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std::binary_negate

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< cpp‎ | utility‎ | functional

 
 
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initializer_list(C++11)
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関係演算子
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Relational operators
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リファレンス·ラッパー
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(C++11)
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Operator wrappers
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否定子
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Negators
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unary_negate
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バインダーおよびアダプタは非推奨になりました
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Deprecated binders and adaptors
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unary_function(廃止予定)
binary_function(廃止予定)
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Defined in header <functional>
template< class Predicate >

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

    >;
(C++11以前)
template< class Predicate >
struct binary_negate;
(C++11およびそれ以降)
binary_negateラッパー関数オブジェクトは、それが保持​​するバイナリ述語の補数を返しています.
Original:
binary_negate is a wrapper function object returning the complement of the binary predicate it holds.
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バイナリ述語のタイプは、述語のパラメータ型に変換できる2メンバータイプ、first_argument_typesecond_argument_typeを定義する必要があります。 std::owner_lessから得られた関数オブジェクト、std::refstd::crefstd::plusstd::minusstd::multipliesstd::dividesstd::modulusstd::equal_tostd::not_equal_tostd::greaterstd::lessstd::greater_equalstd::less_equalstd::logical_notstd::logical_orstd::bit_andstd::bit_orstd::bit_xorstd::mem_fnstd::map::value_compstd::multimap::value_compstd::function 、またはstd::not2これらの型が定義されているの呼び出しから、廃止されたstd::binary_functionから派生した関数オブジェクトがあるので.
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オブジェクトを容易にstd::not2ヘルパー関数を使用して構築されて.
Original:
binary_negate objects are easily constructed with helper function std::not2.
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目次

[編集] メンバータイプ

タイプ
Original:
Type
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Definition
first_argument_type Predicate::first_argument_type
second_argument_type Predicate::second_argument_type
result_type bool

[編集] メンバ関数

(constructor)
constructs a new binary_negate object with the supplied predicate
(パブリックメンバ関数)
operator()
格納された述語の呼び出しの結果の論理補数を返します
Original:
returns the logical complement of the result of a call to the stored predicate
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(パブリックメンバ関数)

の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 -
述語関数オブジェクト
Original:
predicate function object
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の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 -
述部を通過させるために、最初の引数
Original:
first argument to pass through to predicate
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y -
第二引数に述語を通過する
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).

[編集]

#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

[編集] も参照してください

(廃止予定)
アダプタと互換性のあるバイナリ関数基底クラス
Original:
adaptor-compatible binary function base class
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(クラステンプレート) [edit]
(C++11)
指定された関数呼び出しシグネチャを持つ任意の型の呼び出し可能オブジェクトをラップします
Original:
wraps callable object of any type with specified function call signature
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(クラステンプレート) [edit]
カスタムstd::binary_negateオブジェクトを作成します
Original:
constructs custom std::binary_negate object
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(関数テンプレート) [edit]
(廃止予定)
関数へのポインタからアダプタと互換性のある関数オブジェクトのラッパーを作成します
Original:
creates an adaptor-compatible function object wrapper from a pointer to function
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(関数テンプレート) [edit]
ラッパー関数オブジェクトは、それが保持​​単項述語の補集合を返す
Original:
wrapper function object returning the complement of the unary predicate it holds
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(クラステンプレート) [edit]