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MrShinshi avatar MrShinshi commented on August 15, 2024

事实上 std::unique_ptr 只能 "一定程度上的" 帮助用户防止内存泄漏, 而 不能保证代码安全, 甚至会在某些情况引入额外的灾难.

首先, C++ 本身无法禁止用户使用同一个指针构造多个智能指针(甚至可以是不同类型的智能指针),
其次, 即使使用 std::make_unique/ std::make_shared 委托构造, 也不能杜绝用户利用该智能指针实际指向的地址再次构造新的智能指针.

所以说粗略的把 "智能指针" 和 "安全" 混为一谈是一种不现实的痴心妄想, 用户不该认为, 或者误导他人可能有这样的 "安全" .

from modern-cpp-tutorial.

shimachao avatar shimachao commented on August 15, 2024

大佬 fork 一个单独的版本吧

from modern-cpp-tutorial.

changkun avatar changkun commented on August 15, 2024

Thanks and PR welcome

from modern-cpp-tutorial.

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