I prefer the C++ solution as well because detailed control of everything is what I use C++ for, but saying there is no extra complexity "you just need the ..." is funny because you could say the same about everything that's causing extra complexity.
Also, the requirement to add an empty parameter list whenever there's something between [] and {} amounts to extra complexity. This seems to be a purely syntactical dismbiguation thing as neither the mutable qualifier nor the return type should be related to an empty parameter list.
We have to realise what complexity is. Part of it is having to think of B whenver we do A even though we do not wish to say anything about B at all.
Also, the requirement to add an empty parameter list whenever there's something between [] and {} amounts to extra complexity. This seems to be a purely syntactical dismbiguation thing as neither the mutable qualifier nor the return type should be related to an empty parameter list.
We have to realise what complexity is. Part of it is having to think of B whenver we do A even though we do not wish to say anything about B at all.