You can now run interactive mhs in your browser.
Try it!
Maybe try it on your phone. 
It currently only has the base package included, but it is trivial to make a version that has arbitrary packages (well, those that mhs can compile) embedded in the system.
The site consist of a small index.html (4K) and a rather hefty mhs-embed.js (2.3M). The latter contains the compiler, runtime system, and base package. It is built by emscripten to compile the C code to JS and Wasm.
Currently, you cannot access the local file system. So you cannot load or save files. That makes it rather useless. I will happily accept contributions that add file system access.
25 Likes
Cool demonstration!
I’m finding it a little hard to use; lack of arrow keys and pasting makes it tricky to navigate, and it would be nice to be able to run IO so one could do traverse (print) [1,2,3] (as was my first instinct).
I have to figure out arrow keys and pasting. But ctl-p etc work.
You can run traverse print [1,2,3] >> return (). You expression must either be IO () or have Show.
1 Like
Arrow keys and pasting should work now. There’s probably more work needed on copy&paste.
1 Like
Congrats! Amazing!
I enjoyed the still-minimal UI. I tried it as a calculator, but it’s a little floating point challenged:
> 0.5
Infinity
2 Likes
Yeah, I need to debug the FP.
I’ve uploaded a version where floating point works.
2 Likes
Could you use MicroHs to compile to (Pallas) PLAN?
Since the last step before going to combinators is untyped lambda calculus, I would think you could get PLAN from that.
You’d have avoid anything Haskell specific, say forkIO or MVar, of course.
1 Like