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std::binary_function

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< cpp‎ | utility‎ | functional

 
 
 
Function-Objekte
Funktionswrapper
function(C++11)
mem_fn(C++11)
bad_function_call(C++11)
Bindung
bind(C++11)
is_bind_expression(C++11)
is_placeholder(C++11)
_1, _2, _3, ...(C++11)
Referenzwrapper
reference_wrapper(C++11)
ref
cref
(C++11)
(C++11)
Operatorwrapper
Verneinung
Veraltete Binder und Adapter
unary_function(veraltet)
binary_function(veraltet)
ptr_fun(veraltet)
pointer_to_unary_function(veraltet)
pointer_to_binary_function(veraltet)
mem_fun(veraltet)
mem_fun_t
mem_fun1_t
const_mem_fun_t
const_mem_fun1_t
(veraltet)
(veraltet)
(veraltet)
(veraltet)
mem_fun_ref(veraltet)
mem_fun_ref_t
mem_fun1_ref_t
const_mem_fun_ref_t
const_mem_fun1_ref_t
(veraltet)
(veraltet)
(veraltet)
(veraltet)
binder1st
binder2nd
(veraltet)
(veraltet)
bind1st
bind2nd
(veraltet)
(veraltet)
 
Defined in header <functional>
template<

    class Arg1,
    class Arg2,
    class Result

> struct binary_function;
(veraltet)
binary_function ist eine Basisklasse für die Erstellung von Funktions-Objekte mit zwei Argumenten .
Original:
binary_function is a base class for creating function objects with two arguments.
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binary_function definiert nicht operator(), es wird erwartet, dass diese abgeleiteten Klassen definieren. binary_function bietet nur drei Arten - first_argument_type, second_argument_type und result_type - definiert durch die Template-Parameter .
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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Einige Standard-Library-Funktion Objekt Adapter, wie std::not2, benötigen Sie die Funktion Objekte, die sie an bestimmte Typen definiert; std::not2 erfordert das Funktions-Objekt geeignet ist, zwei Arten benannt haben first_argument_type und second_argument_type. Ableitung Funktion Objekte, die zwei Argumente aus binary_function ist eine einfache Möglichkeit, um sie kompatibel mit den Adaptern .
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 ist in C + 11 veraltet. Seine Funktionalität wurde überholt von std::function und andere Standard-Library-Funktion Objekte definieren, welche die erforderlichen Typen .
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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[Bearbeiten] Mitglied Typen

Type
Original:
Type
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Definition
first_argument_type Arg1
second_argument_type Arg2
result_type Result

[Bearbeiten] Beispiel

#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';
}

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

[Bearbeiten] Siehe auch

(C++11)
wickelt aufrufbare Objekt eines beliebigen Typs mit dem angegebenen Funktion Call-Signatur
Original:
wraps callable object of any type with specified function call signature
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(Klassen-Template) [edit]
(veraltet)
schafft eine Adapter-kompatiblen Funktion Objekt-Wrapper von einem Zeiger auf eine Funktion
Original:
creates an adaptor-compatible function object wrapper from a pointer to function
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(Funktions-Template) [edit]
Adapter-kompatiblen Wrapper für einen Zeiger auf binäre Funktion
Original:
adaptor-compatible wrapper for a pointer to binary function
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(Klassen-Template) [edit]
(veraltet)
Adapter kompatibel einstellige Funktion Basisklasse
Original:
adaptor-compatible unary function base class
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(Klassen-Template) [edit]