hatsugen
fyg-lang
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hatsugen
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A decade of developing a programming language
Might this help? I wrote it: https://azdavis.net/posts/define-pl-01/
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Rust in 2023 - azdavis
Perhaps my own series of posts? It starts here.
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Memories: Edinburgh ML to Standard ML
2. Preservation states that if you have a program that type-checks _and_ that can continue evaluating, _as_ it continues to evaluate, it _continues_ to type-check.
Note that the conclusion of preservation 'feeds back' into progress: the program type-checks. And vice versa: progress may state as its conclusion that the program can continue evaluating, which then lets you apply preservation. This means you can keep applying the progress and preservation theorems in a 'loop' until the program is done evaluating.
For each of the 4 posts in my series about formal semantics, I duly translated the rules presented in the blog post into Lean code, and then proved that the rules do satisfy the safety properties. For example, for the first post linked above:
- The syntax of the language: https://github.com/azdavis/hatsugen/blob/part-01/src/syntax....
fyg-lang
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A decade of developing a programming language
Cool to see an implementation in Go, nice! Here's where I got to with my first attempt: https://github.com/cobbweb/flite. There's definitely stuff I'd do a bit different, my second attempt is actually a project to learn Rust with, but I'm already considering switch to Ocaml haha!
What are some alternatives?
pkg - Package your Node.js project into an executable
pattern-matching-in-rust - Pattern matching and exhaustiveness checking algorithms implemented in Rust
rust - Empowering everyone to build reliable and efficient software.
Cycle.js - A functional and reactive JavaScript framework for predictable code
sml-buildscripts - Scripts to compile and run Standard ML programs defined in .mlb files.
write-you-a-haskell - Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)
hm - a simple Hindley-Milner type system in Go
go - The Go programming language
example - Go example projects