std::function

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

ユーティリティライブラリ

型支援 (基本型、実行時型情報、型特性)

動的なメモリ管理

エラー処理

プログラムユーティリティ

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)

比較演算子

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

ペアとタプル

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

フォワード、スワップ、およびムーブ

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 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)
バインド 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)
リファレンス·ラッパー 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)
オペレーターのラッパー 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
否定子 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
バインダーおよびアダプタは非推奨になりました 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 (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 mem_fun1_t const_mem_fun_t const_mem_fun1_t (廃止予定) (廃止予定) (廃止予定) (廃止予定)
mem_fun_ref (廃止予定)
mem_fun_ref_t mem_fun1_ref_t const_mem_fun_ref_t const_mem_fun1_ref_t (廃止予定) (廃止予定) (廃止予定) (廃止予定)
binder1st binder2nd (廃止予定) (廃止予定)
bind1st bind2nd (廃止予定) (廃止予定)

 

std::function

メンバ関数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

function::function

function::~function

function::operator=

function::swap

function::assign

function::operator bool

function::operator()

function::target_type

function::target

非メンバ関数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator== operator!=

std::swap(std::function)

ヘルパークラス Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

std::uses_allocator<std::function>

 

Defined in header <functional>
template< class > class function; /* undefined */		(C++11およびそれ以降)
template< class R, class... Args > class function<R(Args...)>		(C++11およびそれ以降)

テンプレートクラスstd::functionは汎用で多態な関数ラッパーです。 std::functionのインスタンスは任意の呼び出し可能な「ターゲット」（関数、ラムダ式、バインド式、その他の関数オブジェクト）を格納したり、コピーしたり、呼び出したりできます。

メンバータイプ

タイプ 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
result_type	R
argument_type	T場合sizeof...(Args)==1とTArgs...で最初で唯一のタイプです Original: T if sizeof...(Args)==1 and T is the first and only type in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first_argument_type	T1場合sizeof...(Args)==2とT1Args...の2つのタイプの最初のものです Original: T1 if sizeof...(Args)==2 and T1 is the first of the two types in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
second_argument_type	T2場合sizeof...(Args)==2とT2Args...の2つのタイプの2番目で​​す Original: T2 if sizeof...(Args)==2 and T2 is the second of the two types in Args... The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

メンバ関数

(constructor)	新しいstd::functionインスタンスを構築します Original: constructs a new std::function instance The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
(destructor)	std::functionインスタンスを破棄します Original: destroys a std::function instance The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
operator=	内容が割り当てられます Original: assigns the contents The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
swap	スワップ内容 Original: swaps the contents The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
assign	新しいターゲットを割り当てます Original: assigns a new target The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
operator bool	有効なターゲットであればチェックが含まれています Original: checks if a valid target is contained The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
operator()	ターゲットを呼び出します Original: invokes the target The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
ターゲットアクセス Original: Target access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
target_type	typeidの格納されたターゲットのstd::functionを取得します Original: obtains the typeid of the stored target of a std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
target	std::functionの格納されたターゲットへのポインタを取得します Original: obtains a pointer to the stored target of a std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)

非メンバ関数

std::swap(std::function) (C++11)	std::swapアルゴリズムを専門としています Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート)
operator== operator!=	std::functionとstd::nullptrを比較します Original: compares an std::function with std::nullptr The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート)

ヘルパークラス

std::uses_allocator<std::function> (C++11)	std::uses_allocator型形質を専門としています Original: specializes the std::uses_allocator type trait The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラステンプレートの特殊化の2つの値を比較します)

例

このコードを実行します

#include <functional>
#include <iostream>
 
struct Foo {
    Foo(int num) : num_(num) {}
    void print_add(int i) const { std::cout << num_+i << '\n'; }
    int num_;
};
 
void print_num(int i)
{
    std::cout << i << '\n';
}
 
int main()
{
    // store a free function
    std::function<void(int)> f_display = print_num;
    f_display(-9);
 
    // store a lambda
    std::function<void()> f_display_42 = []() { print_num(42); };
    f_display_42();
 
    // store the result of a call to std::bind
    std::function<void()> f_display_31337 = std::bind(print_num, 31337);
    f_display_31337();
 
    // store a call to a member function
    std::function<void(const Foo&, int)> f_add_display = &Foo::print_add;
    Foo foo(314159);
    f_add_display(foo, 1);
}

出力:

-9
42
31337
314160

参照

bad_function_call (C++11)	空のstd::functionを呼び出すときに例外がスローされます Original: the exception thrown when invoking an empty std::function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (クラス)
mem_fn (C++11)	メンバへのポインタの関数オブジェクトを作成します Original: creates a function object out of a pointer to a member The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート)