std::function

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Утилиты библиотеки

Поддежка типов (базовые типы, RTTI, type traits)

Динамическое управление памятью

Обработка ошибок

Управление жизненным циклом программы

Функции с переменным числом аргументов

Дата и время

Функциональные объекты

initializer_list (C++11)

bitset

hash (C++11)

Реляционные операторы

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

Пары и кортежи

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Обмен, передача и перемещение

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Функция объектов

Функция обертки 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)
Привязка 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)
Ссылка обертки 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)
Оператор обертки 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
Negators 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
Устаревшие связующих и адаптеры 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 (устарело)
binary_function (устарело)
ptr_fun (устарело)
pointer_to_unary_function (устарело)
pointer_to_binary_function (устарело)
mem_fun (устарело)
mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (устарело) (устарело) (устарело) (устарело)
mem_fun_ref (устарело)
mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (устарело) (устарело) (устарело) (устарело)
binder1st binder2nd (устарело) (устарело)
bind1st bind2nd (устарело) (устарело)

 

std::function

Член функций 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

Не являющиеся членами функций 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)

Вспомогательные классы 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>

 

Заголовочный файл <functional>
template< class > class function; /* undefined */		(начиная с C++11)
template< class R, class... Args > class function<R(Args...)>		(начиная с C++11)

std::function класс шаблон общего назначения, полиморфные функции-оболочки. Экземпляры std::function может хранить, копировать, и ссылаться на любой вызываемый целевой - функции, лямбда-выражения, привязки выражений или других объектов функция.

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, лямбда-выражения, привязки выражений, 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.

Член типов

Type 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 если sizeof...(Args)==1 и T является первым и единственным типом в 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 если sizeof...(Args)==2 и T1 является первой из двух типов в 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 если sizeof...(Args)==2 и T2 является вторым из двух типов в 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.

Член функций

(constructor)	создает новый экземпляр 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. (public функция-член)
(destructor)	разрушает std::function экземпляр 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. (public функция-член)
operator=	присваивает содержимое 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. (public функция-член)
swap	свопы содержание 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. (public функция-член)
assign	назначает новые цели 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. (public функция-член)
operator bool	проверяет, является ли действительным цель содержится 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. (public функция-член)
operator()	вызывает в створ 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. (public функция-член)
Целевая доступа 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	получает typeid сохраненных цель 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. (public функция-член)
target	получает указатель хранится цель 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. (public функция-член)

Не являющиеся членами функций

std::swap(std::function) (C++11)	Специализируется std::swap алгоритм 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. (шаблон функции)
operator== operator!=	сравнивается с std::function std::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. (шаблон функции)

Вспомогательные классы

std::uses_allocator<std::function> (C++11)	Специализируется черта std::uses_allocator типа 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. (специализация шаблона класса)

Пример

#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);
}

Вывод:

-9
42
31337
314160

См. также

bad_function_call (C++11)	исключение при вызове пустой std::function 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. (класс)
mem_fn (C++11)	создает объект функции из указателя на член 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. (шаблон функции)