Namespace aliases
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Alias d'espace de noms permettent au programmeur de définir un autre nom pour un espace de noms .
Original:
Namespace aliases allow the programmer to define an alternate name for a namespace.
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Ils sont couramment utilisés comme un raccourci commode pour les espaces de noms longs ou profondément imbriquée .
Original:
They are commonly used as a convenient shortcut for long or deeply-nested namespaces.
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Sommaire |
[modifier] Syntaxe
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) | ||||||||
[modifier] Explication
Le nouvel alias alias_name fournit une méthode alternative d'accéder ns_name .
Original:
The new alias alias_name provides an alternate method of accessing ns_name.
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alias_name doit être un nom qui n'est pas déjà utilisé. alias_name est valable pour la durée de l'étendue dans laquelle elle est introduite .
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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[modifier] Exemple
#include <iostream> namespace foo { namespace bar { namespace baz { int qux = 42; } } } namespace fbz = foo::bar::baz; int main() { std::cout << fbz::qux << '\n'; }
Résultat :
42
[modifier] Voir aussi
| déclaration d'espace | identifie un espace de noms
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. |
