Rust but Lisp
Get picks like this daily. Today's launch numbers, the top launches, AI and tech news, and a daily opportunity pick, straight to your inbox.
Want to reach these readers? Sponsor an issue.
HN · launched May 9, 2026 · 218 upvotes (top 3%) · 0 views
Niche: programming languages and interpreters · 161 launches, 2 in the last 7 days ▼ -75% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 161 launches in programming languages and interpreters →
Could you build this?
No Creating a language that blends Lisp with Rust semantics requires specialized expertise in compiler construction, formal grammar, type systems, and Rust's borrow checker.
What it would actually take: The project requires a custom parser to convert S-expressions into an intermediate representation, followed by a transpiler or compiler backend generating Rust AST (`syn`/`quote`) or LLVM IR. The hard parts are correctly mapping Lisp dynamic and macro semantics onto Rust's strict static type system, ownership model, and lifetime constraints. This requires deep compiler engineering knowledge, formal type theory, and extensive familiarity with Rust compiler internals.
Discussion
20 comments analyzed.
Competitors mentioned: Fennel (Lisp-to-Lua), Carp (memory-safe Lisp), Dale (C with Lisp syntax), ELSA (Emacs Lisp type checker)
Concerns raised: Macros lack conditionals, not Turing-complete, Single-letter types assumed to be generic parameters, Code doesn't currently compile (span/Display issues), Manual memory management without GC adds complexity, Algebraic effects are implicit globals at scale
Feature requests: Compile to Go, Fix mobile website scrolling and responsive layout, Type-aware macros with declared type information, Garbage collection option instead of mandatory manual allocation
Competitors
Other products that read as similar to this one : 736 launches clear the similarity bar, closest 8 shown.
Attention rank: #23 of 737 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 190 days after the earliest competitor.
- A Common Lisp implementation in development · hn · 2026-04-05 · 7 upvotes · similarity 0.57
- 18KB ls alternative in no_std rust and Libc · hn · 2026-07-15 · 23 upvotes · similarity 0.56
- rust-go-compiler · github · 2026-11-02 · 17 upvotes · similarity 0.55
- Hybrid-Transpiler · hn · 2025-12-26 · 8 upvotes · similarity 0.55
- rust-djinn · github · 2026-10-13 · 20 upvotes · similarity 0.54
- Rust compiler in PHP emitting x86-64 executables · hn · 2026-03-01 · 66 upvotes · similarity 0.54
- RustClamp · ph · 2026-10-24 · 1 upvotes · similarity 0.54
- Rust Database from Scratch · hn · 2026-05-20 · 8 upvotes · similarity 0.54
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.