[motorest]

> It’s… not a part of the langage which mandates a default ctor in the first place.

Why should it, tough? Think about it. The goal of move semantics is performance, mainly avoiding to copy/initialize expensive objects using a standard syntax. Why do you believe it would be a good idea to force constructors when they can very well be the reason why move should be used?

[masklinn]

Did you reply to the wrong comment?