Make const, immutable, inout, and shared illegal as function attributes on the left-hand side of a function

[Martin Nowak via Digitalmars-d]

On 10/10/2014 07:52 PM, Steven Schveighoffer wrote:
>
> I think leaving this to a lint tool basically is as good and effective
> as doing nothing. It's not a compromise at all.

So the goal is more to help D beginners who would add a const to the 
return type
     const int foo();
thinking it will work like
     const int x;
rather than to improve readability.

It still makes a lot sense to update all our documentation and the style 
guide. Any volunteer for the latter?

Let's talk to Brian whether dfix would be able to do the rewrite 
automatically.
https://github.com/Hackerpilot/dfix/issues/1