On Wednesday, 4 April 2018 at 22:47:07 UTC, Jonathan M Davis wrote:
Because doing that basically makes it impossible to guarantee that the type system isn't violated. Once an immutable variable has been initialized, its value must _never_ change. It must be initalized exactly once, and the compiler doesn't necessarily have any clue what the base class constructors did or didn't do. There's no guarantee that it even has access to the function bodies for the base class when compiling the derived class. So, there is no way for it to safely put off the initialization of any base class members for the derived class to do.

- Jonathan M Davis

Ah, makes sense. I was looking for a somewhat technical answer. Thanks for that : ).

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