Namespaces

 

C++

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Sprache C++

Allgemeine Themen Original: General topics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Preprocessor Kommentare Keywords	ASCII-Tabelle Escape-Sequenzen Geschichte von C + +
Flusskontrolle Original: Flow control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Bedingte Ausführung Aussagen Original: Conditional execution statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
if statement	switch statement
Iterationsanweisungen Original: Iteration statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
for loop range-for loop(C++11)	while loop do-while loop
Gehe Aussagen Original: Jump statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
continue statement break statement	goto statement return statement
Funktionen Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Funktion Erklärung
Lambda-Funktion Erklärung
Funktions-Template
inline-Spezifizierer
Exception-Spezifikationen(veraltet)
noexcept Spezifizierer(C++11)
Ausnahmen Original: Exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Werfen Ausdruck	try-catch-Block
Namespaces Original: Namespaces The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Namespace-Deklaration	Namespace Aliase
Types Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Grundtypen zusammengesetzte Typen Aufzählungstypen	union-Typen Funktionstypen
decltype specifier(C++11)
Specifiers Original: Specifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
cv Planer
Lagerdauer Planer
constexpr Spezifizierer(C++11)
auto Spezifizierer(C++11)
alignas Spezifizierer(C++11)
Initialisierung Original: Initialization The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Default-Initialisierung Wert der Initialisierung Null-Initialisierung Kopieren Initialisierung direkte Initialisierung	aggregierten Initialisierung Liste der Initialisierung(C++11) konstanten Initialisierung Referenz-Initialisierung

Literale Original: Literals The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Integer-Literale Zeichenliterale Fließkomma-Literale Zeichenfolgenliterale	boolean Literale nullptr(C++11) benutzerdefiniert(C++11)
Expressions Original: Expressions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Wertkategorien Reihenfolge der Auswertung	Betreiber Operatorvorrang
alternative Darstellungen
Utilities Original: Utilities The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Types Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
typedef declaration
Typ Aliasdeklaration(C++11)
Attribute(C++11)
Wirft Original: Casts The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
impliziten Konvertierungen
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-Stil und funktionale Besetzung
Speicherzuweisung Original: Memory allocation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
new expression	delete expression
Classes Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Klassendeklaration this pointer Zugriff auf Planer	Freund Spezifizierer Initialisierer Listen
Class-spezifische Funktion Eigenschaften Original: Class-specific function properties The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
virtuelle Funktion Überschreibungsspezifizierer(C++11) endgültigen Spezifizierer(C++11)	explizit(C++11) statisch
Besondere Member-Funktionen Original: Special member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Standardkonstruktor Copy-Konstruktor bewegen Konstruktor(C++11)	Kopieren Zuordnung bewegen Zuordnung(C++11) Destruktor
Templates Original: Templates The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Klassen-Template
Funktions-Template
Template-Spezialisierung
Parameter Packs(C++11)
Verschiedenes Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Inline Montage

 

Namespaces bieten ein Verfahren zur Verhinderung Namenskonflikte in großen Projekten .

Original:

Namespaces provide a method for preventing name conflicts in large projects.

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Symbole erklärt, innerhalb eines Namespace-Block in einem benannten Bereich, die sie daran hindern, für die gleichnamige Symbole in andere Bereiche verwechselt platziert werden .

Original:

Symbols declared inside a namespace block are placed in a named scope that prevents them from being mistaken for identically-named symbols in other scopes.

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Mehrere Deklarationen von Namespaces mit dem gleichen Namen sind erlaubt, was in einem Namespace einschließlich aller Symbole aller solcher Erklärungen .

Original:

Multiple declarations of namespaces with the same name are allowed, resulting in a namespace including all symbols from all such declarations.

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Syntax

namespacens_name { declarations }	(1)
inlinenamespacens_name { declarations }	(2)	(seit C++11)
ns_name::name	(3)
usingnamespacens_name;	(4)
usingns_name::name;	(5)

Erklärung

# Erklärung des Namensraums name .

Original:

# Declaration of the namespace name.

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# Erklärung des Namensraums name. Definitionen erscheint sowohl innerhalb name und seine umgebenden Namensraum

Original:

# Declaration of the namespace name. Definitions will appear both inside name and its enclosing namespace

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# Standard Methode für den Zugriff Namespace content .

Original:

# Standard way of accessing namespace content.

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# Machen alle Symbole eines Namespace zugänglich im Rahmen der using-Direktive .

Original:

# Making all symbols of a namespace accessible in the scope of the using directive.

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# Making ein spezifischer Symbole eines Namespace zugänglich im Rahmen der using-Direktive .

Original:

# Making a specific symbols of a namespace accessible in the scope of the using directive.

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Beispiel

Dieses Beispiel zeigt, wie ein Namespace verwenden, um eine Klasse, die bereits in der std Namespace benannt wurde erstellt .

Original:

This example shows how to use a namespace to create a class that already has been named in the std namespace.

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#include <vector>   namespace vec {   template<typename T >class vector {// ...};   }// of vec   int main(){std::vector<int> v1;// Standard vector. vec::vector<int> v2;// User defined vector.   v1 = v2;// Error: v1 and v2 are different object's type.   {usingnamespace std; vector<int> v3;// Same as std::vector v1 = v3;// OK}   {using vec::vector; vector<int> v4;// Same as vec::vector v2 = v4;// OK}   return0;}

Siehe auch

Namespacealias	erstellt einen Alias ​​eines vorhandenen Namespace Original: creates an alias of an existing namespace The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.