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std::is_member_pointer

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C++
 
ユーティリティライブラリ
支援を入力します (basic types, RTTI, type traits)
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)
関係演算子
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Relational operators
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rel_ops::operator!=
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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)
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支援を入力します
基本的なタイプ
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Basic types
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基本的なタイプ
固定幅の整数型 (C++11)
数値の限界
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Numeric limits
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numeric_limits
Cの数値は、インターフェイスを制限します
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Runtime type information
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Type traits
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Primary type categories
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is_arithmetic(C++11)
is_reference(C++11)
is_lvalue_reference(C++11)
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is_member_pointer(C++11)
is_member_object_pointer(C++11)
is_member_function_pointer(C++11)
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Type properties
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is_const(C++11)
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Supported operations
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is_constructible
is_trivially_constructible
is_nothrow_constructible		(C++11)
(C++11)
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is_default_constructible
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is_nothrow_default_constructible		(C++11)
(C++11)
(C++11)
is_copy_constructible
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is_nothrow_copy_constructible		(C++11)
(C++11)
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is_move_constructible
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is_nothrow_move_constructible		(C++11)
(C++11)
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is_assignable
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is_nothrow_assignable		(C++11)
(C++11)
(C++11)
is_copy_assignable
is_trivially_copy_assignable
is_nothrow_copy_assignable		(C++11)
(C++11)
(C++11)
is_move_assignable
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is_nothrow_move_assignable		(C++11)
(C++11)
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is_destructible
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(C++11)
(C++11)
has_virtual_destructor(C++11)
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remove_cv
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(C++11)
add_cv
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add_volatile		(C++11)
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enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
result_of(C++11)
形質定数を入力します
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Type trait constants
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integral_constant(C++11)
 
Defined in header <type_traits>
template< class T >
struct is_member_pointer;
 (C + + 11以来)
Tは、非静的メンバオブジェクトまたは非静的メンバ関数へのポインタへのポインタである場合、メンバー定数value等しいtrueを提供しています。その他のタイプのために、valuefalseです.
Original:
If T is pointer to non-static member object or a pointer to non-static member function, provides the member constant value equal true. For any other type, value is false.
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目次

Inherited from std::integral_constant

Member constants

value
[静的]
true T is a member pointer type もし、そうでなければfalse
Original:
true if T is a member pointer type , false otherwise
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(公共の静的メンバ定数)

Member functions

operator bool
boolにオブジェクトは、value返しに変換します
Original:
converts the object to bool, returns value
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(パブリックメンバ関数)

Member types

タイプ
Original:
Type
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 Definition
value_type bool
type std::integral_constant<bool, value>

[編集] 可能な実装

template< class T >
struct is_member_pointer_helper         : std::false_type {};
 
template< class T, class U >
struct is_member_pointer_helper<T U::*> : std::true_type {};
 
template< class T >
struct is_member_pointer : 
    is_member_pointer_helper<typename std::remove_cv<T>::type> {};

[編集] 例

This section is incomplete
Reason: simplify 
#include <iostream>
#include <type_traits>
 
int main() {
    class cls {};
    std::cout << (std::is_member_pointer<int(cls::*)>::value
                     ? "T is member pointer"
                     : "T is not a member pointer") << '\n';
    std::cout << (std::is_member_pointer<int>::value
                     ? "T is member pointer"
                     : "T is not a member pointer") << '\n';
}

Output: 

T is member pointer
T is not a member pointer

[編集] も参照してください

(C++11)
タイプかどうかをチェックするには、ポインタ型です
Original:
checks if a type is a pointer type
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(クラステンプレート) [edit]
(C++11)
タイプかどうかをチェックするには、非静的メンバオブジェクトへのポインタです
Original:
checks if a type is a pointer to a non-static member object
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(クラステンプレート) [edit]
(C++11)
タイプかどうかをチェックするには、非静的メンバ関数へのポインタです
Original:
checks if a type is a pointer to a non-static member function
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(クラステンプレート) [edit]
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