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std::negate

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
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Reference wrappers
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reference_wrapper(C++11)
ref
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Оператор обертки
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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)
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Заголовочный файл <functional>
template< class T >
struct negate;
Функция объекта для выполнения отрицания. Эффективно называет operator- на экземпляр типа T.
Original:
Function object for performing negation. Effectively calls operator- on an instance of type T.
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Содержание

[править] Член типов

Type
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Type
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Definition
result_type T
argument_type T

[править] Член функций

operator()
возвращает отрицание аргумента
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returns the negation of the argument
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(public функция-член)

зЬй :: отрицает. ::
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std::negate::
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operator()

T operator()( const T& arg ) const;

Returns the negation of arg.

Parameters

arg -
Значение для расчета отрицания
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value to compute negation of
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Return value

The result of -arg.

Exceptions

(none)

Possible implementation

T operator()(const T &arg) const
{
    return -arg;
}