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std::bad_weak_ptr

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< cpp‎ | memory

 
 
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std::bad_weak_ptr
メンバ関数
Original:
Member functions
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bad_weak_ptr::bad_weak_ptr
 
Defined in header <memory>
class bad_weak_ptr;
(C++11およびそれ以降)
std::bad_weak_ptrstd::shared_ptrは既に削除されたオブジェクトを参照するときに、引数としてstd::weak_ptrを取るstd::weak_ptrのコンストラクタが例外としてスローされるオブジェクトのタイプです.
Original:
std::bad_weak_ptr is the type of the object thrown as exceptions by the constructors of std::shared_ptr that take std::weak_ptr as the argument, when the std::weak_ptr refers to an already deleted object.
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cpp/error/exceptionstd-bad weak ptr-inheritance.svg
画像の詳細

Inheritance diagram

目次

[編集] メンバ関数

bad_weak_ptrオブジェクトを作成します
Original:
constructs the bad_weak_ptr object
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(パブリックメンバ関数)

Inherited from std::exception

Member functions

例外オブジェクトを破棄します
Original:
destructs the exception object
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(仮想パブリックメンバ関数of std::exception) [edit]
[仮想]
説明文字列を返します
Original:
returns an explanatory string
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(仮想パブリックメンバ関数of std::exception) [edit]

[編集]

#include <memory>
#include <iostream>
int main()
{
    std::shared_ptr<int> p1(new int(42));
    std::weak_ptr<int> wp(p1);
    p1.reset();
    try {
        std::shared_ptr<int> p2(wp);
    } catch(const std::bad_weak_ptr& e) {
        std::cout << e.what() << '\n';
    }
}

Output:

std::bad_weak_ptr

[編集] も参照してください

smart pointer with shared object ownership semantics
(クラステンプレート) [edit]
(C++11)
std::shared_ptrによって管理されているオブジェクトへの弱い参照
Original:
weak reference to an object managed by std::shared_ptr
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(クラステンプレート) [edit]