(WIP) Elisp Backend for Purescript

kamoii · January 24, 2022, 4:48pm

Hi.
I’ve been working on a new CoreFn-type backend for PS to enable writing PureScript programs that transpiles to elisp: https://github.com/psel-org/psel.
I’ve been thinking that an elisp backend would be useful for a long time, and after studying the purenix code, it looked like I could make one, so I started the project.

Currently still working on core and contrib libraries, but at this point the transpiler is functionially complete.

bjornkihlberg · January 26, 2022, 5:50pm

I was thinking about doing something similar with ChezScheme.

f-f · January 26, 2022, 7:20pm

@bjornkihlberg this is another work in progress!

Development has slowed down at the moment due to other things taking priority, but if you’d like to help out I’d be happy to support that

halloleo · January 27, 2022, 2:52am

Very cool. I will watch this development closely.

bjornkihlberg · August 2, 2022, 8:00am

Sorry for late reply, I’m very interested in this.

harryprayiv · February 19, 2026, 4:49am

I was using this backend to try and squeeze as much performance as I could from the sha3 module and I reached a bottleneck with flexvectors. So, I added bytevectors just now in a fork. I’d be honored to submit it as a pull request if you think it is a worthy addition to the stack.

github.com

harryprayiv/purescm/blob/bytevector/lib/purescm/bytevector.ss

#!chezscheme
(library (purescm bytevector)
  (export
    ;; Construction
    bytevector-make

    ;; Pure accessors (curried for PureScript calling convention)
    bv-length
    bv-ref
    bv-set

    ;; Slicing / concatenation
    bv-slice
    bv-concat

    ;; Equality / comparison
    bv-eq?
    bv-compare

    ;; Conversion: flexvector <-> bytevector

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Edit: Hilariously, bytevectors didn’t win me as much extra performance as I expected.