[Haskell-cafe] Re: The state of Hugs
wren ng thornton
wren at freegeek.org
Tue Jul 6 04:59:17 EDT 2010
Ketil Malde wrote:
> wren ng thornton <wren at freegeek.org> writes:
>>> A bit more seriously: is there any listing anywhere of which extensions
>>> Hugs supports?
>> Cabal has a partial listing embedded in its code, though I can't seem
>> to find a textual version at the moment. In general, Hugs has all the
>> features of GHC 6.6: FFI, CPP, MPTCs, FunDeps,
>> OverlappingInstances,... I'm forgetting off-hand whether it has
>> Rank2Types/RankNTypes, but I think so.
Indeed Rank2Types are supported.
>> Of course, since it's GHC6.6-era that means it doesn't support
>> LANGUAGE pragma to enable these features.
> I'm not entirely up to speed on Hugs nor Haskell 2010, but it seems that
> it's fairly close to compliance?
Well here's the list of accepted proposals for 2010:
So far these ones are already implemented:
Which leaves the following (seemingly simple) syntactic changes:
And the following more significant changes:
How significant these last three actually are would depend on the code
base. They shouldn't be too difficult I wouldn't think, but then I don't
know much about Hugs' code nor what sorts of implementation details the
extensions might run into.
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