Namespace aliases – cppreference.com
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Namespace Aliase ermöglichen es dem Programmierer, um einen alternativen Namen für eine Namespace definieren .
Original:
Namespace aliases allow the programmer to define an alternate name for a namespace.
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Sie werden üblicherweise als eine bequeme Abkürzung für lange oder tief verschachtelten Namespaces verwendet .
Original:
They are commonly used as a convenient shortcut for long or deeply-nested namespaces.
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Syntax
namespace alias_name = ns_name;
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namespace alias_name = ::ns_name;
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namespace alias_name = nested_name::ns_name;
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Erklärung
Die neuen Alias alias_name bietet eine alternative Methode für den Zugriff ns_name .
Original:
The new alias alias_name provides an alternate method of accessing ns_name.
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alias_name muss ein Name bisher nicht verwendet werden. alias_name ist für die Dauer der Rahmen in den sie eingeführt gültige .
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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Beispiel
#include <iostream> namespace foo { namespace bar { namespace baz { int qux = 42; } } } namespace fbz = foo::bar::baz; int main() { std::cout << fbz::qux << '\n'; }
Output: