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std::binary_function

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C++
 
Biblioteca de utilitários
Digite apoio (basic types, RTTI, type traits)
Gerenciamento de memória dinâmica
De tratamento de erros
Utilidades do programa
Variadic funções
Data e hora
Objetos de função
(C++11)
(C++11)
Os operadores relacionais
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Pares e tuplas
Original:
Pairs and tuples
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(C++11)
(C++11)
(C++11)
Troque, avançar e avançar
Original:
Swap, forward and move
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(C++11)
(C++11)
(C++11)
(C++11)
 
Objetos de função


Invólucros de função
Original:
Function wrappers
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(C++11)
(C++11)
(C++11)
Ligar
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Bind
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(C++11)
(C++11)
(C++11)
(C++11)
Invólucros de referência
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Reference wrappers
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(C++11)
(C++11)(C++11)
Invólucros operador
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Operator wrappers
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Negadores
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Negators
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Obsoleta ligantes e adaptadores
Original:
Deprecated binders and adaptors
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(obsoleta)
binary_function
(obsoleta)
(obsoleta)
(obsoleta)
(obsoleta)
(obsoleta)
(obsoleta)(obsoleta)(obsoleta)(obsoleta)
(obsoleta)
(obsoleta)(obsoleta)(obsoleta)(obsoleta)
(obsoleta)(obsoleta)
(obsoleta)(obsoleta)
 
Definido no cabeçalho <functional>
template<

    class Arg1,
    class Arg2,
    class Result

> struct binary_function;
 (obsoleta)
binary_function é uma classe base para a criação de objetos de função com dois argumentos.
Original:
binary_function is a base class for creating function objects with two arguments.
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binary_function não define operator(); espera-se que as classes derivadas vai definir este. binary_function prevê apenas três tipos - first_argument_type, second_argument_type e result_type - definida pelos parâmetros do modelo.
Original:
binary_function does not define operator(); it is expected that derived classes will define this. binary_function provides only three types - first_argument_type, second_argument_type and result_type - defined by the template parameters.
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Alguns biblioteca padrão adaptadores função de objeto, como std::not2, exigem que os objetos de função que se adaptam a ter certos tipos definidos; std::not2 requer o objeto de função que está sendo adaptado para ter dois tipos nomeados first_argument_type e second_argument_type. Derivando objetos de função que tomam dois argumentos de binary_function é uma maneira fácil de fazê-los compatíveis com os adaptadores.
Original:
Some standard library function object adaptors, such as std::not2, require the function objects they adapt to have certain types defined; std::not2 requires the function object being adapted to have two types named first_argument_type and second_argument_type. Deriving function objects that take two arguments from binary_function is an easy way to make them compatible with those adaptors.
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binary_function é preterido em C + 11. Sua funcionalidade foi tornada obsoleta pela std::function e outros objetos de função padrão da biblioteca, que definem os tipos necessários.
Original:
binary_function is deprecated in C++11. Its functionality has been made obsolete by std::function and other standard library function objects, which define the necessary types.
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[editar] Tipos de membro

Tipo
Original:
Type
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 Definition
first_argument_type Arg1
second_argument_type Arg2
result_type Result

[editar] Exemplo

#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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    std::vector<int> v2{10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
    std::vector<bool> v3(v1.size());
 
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(), std::not2(same()));
 
    std::cout << std::boolalpha;
    for (std::size_t i = 0; i < v1.size(); ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
}

Saída: 

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

[editar] Veja também

(C++11)
envolve objeto que pode ser chamado de qualquer tipo com a assinatura especificada função chamada
Original:
wraps callable object of any type with specified function call signature
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(modelo de classe) [edit]
(obsoleta)
cria um adaptador compatível com invólucro objeto de função de um ponteiro para função
Original:
creates an adaptor-compatible function object wrapper from a pointer to function
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(modelo de função) [edit]
(obsoleta)
adaptador compatível com invólucro para um ponteiro para função de binário
Original:
adaptor-compatible wrapper for a pointer to binary function
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(modelo de classe) [edit]
(obsoleta)
adaptador compatível classe base unário função
Original:
adaptor-compatible unary function base class
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(modelo de classe) [edit]
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