std::not1

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Utilità libreria

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

Gestione della memoria dinamica

La gestione degli errori

Programma di utilità

Funzioni variadic

Data e ora

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<class Predicate > std::unary_negate<Predicate> not1(const Predicate& pred);

not1 è una funzione di supporto per creare un oggetto funzione che restituisce il complemento della funzione predicativa unaria passato. L'oggetto creato è funzione del tipo std::unary_negate<Predicate>.

Original:

not1 is a helper function to create a function object that returns the complement of the unary predicate function passed. The function object created is of type std::unary_negate<Predicate>.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Il tipo di predicato unario deve definire un tipo di membro, argument_type, che è convertibile al tipo di parametro il predicato di. Gli oggetti funzione unari ottenuti da std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, o da un'altra chiamata a std::not1 hanno definito questo tipo, in quanto sono oggetti funzionali derivati ​​dalla std::unary_function deprecato.

Original:

The unary predicate type must define a member type, argument_type, that is convertible to the predicate's parameter type. The unary function objects obtained from std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, or from another call to std::not1 have this type defined, as are function objects derived from the deprecated std::unary_function.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parametri

pred

-

predicato unario Original: unary predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

std::not1 restituisce un oggetto di tipo std::unary_negate<Predicate>, costruito con pred.

Original:

std::not1 returns an object of type std::unary_negate<Predicate>, constructed with pred.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Eccezioni

Nessuno.

Original:

None.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Esempio

#include <algorithm>#include <functional>#include <iostream>#include <vector>   struct LessThan7 :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(LessThan7()))<<"\n";   //same as above, but use a lambda functionstd::function<int(int)> less_than_9 =[](int x){return x <9;};std::cout<<std::count_if(v.begin(), v.end(), std::not1(less_than_9))<<"\n";}

Output:

3

Vedi anche

unary_negate	funzione oggetto wrapper restituisce il complemento del predicato unario che detiene Original: wrapper function object returning the complement of the unary predicate it holds The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe template)
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)
not2	costruisce oggetto personalizzato std::binary_negate Original: constructs custom std::binary_negate object 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)
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)
unary_function (deprecato)	adattatore compatibile unario classe base funzione Original: adaptor-compatible unary 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)