Niklas: I missed your note about calling Haskell from JS, see this for Fay: https://github.com/faylang/fay/wiki/Fay-Status-Update-September-2013%3A-ZuriHac%2C-typeclasses%2C-haskell-suite%2C-and-strictness-wrappers#javascript-fay-communication
On Wed, Sep 4, 2013 at 8:18 PM, Luite Stegeman <stege...@gmail.com> wrote: > > On Wed, Sep 4, 2013 at 6:32 PM, Daniil Frumin <difru...@gmail.com> wrote: > >> >> >> I think it's nice that you've raised that question, I will think about >> implementing a finer API for calling Haskell from JS. >> >> > It sounds like something like h$runSyncWithResult (name open for > bikeshedding) that takes an IO (JSRef a) and returns the result to the > caller, or null (exception?) when the synchronous thread terminated for > some reason, would fit the bill. I think this can be implemented in a few > lines of JS. > > the current API is a bit bare-bones, based around calling main or a few > other top-level IO actions and doing the rest from Haskell code. The > Haskell code can make callbacks (JS functions that run Haskell when called, > see [1] ), but that can be a bit cumbersome to use when wrapping a library > with lots of external JavaScript. > > If anyone has ideas of how they'd like a call-Haskell-functions-from-JS > API to look, I'd be happy to hear and see if we can make something nice. > > One thing to keep in mind though is that type information has been erased > from the compiled code, making a generic applyHaskellFun(fun,x,y) that > would run 'fun x y' and return its result would be rather risky. That's why > the syncCallback/asyncCallback actions use JSRef, letting the Haskell side > do the conversion. Going through 'foreign export' could work though, or > perhaps there are other options that make this safer. > > luite > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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