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<div class="t-tr-text">opérateur<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">operator</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div> new<div class="t-tr-text">, Opérateur<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">, operator</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div> new[]

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< cpp | memory | new

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C++
 
Bibliothèque d'utilitaires
 
La gestion dynamique de la mémoire
Faible niveau de gestion de la mémoire
Répartiteurs
Original:
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
Original:
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
Original:
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
Original:
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
Original:
Miscellaneous
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pointer_traits (C++11)
addressof (C++11)
align (C++11)
Bibliothèque C
Original:
C Library
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Faible niveau de gestion de la mémoire
Fonctions
Original:
Functions
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operator new
operator new[]
operator delete
operator delete[]
get_new_handler (C++11)
set_new_handler
Classes
Original:
Classes
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bad_alloc
bad_array_new_length (C++11)
nothrow_t
Types
Original:
Types
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new_handler
Objets
Original:
Objects
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nothrow
 
Défini dans l'entête <new>
void* operator new  ( std::size_t count );
 (1)
void* operator new[]( std::size_t count );
 (2)
void* operator new  ( std::size_t count, const std::nothrow_t& );
 (3)
void* operator new[]( std::size_t count, const std::nothrow_t& );
 (4)
void* operator new  ( std::size_t, void* ptr );
 (5)
void* operator new[]( std::size_t, void* ptr );
 (6)
Alloue demandé nombre d'octets. Ces fonctions sont appelées par répartition nouvelles-expressions à allouer de la mémoire dans laquelle nouvel objet sera alors initialisé .
Original:
Allocates requested number of bytes. These allocation functions are called by nouvelles-expressions to allocate memory in which new object would then be initialized.
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1-2)
Alloue count octets de mémoire libre. Appelle le pointeur renvoyé par la fonction std::get_new_handler en cas d'échec des tentatives d'allocation et répète jusqu'à ce nouveau gestionnaire ne retourne pas ou devient un pointeur NULL, date à laquelle jette std::bad_alloc .
Original:
Allocates count bytes from free store. Calls the function pointer returned by std::get_new_handler on failure and repeats allocation attempts until new handler does not return or becomes a null pointer, at which time throws std::bad_alloc.
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3-4)
Identique à 1-2, mais retourne un pointeur nul lorsque 1-2 serait std::bad_alloc jeter
Original:
Same as 1-2, but returns a null pointer when 1-2 would throw std::bad_alloc
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5-6)
ne fait rien, ptr rendements. Ces versions sont appelées par la nouvelle expression qui construisent des objets dans le stockage précédemment alloué .
Original:
does nothing, returns ptr. These versions are called by new-expression which construct objects in previously allocated storage.
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Sommaire

[modifier] Remplacement de la surcharge

Les versions 1-4) sont implicitement déclaré dans chaque unité de traduction, même si l'en-tête <new> n'est pas inclus. Ces fonctions sont' remplaçable: un fourni par l'utilisateur non membre de fonction avec la même signature remplace la version implicite. Au plus un remplacement peut être prévu pour chacun des quatre fonctions d'allocation implicites. En outre, le programme peut définir les versions de membre de classe de ces fonctions ou de définir des fonctions de répartition avec des signatures différentes (sauf qu'il n'est pas autorisé à remplacer (5-6) versions de la fonction d'allocation). La signature ajoutée devrait ressembler à ce qui suit, où count est le nombre d'octets à allouer et' placement_params sont les paramètres fournis à l'expression new:
Original:
The versions 1-4) are implicitly declared in each translation unit even if the <new> header is not included. These functions are replaceable: a user-provided non-member function with the same signature replaces the implicit version. At most one replacement may be provided for each of the four implicit allocation functions. Also, program can define class member versions of these functions or define allocation functions with different signatures (except that it is not permitted to replace (5-6) versions of the allocation function). The added signature should look like the following, where count is number of bytes to allocate and placement_params are the parameters supplied to the new expression:
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void* operator new  (size_t count/*, placement_params*/);
 for the new version
void* operator new[](size_t count/*, placement_params*/);
 for the new[] version
La fonction d'allocation peut être remplacé / surchargé de deux façons:
Original:
The allocation function can be replaced/overloaded in two ways:
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'Dans la portée globale': pour l'appeler, la signature des fonctions d'allocation de surcharge doit être visible à l'endroit de l'attribution, à l'exception des implicitement déclarés fonctions d'allocation par défaut. Cette fonction d'allocation sera utilisé pour toutes les allocations avec les paramètres correspondants dans le programme actuel
Original:
in the global scope: in order to call it, the signature of the overloaded allocation functions must be visible at the place of allocation, except for implicitly declared default allocation functions. This allocation function will be used for all allocations with corresponding parameters in the current program
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'Dans la portée locale': l'operator new surchargée doit être statique fonction membre public de la classe. Cette fonction d'allocation ne sera utilisée que pour les allocations de cette catégorie particulière .
Original:
in the local scope: the overloaded operator new must be static public member function of the class. This allocation function will be used only for allocations of that particular class.
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Lors de la compilation, chaque expression new lève les yeux pour le nom de la fonction de répartition appropriée d'abord dans le domaine de la classe et après que dans la portée globale. Il peut être chargé de sauter la première étape en appelant new que ::new. Notez que selon surcharge règles, les fonctions d'allocation déclaré dans la portée de classe se cache toutes les fonctions de répartition mondiale. Pour plus d'informations NJ expression voir. Notez qu'il n'est pas possible de placer la fonction d'allocation dans un espace de noms .
Original:
During compilation, each new expression looks up for appropriate allocation function's name firstly in the class scope and after that in the global scope. It can be instructed to skip the first step by calling new as ::new. Note, that as per surcharge règles, any allocation functions declared in class scope hides all global allocation functions. For more information see NJ expression. Note, that it is not possible to place allocation function in a namespace.
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[modifier] Paramètres

count -
nombre d'octets à allouer
Original:
number of bytes to allocate
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ptr -
pointeur vers une zone de mémoire pour initialiser l'objet à
Original:
pointer to a memory area to initialize the object at
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[modifier] Retourne la valeur

1-4)
pointeur de zone de mémoire allouée
Original:
pointer to allocated memory area
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5-6) ptr

[modifier] Exceptions

1-2)
jette std::bad_alloc en cas d'échec d'allocation de mémoire
Original:
throws std::bad_alloc on failure to allocate memory
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3-6)
noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Voir aussi
fonctions de désallocation
Original:
deallocation functions
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(fonction) [edit]
(C++11)
obtient le gestionnaire courant nouveau
Original:
obtains the current new handler
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(fonction) [edit]
enregistre un nouveau gestionnaire
Original:
registers a new handler
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(fonction) [edit]
obtient de stockage non initialisée
Original:
obtains uninitialized storage
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(fonction)
alloue de la mémoire
Original:
allocates memory
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(fonction)
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