Espacios de nombres
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std::function::operator()

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< cpp‎ | utility‎ | functional‎ | function
 
 
Utilidades de la biblioteca
Escriba apoyo (basic types, RTTI, type traits)
Gestión de memoria dinámica
Gestión de errores
Programa de servicios públicos
Funciones variadic
Fecha y hora
Objetos Function
(C++11)
Operadores relacionales
Original:
Relational operators
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Pares y tuplas
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Pairs and tuples
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(C++11)
Cambiar, hacia adelante y mover
Original:
Swap, forward and move
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(C++11)
(C++11)
(C++11)
 
Objetos Function


Envoltorios de función
Original:
Function wrappers
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(C++11)
(C++11)
Enlazar
Original:
Bind
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(C++11)
Envolturas de referencia
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Reference wrappers
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(C++11)(C++11)
Envoltorios Operador
Original:
Operator wrappers
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Negadores
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Negators
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Desaprobado aglutinantes y adaptadores
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Deprecated binders and adaptors
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(obsoleto)
(obsoleto)
(obsoleto)
(obsoleto)
(obsoleto)(obsoleto)(obsoleto)(obsoleto)
(obsoleto)
(obsoleto)(obsoleto)
(obsoleto)(obsoleto)
 
std::function
Las funciones miembro
Original:
Member functions
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function::operator()
Terceros funciones
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Non-member functions
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Clases de ayuda
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Helper classes
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R operator()( ArgTypes... args ) const;
(desde C++11)

Calls the stored callable function target with the parameters args.

Contenido

[editar] Parámetros

args - parameters to pass to the stored callable function target

[editar] Valor de retorno

None if R is void. Otherwise the return value of the invocation of the stored callable object.

[editar] Excepciones

[editar] Ejemplo

The following example shows how std::function can passed to other functions by value. Also, it shown how std::function can store lambdas.

#include <iostream>
#include <functional>
 
void call(std::function<int()> f)  // can be passed by value
{ 
    std::cout << f() << '\n';
}
 
int normal_function() 
{
    return 42;
}
 
int main()
{
    int n = 1;
    std::function<int()> f = [&n](){ return n; };
    call(f);
 
    n = 2;
    call(f); 
 
    f = normal_function; 
    call(f);
}

Salida:

1
2
42

[editar] Ver también