Hazel: A live functional programming environment with typed holes(github.com)
72 pointsby azhenley4 days ago9 comments
  • dang4 days ago
    Related. Others?

    Hazel: A live functional programming environment featuring typed holes - https://news.ycombinator.com/item?id=42004133 - Oct 2024 (86 comments)

    Hazel: A live functional programming environment featuring typed holes - https://news.ycombinator.com/item?id=24299852 - Aug 2020 (14 comments)

  • bitbasher4 days ago
    Hazel is also the name of Cherno's game engine.[1]

    1: https://hazelengine.com/

  • Awtem4 days ago
    i love it. That being said, please show some examples and screenshots on the homepage and github's Readme.
  • burnt-resistor4 days ago
    Missed opportunity to call it "Donut". ;o)
  • dub_gui4 days ago
    The live demo is super cool! https://hazel.org/build/dev/
    • pjmlp2 days ago
      Yes, especially the interactivity that it offers, while clicking around the code.
  • andsoitis4 days ago
    > typed-hole-driven development.

    every hole has a type

    drive the type, drive the hole

    the bigger the hole, the bigger the type

  • Asraelite3 days ago
    I only skimmed the paper, but how do holes in the type system differ from e.g. `!` in Rust or `never` in TypeScript?
    • 7h3kk1d2 days ago
      Never in TypeScript is the equivalent of "bottom" where a value can never appear. The type holes in hazel are for incomplete types (during development) and work more like the any type in typescript where they are consistent with every value.
  • eterps4 days ago
    It would be incredibly interesting to see how LLM code generation would hook into this.
    • gregtc4 days ago
      This is a paper about Chat LLMs in Hazel: https://arxiv.org/abs/2409.00921
      • disconcision4 days ago
        llm hole filling ala the paper is actually live in the dev version right now (if you enter an openrouter API key in the second sidebar tab). it's slow and buggy at the moment though, it's only been running at all for the last few days
  • PontingClarke2 days ago
    [dead]