const?? When and why? This is ugly!

[Lutger]

Walter Bright wrote:
...
> The way to do strings in D is to have them be immutable. If you are 
> building a string by manipulating its parts, start with mutable, when 
> finished then convert it to immutable and 'publish' it to the rest of 
> the program. Mutable char[] arrays should only exist as temporaries. 
> This is exactly the opposite of the way one does it in C, but if you do 
> it this way, you'll find you never need to defensively dup the string 
> "just in case" and things just seem to naturally work out.
> 
> I tend to agree that if you try to do strings the C way in D2, you'll 
> probably find it to be frustrating experience.

That is a really helpful insight. It also means string programming is a bit 
different in D2 than in D1.

At some point in time, it might be helpful to add a little introduction 
'howto program with strings' to the D documentation. After all, it is a 
major feature of D and departure from C and C++.