std::get(std::pair)

 

C++

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Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Utilità libreria

Tipo di supporto (basic types, RTTI, type traits)

Gestione della memoria dinamica

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Programma di utilità

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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)

 

std::pair

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair::pair

pair::operator=

pair::swap

Non membri funzioni Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

make_pair

operator= operator!= operator< operator<= operator> operator>=

std::swap

get (C++11)

Helper classi Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

tuple_size (C++11)

tuple_element (C++11)

 

template< size_t N, class T1, class T2 > typename std::tuple_element<I, std::pair<T1,T2>>::type&     get( pair<T1, T2>& p );	(1)	(dal C++11)
template< size_t N, class T1, class T2 > consttypename std::tuple_element<I, std::pair<T1,T2>>::type&     get(const pair<T1,T2>& p );	(2)	(dal C++11)
template< size_t N, class T1, class T2 > typename std::tuple_element<I, std::pair<T1,T2>>::type&&     get(std::pair<T1,T2>&& p );	(3)	(dal C++11)

Estrae un elemento dalla coppia con tupla-come l'interfaccia.

Original:

Extracts a element from the pair using tuple-like interface.

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Parametri

p

-

coppia il cui contenuto da estrarre Original: pair whose contents to extract The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

1-2)

Restituisce p.first se N==0 e p.second se N==1.

Original:

Returns p.first if N==0 and p.second if N==1.

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3)

Restituisce std::forward<T1&&>(p.first) se N==0 e std::forward<T2&&>(p.second) se N==1

Original:

Returns std::forward<T1&&>(p.first) if N==0 and std::forward<T2&&>(p.second) if N==1

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Eccezioni

1-3)

noexcept specification:  

noexcept

  (dal C++11)

Esempio

#include <iostream>#include <utility>   int main(){auto p =std::make_pair(1, 3.14);std::cout<<'('<< std::get<0>(p)<<", "<< std::get<1>(p)<<')'<<std::endl;}

Output:

(1, 3.14)

Vedi anche

std::get(std::tuple)	tupla accede elemento specificato Original: tuple accesses specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)
std::get(std::array)	accesses an element of an array (funzione di modello)