Variadic function: Difference between revisions

Revision as of 13:26, 8 November 2006

Revision as of 20:01, 24 November 2006

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In [[PHP]], [http://php.net/functions_arguments variable-length argument lists] are natively supported (without security risk) since version 4; dedicated functions (<TT>func_num_args</TT>, <TT>func_get_arg</TT>, <TT>func_get_args</TT>) allow the programmer to determine the number and values of unspecified arguments.

== Variadic functions in [[C++]] ==

The variadic function feature is going to be present in the upcoming [[C++]] language standard, [[C++0x]]; this feature is called "Variadic templates". This allows to create templates with variable number of template parameters, which can be also used to create a function with variable number of arguments:

The variadic function feature is going to be present in the upcoming [[''C++]]'' language standard, [[C++0x]]; this feature is called "Variadic templates". This allows to create templates with variable number of template parameters, which can be also used to create a function with variable number of arguments:

template<typename T>

Line 28 ⟶ 30:

}

== Variadic functions in [[C Sharp|C#]] and [[Java]] ==

Other languages, such as [[C#]] and [[Java]] use a different approach - they just allow that a variable number of arguments of the same type may be passed to a variadic function. Inside the method they are simply collected in an [[array]].

Other languages, such as [[''C#]]'' and [[''Java]]'' use a different approach - they just allow that a variable number of arguments of the same (super)type may be passed to a variadic function. Inside the method they are simply collected in an [[array]]. Using [[autoboxing]], this can also be used to pass [[Primitive type|primitive]] arguments to for example a print function, as can be seen in the Java example below:

==See also==

public static void printSpaced(Object... objects) {

[[Variadic macro]] (C Programming Language)

for (Object o : objects)

System.out.print(o + " ");

}

// Can be used to print:

// printSpaced(1, 2, "three");

==See also==

* [[Variadic macro]] (C Programming Language)

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* [[Java syntax]]