Gavin Zhao @[email protected]

ghc wasm backend jsffi has finally been implemented! the rest is source notes as well as user-facing documentation. not sending a #haskell discourse thread yet, but for the curious eyes, here's what's supported so far (and also an ama thread):

1. calling sync js function

foreign import javascript unsafe "console.log($1)" js_log :: JSVal -> IO ()

js src text can be any valid js expr or statements, using $1 etc to refer to the haskell arguments. JSVals are first class haskell values and garbage collected.

2. calling async js function

foreign import javascript "fetch($1)" js_fetch :: JSString -> IO JSVal

await is supported in js src text. calling it initiates the side effect immediately, and returns a thunk that only blocks on promise resolution when forced, allowing concurrency without even needing to fork haskell threads. promise rejections are captured as haskell exceptions.

3. js callback -> haskell function

foreign import javascript "dynamic" js2hs :: JSVal -> Arg1 -> Arg2 -> Result

pretty much same thing like "dynamic" ccalls, though we use JSVal to represent a js callback instead of FunPtr.

4. hs function -> js callback

foreign import javascript "wrapper" hs2hs :: (Arg1 -> Arg2 -> Result) -> IO JSVal

yup, this converts any haskell function closure to a js callback that you can pass to 3rd party frameworks. it's garbage collected on the js side as well, the haskell closure will be dropped if the callback is unreachable in js later.

5. foreign exports

foreign export javascript "js_func_name" hs_func_name :: Arg1 -> Arg2 -> Result

this will end up as a wasm export named "js_func_name" directly callable in js, and it returns a promise of the final result that can be awaited.

the hardest part of all the above work is concurrency & re-entrancy: calling async js should be cheap, should not block the runtime, should play well with existing threading model in haskell. and hs can call into js that calls back into hs, indefinitely. i'll write up more detailed explanation on how this is delivered

RT GyDi
Git可以这样根据不同的目录去区分git配置，这样就可以对不同的项目设置不同的全局user email了

https://twitter.com/zzzgydi/status/1717410715571802404

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🏀 ⠀⢀⣿⣿⡿⢿⠈⣿
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#叼图time

I'm excited to announce a new "prefaculty" position working with the type systems team at Jane Street on the OCaml compiler!

I think this should be an exciting position for someone who is starting off their academic career and is looking to learn more about large scale practical applications of type systems, and to build longer term research connections.

Please retoot!

https://www.janestreet.com/join-jane-street/programs-and-events/visiting-researcher-prefaculty/

Unfortunately due to an upcoming #furlough, I will need to look for other work (full-time or otherwise). If you or someone you know need a senior #frontend / full-stack dev, in #EU (I live in Finland, remote work), please boost, ping, slide into DMs or email me (in CV).

I put together an image with some tech. info and what I do in my free time, CV posted below with link as well. Requirements and preferences in 🧵

https://joshuastrobl.com/CV.pdf

Boosts greatly appreciated ❤️

#mastodonjobs #jobsearch

Coming to Mastodon from Twitter feels like busting in the door loudly brandishing a half drunk bottle of tequila and finding everyone sitting in horrified silence holding cups of tea and academic papers

RT Jackeroo
形象不？ https://t.co/isMA7PA06N

https://twitter.com/isJackeroo/status/1674035838504828930

llm based git conflict resolver when

It is time for #Solus to embark on a new voyage. The journey ahead is incredibly exciting for users and contributors alike - the very foundations of our project, the ideas that held us together over the years, are finally coming to fruition.

Read more at https://getsol.us/2023/04/18/a-new-voyage

Hey folks, Josh here. Long time no see.

We got a new post up on Reddit and will have a blog post forthcoming on Tuesday, with organizational structure changes, plans for #Solus 4.x, Solus 5, and more.

https://www.reddit.com/r/SolusProject/comments/12ndrvt/righting_the_ship/