Espacios de nombres
Variantes
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std::tuple_element<div class="t-tr-text"><std::tuple><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"><std::tuple></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>

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< cpp‎ | utility‎ | tuple
 
 
Utilidades de la biblioteca
Escriba apoyo (basic types, RTTI, type traits)
Gestión de memoria dinámica
Gestión de errores
Programa de servicios públicos
Funciones variadic
Fecha y hora
Objetos Function
(C++11)
Operadores relacionales
Original:
Relational operators
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Pares y tuplas
Original:
Pairs and tuples
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(C++11)
Cambiar, hacia adelante y mover
Original:
Swap, forward and move
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(C++11)
(C++11)
(C++11)
 
std::tuple
Las funciones miembro
Original:
Member functions
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Terceros funciones
Original:
Non-member functions
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Clases de ayuda
Original:
Helper classes
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tuple_element
 
Definido en la cabecera <tuple>
template< std::size_t I, class T >
class tuple_element; /* undefined */
(1) (desde C++11)
template< std::size_t I, class... Types >
class tuple_element< I, tuple<Types...> >;
(2) (desde C++11)
template< std::size_t I, class T >

class tuple_element< I, const T > {
  typedef typename
      std::add_const<typename std::tuple_element<I, T>::type>::type type;

};
(3) (desde C++11)
template< std::size_t I, class T >

class tuple_element< I, volatile T > {
  typedef typename
      std::add_volatile<typename std::tuple_element<I, T>::type>::type type;

};
(4) (desde C++11)
template< size_t I, class T >

class tuple_element< I, const volatile T > {
  typedef typename
      std::add_cv<typename std::tuple_element<I, T>::type>::type type;

};
(5) (desde C++11)
Proporciona compilación tipo de acceso indexado a los tipos de los elementos de la tupla .
Original:
Provides compile-type indexed access to the types of the elements of the tuple.
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Contenido

[editar] Tipos de miembros

Miembro de tipo
Original:
Member type
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Definition
type
el tipo de elemento Ith de la tupla, donde I es en [0, sizeof...(Types))
Original:
the type of Ith element of the tuple, where I is in [0, sizeof...(Types))
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[editar] Posible implementación

template< std::size_t I, class T >
struct tuple_element;
 
// recursive case
template<std::size_t I, class Head, class... Tail >
struct tuple_element<I, std::tuple<Head, Tail...>>
    : std::tuple_element<I-1, std::tuple<Tail...>> { };
 
// base case
template< class Head, class... Tail >
struct tuple_element<0, std::tuple<Head, Tail...>> {
   typedef Head type;
};

[editar] Ejemplo

[editar] Ver también

se obtiene el tipo de los elementos de array
Original:
obtains the type of the elements of array
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(especialización de plantilla de clase) [editar]
se obtiene el tipo de los elementos de pair
Original:
obtains the type of the elements of pair
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(especialización de plantilla de clase) [editar]