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std::uses_allocator

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< cpp‎ | memory

 
 
 
La gestion dynamique de la mémoire
Faible niveau de gestion de la mémoire
Répartiteurs
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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)
Non initialisée stockage
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Uninitialized storage
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uninitialized_copy
uninitialized_copy_n (C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
Pointeurs intelligents
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Smart pointers
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unique_ptr (C++11)
shared_ptr (C++11)
weak_ptr (C++11)
auto_ptr (obsolète)
owner_less (C++11)
enable_shared_from_this (C++11)
bad_weak_ptr (C++11)
default_delete (C++11)
Soutien garbage collection
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Garbage collection support
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declare_reachable (C++11)
undeclare_reachable (C++11)
declare_no_pointers (C++11)
undeclare_no_pointers (C++11)
pointer_safety (C++11)
get_pointer_safety (C++11)
Divers
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Miscellaneous
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pointer_traits (C++11)
addressof (C++11)
align (C++11)
Bibliothèque C
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C Library
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Defined in header <memory>
template< class T, class Alloc >
struct uses_allocator
(depuis C++11)
Si T a une allocator_type membre typedef qui est convertible à partir Alloc, fournit du membre de constante égale à value true. Sinon value est 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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Sommaire

Inherited from std::integral_constant

Member constants

value
[
statique
Original:
static
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]
true si T uses allocator Alloc, false autrement
Original:
true if T uses allocator Alloc, false otherwise
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(constante membre statique publique)

Member functions

operator bool
convertit l'objet en bool, retourne value
Original:
converts the object to bool, returns value
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(fonction membre publique)

Member types

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

[modifier] Spécialisations

Spécialisations personnalisés de ce trait de type std::uses_allocator sont autorisés pour les types qui n'ont pas la allocator_type membre typedef, mais satisfaire à l'une des deux conditions suivantes:
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 a un constructeur qui prend std::allocator_arg_t comme premier argument, et Alloc comme second argument .
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 a un constructeur qui prend Alloc comme dernier argument .
Original:
T has a constructor which takes Alloc as the last argument.
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Les spécialisations suivantes sont déjà fournis par la bibliothèque standard:
Original:
The following specializations are already provided by the standard library:
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se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(classe générique spécialisée) [edit]
se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(fonction générique) [edit]
se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(fonction générique) [edit]
se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(fonction générique) [edit]
spécialise std::uses_allocator
(classe générique spécialisée) [edit]
se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(classe générique spécialisée) [edit]
se spécialise le trait de type std::uses_allocator
Original:
specializes the std::uses_allocator type trait
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(classe générique spécialisée) [edit]

[modifier] Notes

Ce trait type est utilisé par std::scoped_allocator_adaptor et peut être utilisé par les répartiteurs personnalisés afin de déterminer si l'objet en cours de construction est lui-même capable d'utiliser un allocateur (par exemple un conteneur), auquel cas un allocateur doit être transmis à son constructeur .
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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[modifier] Voir aussi

un objet de std::allocator_arg_t type utilisé pour sélectionner allocateur-aware constructeurs
Original:
an object of type std::allocator_arg_t used to select allocator-aware constructors
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(constante) [edit]
type de variable utilisé pour sélectionner surcharges de constructeur allocateur-aware
Original:
tag type used to select allocator-aware constructor overloads
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(classe) [edit]
met en oeuvre plusieurs niveaux d'affectation de niveaux multiples récipients
Original:
implements multi-level allocator for multi-level containers
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(classe générique) [edit]