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std::uses_allocator

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Alocadores
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Allocators
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Defined in header <memory>
template< class T, class Alloc >
struct uses_allocator
(a partir do C++ 11)
Se T tem um membro allocator_type typedef que é convertível de Alloc, fornece o membro constante igual a value true. Caso contrário value é 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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Índice

Inherited from std::integral_constant

Member constants

value
[estática]
true se T uses allocator Alloc, false contrário
Original:
true if T uses allocator Alloc, false otherwise
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(membro estático público constante)

Member functions

operator bool
converte o objeto em bool, retorna value
Original:
converts the object to bool, returns value
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(função pública membro)

Member types

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

[editar] Especializações

Especializações personalizados do traço tipo std::uses_allocator são permitidos para tipos que não têm o allocator_type membro typedef mas satisfazer um dos seguintes requisitos:
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 tem um construtor que leva std::allocator_arg_t como o primeiro argumento, e 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 tem um construtor que leva Alloc como último argumento.
Original:
T has a constructor which takes Alloc as the last argument.
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Os seguintes especializações já são fornecidas pela biblioteca padrão:
Original:
The following specializations are already provided by the standard library:
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especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(especialização modelo. classe) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(modelo de função) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(modelo de função) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(modelo de função) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(especialização modelo. classe) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(especialização modelo. classe) [edit]
especializa o traço tipo std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(especialização modelo. classe) [edit]

[editar] Notas

Esta característica tipo é utilizado por std::scoped_allocator_adaptor e pode ser usado por allocators personalizados para determinar se o objecto a ser construído é-se capaz de usar um alocador (por exemplo, é um recipiente), caso em que um alocador devem ser passados ​​para o construtor.
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] Veja também

um objeto de std::allocator_arg_t tipo usado para selecionar alocador de reconhecimento de construtores
Original:
an object of type std::allocator_arg_t used to select allocator-aware constructors
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(constante) [edit]
tipo de etiqueta usada para selecionar sobrecargas alocador de reconhecimento do construtor
Original:
tag type used to select allocator-aware constructor overloads
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(classe) [edit]
implementa multi-nível alocador de multi-nível de contêineres
Original:
implements multi-level allocator for multi-level containers
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(modelo de classe) [edit]