operator==,!=,<,<=,>,>=(std::chrono::duration)

 

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

 

template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator==(const duration<Rep1, Period1>& lhs,                           const duration<Rep2, Period2>& rhs);	(1)
template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator!=(const duration<Rep1, Period1>& lhs,                           const duration<Rep2, Period2>& rhs);	(2)
template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator<(const duration<Rep1, Period1>& lhs,                          const duration<Rep2, Period2>& rhs);	(3)
template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator<=(const duration<Rep1, Period1>& lhs,                           const duration<Rep2, Period2>& rhs);	(4)
template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator>(const duration<Rep1, Period1>& lhs,                          const duration<Rep2, Period2>& rhs);	(5)
template<class Rep1, class Period1, class Rep2, class Period2> constexprbool operator>=(const duration<Rep1, Period1>& lhs,                           const duration<Rep2, Period2>& rhs);	(6)

Compares two durations.

1-2) Checks if lhs and rhs are equal, i.e. the number of ticks for the type common to both durations are equal.

3-6) Compares lhs to rhs, i.e. compares the number of ticks for the type common to both durations.

Parametri

lhs	-	durata sulla sinistra dell'operatore Original: duration on the left-hand side of the operator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
rhs	-	durata sulla destra dell'operatore Original: duration on the right-hand side of the operator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Assuming that CT =
std::common_type<std::chrono::duration<Rep1, Period1>,
                 std::chrono::duration<Rep2, Period2>>::type, then:

1) CT(lhs).count()== CT(rhs).count()

2) !(lhs == rhs)

3) CT(lhs).count()< CT(rhs).count()

4) !(rhs < lhs)

5) rhs < lhs

6) !(lhs < rhs)

Esempio

#include <chrono>#include <iostream>int main(){if(std::chrono::seconds(2)==std::chrono::milliseconds(2000))std::cout<<"2 s == 2000 ms\n";elsestd::cout<<"2 s != 2000 ms\n";   if(std::chrono::seconds(61)>std::chrono::minutes(1))std::cout<<"61 s > 1 min\n";elsestd::cout<<"61 s <= 1 min\n";   }

Output:

2 s == 2000 ms 61 s > 1 min