名前空間
変種
操作

Namespace aliases

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一般的なトピック
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General topics
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フロー制御
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Flow control
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条件付き実行文
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Conditional execution statements
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繰り返し文
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Iteration statements
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文をジャンプします
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Jump statements
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機能します
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Functions
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関数の宣言
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関数テンプレート
の歴史。インライン指定
例外仕様 (廃止予定)
noexcept指定子 (C++11)
例外
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Exceptions
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名前空間
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Namespaces
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名前空間のエイリアス
タイプ
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Types
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decltype specifier (C++11)
指定子
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Specifiers
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CV指定
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初期化
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Initialization
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リテラル
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Literals
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Expressions
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代替表現
ユーティリティ
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Utilities
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タイプ
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Types
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typedef declaration
型の別名宣言 (C++11)
属性 (C++11)
キャストします
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Casts
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const_cast conversion
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Memory allocation
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クラス
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Classes
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クラス固有の機能特性
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Class-specific function properties
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明示 (C++11)
静的
特殊なメンバ関数
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Special member functions
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テンプレート
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Templates
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クラステンプレート
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パラメーターパック (C++11)
その他
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Miscellaneous
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インラインアセンブリ
 
名前空間のエイリアスは、プログラマが名前空間の別名を定義することができます.
Original:
Namespace aliases allow the programmer to define an alternate name for a namespace.
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彼らは一般的に長い、または深くネストされた名前空間のための便利なショートカットとして使用されている.
Original:
They are commonly used as a convenient shortcut for long or deeply-nested namespaces.
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目次

[編集] 構文

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

[編集] 説明

新しいエイリアスalias_namens_nameにアクセスするための代替方法を提供しています.
Original:
The new alias alias_name provides an alternate method of accessing ns_name.
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alias_nameは、以前に使用されていない名前でなければなりません。 alias_name、それが導入されたスコープの存続期間中にのみ有効です.
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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[編集]

#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

[編集] も参照してください

名前空間の宣言
名前空間を識別します
Original:
identifies a namespace
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[edit]