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std::unique_ptr::operator bool

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< cpp‎ | memory‎ | unique ptr

 
 
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
Original:
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)
 
Gestión de memoria dinámica
Bajo la gestión de memoria de nivel
Los asignadores
Original:
Allocators
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Inicializar el almacenamiento
Original:
Uninitialized storage
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Punteros inteligentes
Original:
Smart pointers
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(C++11)
(C++11)
(C++11)
(obsoleto)
(C++11)
Garbage soporte colección
Original:
Garbage collection support
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Varios
Original:
Miscellaneous
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(C++11)
(C++11)
C Library
Original:
C Library
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std :: unique_ptr
Las funciones miembro
Original:
Member functions
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Modificadores
Original:
Modifiers
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Los observadores
Original:
Observers
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unique_ptr::operator bool
Terceros funciones
Original:
Non-member functions
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explicit operator bool() const;
(desde C++11)
Comprueba si *this posee un objeto, es decir, si get() == nullptr .
Original:
Checks whether *this owns an object, i.e. whether get() == nullptr.
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Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

true *this si posee un objeto, false de otra manera .
Original:
true if *this owns an object, false otherwise.
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ejemplo

#include <iostream>
#include <memory>
 
int main()
{
    std::unique_ptr<int> ptr(new int(42));
 
    if (ptr) std::cout << "before reset, ptr is: " << *ptr << '\n';
    ptr.reset();
    if (ptr) std::cout << "after reset, ptr is: " << *ptr << '\n';
}

Salida:

before reset, ptr is: 42

[editar] Ver también

devuelve un puntero al objeto gestionado
Original:
returns a pointer to the managed object
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(función miembro público) [editar]