There's no need: there's std::copy already.

Or maybe the idea was to create a typesafe template wrapper around the generic function which is also very common and really nice. No need to create one wrapper per type, a single template should work.

In addition to what mfrost said, there's also no need because C++ assignment is member-by-member copy unless otherwise specifically implemented for the type. If you have a POD, then that's what you get with assignment; there's no need to call memcpy at all.

(The difference is that memcpy will copy padding bytes, and the assignment operator may not. But if you depend on the values of the padding bytes, you have major problems...)