letlang
lobster
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letlang
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Letlang — Roadblocks and how to overcome them - My programming language targeting Rust
That works for any types (except the functional types), and even the generic ones. During code generation, I create structs that implement the Type trait.
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A new milestone for Letlang (targeting Rust) - Effect Handlers
As stated on the website ( https://letlang.dev ), Letlang is a general-purpose language.
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Writing a simple Lisp interpreter in Rust
Author here, the article is more about how Rust and its ecosystem are nice tools for language designers rather than the beauty of Lisp.
The crates listed in that article are the ones I use for my compiler: https://letlang.dev
Lisp was only chosen as a way to demonstrate the power of those crates and Rust features. A kind of way of justifying my choices for Letlang.
It's not "you should do it like this" but "you can do it like this".
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Ask HN: Possible? Faster than C, simpler than Python, safer than Rust
"Faster than C", I saw people write C code slower than a Python equivalent. So I have to admit, I don't know what it means for a language to be fast, because it depends on the algorithm being implemented.
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"simpler than Python", what does "simple" mean?
Simple design? Python's design is very complex (take a look at "Crimes with Python's pattern matching" < https://www.hillelwayne.com/post/python-abc/ > for example), on the other hand, assembly languages, or Lisp, or Forth, have a very simple design.
Simple as in "easy to use"? Rust is easy, write code, fix what the compiler tells you you did wrong. Joke aside, Go is quite easy to use and while I personally don't like this language, I get why it replaced Python in a lot of use cases.
Also, once you get used to the OTP framework, Erlang/Elixir/Gleam/any beam language are quite easy to use and have less footguns than Python.
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"safer than Rust" is too vague. Is it memory safety? type safety? thread safety? cosmic ray safety? A mix of all of that?
Let's guess you meant "memory safety". All languages with a Garbage Collector are "memory safe".
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On a semi-unrelated note, I've been working on https://letlang.dev
It's a language inspired by Erlang/Elixir (same concurrency model) that compiles to Rust code (the runtime use tokio). It is immutable, have no Garbage Collector thanks to Rust semantics, and dynamically typed.
I haven't run any benchmark (it's not even finished, I've been working on the specification before continuing the implementation), but I guess it could be slower than a rock.
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For some recommendations, have you looked at Zig? Nim? Hare?
https://ziglang.org/
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Syntax for defining algebraic data types
In my language (Letlang), I use the keyword class with structural pattern matching and optionally a predicate. Types (or rather, classes) can be combined with logical operators &, |, !:
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Erlang's not about lightweight processes and message passing
Not sure this is what GP is talking about but to implement the actor model in https://letlang.dev I use tokio.
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Features you've removed from your lang? Why did you put them in, why did you take them out?
In the early drafts of Letlang, I had the goal to add an equation solver. I got rid of that because:
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What features would you want in a new programming language?
I'm working on a programming language inspired by erlang and which compiles to Rust: https://letlang.dev
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Six programming languages I’d like to see
For a contract based language and a "really dynamically typed language", I'm working on https://letlang.dev
And it's because I haven't thought yet about how to do static type checking with such a feature.
I haven't got any time to work on it in the past few weeks, and I'm the only dev (would really love some help). So, it will be ready when it will be ready :P
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Hello Letlang! My programming language targeting Rust
I use Rust generators to implement them, a rudimentary example: https://github.com/linkdd/letlang/blob/main/letlang_runtime/src/utils/entrypoint.rs
lobster
- The Lobster Programming Language
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The Neat Programming Language
I think lobster does this.
"Compile time reference counting / lifetime analysis / borrow checker."[1]
"Reference Counting with cycle detection at exit, 95% of reference count ops removed at compile time thanks to lifetime analysis."[1]
[1] https://strlen.com/lobster/
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Why does Rust need humans to tell it how long a variable’s lifetime is?
There is another language, Lobster, that uses lifetime analysis like Rust, but IIUC infers lifetimes completely automatically. It looks like the idea is still experimental - I'm interested to see how it goes.
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What are some must have built-in modules in your opinion/experience?
I think the ability to open a window and do graphical stuff is actually pretty underrated in core language functionality. There's a few game-oriented programming languages like Lobster that put windowing and graphics in the core language functionality, and I think it's pretty neat. The biggest downside is that it's a lot to bite off, because you'll probably want to have standardized API functionality for a whole host of things like font rendering, image loading, etc.
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Minetest: An open source voxel game engine
The actual game itself, yes. Based on this open source project though which provides the language its written in and core engine tech: https://github.com/aardappel/lobster
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Plane - FOSS and self-hosted JIRA replacement. This new project has been useful for many folks, sharing it here too.
I'm keeping an eye on Lobster though. It fixes most of Python's problems. It's way faster, has proper static typing, the import system is sane, etc.
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Using a borrow checker to track mutable refs in a GCed FP language?
Lobster (https://strlen.com/lobster/) appears to at least do lifetime analysis to reduce refcounting. I'm not sure about automatic interior mutability. I feel like there's a keyword here that can help find other compilers with similar features.
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What would make you try a new language?
Also, can I introduce you to https://strlen.com/lobster/, a garbage collected language made for game development by (and primarily for) the one and only Wouter "aardappel" van Oortmerssen?
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In a custom typed imperative programming language, what should the compiler do next, after resolving variable references?
I would like to make it work to some degree like Rust with a borrow checker, and have optional static typing (with type inference wherever it can). Other sources of inspiration, lobster lang, and dart. It is going to (eventually...) compile to several places like dart (browser, iOS, android, linux, etc.). After I've created the AST, I've gone straight to code generation, because that's the easy part IME. But now have to insert the "middle" and do typechecking/borrowchecking/inference/other checking. This is for an imperative-style language.
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Features you've removed from your lang? Why did you put them in, why did you take them out?
Over the ~12 years of Lobster (https://strlen.com/lobster/) 's existence, features that were removed (in this order): * Lexical scoping. * Icon style backtracking. * Small-talk like syntax. * Dynamic Typing. * Multimethods. * Frame based state (like FRP). * Co-routines.
What are some alternatives?
zigself - An implementation of the Self programming language in Zig
cakelisp - Metaprogrammable, hot-reloadable, no-GC language for high perf programs (especially games), with seamless C/C++ interop
scenebuilder - Scene Builder is a visual, drag 'n' drop, layout tool for designing JavaFX application user interfaces.
treesheets - TreeSheets : Free Form Data Organizer (see strlen.com/treesheets)
cells - A Common Lisp implementation of the dataflow programming paradigm
language-ext - C# functional language extensions - a base class library for functional programming
power-fx-host-samples - Samples for hosting Power Fx engine.
mun - Source code for the Mun language and runtime.
impulse - Impossible Dev Tools for React and Tailwind
swift - The Swift Programming Language
halo - An experimental graph-based meta programming language
cligen - Nim library to infer/generate command-line-interfaces / option / argument parsing; Docs at