std::not2

 

C++

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Espressioni regolari(C++11)

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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<class Predicate > std::binary_negate<Predicate> not2(const Predicate& pred);

not2 è una funzione di supporto per creare un oggetto funzione che restituisce il complemento della funzione di predicato binario passato. L'oggetto creato è funzione del tipo std::binary_negate<Predicate>.

Original:

not2 is a helper function to create a function object that returns the complement of the binary predicate function passed. The function object created is of type std::binary_negate<Predicate>.

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Il tipo di predicato binario necessario definire due tipi di membri, e first_argument_typesecond_argument_type, che sono convertibili per i tipi di parametro il predicato di. Gli oggetti ottenuti dalla funzione std::owner_less, std::ref, std::cref, std::plus, std::minus, std::multiplies, std::divides, std::modulus, std::equal_to, std::not_equal_to, std::greater, std::less, std::greater_equal, std::less_equal, std::logical_not, std::logical_or, std::bit_and, std::bit_or, std::bit_xor, std::mem_fn, std::map::value_comp, std::multimap::value_comp, std::function , o da un'altra chiamata avere std::not2 questi tipi definiti, come sono oggetti funzionali derivati ​​dalla std::binary_function deprecato.

Original:

The binary predicate type must define two member types, first_argument_type and second_argument_type, that are convertible to the predicate's parameter types. The function objects obtained from std::owner_less, std::ref, std::cref, std::plus, std::minus, std::multiplies, std::divides, std::modulus, std::equal_to, std::not_equal_to, std::greater, std::less, std::greater_equal, std::less_equal, std::logical_not, std::logical_or, std::bit_and, std::bit_or, std::bit_xor, std::mem_fn, std::map::value_comp, std::multimap::value_comp, std::function, or from another call to std::not2 have these types defined, as are function objects derived from the deprecated std::binary_function.

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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::not2 restituisce un oggetto di tipo std::binary_negate<Predicate>, costruito con pred.

Original:

std::not2 returns an object of type std::binary_negate<Predicate>, constructed with pred.

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Eccezioni

Nessuno.

Original:

None.

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Esempio

#include <algorithm>#include <functional>#include <iostream>#include <vector>   struct old_same :std::binary_function<int, int, bool>{bool operator()(int a, int b)const{return a == b;}};   struct new_same {bool operator()(int a, int b)const{return a == b;}};   bool same_fn(int a, int b){return a == b;}     int main(){std::vector<int> v1{0, 1, 2};std::vector<int> v2{2, 1, 0};std::vector<bool> v3(v1.size());   std::cout<<"negating a binary_function:\n";std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), std::not2(old_same()));   std::cout<<std::boolalpha;for(std::size_t i =0; i < v1.size();++i)std::cout<< v1[i]<<' '<< v2[i]<<' '<< v3[i]<<'\n';   std::cout<<"negating a standard functor:\n";std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), std::not2(std::equal_to<int>()));   for(std::size_t i =0; i < v1.size();++i)std::cout<< v1[i]<<' '<< v2[i]<<' '<< v3[i]<<'\n';   std::cout<<"negating a std::function:\n";std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), std::not2(std::function<bool(int,int)>(new_same())));   for(std::size_t i =0; i < v1.size();++i)std::cout<< v1[i]<<' '<< v2[i]<<' '<< v3[i]<<'\n';   std::cout<<"negating a std::reference_wrapper:\n";std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), std::not2(std::ref(same_fn)));   for(std::size_t i =0; i < v1.size();++i)std::cout<< v1[i]<<' '<< v2[i]<<' '<< v3[i]<<'\n';   }

Output:

negating a binary_function: 0 2 true 1 1 false 2 0 true negating a standard functor: 0 2 true 1 1 false 2 0 true negating a std::function: 0 2 true 1 1 false 2 0 true negating a std::reference_wrapper: 0 2 true 1 1 false 2 0 true

Vedi anche

binary_negate	funzione oggetto wrapper restituisce il complemento del predicato binario che detiene Original: wrapper function object returning the complement of the binary 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)
not1	costruisce oggetto personalizzato std::unary_negate Original: constructs custom std::unary_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)
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)