std::swap - cppreference.com

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Elemento definito nell'header `<algorithm>` Elemento definito nell'header `<utility>`		(fino al c++11) (dal C++11)

`template< class T > void swap( T& a, T& b );`	(1)

`template< class T2, size_t N > void swap( T2 (&a)[N], T2 (&b)[N]);`	(2)	(dal C++11)

Scambi i valori indicati.

Original:

Exchanges the given values.

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Scambia i valori a e b.

Original:

Swaps the values a and b.

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Swap gli array a e b. In effetti le chiamate std::swap_ranges(a, a+N, b).

Original:

Swaps the arrays a and b. In effect calls std::swap_ranges(a, a+N, b).

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Parametri

a, b	-	i valori da scambiare Original: the values to be swapped The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Type requirements
-`T` must meet the requirements of `MoveAssignable` and `MoveConstructible`.
-`T2` must meet the requirements of `Swappable`.

Valore di ritorno

(Nessuno)

Original:

(none)

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Eccezioni

noexcept

specification: (dal C++11)


`noexcept(noexcept( std::is_nothrow_move_constructible<T>::value && std::is_nothrow_move_assignable<T>::value ))`

noexcept

specification: (dal C++11)


`noexcept(noexcept(swap(a, b)))`

Complessità

Constant

Original:

Constant

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Lineare in N

Original:

Linear in N

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Specializzazioni

Entrambi i corsi sono personalizzati e sovraccarichi dell'algoritmo std::swap sono permessi, ma i sovraccarichi sono in genere preferito dal specializzazioni di un modello di funzione non sono ammessi per le classi template. Le funzioni di libreria utilizzare sempre fornito dall'utente sovraccarichi durante lo scambio, se si trovano per argomento-dipendente di ricerca (come da concetto Swappable).

Original:

Both custom specializations and overloads of the std::swap algorithm are allowed, but the overloads are generally preferred since specializations of a function template aren't allowed for template classes. Library functions always use the user-provided overloads when swapping, if they are found by argument-dependent lookup (as per Swappable concept).

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Gli overload che seguono sono già fornite dalla libreria standard:

Original:

The following overloads are already provided by the standard library:

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std::swap(std::pair) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::tuple) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::shared_ptr) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::weak_ptr) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unique_ptr) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::function) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::basic_string)	specializza l'algoritmo std::swap (funzione di modello) [modifica]

std::swap(std::array)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::deque)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::forward_list)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::list)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::vector)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::map)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::multimap)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::set)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::multiset)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unordered_map)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unordered_multimap)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unordered_set)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unordered_multiset)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::queue)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::priority_queue)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::stack)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::valarray) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_stringbuf) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_istringstream) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_ostringstream) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_stringstream) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_filebuf) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::basic_ifstream) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::basic_ofstream) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::basic_fstream) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::basic_regex) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::match_results) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::thread) (C++11)	specializzata l'algoritmo std::swap Original: specializes the std::swap algorithm 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) [modifica]

std::swap(std::unique_lock) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::promise) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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::swap(std::packaged_task) (C++11)	specializzata l'algoritmo `std::swap()` Original: specializes the `std::swap()` algorithm 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)

Esempio

Vedi anche


	swap gli elementi a cui punta due iteratori Original: swaps the elements pointed to by two iterators 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) [modifica]

	Scambia due gamme di elementi Original: swaps two ranges of elements 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) [modifica]