std::function::operator()

 

C++

Langage

Concepts

Bibliothèque d'utilitaires

Bibliothèque pour les chaînes de caractères

Bibliothèque de conteneurs

Bibliothèque d'algorithmes

Bibliothèque d'itérateurs

Bibliothèque pour le calcul numérique

Bibliothèque pour les entrées/sorties

Bibliothèque pour la régionalisation

Bibliothèque pour les expressions régulières (C++11)

Bibliothèque pour les opérations atomiques (C++11)

Bibliothèque pour les processus légers (threads) (C++11)

 

Bibliothèque d'utilitaires

Soutien des types fondamentaux (basic types, RTTI, type traits)

Gestion dynamique de la mémoire

Gestion d'erreur

Soutien à l'exécution

Fonctions variadic

Date et heure

Foncteurs

initializer_list (C++11)

bitset

hash (C++11)

Opérateurs relationnels

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Paires et tuples

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

swap, forward et move

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Objets Function

Emballages de fonction 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)
Lier 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)
Emballages de référence 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)
Emballages opérateur 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
Négateurs 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
Obsolète liants et des adaptateurs 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 (obsolète)
binary_function (obsolète)
ptr_fun (obsolète)
pointer_to_unary_function (obsolète)
pointer_to_binary_function (obsolète)
mem_fun (obsolète)
mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (obsolète) (obsolète) (obsolète) (obsolète)
mem_fun_ref (obsolète)
mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (obsolète) (obsolète) (obsolète) (obsolète)
binder1st binder2nd (obsolète) (obsolète)
bind1st bind2nd (obsolète) (obsolète)

 

std::function

Les fonctions membres 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

Tiers fonctions 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)

Classes d'aide 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>

 

R operator()( ArgTypes... args)const;		(depuis C++11)

Appelle la fonction stockée cible appelable avec les paramètres args .

Original:

Calls the stored callable function target with the parameters args.

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Paramètres

args

-

paramètres à passer à la cible appelable fonction stockée Original: parameters to pass to the stored callable function target The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Retourne la valeur

Aucun si R est void. Sinon, la valeur de retour de l'invocation de l'objet stocké appelable .

Original:

None if R is void. Otherwise the return value of the invocation of the stored callable object.

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Exceptions

• std::bad_function_call si *this ne stocke pas une cible fonction accessible, !*this ==true .

  Original:

  std::bad_function_call if *this does not store a callable function target, !*this ==true.

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Exemple

L'exemple suivant montre comment std::function peut passer à d'autres fonctions par valeur. En outre, il montre comment std::function peut stocker lambdas .

Original:

The following example shows how std::function can passed to other functions by value. Also, it shown how std::function can store lambdas.

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#include <iostream>#include <functional>   void call(std::function<int()> f)// can be passed by value{std::cout<< f()<<'\n';}   int normal_function(){return42;}   int main(){int n =1;std::function<int()> f =[&n](){return n;}; call(f);   n =2; call(f);   f = normal_function; call(f);}

Résultat :

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