Show HN: Erlang code generator for Idris 2
github.com
github.com
The website includes a blog post about how the website was built: https://www.typedtext.io/posts/view?id=2
Not yet, but I am interested in building a web framework that is inspired by Phoenix Framework (I really like the Plug abstraction) and Hyper (https://github.com/purescript-hyper/hyper).
I would also like to support Phoenix LiveView in some shape or form.
https://gist.github.com/macintux/6349828#alternative-languag...
Has someone been using Idris (1 or 2) as their "daily driver" language? How has that gone, can you be productive in it?
Can you quickly document the big steps to write a codegen?
I have some ideas I want to have explore.
I think the easiest way to get going is to start from an existing code generator. Idris 2 currently supports: Chez Scheme, Racket, Gambit Scheme and JavaScript. Pick the language you are most familiar with.
The files that are relevant to the Chez Scheme code generator are located here (similar locations for the other code generators): https://github.com/idris-lang/Idris2/blob/master/src/Compile..., https://github.com/idris-lang/Idris2/blob/master/src/Compile..., https://github.com/idris-lang/Idris2/blob/master/support/che...
The current code generators are based on an intermediate representations called `NamedCExp`, defined here: https://github.com/idris-lang/Idris2/blob/master/src/Core/Co... `NamedCExp` describe various forms an expression can take. These need to be translated into the target language. For example `NmApp` represents calling a function with the given arguments. You don't need to implement everything to make a proof of concept.
The following document describe how to add a new code generator (It does not go into details of building it): https://idris2.readthedocs.io/en/latest/backends/custom.html
You can see an overview of the different intermediate representations here: https://github.com/chrrasmussen/Idris2-Erlang/blob/master/do... (Note that ErlExpr and AbstractFormat is specific to the Erlang code generator)
If you have more questions, you are welcome to join the Idris community at any of the locations listed here: https://www.idris-lang.org
It should still be possible to bootstrap Idris 2 from Idris 1, via Idris2-boot (https://github.com/edwinb/Idris2-boot), and via version 0.2.1 of Idris2 (https://www.idris-lang.org/idris-2-version-021-released.html).