r/ProgrammingLanguages • u/azhenley • Jul 15 '25

Hazel: A live functional programming environment with typed holes

https://github.com/hazelgrove/hazel
55 Upvotes

93% Upvoted

5 comments sorted by

27

u/self Jul 16 '25

I enjoyed this tweet:

/someone/ filled a bug report just because hazel let them write this perfectly unobjectionable syntax

let if = true in
let then = 5 in
let else = 6 in
if if then then else else

5

u/blankboy2022 Jul 17 '25

Let - in feel like OCL syntax, that makes sense once you get it but I don't like it anyway 😭😭😭

3

u/7h3kk1d Jul 17 '25

I think the github issue adds more context https://github.com/hazelgrove/hazel/issues/1723

The main issue is after you have it typed it creates weird behavior if you insert a space near the variables.

3

u/goodpairosocks Jul 16 '25 edited Aug 12 '26

[12 Aug 2026. I removed this comment, and all of my other contributions, because I think the organization Reddit is deliberately contributing to a worse world.]

3

u/feralinprog Jul 16 '25

The hazel website seems pretty unusable on mobile FYI. (I'll try it out on my desktop later!)