Macros to disallow class copy and assignment. Google -vs- Qt

Question

To disallow copying or assigning a class it\'s common practice to make the copy constructor and assignment operator private. Both Google and Qt have macros to make this eas

Answer 1

There's no practical difference. The assignment operator signatures differ just as a matter of style. It's usual to have an assignment operator returning a reference to allow chaining:

a = b = c;

but a version returning void is also legal and will work just fine for cases when the only purpose is to just declare the operator private and therefore prohibited to use.