Espacios de nombres
Variantes
Acciones

Union declaration

De cppreference.com
< cpp‎ | language

 
 
Lenguaje C++
Los temas generales
Original:
General topics
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Control de flujo
Original:
Flow control
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Sentencias condicionales ejecución
Original:
Conditional execution statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Instrucciones de iteración
Original:
Iteration statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Ir declaraciones
Original:
Jump statements
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Funciones
Original:
Functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
declaración de la función
lambda declaración de la función
función de plantilla
especificador inline
especificaciones de excepción (obsoleto)
noexcept especificador (C++11)
Excepciones
Original:
Exceptions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Los espacios de nombres
Original:
Namespaces
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Tipos
Original:
Types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
tipos de unión
tipos de funciones
decltype specifier (C++11)
Los especificadores
Original:
Specifiers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
cv especificadores
almacenamiento duración especificadores
constexpr especificador (C++11)
auto especificador (C++11)
alignas especificador (C++11)
Inicialización
Original:
Initialization
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Los literales
Original:
Literals
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Expresiones
Original:
Expressions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
representaciones alternativas
Utilidades
Original:
Utilities
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Tipos
Original:
Types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
typedef declaration
alias de tipo de declaración (C++11)
atributos (C++11)
Lanza
Original:
Casts
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
conversiones implícitas
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-cast estilo y funcional
De asignación de memoria
Original:
Memory allocation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Clases
Original:
Classes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Clase propiedades específicas de la función
Original:
Class-specific function properties
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Funciones especiales miembro
Original:
Special member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Plantillas
Original:
Templates
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
función de plantilla
plantilla de especialización
paquetes de parámetros (C++11)
Varios
Original:
Miscellaneous
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Montaje en línea
 
Un sindicato es un tipo de clase especial que almacena todos los miembros de sus datos en la misma posición de memoria .
Original:
A union is a special class type that stores all of its data members in the same memory location.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Los sindicatos no pueden tener funciones virtuales, heredar o heredar de otras clases .
Original:
Unions cannot have virtual functions, be inherited or inherit other classes.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Los sindicatos (hasta C++11) sólo puede contener tipos POD (simples datos antiguos) .
Original:
(hasta C++11) Unions can only contain POD (simples datos antiguos) types.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
(desde C++11) Si un sindicato contiene un miembro no-POD, que tiene una función definida por el usuario especial (constructor, destructor, constructor de copia o cesión de copia) que la función se elimina de forma predeterminada en el sindicato y debe ser definido explícitamente por el usuario .
Original:
(desde C++11) If a union contains a non-POD member, which has a user-defined special function (constructor, destructor, copy constructor or copy assignment) that function is deleted by default in the union and needs to be defined explicitly by the user.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Contenido

[editar] Sintaxis

union name { member_declarations } object_list (opcional) ; (1)
union { member_declarations } ; (2)

[editar] Explicación

# Denominado sindicato
Original:
#Named union
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Unión # Anonymous
Original:
#Anonymous union
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Sindicatos Anónimos

Los miembros de una unión anónima son accesibles desde el ámbito de inclusión como variables individuales .
Original:
Members of an anonymous union are accessible from the enclosing scope as single variables.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Uniones anónimas tienen más restricciones: deben tener sólo los miembros públicos y no puede tener funciones miembro .
Original:
Anonymous unions have further restrictions: they must have only public members and cannot have member functions.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Ámbito de espacio de nombres anónimos sindicatos deben ser estáticos .
Original:
Namespace-scope anonymous unions must be static.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Ejemplo

union foo
{
  int x;
  signed char y;
};
 
int main()
{
  foo.x = 128 + 896;
  std::cout << "as int: "  << (int)foo.x << '\n';
  std::cout << "as char: " << (int)foo.y << '\n';
  return 0;
}

Output:

as int: 1024
as char: 128
(Por little-endian procesadores)
Original:
(for little-endian processors)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.