std::unary_function

 

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plus minus negate multiplies divides modulus logical_and logical_or logical_not	equal_to not_equal_to greater less greater_equal less_equal bit_and bit_or bit_xor
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unary_function (veraltet)
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mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (veraltet) (veraltet) (veraltet) (veraltet)
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mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (veraltet) (veraltet) (veraltet) (veraltet)
binder1st binder2nd (veraltet) (veraltet)
bind1st bind2nd (veraltet) (veraltet)

 

definiert in Header <functional>
template<typename ArgumentType, typename ResultType> struct unary_function;		(veraltet)

unary_function ist eine Basisklasse für die Erstellung von Funktions-Objekte mit einem Argument .

Original:

unary_function is a base class for creating function objects with one argument.

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unary_function definiert nicht operator(), es wird erwartet, dass diese abgeleiteten Klassen definieren. unary_function bietet nur zwei Arten - argument_type und result_type - definiert durch die Template-Parameter .

Original:

unary_function does not define operator(); it is expected that derived classes will define this. unary_function provides only two types - argument_type and result_type - defined by the template parameters.

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Einige Standardbibliothek Funktionsobjekt Adapter, wie std::not1 erfordern die Funktionsobjekte sie an bestimmte Typen definiert werden; std::not1 erfordert das Funktionsobjekt ausgebildet ist, um einen Typ benannt argument_type haben. Ableitung Funktion Objekte, die ein Argument nehmen vom unary_function ist eine einfache Möglichkeit, um sie kompatibel mit den Adaptern .

Original:

Some standard library function object adaptors, such as std::not1, require the function objects they adapt to have certain types defined; std::not1 requires the function object being adapted to have a type named argument_type. Deriving function objects that take one argument from unary_function is an easy way to make them compatible with those adaptors.

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unary_function ist in C + 11 veraltet. Seine Funktionalität wurde überholt von std::function .

Original:

unary_function is deprecated in C++11. Its functionality has been made obsolete by std::function.

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Mitglied Typen

Type Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
argument_type	ArgumentType
result_type	ResultType

Beispiel

#include <algorithm>#include <functional>#include <iostream>#include <vector>   struct less_than_7 : std::unary_function<int, bool>{bool operator()(int i)const{return i <7;}};   int main(){std::vector<int> v;for(int i =0; i <10;++i) v.push_back(i);   std::cout<<std::count_if(v.begin(), v.end(), std::not1(less_than_7()));   /* C++11 solution: // Cast to std::function<bool (int)> somehow - even with a lambda std::cout << std::count_if(v.begin(), v.end(), std::not1(std::function<bool (int)>([](int i){ return i < 7; })) ); */}

Output:

3

Siehe auch

function (C++11)	wickelt aufrufbare Objekt eines beliebigen Typs mit dem angegebenen Funktion Call-Signatur Original: wraps callable object of any type with specified function call signature The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template)
ptr_fun (veraltet)	schafft eine Adapter-kompatiblen Funktion Objekt-Wrapper von einem Zeiger auf eine Funktion Original: creates an adaptor-compatible function object wrapper from a pointer to function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template)
pointer_to_unary_function (veraltet)	Adapter-kompatiblen Wrapper für einen Zeiger auf einstellige Funktion Original: adaptor-compatible wrapper for a pointer to unary function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template)
binary_function (veraltet)	Adapter kompatibel Binärfunktion Basisklasse Original: adaptor-compatible binary function base class The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Klassen-Template)