tl
Fennel
tl | Fennel | |
---|---|---|
54 | 91 | |
1,944 | 2,294 | |
1.9% | - | |
7.7 | 9.3 | |
3 months ago | 7 days ago | |
Lua | Fennel | |
MIT License | MIT License |
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tl
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Ravi is a dialect of Lua, with JIT and AOT compilers
it's based off MIR, does it have something to do with https://mlir.llvm.org/ ?
for typed lua, there is another effort https://github.com/teal-language/tl in addition to the mentioned typescript approach: https://github.com/andremm/typedlua
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Lua Criticism Is Unwarranted
I had the pleasure of working with Lua 5.1 back in the late noughties. For me it's replaced Tcl whenever I want something I can configure above a C library. At the time I used it I found it quite nice but I'll also not forget the hours I wasted tracking down nil table corruptions which could have easily been caught by a type checker.
I had some hope that Luau https://luau-lang.org or Teal https://github.com/teal-language/tl would make things better but with the following example
function foo(x: number): string
- Why Fennel?
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Algebraic data types in Lua (Almost) post
I wonder why the author doesn't use Teal [0] - a typed dialect of lua.
[O] https://github.com/teal-language/tl
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Lua: The Little Language That Could
Check out Teal
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What's the deal with Fennel in Neovim?
There is already https://github.com/teal-language/tl, which is typed Lua. I think fennel exists to serve a different niche-- personally I use it not for any type features; I just like the syntax better, and others may find certain features like the macro system useful.
- Using Lua with C++
- Teal – Type Hints for Lua
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Using other languages
There's also some languages made to compile straight to Lua: - MoonScript is the most popular Lua wrapper - it's built to be more Python-like, featuring indentation-based scopes, function calls without parentheses, lambda syntax, list comprehension, and much more. - Yuescript is a modern update to MoonScript that adds more features (I haven't used it myself, so I'm not entirely sure exactly how it differs from MS). - Teal is a version of Lua that adds static typing for better code standards.
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Bog – small, strongly typed, embeddable language
Terra and Nelua are both very different in goals than Teal. Teal is literally gradual types integrated into Lua keeping as many of Lua's idioms as possible (to a fault[1]). Terra and Nelua are both very metaprogrammable systems programming languages. Nelua's goals are primarily to soften C's rough edges, comparable to something like Nim.
There's another one you missed in Pallene[2]. But again, it's goal was to optimize the stack sharing involved in using the C API. It also adds types though and maintains Lua idioms as much as possible.
[1]: https://github.com/teal-language/tl/discussions/339
[2]: https://github.com/pallene-lang/pallene
Fennel
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Did we lose our way in making efficient software? – ~30 MB doc file vs. browser
It's interesting: minimal software is out there, but folks don't tend to choose it. I spend a fair amount of time thinking about how to be conservative in my dependencies, and this encourages a lightweight stack that tends to perform pretty well. These days, I'm favoring tools like Lua, SQLite, Fennel[0], Althttpd[1], Fossil[2], and the Mako Server[3] and find that great, lightweight, stable, efficient software is to be had, for free, but you have to go a bit off the beaten path. This isn't stuff you hear about on Stack Overflow.
In terms of frontend, which the post focuses on (Google Docs and a 30MB doc), I guess I'm conflicted. While I tend to favor native apps + web pages, I'm also a daily Tiddlywiki user, and I really think web apps have their place (heck, one idea I'm working on is a lightweight local server that lets you run web apps like Tiddlywiki). But without a doubt, Tiddlywiki is more resource intensive than Emacs (my go-to for notetaking when I'm not on TW). My tab for a 6MB Tiddlywiki file uses 155MB of RAM, and my (heavily customized, dozens of open buffers) Emacs session uses 88MB. So I do think the author has a good point.
[0]: https://fennel-lang.org/
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Pluto, a Modern Lua Dialect
Eh it's not just luajit and luajit didn't create that problem either. It's a symptom of lua actually succeeding at its design goal of being easily embedded as an extension language. A significant number of incompatible runtimes are more popular than the most recent puc lua, including I believe the older official lua 5.2 released in 2011.
I've done a fair bit of professional lua development and I don't think I've ever written standalone up-to-date puc lua except maybe for some tooling & scripts. It's such a small language and used in such a way that the runtime, distribution method, and available APIs have much more impact on your use (and compatibility) than the version.
Virtually everyone shipping a lua environment is also shipping changes to it that make it a unique target, if only extensions to the standard library. This is why I think syntax layer-only approach like fennel's is the correct choice for improving on lua. It mirrors lua's runtime semantics exactly, and allows you to access the implementation peculiars on their own terms and so can just be run on time of any lua system.
https://fennel-lang.org
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LÖVE: a framework to make 2D games in Lua
Just learned about https://fennel-lang.org/ , could have probably used that as well to avoid Lua.
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The Bipolar Lisp Programmer
> I’m positive that there is a Lispy language out there (actually in existence, or the aether) that is appropriate for embedded work, but the constraints of the target make it difficult to envision.
Perhaps Fennel* fits the bill?
* https://fennel-lang.org/
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The Future of the Vim Project
I've also seen neovim plugins written in fennel [0], so if you want something lispy, that's possible now.
[0]: a Lisp that compiles to Lua, https://github.com/bakpakin/Fennel
- Qual a linguagem que vocês mais gostam de programar?
- Can I use elixir as the scripting language of my game engine?
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TimL: Clojure-like Lisp dialect that runs on and compiles down to Vimscript
Something similar: Fennel (https://fennel-lang.org/) is a lisp that compiles into Lua, which nvim can use as plugins, so you can write nvim plugins in a lisp. Aniseed (https://github.com/Olical/aniseed) makes this really easy.
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Announcing automation-service: write and schedule home automation scripts in Lua
If you want a more FP language on the Lua runtime, you might be interested in Fennel. I wrote a post about adding Fennel compiler to a hslua interpreter a while back, which might be useful for you.
- 916 Days of Emacs
What are some alternatives?
luau - A fast, small, safe, gradually typed embeddable scripting language derived from Lua
janet - A dynamic language and bytecode vm
OpenBBTerminal - Investment Research for Everyone, Everywhere.
urn - Yet another Lisp variant which compiles to Lua
packer.nvim - A use-package inspired plugin manager for Neovim. Uses native packages, supports Luarocks dependencies, written in Lua, allows for expressive config
nvim-lspconfig - Quickstart configs for Nvim LSP
rpi-open-firmware - Open source VPU side bootloader for Raspberry Pi.
Lua-RTOS-ESP32 - Lua RTOS for ESP32
luaforwindows - Lua for Windows is a 'batteries included environment' for the Lua scripting language on Windows. NOTICE: Looking for maintainer.
lua-languages - Languages that compile to Lua
pallene - Pallene Compiler
webassembly-lua - Write and compile WebAssembly code with Lua