std::function

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

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

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)

 

Funzione oggetti

Funzione wrapper Original: Function wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
function (C++11)
mem_fn (C++11)
bad_function_call (C++11)
Associare Original: Bind The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
bind (C++11)
is_bind_expression (C++11)
is_placeholder (C++11)
_1, _2, _3, ... (C++11)
Wrapper di riferimento Original: Reference wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
reference_wrapper (C++11)
ref cref (C++11) (C++11)
Operatore wrapper Original: Operator wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
plus minus negate multiplies divides modulus logical_and logical_or logical_not	equal_to not_equal_to greater less greater_equal less_equal bit_and bit_or bit_xor
Negatori Original: Negators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unary_negate binary_negate	not1 not2
Sconsigliata a leganti e adattatori Original: Deprecated binders and adaptors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unary_function (deprecato)
binary_function (deprecato)
ptr_fun (deprecato)
pointer_to_unary_function (deprecato)
pointer_to_binary_function (deprecato)
mem_fun (deprecato)
mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (deprecato) (deprecato) (deprecato) (deprecato)
mem_fun_ref (deprecato)
mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (deprecato) (deprecato) (deprecato) (deprecato)
binder1st binder2nd (deprecato) (deprecato)
bind1st bind2nd (deprecato) (deprecato)

 

std::function

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.

function::function

function::~function

function::operator=

function::swap

function::assign

function::operator bool

function::operator()

function::target_type

function::target

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.

operator== operator!=

std::swap(std::function)

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.

std::uses_allocator<std::function>

 

Elemento definito nell'header <functional>
template<class> class function;/* undefined */		(dal C++11)
template<class R, class... Args> class function<R(Args...)>		(dal C++11)

Modello std::function classe è un general-purpose wrapper di funzione polimorfa. Le istanze di std::function in grado di memorizzare, copiare, e richiamare qualsiasi callable bersaglio - funzioni, lambda espressioni, bind espressioni, o altri oggetti funzione.

Original:

Class template std::function is a general-purpose polymorphic function wrapper. Instances of std::function can store, copy, and invoke any callable target -- functions, lambda espressioni, bind espressioni, or other function objects.

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

Membri tipi

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
result_type	R
argument_type	T se sizeof...(Args)==1 e T è il primo tipo e solo in Args... Original: T if sizeof...(Args)==1 and T is the first and only type in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first_argument_type	T1 se sizeof...(Args)==2T1 ed è il primo dei due tipi di Args... Original: T1 if sizeof...(Args)==2 and T1 is the first of the two types in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
second_argument_type	T2 se sizeof...(Args)==2 e T2 è il secondo dei due tipi di Args... Original: T2 if sizeof...(Args)==2 and T2 is the second of the two types in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Membri funzioni

(costruttore)	costruisce una nuova istanza std::function Original: constructs a new std::function instance The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
(destructor)	distrugge un'istanza std::function Original: destroys a std::function instance The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
operator=	assegna il contenuto Original: assigns the contents The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
swap	swap il contenuto Original: swaps the contents The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
assign	assegna un nuovo obiettivo Original: assigns a new target The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
operator bool	Verifica se un bersaglio valido è contenuto Original: checks if a valid target is contained The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
operator()	invoca il bersaglio Original: invokes the target The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
Mirate accesso Original: Target access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
target_type	ottiene il typeid del target memorizzato di un std::function Original: obtains the typeid of the stored target of a std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
target	ottiene un puntatore al target memorizzato di un std::function Original: obtains a pointer to the stored target of a std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)

Non membri funzioni

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)
operator== operator!=	confronta con un std::functionstd::nullptr Original: compares an std::function with std::nullptr 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)

Helper classi

std::uses_allocator<std::function> (C++11)	specializzata il tratto tipo std::uses_allocator Original: specializes the std::uses_allocator type trait The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe modello di specializzazione)

Esempio

#include <functional>#include <iostream>   struct Foo { Foo(int num): num_(num){}void print_add(int i)const{std::cout<< num_+i <<'\n';}int num_;};   void print_num(int i){std::cout<< i <<'\n';}   int main(){// store a free function std::function<void(int)> f_display = print_num; f_display(-9);   // store a lambda std::function<void()> f_display_42 =[](){ print_num(42);}; f_display_42();   // store the result of a call to std::bind std::function<void()> f_display_31337 =std::bind(print_num, 31337); f_display_31337();   // store a call to a member function std::function<void(const Foo&, int)> f_add_display =&Foo::print_add; Foo foo(314159); f_add_display(foo, 1);}

Output:

-9 42 31337 314160

Vedi anche

bad_function_call (C++11)	l'eccezione generata quando si invoca un std::function vuoto Original: the exception thrown when invoking an empty std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)
mem_fn (C++11)	crea un oggetto funzione di un puntatore a un membro Original: creates a function object out of a pointer to a member 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)