Type Erasure and the Functionality of std::shared_ptr
When working with the std::shared_ptr class, it's commonly observed that std::shared_ptr
Type Erasure and Destructor Invocation
std::shared_ptr utilizes type erasure by internally storing a deleter function that is invoked when the pointer is destroyed. This function is responsible for deallocating the memory pointed to by the shared pointer. Importantly, the deleter function is type-specific, meaning that it knows how to destruct objects of a specific type.
std::shared_ptr
Casting a std::shared_ptr
Consequence for Destructor Invocation
When a std::shared_ptr
Guaranteed Behavior by the Standard
While the current behavior of std::shared_ptr in this regard is not explicitly stated by the C standard, it is widely assumed to be a side effect of the type erasure implementation used by the most common compilers. However, future changes to the internal implementation of std::shared_ptr could potentially break code that relies on this behavior. Therefore, it is not recommended to rely on the functionality of std::shared_ptr
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