WebbA shared_ptr can share ownership of an object while storing a pointer to another object. This feature can be used to point to member objects while owning the object they belong … WebbAnswer (1 of 3): A deep copy allocates new storage to contain a copy of any data structure in the original object. A shallow copy only copies the pointers, so the allocated data are …

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Webb4 sep. 2015 · DeepPtr& operator= ( const DeepPtr& other ) { DeepPtr temp { other }; swap ( *this, temp ); return *this; } But you get a better optimization if you use passing by value … WebbCopy the cloud to the heap and return a smart pointer Note that deep copy is performed, so avoid using this function on non-empty clouds. The changes of the returned cloud are … ealing education centre cpd

C++中的浅拷贝、深拷贝、智能指针 - joannae - 博客园

WebbA deep copy allocates new storage to contain a copy of any data structure in the original object. A shallow copy only copies the pointers, so the allocated data are shared. One problem with a shallow copy is you don’t know when it’s safe to delete the allocated data. You can use reference counts to patch this weakness. someptr; std::vectorsrc; std::vectordest; 如果我使用dest = src复制，这两个 … WebbIf it helps, you can also assume this shared_ptr is optimized for single threaded use, i.e., just a ref counter and no thread safety. But that is what happens when you compile your … in chemical reactions energy is