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Function template

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C++
 
Sprache C++
Allgemeine Themen
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General topics
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Flusskontrolle
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Flow control
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Bedingte Ausführung Aussagen
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Conditional execution statements
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Iterationsanweisungen
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Iteration statements
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Gehe Aussagen
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Jump statements
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Funktionen
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Functions
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Funktion Erklärung
Lambda-Funktion Erklärung
Funktions-Template
inline-Spezifizierer
Exception-Spezifikationen (veraltet)
noexcept Spezifizierer (C++11)
Ausnahmen
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Exceptions
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Namespaces
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Namespaces
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Types
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Types
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decltype specifier (C++11)
Specifiers
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Specifiers
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cv Planer
Lagerdauer Planer
constexpr Spezifizierer (C++11)
auto Spezifizierer (C++11)
alignas Spezifizierer (C++11)
Initialisierung
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Initialization
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Literale
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Literals
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Expressions
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Expressions
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alternative Darstellungen
Utilities
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Utilities
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Types
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Types
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typedef declaration
Typ Aliasdeklaration (C++11)
Attribute (C++11)
Wirft
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Casts
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impliziten Konvertierungen
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-Stil und funktionale Besetzung
Speicherzuweisung
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Memory allocation
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Classes
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Classes
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Class-spezifische Funktion Eigenschaften
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Class-specific function properties
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explizit (C++11)
statisch
Besondere Member-Funktionen
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Special member functions
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Templates
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Templates
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Klassen-Template
Funktions-Template
Template-Spezialisierung
Parameter Packs (C++11)
Verschiedenes
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Miscellaneous
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Inline Montage
 

Inhaltsverzeichnis

[Bearbeiten] Beschreibung

Vorlagen können generische Funktion Design, dass die Arbeit auf verschiedene Arten, ohne die Notwendigkeit von Umschreiben es mehrere Male
Original:
Templates allow generic function design that work on various types, without the need of rewriting it multiple times
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[Bearbeiten] Syntax

[Bearbeiten] Erklärung

template < template_arguments > function_declaration (1)
export template < template_arguments > function_declaration (2) (bis C + +11)
# Template Funktion Erklärung Referenzfehler: Für ein <ref>-Tag fehlt ein schließendes </ref>-Tag.
Original:
{{{2}}}
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# Exportierte Template-Funktion Erklärung. Die Funktion Körper kann in einer separaten Datei definiert werden Referenzfehler: Für ein <ref>-Tag fehlt ein schließendes </ref>-Tag.
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{{{2}}}
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[Bearbeiten] Argumente

class identifier (1)
typename identifier (2)
integral_type identifier (3)
class identifier = type_name (4) (seit C++11)
typename identifier = type_name (5) (seit C++11)
integral_type identifier = const_expr (6) (seit C++11)
1-2)
Innerhalb der Funktion identifier kann als eine Art verwendet werden
Original:
Inside the function identifier can be used as a type
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3)
Innerhalb der Funktion identifier kann als Konstante eingesetzt werden
Original:
Inside the function identifier can be used as a constant
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4-6)
Default-Argumente
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Default arguments
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[Bearbeiten] Spezialisierung

This section is incomplete
Reason: partial specialization
template <> ret function_name < template_args > ( func_args ) body
Spezialisierung ändert die Umsetzung der Template-Funktion für bestimmte Template-Parameter
Original:
Specialization changes the implementation of the template function for specific template parameters
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[Bearbeiten] Rufen

function_name < template_args > ( func_args ) (1)
function_name ( unambiguous_func_args ) (2)
# Explizite Template-Argumente, wenn func_args nicht perfekt überein mit den Typen wie in der Vorlage Erklärung (mit dem angegebenen template_args) die übliche Casting auftreten
Original:
# Explicit template arguments, if func_args don't match perfectly with the types as in the template declaration (with the given template_args) the usual casting will occur
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# Implicit Template-Argumente, von den Funktionsargumente abgeleitet. Keine Mehrdeutigkeit vorhanden sein können
Original:
# Implicit template arguments, deduced from the function arguments. No ambiguity can be present
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This section is incomplete
Reason: better explanation/example

[Bearbeiten] Beispiel

This section is incomplete
[edit]
template<typename T>
struct S {
    template<typename U> void foo(){}
};
 
template<typename T>
void bar()
{
    S<T>s;
    s.foo<T>(); // error: < parsed as less than operator
    s.template foo<T>(); // OK
}


[Bearbeiten] Siehe auch

[Bearbeiten] Notes

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Von „https://de.cppreference.com/mwiki/index.php?title=cpp/language/function_template&oldid=27079“