono::duration

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

duration::duration

duration::operator=

duration::count

duration::zero

duration::min

duration::max

duration::operator+ duration::operator-

duration::operator++ duration::operator--

duration::operator+= duration::operator-= duration::operator*= duration::operator/= duration::operator%=

Non membri funzioni Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

common_type

operator+ operator- operator* operator/ operator%

operator== operator!= operator< operator<= operator> operator>=

duration_cast

Helper classi Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

treat_as_floating_point

duration_values

 

constexpr duration operator+()const;	(1)
constexpr duration operator-()const;	(2)

Implementa unari meno e più unario per la durata.

Original:

Implements unary plus and unary minus for the durations.

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Se rep_ è una variabile membro nell'azienda il numero di zecche in un oggetto durata

Original:

If rep_ is a member variable holding the number of ticks in a duration object,

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1)

Equivalente a return*this;

Original:

Equivalent to return*this;

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2)

Equivalente a return duration(-rep_);

Original:

Equivalent to return duration(-rep_);

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Parametri

(Nessuno)

Original:

(none)

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Valore di ritorno

1)

una copia di questo oggetto durata

Original:

a copy of this duration object

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2)

una copia di questo oggetto durata, con il numero di tick negati

Original:

a copy of this duration object, with the number of ticks negated

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Esempio

#include <chrono>#include <iostream>   int main(){std::chrono::seconds s1(10);std::chrono::seconds s2 =-s1;   std::cout<<"negated 10 seconds are "<< s2.count()<<" seconds\n";}

Output:

negated 10 seconds are -10 seconds

Vedi anche

operator++ operator++(int) operator-- operator--(int)	incrementa o decrementa il conteggio Original: increments or decrements the tick count The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
operator+ operator- operator* operator/ operator%	implementa operazioni aritmetiche con durate come argomenti Original: implements arithmetic operations with durations as arguments The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)