std::unary_function

 

C++

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Espressioni regolari(C++11)

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Utilità libreria

Tipo di supporto (basic types, RTTI, type traits)

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Funzione oggetti

initializer_list (C++11)

bitset

hash (C++11)

Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, in avanti e spostare Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Funzione oggetti

Funzione wrapper Original: Function wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
function (C++11)
mem_fn (C++11)
bad_function_call (C++11)
Associare Original: Bind The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
bind (C++11)
is_bind_expression (C++11)
is_placeholder (C++11)
_1, _2, _3, ... (C++11)
Wrapper di riferimento Original: Reference wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
reference_wrapper (C++11)
ref cref (C++11) (C++11)
Operatore wrapper Original: Operator wrappers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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
Negatori Original: Negators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unary_negate binary_negate	not1 not2
Sconsigliata a leganti e adattatori Original: Deprecated binders and adaptors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unary_function (deprecato)
binary_function (deprecato)
ptr_fun (deprecato)
pointer_to_unary_function (deprecato)
pointer_to_binary_function (deprecato)
mem_fun (deprecato)
mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t (deprecato) (deprecato) (deprecato) (deprecato)
mem_fun_ref (deprecato)
mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (deprecato) (deprecato) (deprecato) (deprecato)
binder1st binder2nd (deprecato) (deprecato)
bind1st bind2nd (deprecato) (deprecato)

 

Elemento definito nell'header <functional>
template<typename ArgumentType, typename ResultType> struct unary_function;		(deprecato)

unary_function è una classe di base per la creazione di oggetti funzione con un argomento.

Original:

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

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unary_function non operator() definire, si prevede che le classi derivate definirà questo. unary_function prevede solo due tipi - argument_type e result_type - definito dai parametri di modello.

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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Alcuni biblioteca standard adattatori oggetto funzione, come ad esempio std::not1, richiedono gli oggetti funzione si adattano ad avere certi tipi definiti; std::not1 richiede l'oggetto funzione essendo atto di avere un tipo denominato argument_type. Derivazione di oggetti funzione che richiede un argomento da unary_function è un modo semplice per renderli compatibili con tali schede.

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 è deprecato in C + +11. La sua funzionalità è stata resa obsoleta da std::function.

Original:

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

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Membri tipi

Tipo 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

Esempio

#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

Vedi anche

function (C++11)	avvolge oggetto invocabile di qualsiasi tipo con la firma specificato chiamata di funzione 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. (classe template)
ptr_fun (deprecato)	crea un adattatore compatibile con wrapper di oggetto funzione da un puntatore a funzione 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. (funzione di modello)
pointer_to_unary_function (deprecato)	adattatore compatibile wrapper per un puntatore a funzione unaria 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. (classe template)
binary_function (deprecato)	adattatore compatibile con la funzione di classe di base binaria 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. (classe template)