C++

参考

<functional>

函数

public member function
<functional>

std::function::~function

~function();
Destroy function wrapper
Destroys the function object.

This destroys its target, and deallocates any storage allocated by the object.

数据竞争

Both the object and its target are modified.

异常安全

无异常保证： 绝不抛出异常。