std::binary_negate

 

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关系运算符 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>=

双和元组 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）

掉期，远期和移动 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）

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函数对象

功能包装 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）
绑定 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）
参考包装 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）
操作包装 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
否定词 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
已过时粘合剂和适配器 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 （过时了）
binary_function （过时了）
ptr_fun （过时了）
pointer_to_unary_function （过时了）
pointer_to_binary_function （过时了）
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mem_fun_t mem_fun1_t const_mem_fun_t const_mem_fun1_t （过时了） （过时了） （过时了） （过时了）
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mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t （过时了） （过时了） （过时了） （过时了）
binder1st binder2nd （过时了） （过时了）
bind1st bind2nd （过时了） （过时了）

 

Defined in header <functional>
template< class Predicate > struct binary_negate :     public std::binary_function<         Predicate::first_argument_type,         Predicate::second_argument_type,         bool     >;		（至 C++11）
template< class Predicate > struct binary_negate;		（C++11 起）

binary_negate是一个包装函数对象返回其持有的二元谓词的补.

Original:

binary_negate is a wrapper function object returning the complement of the binary predicate it holds.

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二元谓词类型必须定义两个的成员类型first_argument_type和second_argument_type，可转换谓词的参数类型。从std::owner_less的函数对象，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 ，或调用std::not2这些定义的类型，函数对象来自过时的std::binary_function.

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对象很容易构造辅助函数std::not2.

Original:

binary_negate objects are easily constructed with helper function std::not2.

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会员类型

类型 Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
first_argument_type	Predicate::first_argument_type
second_argument_type	Predicate::second_argument_type
result_type	bool

成员函数

(constructor)	constructs a new binary_negate object with the supplied predicate （公共成员函数）
operator()	返回的逻辑补码的呼叫的结果，所存储的谓词 Original: returns the logical complement of the result of a call to the stored predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）

的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

-

谓词函数对象 Original: predicate function object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

的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	-	第一个参数传递到谓词 Original: first argument to pass through to predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
y	-	第二个参数传递到谓词 Original: second argument to pass through to predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Return value

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

为例

#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

另请参阅

binary_function （过时了）	适配器兼容的二元函数的基类 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. （类模板）
function （C++11）	包装任何类型的可调用对象与指定的函数调用签名 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. （类模板）
not2	构造自定义std::binary_negate对象 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. （函数模板）
ptr_fun （过时了）	创建适配器兼容功能的包装对象从一个指针到函数 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. （函数模板）
unary_negate	包装函数对象返回的补一元谓词其持有的 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. （类模板）