5种智能指针指向数组的方法| 5 methods for c shared_ptr point to an array

原创

于 2019-12-19 12:49:57 发布 · 1k 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了在C++中使用shared_ptr管理动态分配数组的5种正确方法，包括如何设置自定义 deleter，以及内置的数组支持。详细代码示例和解释确保了资源的正确释放。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

本文首发于个人博客https://kezunlin.me/post/b82753fc/，欢迎阅读最新内容！

5 methods for c shared_ptr point to an array

Guide

shared_ptr

Prior to C 17, shared_ptr could not be used to manage dynamically allocated arrays. By default, shared_ptr will call delete on the managed object when no more references remain to it. However, when you allocate using new[] you need to call delete[], and not delete, to free the resource.

In order to correctly use shared_ptr with an array, you must supply a custom deleter.

code example

//OK, pointer to int 999
std::shared_ptr<int> sp(new int(999)); 


template< typename T >
struct array_deleter
{
  v

最低0.47元/天解锁文章