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std::uses_allocator

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< cpp‎ | memory

 
 
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Gestión de memoria dinámica
Bajo la gestión de memoria de nivel
Los asignadores
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Allocators
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allocator
allocator_traits(C++11)
allocator_arg_t(C++11)
allocator_arg(C++11)
uses_allocator(C++11)
scoped_allocator_adaptor(C++11)
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C Library
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C Library
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Defined in header <memory>
template< class T, class Alloc >
struct uses_allocator
(desde C++11)
Si tiene un T allocator_type miembro typedef que es convertible de Alloc, proporciona el miembro constante value igual a true. De lo contrario value es false .
Original:
If T has a member typedef allocator_type which is convertible from Alloc, provides the member constant value equal to true. Otherwise value is false.
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Contenido

Inherited from std::integral_constant

Member constants

value
[estático]
true si T uses allocator Alloc, false lo contrario
Original:
true if T uses allocator Alloc, false otherwise
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(público miembro constante estática)

Member functions

operator bool
convierte el objeto a bool, devuelve value
Original:
converts the object to bool, returns value
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(miembro público función)

Member types

Tipo
Original:
Type
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Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Especializaciones

Especializaciones personalizadas del tipo de rasgo std::uses_allocator están permitidos para los tipos que no tienen la allocator_type typedef miembro pero que cumplan uno de los dos requisitos siguientes:
Original:
Custom specializations of the type trait std::uses_allocator are allowed for types that do not have the member typedef allocator_type but satisfy one of the following two requirements:
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1)
T tiene un constructor que toma std::allocator_arg_t como primer argumento, y Alloc como segundo argumento .
Original:
T has a constructor which takes std::allocator_arg_t as the first argument, and Alloc as the second argument.
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2)
T tiene un constructor que toma Alloc como último argumento .
Original:
T has a constructor which takes Alloc as the last argument.
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Los siguientes especialidades vienen dados por la biblioteca estándar:
Original:
The following specializations are already provided by the standard library:
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se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(clase de especialización de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(función de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(función de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(función de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(clase de especialización de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(clase de especialización de plantilla) [edit]
se especializa el rasgo tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(clase de especialización de plantilla) [edit]

[editar] Notas

Este rasgo tipo es utilizado por std::scoped_allocator_adaptor y puede ser utilizado por los asignadores personalizados para determinar si el objeto en construcción en sí es capaz de utilizar un asignador (por ejemplo, es un contenedor), en cuyo caso debe ser un asignador pasó a su constructor .
Original:
This type trait is used by std::scoped_allocator_adaptor and may be used by custom allocators to determine whether the object being constructed is itself capable of using an allocator (e.g. is a container), in which case an allocator should be passed to its constructor.
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[editar] Ver también

un objeto de tipo std::allocator_arg_t utiliza para seleccionar conscientes asignador-constructores
Original:
an object of type std::allocator_arg_t used to select allocator-aware constructors
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(constante) [edit]
tipo de variable utilizada para seleccionar conscientes asignador-sobrecargas del constructor
Original:
tag type used to select allocator-aware constructor overloads
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(clase) [edit]
implementa varios niveles asignador de niveles múltiples recipientes
Original:
implements multi-level allocator for multi-level containers
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(clase de plantilla) [edit]