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std::chrono::duration

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< cpp‎ | chrono


 
 
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
initializer_list(C++11)
bitset
hash(C++11)
Operadores relacionales
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Pares y tuplas
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Cambiar, hacia adelante y mover
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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
Las funciones miembro
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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%=
Terceros funciones
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Non-member functions
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common_type
operator+
operator-
operator*
operator/
operator%
operator==
operator!=
operator<
operator<=
operator>
operator>=
duration_cast
Clases de ayuda
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Helper classes
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treat_as_floating_point
duration_values
 
Defined in header <chrono>
template<

    class Rep,
    class Period = std::ratio<1>

> class duration;
(desde C++11)

Class template std::chrono::duration represents a time interval.

It consists of a count of ticks of type Rep and a tick period, where the tick period is a compile-time rational constant representing the number of seconds from one tick to the next.

The only data stored in a duration is a tick count of type Rep. If Rep is floating point, then the duration can represent fractions of ticks. Period is included as part of the duration's type, and is only used when converting between different durations.

Contenido

[editar] Tipos de miembros

Miembro de tipo
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Member type
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Definition
rep Rep, an arithmetic type representing the number of ticks
period Period, a std::ratio representing the tick period (i.e. the number of seconds per tick)

[editar] Las funciones miembro

construye nueva duración
Original:
constructs new duration
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(miembro público función) [edit]
asigna el contenido
Original:
assigns the contents
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(miembro público función) [edit]
devuelve el número de garrapatas
Original:
returns the count of ticks
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(miembro público función) [edit]
[estático]
returns the special duration value zero
(miembro estático público función) [edit]
[estático]
devuelve el valor especial de duración min
Original:
returns the special duration value min
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(miembro estático público función) [edit]
[estático]
devuelve el valor máximo de duración especial
Original:
returns the special duration value max
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(miembro estático público función) [edit]
implementa + unario y - unario
Original:
implements unary + and unary -
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(miembro público función) [edit]
aumenta o disminuye el contador
Original:
increments or decrements the tick count
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(miembro público función) [edit]
implementa asignación compuesta entre dos duraciones
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implements compound assignment between two durations
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(miembro público función) [edit]

[editar] Non-member types

Tipo
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Type
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Definition
std::chrono::nanoseconds duration type with Period std::nano
std::chrono::microseconds duration type with Period std::micro
std::chrono::milliseconds duration type with Period std::milli
std::chrono::seconds duration type with Period std::ratio<1>
std::chrono::minutes duration type with Period std::ratio<60>
std::chrono::hours duration type with Period std::ratio<3600>

[editar] Terceros funciones

se especializa el rasgo std::common_type
Original:
specializes the std::common_type trait
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(clase de especialización de plantilla) [edit]
implementa las operaciones aritméticas con duraciones como argumentos
Original:
implements arithmetic operations with durations as arguments
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(función de plantilla) [edit]
compara dos duraciones
Original:
compares two durations
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(función de plantilla) [edit]
convierte una duración a otra, con un intervalo de garrapata diferente
Original:
converts a duration to another, with a different tick interval
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(función de plantilla) [edit]

[editar] Clases de ayuda

indicates that a duration is convertible to duration with different tick period
(clase de plantilla)
constructs zero, min, and max values of a tick count of given type
(clase de plantilla)

[editar] Ejemplo

This example shows how to define several custom duration types and convert between types:

#include <iostream>
#include <chrono>
 
int main()
{
    typedef std::chrono::duration<int, std::ratio<1, 100000000>> shakes;
    typedef std::chrono::duration<int, std::centi> jiffies;
    typedef std::chrono::duration<float, std::ratio<12096,10000>> microfortnights;
    typedef std::chrono::duration<float, std::ratio<3155,1000>> nanocenturies;
 
    std::chrono::seconds sec(1);
 
    std::cout << "1 second is:\n";
 
    std::cout << std::chrono::duration_cast<shakes>(sec).count()
              << " shakes\n";
    std::cout << std::chrono::duration_cast<jiffies>(sec).count()
              << " jiffies\n";
    std::cout << std::chrono::duration_cast<microfortnights>(sec).count()
              << " microfortnights\n";
    std::cout << std::chrono::duration_cast<nanocenturies>(sec).count()
              << " nanocenturies\n";
}

Output:

1 second is:
100000000 shakes
100 jiffies
0.82672 microfortnights
0.316957 nanocenturies