Head Const

[Guillaume Piolat via Digitalmars-d]

On Tuesday, 16 February 2016 at 01:04:44 UTC, Walter Bright wrote:
>>> 2. supports single assignment style of programming, even if 
>>> the data is
>>> otherwise mutable
>> Like 'final'?  We did get rid of that...
>
> Maybe we should resurrect it.

I'm trying to say it politely.
D2 const story is more complicated than its competitors.

Both D1 "final" and C++ const always felt more useful and 
practical to me that the whole D2 immutable/const/inout thing. 
The current scheme seems to have marginal value in practice, lots 
of complexity, and is harder to use well (Unqual, inout) etc. 
Constructors can break it. I don't know why we should be that 
happy about our constness, maybe someone can explain.