首页How to use std::share_ptr.reset() in C++

How to use std::share_ptr.reset() in C++

时间: 2024-01-21 16:05:08 浏览: 100

In C++, `std::shared_ptr.reset()` is used to reset the `shared_ptr` object and change the ownership of the managed resource. It can be used in the following ways: 1. Reset with a new object: ```cpp std::shared_ptr<Type> ptr(new Type); // Create a shared_ptr ptr.reset(new Type); // Reset with a new object ``` 2. Reset to nullptr: ```cpp std::shared_ptr<Type> ptr(new Type); // Create a shared_ptr ptr.reset(); // Reset to nullptr ``` 3. Reset with a custom deleter: ```cpp std::shared_ptr<Type> ptr(new Type, customDeleter); // Create a shared_ptr with custom deleter ptr.reset(new Type, customDeleter); // Reset with a new object and custom deleter ``` Remember that after calling `reset()`, the previously managed resource will be released if there are no other shared_ptrs pointing to it. The `reset()` function also updates the reference count accordingly.

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