Namespace
Varianti

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

Da cppreference.com.
< cpp‎ | chrono‎ | duration

 
 
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)
 
 
std::chrono::duration
Membri funzioni
Original:
Member functions
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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
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common_type
operator+
operator-
operator*
operator/
operator%
operator==
operator!=
operator<
operator<=
operator>
operator>=
duration_cast
Helper classi
Original:
Helper classes
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treat_as_floating_point
duration_values
 
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool operator==(const duration<Rep1, Period1>& lhs,

                          const duration<Rep2, Period2>& rhs);
(1)
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool operator!=(const duration<Rep1, Period1>& lhs,

                          const duration<Rep2, Period2>& rhs);
(2)
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool operator<(const duration<Rep1, Period1>& lhs,

                         const duration<Rep2, Period2>& rhs);
(3)
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool operator<=(const duration<Rep1, Period1>& lhs,

                          const duration<Rep2, Period2>& rhs);
(4)
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool operator>(const duration<Rep1, Period1>& lhs,

                         const duration<Rep2, Period2>& rhs);
(5)
template <class Rep1, class Period1, class Rep2, class Period2>

constexpr bool 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.

[modifica] Parametri

lhs -
durata sulla sinistra dell'operatore
Original:
duration on the left-hand side of the operator
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rhs -
durata sulla destra dell'operatore
Original:
duration on the right-hand side of the operator
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[modifica] 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)

[modifica] Esempio

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

Output:

2 s == 2000 ms
61 s > 1 min