std::unary_negate

 

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

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Negadores 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
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Defined in header <functional>
template< class Predicate > struct unary_negate : public std::unary_function<Predicate::argument_type, bool>;		(hasta C + +11)
template< class Predicate > struct unary_negate;		(ya que C + +11)

unary_negate es un objeto de función de contenedor de devolver el complemento del predicado unario que posee .

Original:

unary_negate is a wrapper function object returning the complement of the unary predicate it holds.

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El tipo de predicado unario debe definir un tipo de miembro, argument_type, que se puede convertir en el tipo de parámetro del predicado. Los objetos de la función unarios obtenidos de std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, o de otra llamada a std::not1 han definido este tipo, como son objetos función derivada de la std::unary_function obsoleto .

Original:

The unary predicate type must define a member type, argument_type, that is convertible to the predicate's parameter type. The unary function objects obtained from std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, or from another call to std::not1 have this type defined, as are function objects derived from the deprecated std::unary_function.

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unary_negate objetos se construyen fácilmente con función auxiliar std::not1 .

Original:

unary_negate objects are easily constructed with helper function std::not1.

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Tipos de miembros

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
argument_type	Predicate::argument_type
result_type	bool

Las funciones miembro

(constructor)	constructs a new unary_negate object with the supplied predicate (miembro público función)
operator()	devuelve el complemento lógico del resultado de una llamada al predicado almacenado Original: returns the logical complement of the result of a call to the stored predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)

std :: unary_negate ::

Original:

std::unary_negate::

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unary_negate

explicit unary_negate( Predicate const& pred );

Constructs a unary_negate function object with the stored predicate pred.

Parameters

pred

-

predicado objeto de función Original: predicate function object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

std :: unary_negate ::

Original:

std::unary_negate::

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operator()

bool operator()( argument_type const& x ) const;

Returns the logical complement of the result of calling pred(x).

Parameters

x

-

argumento para pasar a través de predicado Original: argument to pass through to predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Return value

The logical complement of the result of calling pred(x).

Ejemplo

#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
 
struct less_than_7 : std::unary_function<int, bool>
{
    bool operator()(int i) const { return i < 7; }
};
 
int main()
{
    std::vector<int> v;
    for (int i = 0; i < 10; ++i) v.push_back(i);
 
    std::unary_negate<less_than_7> not_less_than_7((less_than_7()));
 
    std::cout << std::count_if(v.begin(), v.end(), not_less_than_7);
 
    /* C++11 solution:
        // Use std::function<bool (int)>
        std::function<bool (int)> not_less_than_7 =
            [](int x)->bool{ return !less_than_7()(x); };
 
        std::cout << std::count_if(v.begin(), v.end(), not_less_than_7);
    */
}

Output:

3

Ver también

binary_negate	objeto contenedor función que devuelve el complemento del predicado binario que contiene Original: wrapper function object returning the complement of the binary predicate it holds The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)
function (C++11)	envuelve objeto que se puede llamar de cualquier tipo con la firma especificada llamada de función Original: wraps callable object of any type with specified function call signature The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)
not1	construye std::unary_negate objeto personalizado Original: constructs custom std::unary_negate object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función de plantilla)
ptr_fun (obsoleto)	crea un adaptador compatible con envoltura objeto de la función de puntero a función Original: creates an adaptor-compatible function object wrapper from a pointer to function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función de plantilla)
unary_function (obsoleto)	adaptador compatible con la clase base de la función unaria Original: adaptor-compatible unary function base class The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)