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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

 
 
 
std::tuple
Les fonctions membres
Original:
Member functions
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tuple::tuple
tuple::operator=
tuple::swap
Tiers fonctions
Original:
Non-member functions
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make_tuple
tie
forward_as_tuple
None
operator=
operator!=
operator<
operator<=
operator>
operator>=
std::swap
get
Classes d'aide
Original:
Helper classes
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tuple_size
tuple_element
uses_allocator
ignore
 
Defined in header <tuple>
template< std::size_t I, class T >
class tuple_element; /* undefined */
(1) (depuis C++11)
template< std::size_t I, class... Types >
class tuple_element< I, tuple<Types...> >;
(2) (depuis 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) (depuis 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) (depuis 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) (depuis C++11)
Fournit la compilation type d'accès indexé à des types d'éléments du tuple .
Original:
Provides compile-type indexed access to the types of the elements of the tuple.
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Sommaire

[modifier] Types de membres

Type du membre Définition
type
le type d'élément Ith du tuple, où I est en [0, sizeof...(Types))
Original:
the type of Ith element of the tuple, where I is in [0, sizeof...(Types))
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[modifier] Mise en œuvre possible

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;
};

[modifier] Exemple

[modifier] Voir aussi

obtient le type des éléments de array
Original:
obtains the type of the elements of array
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(classe générique spécialisée) [edit]
obtient le type des éléments de pair
Original:
obtains the type of the elements of pair
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(classe générique spécialisée) [edit]