[Nickle] const vs. final

[Bart Massey]

I think Jamey's main complaint may have been that the error
message is buggy, which seems true.  Certainly he shouldn't
have expected to be able to assign a const---oh wait, he's
thinking of the gosh-awful C "const" parameters.  No, Jamey
there aren't any of those in Nickle, thank goodness.

I also agree that there's an odd hole in the language with
enums.  One would like to be able to get one's hand on the
ordinality and cardinality of a tag as in C, but right now
we hide it.  I understand the reasons for this, but at the
same time I'm tempted to expose the tag values via
conversion functions, as I believe we thought we would do in
the past...

Our enums are kind of horrible, as we know.  Maybe we should
do some kind of Scheme-style "symbols" instead of disjoint
union types?

	Bart

In message <E1ByLR9-0004Da-T7 at evo.keithp.com> you wrote:
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> 
> Around 16 o'clock on Aug 18, Jamey Sharp wrote:
> 
> > The behavior that I want is like Java's 'final'. Assignments to
> > uninitialized const values should be allowed. Is there something wrong
> > with doing that?
> 
> const can only be assigned in their initializer.  Given the flexibilty 
> available with nickle initializers, is there some functionality we're 
> missing that you need? Your 'enumerate' function seems quite suited to a 
> comprehension...
> 
> -keith
> 
> 
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