Varianti

    std::rank

    Da cppreference.com.

    Questa pagina è stata tradotta in modo automatico dalla versione in ineglese della wiki usando Google Translate.

    La traduzione potrebbe contenere errori e termini strani. Muovi il puntatore sopra al testo per vedere la versione originale. Puoi aiutarci a correggere gli gli errori. Per ulteriori istruzioni clicca qui.

    Click here for the English version of this page

    <metanoindex/>

     
    C++
     
    Utilità libreria
    Tipo di supporto (basic types, RTTI, type traits)
    Gestione della memoria dinamica
    La gestione degli errori
    Programma di utilità
    Funzioni variadic
    Data e ora
    Funzione oggetti
    initializer_list(C++11)
    bitset
    hash(C++11)
    Gli operatori relazionali
    Original:
    Relational operators
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    rel_ops::operator!=
    rel_ops::operator>
    rel_ops::operator<=
    rel_ops::operator>=
    Coppie e tuple
    Original:
    Pairs and tuples
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    pair
    tuple(C++11)
    piecewise_construct_t(C++11)
    piecewise_construct(C++11)
    Swap, in avanti e spostare
    Original:
    Swap, forward and move
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    swap
    forward(C++11)
    move(C++11)
    move_if_noexcept(C++11)
    declval(C++11)
     
    Tipo di supporto
    Tipi base
    Original:
    Basic types
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Tipi fondamentali
    Larghezza fissa interi tipi (C++11)
    Limiti numerici
    Original:
    Numeric limits
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    numeric_limits
    C numerico limita interfaccia
    Informazioni sul tipo di runtime
    Original:
    Runtime type information
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Tipo tratti
    Original:
    Type traits
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Categorie di tipo primario
    Original:
    Primary type categories
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    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)
    Proprietà del tipo
    Original:
    Type properties
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    is_const(C++11)
    is_volatile(C++11)
    is_pod(C++11)
    is_empty(C++11)
    is_polymorphic(C++11)
    is_abstract(C++11)
    Operazioni supportate
    Original:
    Supported operations
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    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)
    I rapporti e le query di proprietà
    Original:
    Relationships and property queries
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    is_same(C++11)
    is_base_of(C++11)
    is_convertible(C++11)
    alignment_of(C++11)
    rank(C++11)
    extent(C++11)
    Tipo modifiche
    Original:
    Type modifications
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    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)
    Tipo di trasformazioni
    Original:
    Type transformations
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    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)
    Digitare costanti tratto
    Original:
    Type trait constants
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    integral_constant(C++11)
     
    <tbody> </tbody>
    Elemento definito nell'header <type_traits>
    template< class T > struct rank;
    		 (dal C++11)

    If T is an array type, provides the member constant value equal to the number of dimensions of the array. For any other type, value is 0.

    Inherited from std::integral_constant

    Member constants

    value
    [statico]
    		 the number of dimensions of T or zero
    (pubblico membro statico costante)

    Member functions

    operator std::size_t
    converte l'oggetto in std::size_t, restituisce value
    Original:
    converts the object to std::size_t, returns value
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    (metodo pubblico)

    Member types

    Tipo
    Original:
    Type
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    		 Definition
    value_type std::size_t
    type std::integral_constant<std::size_t, value>

    Possibile implementazione

    template<class T>
struct rank : std::integral_constant<std::size_t, 0> {};

template<class T>
struct rank<T[]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {};

template<class T, size_t N>
struct rank<T[N]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {};

    Esempio

    #include <iostream>
#include <type_traits>

int main()
{
    std::cout << std::rank<int[1][2][3]>::value << '\n';
    std::cout << std::rank<int[][2][3][4]>::value << '\n';
    std::cout << std::rank<int>::value << '\n';
}

    Output: 

    3
4
0

    Vedi anche

    (C++11)
    Verifica se un tipo è un tipo di matrice
    Original:
    checks if a type is an array type
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    (classe template) [modifica]
    (C++11)
    ottiene la dimensione di un tipo di matrice lungo una dimensione specificata
    Original:
    obtains the size of an array type along a specified dimension
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    (classe template) [modifica]
    (C++11)
    rimuove una misura dal tipo di matrice specificato
    Original:
    removes one extent from the given array type
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    (classe template) [modifica]
    (C++11)
    		 removes all extents from the given array type
    (classe template) [modifica]