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    <metanoindex/>

     
    C++
     
    Bibliothque d'utilitaires
     
    Soutien aux types fondamentaux
    Les types de base
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    Basic types
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    Types fondamentaux
    Fixe les types entiers largeur (C++11)
    Limites numriques
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    Numeric limits
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    numeric_limits
    C numrique limite interface
    Informations sur le type d'excution
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    Runtime type information
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    Caractres de type
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    Type traits
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    Catgories de type primaire
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    Primary type categories
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    is_void (C++11)
    is_array (C++11)
    is_pointer (C++11)
    is_enum (C++11)
    is_union (C++11)
    is_class (C++11)
    is_function (C++11)
    is_object (C++11)
    is_scalar (C++11)
    is_compound (C++11)
    is_integral (C++11)
    is_floating_point (C++11)
    is_fundamental (C++11)
    is_arithmetic (C++11)
    is_reference (C++11)
    is_lvalue_reference (C++11)
    is_rvalue_reference (C++11)
    is_member_pointer (C++11)
    is_member_object_pointer (C++11)
    is_member_function_pointer (C++11)
    Les proprits du type
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    Type properties
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    is_const (C++11)
    is_volatile (C++11)
    is_pod (C++11)
    is_empty (C++11)
    is_polymorphic (C++11)
    is_abstract (C++11)
    Oprations prises en charge
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    Supported operations
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    is_constructible
    is_trivially_constructible
    is_nothrow_constructible    		 (C++11)
    (C++11)
    (C++11)
    is_default_constructible
    is_trivially_default_constructible
    is_nothrow_default_constructible    		 (C++11)
    (C++11)
    (C++11)
    is_copy_constructible
    is_trivially_copy_constructible
    is_nothrow_copy_constructible    		 (C++11)
    (C++11)
    (C++11)
    is_move_constructible
    is_trivially_move_constructible
    is_nothrow_move_constructible    		 (C++11)
    (C++11)
    (C++11)
    is_assignable
    is_trivially_assignable
    is_nothrow_assignable    		 (C++11)
    (C++11)
    (C++11)
    is_copy_assignable
    is_trivially_copy_assignable
    is_nothrow_copy_assignable    		 (C++11)
    (C++11)
    (C++11)
    is_move_assignable
    is_trivially_move_assignable
    is_nothrow_move_assignable    		 (C++11)
    (C++11)
    (C++11)
    is_destructible
    is_trivially_destructible
    is_nothrow_destructible    		 (C++11)
    (C++11)
    (C++11)
    has_virtual_destructor (C++11)
    Les relations et les requtes de proprit
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    Relationships and property queries
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    is_same (C++11)
    is_base_of (C++11)
    is_convertible (C++11)
    alignment_of (C++11)
    rank (C++11)
    extent (C++11)
    Modifications de type
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    Type modifications
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    remove_cv
    remove_const
    remove_volatile    		 (C++11)
    (C++11)
    (C++11)
    add_cv
    add_const
    add_volatile    		 (C++11)
    (C++11)
    (C++11)
    make_signed (C++11)
    make_unsigned (C++11)
    Transformations de type
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    Type transformations
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    aligned_storage (C++11)
    aligned_union (C++11)
    decay (C++11)
    enable_if (C++11)
    conditional (C++11)
    common_type (C++11)
    underlying_type (C++11)
    result_of (C++11)
    Tapez constantes traits
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    Type trait constants
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    integral_constant (C++11)
     
    <tbody> </tbody>
    Dclar dans l'en-tte <cstddef>
    Dclar dans l'en-tte <cstring>
    Dclar dans l'en-tte <cwchar>
    Dclar dans l'en-tte <ctime>
    Dclar dans l'en-tte <clocale>
    Dclar dans l'en-tte <cstdio>
    #define NULL /*implementation-defined*/
    Dfinit la constante de pointeur NULL, ce qui est un prvalue expression intgrale de constante de type entier qui value zro ou un prvalue de std::nullptr_t type. Le pointeur null constante peut tre implicitement convertie tout type pointeur, les rsultats transformation sur la valeur de pointeur null de ce type. Si la constante de pointeur nul est de type entier, il peut tre converti en un type de prvalue de std::nullptr_t .
    Original:
    Defines the null pointer constant, which is an integral constant expression prvalue of integer type that evaluates to zero or a prvalue of type std::nullptr_t. The null pointer constant may be implicitement convertie to any pointer type; such conversion results in the null pointer value of that type. If the null pointer constant has integer type, it may be converted to a prvalue of type std::nullptr_t.
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    Mise en uvre possible

    #define NULL 0
//since C++11
#define NULL nullptr

    Exemple

    #include <cstddef>
class S;
int main()
{
    int* p = NULL;
    int* p2 = static_cast<std::nullptr_t>(NULL);
    void(*f)(int) = NULL;
    int S::*mp = NULL;
    void(S::*mfp)(int) = NULL;
}


    Voir aussi

    nullptr
    le pointeur littral qui spcifie un pointeur NULL (C++11) valeur
    Original:
    the pointer literal which specifies a null pointer value (C++11)
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    [edit]
    (C++11)
    le type de la nullptr pointeur null littral
    Original:
    the type of the null pointer literal nullptr
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    (typedef) [edit]
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