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std::binary_negate

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< cpp‎ | utility‎ | functional

 
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
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Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
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Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
Funzione oggetti
Funzione wrapper
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Function wrappers
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function(C++11)
mem_fn(C++11)
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Associare
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Bind
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Wrapper di riferimento
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Operatore wrapper
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Operator wrappers
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Negatori
Original:
Negators
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unary_negate
binary_negate
Sconsigliata a leganti e adattatori
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Deprecated binders and adaptors
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unary_function(deprecato)
binary_function(deprecato)
ptr_fun(deprecato)
pointer_to_unary_function(deprecato)
pointer_to_binary_function(deprecato)
mem_fun(deprecato)
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mem_fun_ref_t
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(deprecato)
 
Defined in header <functional>
template< class Predicate >

struct binary_negate :
    public std::binary_function<
        Predicate::first_argument_type,
        Predicate::second_argument_type,
        bool

    >;
(C fino + 11)
template< class Predicate >
struct binary_negate;
(dal C++11)
binary_negate è un oggetto funzione wrapper restituisce il complemento del predicato binario che detiene.
Original:
binary_negate is a wrapper function object returning the complement of the binary predicate it holds.
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Il tipo di predicato binario necessario definire due tipi di membri, e first_argument_type second_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 una chiamata di 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 a call to std::not2 have these types defined, as are function objects derived from the deprecated std::binary_function.
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binary_negate oggetti sono facilmente costruiti con funzione di supporto std::not2.
Original:
binary_negate objects are easily constructed with helper function std::not2.
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Indice

[modifica] Membri tipi

Tipo
Original:
Type
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Definition
first_argument_type Predicate::first_argument_type
second_argument_type Predicate::second_argument_type
result_type bool

[modifica] Membri funzioni

(constructor)
constructs a new binary_negate object with the supplied predicate
(membro pubblico funzione)
operator()
restituisce il complemento logico del risultato di una chiamata al predicato memorizzato
Original:
returns the logical complement of the result of a call to the stored predicate
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(membro pubblico funzione)

std :: binary_negate ::
Original:
std::binary_negate::
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binary_negate

explicit binary_negate( Predicate const& pred );

Constructs a binary_negate function object with the stored predicate pred.

Parameters

pred -
predicato funzione dell'oggetto
Original:
predicate function object
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std :: binary_negate ::
Original:
std::binary_negate::
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operator()

bool operator()( first_argument_type const& x, second_argument_type const& y ) const;

Returns the logical complement of the result of calling pred(x, y).

Parameters

x -
primo argomento di passare attraverso predicato
Original:
first argument to pass through to predicate
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y -
Il secondo argomento di passare attraverso predicato
Original:
second argument to pass through to predicate
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Return value

The logical complement of the result of calling pred(x, y).

[modifica] Esempio

#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
 
struct same : std::binary_function<int, int, bool>
{
    bool operator()(int a, int b) const { return a == b; }
};
 
int main()
{
    std::vector<int> v1;
    std::vector<int> v2;
    for (int i = 0; i < 10; ++i) v1.push_back(i);
    for (int i = 0; i < 10; ++i) v2.push_back(10 - i);
 
    std::vector<bool> v3(v1.size());
 
    std::binary_negate<same> not_same((same()));
 
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), not_same);
 
    /* C++11 solution:
        // Use std::function<bool (int, int)>
        std::function<bool (int, int)> not_same =
            [](int x, int y)->bool{ return !same()(x, y); };
 
        std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), not_same);
    */
 
    std::cout.setf(std::ios_base::boolalpha);
    for (int i = 0; i < 10; ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
}

Output:

0 10 true
1 9 true
2 8 true
3 7 true
4 6 true
5 5 false
6 4 true
7 3 true
8 2 true
9 1 true

[modifica] Vedi anche

(deprecato)
adattatore compatibile con la funzione di classe di base binaria
Original:
adaptor-compatible binary function base class
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(classe template) [edit]
(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
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(classe template) [edit]
costruisce oggetto personalizzato std::binary_negate
Original:
constructs custom std::binary_negate object
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(funzione di modello) [edit]
(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
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(funzione di modello) [edit]
funzione oggetto wrapper restituisce il complemento del predicato unario che detiene
Original:
wrapper function object returning the complement of the unary predicate it holds
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(classe template) [edit]