A few years back, I looked into to the possibility of using CINT
build an REPL for ATS2. Now Cling seems to be under active development:

https://root.cern.ch/cling

If one wants something performant, this route seems to be promising.


On Sun, Oct 21, 2018 at 8:34 PM Vanessa McHale <vanessa.mch...@iohk.io>
wrote:

> FWIW, I have written ATS2 code that compiles to C which is then wrapped
> with a Haskell library that GHCi is able to interact with.
>
> Have a look here:
> https://github.com/vmchale/hs-ats/tree/master/fast-arithmetic.
>
> You can run cabal new-repl and then
>
> λ:> import Numeric.Combinatorics
>
> λ:> 400 `choose` 20
>
> 2788360983670896737872851072994080
>
> It's not the same as native support, but it does allow a certain type of
> development to go on.
> On 10/21/18 3:17 PM, gmhwxi wrote:
>
>
> Supporting the use of external functions (e.g. those defined in C)
> in the REPL would be limited if at all. But there are pluses as well.
> The REPL I have in mind should support various forms of inspection,
> playing a big role in facilitating meta-programming with ATS.
>
> On Sunday, October 21, 2018 at 4:02:17 PM UTC-4, Raoul Duke wrote:
>>
>> as i naive day job programmer, i hope that repl/interpreter doesnt have
>> to imply any lack of feature support, so one could still do types &
>> templates & bears oh my.
>>
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