Espacios de nombres
Variantes
Acciones

Namespace aliases

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Lenguaje C++
Los temas generales
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General topics
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Control de flujo
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Flow control
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Sentencias condicionales ejecución
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Conditional execution statements
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Instrucciones de iteración
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Iteration statements
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Ir declaraciones
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Jump statements
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Funciones
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Functions
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declaración de la función
lambda declaración de la función
función de plantilla
especificador inline
especificaciones de excepción (obsoleto)
noexcept especificador (C++11)
Excepciones
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Exceptions
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Los espacios de nombres
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Namespaces
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alias de espacios de nombres
Tipos
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Types
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decltype specifier (C++11)
Los especificadores
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Specifiers
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cv especificadores
almacenamiento duración especificadores
constexpr especificador (C++11)
auto especificador (C++11)
alignas especificador (C++11)
Inicialización
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Initialization
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Los literales
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Literals
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Expresiones
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Expressions
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representaciones alternativas
Utilidades
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Utilities
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Tipos
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Types
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typedef declaration
alias de tipo de declaración (C++11)
atributos (C++11)
Lanza
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Casts
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conversiones implícitas
const_cast conversion
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De asignación de memoria
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Memory allocation
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Clases
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Classes
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Clase propiedades específicas de la función
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Class-specific function properties
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Funciones especiales miembro
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Special member functions
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Plantillas
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Templates
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clase de plantilla
función de plantilla
plantilla de especialización
paquetes de parámetros (C++11)
Varios
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Miscellaneous
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Montaje en línea
 
Alias ​​de espacios de nombres permiten al programador definir un nombre alternativo para un espacio de nombres .
Original:
Namespace aliases allow the programmer to define an alternate name for a namespace.
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Son de uso general como un atajo conveniente para los espacios de nombres largos o profundamente anidado .
Original:
They are commonly used as a convenient shortcut for long or deeply-nested namespaces.
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Contenido

[editar] Sintaxis

namespace alias_name = ns_name; (1)
namespace alias_name = ::ns_name; (2)
namespace alias_name = nested_name::ns_name; (3)

[editar] Explicación

El nuevo alias alias_name proporciona un método alternativo de acceso ns_name .
Original:
The new alias alias_name provides an alternate method of accessing ns_name.
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alias_name debe ser un nombre no utilizado previamente. alias_name es válida para la duración del ámbito en el que se introduce .
Original:
alias_name must be a name not previously used. alias_name is valid for the duration of the scope in which it is introduced.
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[editar] Ejemplo

#include <iostream>
 
namespace foo {
    namespace bar {
         namespace baz {
             int qux = 42;
         }
    }
}
 
namespace fbz = foo::bar::baz;
 
int main()
{
    std::cout << fbz::qux << '\n';
}

Output:

42

[editar] Ver también

espacio de nombres declaración
identifica un espacio de nombres
Original:
identifies a namespace
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[edit]