Namespace aliases
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Aliases namespace permitem ao programador definir um nome alternativo para um namespace.
Original:
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.
Original:
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;
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(1) | ||||||||
namespace alias_name = ::ns_name;
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(2) | ||||||||
namespace alias_name = nested_name::ns_name;
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(3) | ||||||||
[editar] Explicação
O novo alias alias_name fornece um método alternativo de acessar ns_name.
Original:
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.
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] Exemplo
#include <iostream> namespace foo { namespace bar { namespace baz { int qux = 42; } } } namespace fbz = foo::bar::baz; int main() { std::cout << fbz::qux << '\n'; }
Saída:
42
[editar] Veja também
| declaração de namespace | identifica um namespace
Original: identifies a namespace The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
