eopl3
typed-racket
Our great sponsors
| eopl3 | typed-racket | |
|---|---|---|
| 1 | 5 | |
| 11 | 506 | |
| - | 2.0% | |
| 3.5 | 7.4 | |
| 4 months ago | 7 days ago | |
| Racket | Racket | |
| - | GNU General Public License v3.0 or later |
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eopl3
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How to get started?
I've been going through the book myself using Haskell and it's been a blast. I recently completed Chapter 5 and here's some of what I learned to implement along the way: a CPS (Continuation-passing style) interpreter, how to add support for continuations, trampolining, how to use CPS to add support for exceptions and threads. Here are the various interpreters: https://github.com/dwayne/eopl3/tree/master/solutions/05-ch5/interpreters/haskell.
typed-racket
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Experimenting with the new Typed Racket modes
Turns out, Shallow was slower than it needed to be for types of built-in math (+, *, ...). PR here: https://github.com/racket/typed-racket/pull/1316
- Racket->Rhombus: To Sexp or not to Sexp?
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Coalton: How to Have Our (Typed) Cake and (Safely) Eat It Too, in Common Lisp
Last weekend, I put together a working sample for how to show multiple syntax errors from Racket macros. It works in DrRacket and racket-xp-mode. It's based on Typed Racket.
https://gist.github.com/srcreigh/f341b2adaa0fe37c241fdf15f37...
The well-documented Racket `raise-syntax-error` will let you display 1 syntax error at a time. It works by throwing an exception during macro expansion hence you only get 1 error in your IDE. That code lets you highlight 2+ errors.
Please build a type system in Racket! I would love to try it out.
Helpfully, the above sample code is an example of how to store compiler-level state. So next, just wrap all your base forms, add some type declaration syntax, type inference, etc.
I would love to have a language that can be used to define a customized type system in Racket.
Typed Racket is an incredible feat. Can you imagine adding an entire type system without writing a separate compiler? Using all the batteries included with your language?
However I don't like that Typed Racket enforces soundness with Runtime checks, I much prefer TypeScript style checking. I also have run into some pretty confusing messages ie [1]. Diversity is healthy, it'd be nice to have static typechecking systems to choose from for Racket.
[1] https://github.com/racket/typed-racket/issues/1021
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Creating Languages in Racket (2011)
> I like how TS is unsound (has no runtime performance penalty for mixing untyped code), and is easily disabled via any if it's in the way.
This is already done. See https://github.com/racket/typed-racket/pull/952 for RFC and https://github.com/racket/typed-racket/pull/948 for the implementation.
What are some alternatives?
compiler - an incomplete toy barebones compiler backend for amd64 x86_64 in Python and an incomplete JIT compiler written in C
iracket - Jupyter kernel for Racket
racket-rash - The Reckless Racket Shell
racketscript - Racket to JavaScript Compiler
mlton - The MLton repository
pollen - book-publishing system [mirror of main repo at https://git.matthewbutterick.com/mbutterick/pollen]
frog - Frog is a static blog generator implemented in Racket, targeting Bootstrap and able to use Pygments.
sham - A DSL for runtime code generation in racket
multiversion-concurrency-control - Implementation of multiversion concurrency control, Raft, Left Right concurrency Hashmaps and a multi consumer multi producer Ringbuffer, concurrent and parallel load-balanced loops, parallel actors implementation in Main.java, Actor2.java and a parallel interpreter
renegade-way - Option Trading Application