const again

[Walter Bright]

BCS wrote:
> totally random though: I'm designing a program and ran across a place 
> where I want to say "this pointer shall never be dereferenced, it shall 
> only be used as an identity" the idea being that I want to be sure that 
> the code has no dependencies on anything under it. It would be used 
> somthing like a key in a hash table but where the test is "same thing" 
> not "equal things". What should this be implemented as? Does this have 
> any place in the const system? Is there an existing clean solution?

Since the point of a pointer is to dereference, perhaps a pointer is the 
wrong thing. Perhaps it should be a struct.

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Doolittle: "Bomb, what is your purpose?"
Bomb #20: "To explode, of course"
    -- Dark Star