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Clarify safety of std::unique_ptr #296

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Clarify safety of std::unique_ptr #296

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2 changes: 1 addition & 1 deletion book/en-us/05-pointers.md
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Expand Up @@ -82,7 +82,7 @@ std::cout << "pointer3.use_count() = "

## 5.3 `std::unique_ptr`

`std::unique_ptr` is an exclusive smart pointer that prohibits other smart pointers from sharing the same object, thus keeping the code safe:
`std::unique_ptr` is an exclusive smart pointer that prohibits other smart pointers from sharing the same object by copy construction or copy assignment, thus avoiding errors due to repeated destruction or freeing:

```cpp
std::unique_ptr<int> pointer = std::make_unique<int>(10); // make_unique, from C++14
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2 changes: 1 addition & 1 deletion book/zh-cn/05-pointers.md
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Expand Up @@ -80,7 +80,7 @@ std::cout << "pointer3.use_count() = "

## 5.3 `std::unique_ptr`

`std::unique_ptr` 是一种独占的智能指针，它禁止其他智能指针与其共享同一个对象，从而保证代码的安全：
`std::unique_ptr` 是一种独占的智能指针，它禁止其他智能指针经由拷贝构造或拷贝赋值的方式与其共享同一个对象，从而避免重复析构或释放带来的错误：

```cpp
std::unique_ptr<int> pointer = std::make_unique<int>(10); // make_unique 从 C++14 引入
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