std::is_bind_expression

 

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Operadores relacionales Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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

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Envoltorios de función 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)
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bad_function_call (C++11)
Enlazar 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)
Envolturas de referencia 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)
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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
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
Desaprobado aglutinantes y adaptadores 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 (obsoleto)
binary_function (obsoleto)
ptr_fun (obsoleto)
pointer_to_unary_function (obsoleto)
pointer_to_binary_function (obsoleto)
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mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (obsoleto) (obsoleto) (obsoleto) (obsoleto)
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mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (obsoleto) (obsoleto) (obsoleto) (obsoleto)
binder1st binder2nd (obsoleto) (obsoleto)
bind1st bind2nd (obsoleto) (obsoleto)

 

Defined in header <functional>
template< class T > struct is_bind_expression;		(ya que C + +11)

Si T es el tipo producido por una llamada a std::bind, esta plantilla proporciona el miembro constante value true igual. Para cualquier otro tipo, es value false .

Original:

If T is the type produced by a call to std::bind, this template provides the member constant value equal true. For any other type, value is false.

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Esta plantilla puede ser especializado para un tipo definido por el usuario que debe ser tratado por std::bind como si fuera la de una subexpresión dilema: cuando un objeto función bind generada se invoca un argumento consolidado de este tipo se invocará en función objeto y se le dará todos los argumentos pasados ​​no consolidados con el objeto de vinculación generado por el .

Original:

This template may be specialized for a user-defined type which should be treated by std::bind as if it was the type of a bind subexpression: when a bind-generated function object is invoked, a bound argument of this type will be invoked as a function object and will be given all the unbound arguments passed to the bind-generated object.

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Inherited from std::integral_constant

Member constants

value [estático]	true si T is a function object generated by std::bind, false lo contrario Original: true if T is a function object generated by std::bind, false otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (público miembro constante estática)

Member functions

operator bool	convierte el objeto a bool, devuelve value Original: converts the object to bool, returns value 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)

Member types

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
value_type	bool
type	std::integral_constant<bool, value>

Ejemplo

#include <iostream>
#include <type_traits>
#include <functional>
 
struct MyBind {
    typedef int result_type;
    int operator()(int a, int b) const { return a + b; }
};
 
namespace std {
    template<>
    struct is_bind_expression<MyBind> : public true_type {};
}
 
int f(int n1, int n2)
{
    return n1+n2;
}
 
int main()
{
    // as if bind(f, bind(MyBind::operator(), _1, _2), 2)
    auto b = std::bind(f, MyBind(), 2); 
 
    std::cout << "Adding 2 to the sum of 10 and 11 gives " << b(10, 11) << '\n';
}

Output:

Adding 2 to the sum of 10 and 11 gives 23

Ver también

bind (C++11)	se une uno o más argumentos a un objeto de función Original: binds one or more arguments to a function 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)