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Namespace aliases

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aliases namespace
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Aliases namespace permitem ao programador definir um nome alternativo para um namespace.
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Namespace aliases allow the programmer to define an alternate name for a namespace.
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Eles são comumente usados ​​como um atalho conveniente para namespaces longas ou profundamente aninhada.
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They are commonly used as a convenient shortcut for long or deeply-nested namespaces.
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Índice

[editar] Sintaxe

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

[editar] Explicação

O novo alias alias_name fornece um método alternativo de acessar ns_name.
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The new alias alias_name provides an alternate method of accessing ns_name.
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alias_name deve ser um nome não utilizado anteriormente. alias_name é válido para o período de duração do âmbito em que são introduzidos.
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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] Exemplo

#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] Veja também

declaração de namespace
identifica um namespace
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identifies a namespace
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[edit]