Пространства имён
Варианты
Действия

operator==,!=(std::function)

Материал из cppreference.com

 
 
 
Функция объектов
Функция обертки
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Function wrappers
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function(C++11)
mem_fn(C++11)
bad_function_call(C++11)
Привязка
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Bind
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bind(C++11)
is_bind_expression(C++11)
is_placeholder(C++11)
_1, _2, _3, ...(C++11)
Ссылка обертки
Original:
Reference wrappers
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reference_wrapper(C++11)
ref
cref
(C++11)
(C++11)
Оператор обертки
Original:
Operator wrappers
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Negators
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Negators
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Устаревшие связующих и адаптеры
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Deprecated binders and adaptors
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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
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Member functions
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function::function
function::~function
function::operator=
function::swap
function::assign
function::operator bool
function::operator()
function::target_type
function::target
Не являющиеся членами функций
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Non-member functions
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operator==
operator!=
std::swap(std::function)
Вспомогательные классы
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Helper classes
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std::uses_allocator<std::function>
 
template< class R, class... ArgTypes >
bool operator==( const function<R(ArgTypes...)>& f, std::nullptr_t );
(1)
template< class R, class... ArgTypes >
bool operator==( std::nullptr_t, const function<R(ArgTypes...)>& f );
(2)
template< class R, class... ArgTypes >
bool operator!=( const function<R(ArgTypes...)>& f, std::nullptr_t );
(3)
template< class R, class... ArgTypes >
bool operator!=( std::nullptr_t, const function<R(ArgTypes...)>& f );
(4)
Сравнивает std::function с нулевого указателя.
Original:
Compares a std::function with a null pointer.
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[править] Параметры

f -
std::function для сравнения
Original:
std::function to compare
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[править] Возвращаемое значение

1-2) !f

3-4) (bool) f

[править] Пример