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

De cppreference.com
< cpp‎ | chrono‎ | duration

 
 
Utilidades de la biblioteca
Escriba apoyo (basic types, RTTI, type traits)
Gestión de memoria dinámica
Gestión de errores
Programa de servicios públicos
Funciones variadic
Fecha y hora
Objetos Function
(C++11)
Operadores relacionales
Original:
Relational operators
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Pares y tuplas
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Pairs and tuples
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(C++11)
Cambiar, hacia adelante y mover
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Swap, forward and move
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(C++11)
(C++11)
(C++11)
 
 
std::chrono::duration
Las funciones miembro
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Member functions
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Terceros funciones
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Non-member functions
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operator==operator!=operator<operator<=operator>operator>=
Clases de ayuda
Original:
Helper classes
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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.

[editar] Parámetros

lhs -
duración en el lado izquierdo del operador
Original:
duration on the left-hand side of the operator
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rhs -
duración en el lado derecho del operador
Original:
duration on the right-hand side of the operator
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[editar] Valor de retorno

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)

[editar] Ejemplo

#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";
 
}

Salida:

2 s == 2000 ms
61 s > 1 min