智能指针和数组 [英] smart pointers and arrays

问题描述

智能指针如何处理数组？例如，

How do smart pointers handle arrays? For example,

void function(void)
{
    std::unique_ptr<int> my_array(new int[5]);
}

当 my_array 超出范围并被破坏，整个数组是否会被重新声明？只是数组的第一个元素被回收？

When my_array goes out of scope and gets destructed, does the entire integer array get re-claimed? Is only the first element of the array reclaimed? Or is there something else going on (such as undefined behavior)?

推荐答案

它会调用 delete [ ] ，因此整个数组将被回收，但我相信你需要指出你正在使用 unique_ptr 的数组形式：

It will call delete[] and hence the entire array will be reclaimed but i believe you need to indicate that you are using a array form of unique_ptrby:

std::unique_ptr<int[]> my_array(new int[5]);

这称为的部分专业化 unique_ptr 。

This is called as Partial Specialization of the unique_ptr.

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