Re: [Caml-list] Teaching bottomline, part 3: what should improve.

[David Teller <d.o.teller@gmail.com>]

On Wed, 2007-05-23 at 09:16 +1000, skaller wrote:
> On Tue, 2007-05-22 at 18:10 -0400, David Teller wrote:
> 
> > * Error messages of the type system are somewhat obscure. 

[...]

> I understand that is may be hard, if not impossible, to implement,
> as it would require a unification engine that could manage
> source references in parallel with deductions .. still the information
> IS available originally.

I tend to believe that there is a simple solution to the problem (I
haven't looked at Dan Grossman's paper yet): re-run the typing of the
last function and print out the hypothesis and each unification as it
happens.

> I bet this would be an interesting and valuable PhD project,
> and, IMHO, without it type inferencing languages are useless
> in industry. 

I concur.

> Type errors in Ocaml code are very common for the
> simple reason they're just about the only error you can make :)

:)

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David Teller ------------------------------------------
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