FYI ghc-bignum has been merged yesterday.
Cheers,
Sylvain
On 15/06/2020 11:28, Rinat Stryungis wrote:
In light of the mentioned patch, I prefer to freeze my activity about
the unification of Nat and Natural up to the merging this patch. After
that, I am going to rebase my branch and make MR. Thank you, Ben!
пн, 15 июн. 2020 г. в 00:32, Ben Gamari <b...@well-typed.com
<mailto:b...@well-typed.com>>:
Rinat Stryungis <lazybone...@gmail.com
<mailto:lazybone...@gmail.com>> writes:
> Hi. I have a question about a possible way of unification of Nat and
> Natural. I've almost done that, but only in case of using
integer-gmp.
> If I use integer-simple there is a completely different
definition of
> Natural.
>
> How I construct now naturalTyCon (to make `naturalTy` to use it
instead of
> `typeNatKind`) :
>
> ```naturalTyCon :: TyCon
> naturalTyCon = pcTyCon naturalTyConName Nothing []
[natSDataCon,natJDataCon]
>
> natSDataCon :: DataCon
> natSDataCon = pcDataCon natSDataConName [] [wordPrimTy] naturalTyCon
>
> etc...
> ```
> Now I have to check`DynFlags` in a few places to reimplement
`naturalTyCon`
> in case of using `integer-simple`.
>
> Is there a way to avoid hardcoding of `naturalTy`?
> My colleague said that it would be nice to get `naturalTy` from an
> environment by something like `lookupTyCon`,
> but there are many functions whose don't use any environment
like functions
> from `typeNatTyCons` list in `GHC.Builtin.Types.Literals`.
>
> Now I am going to use `DynFlags` checking, but it looks like an
ugly way...
Note that all of this will be moot in a matter of days. The ghc-bignum
patch, which will ship in 8.12, removes integer-simple and uses a
consistent number representation across its various supported
backends.
In light of this, if I were you I would probably just settle for a
hack
in the meantime.
Cheers,
- Ben
--
Best regards.
Rinat Striungis
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