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std::not2

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< cpp‎ | utility‎ | functional

 
 
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可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
関係演算子
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
ペアとタプル
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
フォワード、スワップ、および移動
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
関数オブジェクト
関数ラッパー
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Function wrappers
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function(C++11)
mem_fn(C++11)
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Bind
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bind(C++11)
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リファレンス·ラッパー
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Reference wrappers
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reference_wrapper(C++11)
ref
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(C++11)
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オペレーターのラッパー
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Operator wrappers
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否定子
Original:
Negators
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not1
not2
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)
ptr_fun(廃止予定)
pointer_to_unary_function(廃止予定)
pointer_to_binary_function(廃止予定)
mem_fun(廃止予定)
mem_fun_t
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mem_fun_ref(廃止予定)
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binder1st
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bind1st
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(廃止予定)
 
Defined in header <functional>
template< class Predicate >
std::binary_negate<Predicate> not2(const Predicate& pred);
not2渡されたバイナリ述語関数の補数を返す関数オブジェクトを作成するためのヘルパー関数です。作成した関数オブジェクトは型std::binary_negate<Predicate>のです.
Original:
not2 is a helper function to create a function object that returns the complement of the binary predicate function passed. The function object created is of type std::binary_negate<Predicate>.
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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 、または廃止されたstd::not2std::binary_functionから派生関数オブジェクトであるとして、これらのタイプは、定義されているために別の呼び出しから.
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 another call to std::not2 have these types defined, as are function objects derived from the deprecated std::binary_function.
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目次

[編集] パラメータ

pred -
単項述語
Original:
unary predicate
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[編集] 値を返します

std::not2std::binary_negate<Predicate>で構築、型predのオブジェクトを返します。.
Original:
std::not2 returns an object of type std::binary_negate<Predicate>, constructed with pred.
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[編集] 例外

なし.
Original:
None.
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[編集]

#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
 
struct old_same : std::binary_function<int, int, bool>
{
    bool operator()(int a, int b) const { return a == b; }
};
 
struct new_same
{
    bool operator()(int a, int b) const { return a == b; }
};
 
bool same_fn(int a, int b)
{
    return a == b;
}
 
 
int main()
{
    std::vector<int> v1{0, 1, 2};
    std::vector<int> v2{2, 1, 0};
    std::vector<bool> v3(v1.size());
 
    std::cout << "negating a binary_function:\n";
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(),
                   std::not2(old_same()));
 
    std::cout << std::boolalpha;
    for (std::size_t i = 0; i < v1.size(); ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
 
    std::cout << "negating a standard functor:\n";
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(),
                   std::not2(std::equal_to<int>()));
 
    for (std::size_t i = 0; i < v1.size(); ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
 
    std::cout << "negating a std::function:\n";
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(),
                   std::not2(std::function<bool(int,int)>(new_same())));
 
    for (std::size_t i = 0; i < v1.size(); ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
 
    std::cout << "negating a std::reference_wrapper:\n";
    std::transform(v1.begin(), v1.end(), v2.begin(), v3.begin(),
                   std::not2(std::ref(same_fn)));
 
    for (std::size_t i = 0; i < v1.size(); ++i)
        std::cout << v1[i] << ' ' << v2[i] << ' ' << v3[i] << '\n';
 
}

Output:

negating a binary_function:
0 2 true
1 1 false
2 0 true
negating a standard functor:
0 2 true
1 1 false
2 0 true
negating a std::function:
0 2 true
1 1 false
2 0 true
negating a std::reference_wrapper:
0 2 true
1 1 false
2 0 true

[編集] も参照してください

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す
Original:
wrapper function object returning the complement of the binary predicate it holds
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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::unary_negateオブジェクトを作成します
Original:
constructs custom std::unary_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]
(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]