Extended Type Design.

[Walter Bright]

Frits van Bommel wrote:
> Seriously though:
> "readonly" would mean that you (meaning any code that can access the 
> symbol so declared) can only read data referenced through it, but 
> someone else _may_ be able to write to it[2].

My perception of that is different. I used to do embedded systems, and
'readonly' means the data went into ROM. Also, marking a page in a 
virtual memory system as 'readonly' means that nobody can modify it.

'super const' at least has the connotation of being "constant, this time 
we mean it".